Belshaw Brothers Mark IX General Manual

®

Donut Robot

Mark IX

Operator’s Manual

and

Technical Supplement

Belshaw Bros., Inc.
814 44th Street NW, Suite 103
Auburn, WA 98001 USA
Tel: [phone]
Fax: [phone]
Toll Free (US): 1-800-578-2547
E-mail: [e-mail]
www.belshaw.com

Donut Robot



Mark IX

Operator’s Manual

Belshaw Bros., Inc.

814 44th Street NW, Suite 103

Auburn, WA 98001 USA

Phone: [phone]  Fax: [phone]

E-mail: [e-mail]  http://www.belshaw.com

If you accept the machine from the shipping
company, you are, in effect, saying that the
machine is in good condition, and you must
pay for the machine. Belshaw cannot pay for

shipping damage, because the freight company
has accepted the machine from Belshaw in good
condition, and is responsible for its safe delivery.
For your protection, inspect the machine to see
that no parts are bent, scratched, or otherwise
damaged. If any damage has occurred in
shipping, file a freight claim with the shipping
company immediately.

EQUIPMENT RECORD

Please provide the information below when you correspond with us about your machine.
Purchased by _____________________________________________________________________
Installed by ______________________________________________________________________
Date of Installation ________________________________________________________________
Model number ___________________________________________________________________
Serial number

012308

MN-1052EN

Belshaw Bros., Inc.

814 44th Street NW, Suite 103

Auburn, WA 98001 USA

Phone: [phone]  Fax: [phone]

E-mail: [e-mail]  http://www.belshaw.com

Contents

1 Operation 1

Making Cake and French Donuts 1
Making Yeast-Raised Donuts 3

2 Cleaning 5

Cleaning the Plunger, Hopper, and Cylinder 5
Cleaning the Conveyor and the Kettle 6

3 Maintenance 11

Taking Care of the Plunger, Hopper, and Cylinder 11

4 Related Products 12

FT-42 Feed Table 12
Roto Cooler 15
Icing Finishing Tree and Roto Cooler 16
Sugaring Tray and Roto Cooler 17
Filter Flo Siphon 18
Shortening Reserve Tank 21

5 Donut-Making Helps 22

Tips on Making Quality Cake Donuts 22
Calculating Correct Water Temperature 23
Ratios of Plunger Sizes to Donut Weights 23
Temperature Conversion 23

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Donut Robot Mark IX OM MN-1052EN iii

Preface

The Donut Robot Mark IX is designed to
automatically cut and fry cake donut products,
and to fry yeast-raised donut products. It is not
designed to cut or fry any other products.

The Mark IX uses electrical elements to heat
shortening in its kettle. The Donut Robot Mark
IX produces only 82 dB(A) of equivalent
continuous A-weighted sound pressure at work
stations. This has been determined during a dry
run of the machine, using a Bruel & Kjaer sound
level meter, type 2236.

The Mark IX is meant to be used on a flat,
stationary table or countertop, with the operator
standing opposite the heater head of the machine.
The operator must work safely at all times and
read this manual and follow its instructions and
warnings.

Study the instructions and warnings in this
manual carefully. A thorough understanding of
how to install, maintain, and safely operate the
Donut Robot Mark IX will prevent production
delays and injuries.

To use the Mark IX safely, heed the following
warnings and all other warnings that appear in
this manual:

 Make sure the machine is secured to the

work surface. Doing so will prevent the
machine from moving or falling, which
could cause serious injury.

 Never let water and hot shortening come

in contact with each other. Moisture
causes hot shortening to spatter, which
may cause serious burns.

could cause someone to slip on the floor
and be seriously injured.

 Hot shortening can cause serious burns.

Make sure that the system and the
shortening are cool before attempting
any adjustment, repair, disassembly, or
cleaning.

 To avoid electrocution or other injury,

unplug the machine before attempting
any adjustment, repair, disassembly, or
cleaning.

 To avoid damaging the machine, never

use force to assemble, disassemble,
operate, clean, or maintain it.

 Be careful never to get shortening,

water, or other materials on the floor. If
anything does get spilled on the floor,
mop it up immediately. Materials on the
floor can cause people to slip or fall,
resulting in serious injury or loss of life.

 To prevent unintentional startup and

possible fire, unplug the machine if there
is a local power outage. When the
power is restored, it is safe to plug the
machine in again.

 To avoid electrocution, make sure that

all electrical cords are not frayed or
cracked and that they do not pass
through any water or shortening.

 Make sure that all electrical cords are

routed so that no one will trip over them.

 Do not overfill the kettle with

shortening. If shortening overflows the
kettle, it could cause serious burns or

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iv MN-1052EN Donut Robot Mark IX OM

1 Operation

This section describes how to make regular cake
donuts, yeast-raised donuts, French crullers, and
French cake donuts. The Donut Robot Mark IX
can also produce other types of donuts,
depending on the plungers or attachments used.

For general information on donut production,
refer to Section 5, “Donut-Making Helps.”

Read each step completely before doing what it
tells you to do.

Making Cake and French
Donuts

To make cake donuts, French crullers, and
French cake donuts:

1. Install the necessary parts of the machine:
a. Install the swing column.
b. Connect the swing connecting rod.
c. Install the cutter head.

Put shortening in the kettle using one of
these methods:

 Pre-melt shortening in a pan on the stove

and carefully pour it into the kettle.

 Use the optional EZ Melt to melt

shortening and transfer it to the kettle.
See your EZ Melt manual.

WARNING

Hot shortening causes severe burns.

 Put solid shortening into the kettle,

packing it tightly around the elements
and bulbs.

WARNING

Air spaces can cause the shortening to

overheat and catch on fire.

d. Install a cylinder of the desired size on

the hopper.

e. Install a plunger of the desired size in the

hopper.

f. Mount the hopper and the plunger on the

cutter head assembly.

2. When the shortening reaches the correct
frying temperature, it should reach the
middle of the flight bars.

Shortening expands as it increases in
temperature. This means that unless the
shortening is at frying temperature when you
put it in the kettle, you should put it in
gradually. Let the shortening in the kettle
heat up before you add more.

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Donut Robot Mark IX OM MN-1052EN 1

3. Turn the heating element on by turning the
thermostat knob to the desired temperature.
Two pilot lights will come on. The one on
top of the heater head indicates that the
heating element has been turned on (that the
thermostat is set above 200F/93C). The
one on the front of the heater head indicates
that the shortening has not yet reached the
desired temperature. This light will go out if
the high temperature limit control breaks the
circuit.

Note: If the high temperature limit control
does break the circuit, push the red reset
button on the back of the heater head.

4. Wait for the shortening to reach the desired
temperature. When it does, the pilot light on

the front of the heater head will go out. DO
NOT run the conveyor until all the
shortening has melted.

5. If you are using the optional Shortening
Reserve Tank, fill it with shortening. Then
position it on the conveyor side panels either
ahead of or behind the turner, but not above
it. The heat of the fryer will melt the
shortening in the tank.

6. Disengage the swing connecting rod from
the swing column throw arm and swing the
hopper away from over the fryer.

7. Adjust the size selector dial on the cutter
head’s crankshaft assembly. This dial
regulates the donut weight. The higher the
setting, the larger the donuts will be. Adjust
the dial setting as follows:

a. Unscrew the dial lock nut 1/2 turn.
b. Turn the dial to the desired position, as

indicated by the marks on the crank
plate.

c. Tighten the dial in place with the lock

nut. Tighten it using your fingers only.

8. Put dough into the hopper. Prime the hopper
to expel any air that may be trapped in the
bottom of it. To prime the hopper:

a. Hold a mixing bowl under the cutter.

11. Using the switch on the heater head, select
the number of cutsone or twoyou want to
make during each swing cycle of the hopper.

12. Turn on the cutter using the power switch on
the cutter head.

13. Turn on the conveyor drive using the power
switch on the heater head.

Note: If the conveyor becomes jammed, a
warning buzzer will sound about a minute
later and stop when the conveyor is turned
off. The conveyor drive is impedance­protected so it will not burn out due to
jamming.

WARNING

If the conveyor becomes jammed: 1. Turn

off the conveyor drive and the heater. 2.

Allow the system to cool down. HOT

SHORTENING IS DANGEROUS.

3. Determine the cause of the jamming.

4. Clear it. 5. Restart the system.

14. Continue adding shortening to the kettle to
maintain the proper shortening level (see
step 2). There are three ways to do this:

 Melt some shortening in a pan on the

stove and carefully pour it into the kettle.

b. Hold down the prime switch on the

cutter head and run the cutter until it has
dropped two or three donuts into the
bowl.

Note: Holding down the prime switch

causes the cutter to run continuously
without the normal delay between cuts.

c. Put the dough in the bowl back in the

hopper.

9. Return the hopper into position over the
fryer and reconnect the swing connecting
rod to the swing column throw arm.

10. Choose the appropriate fry time for your
product using the fry time control knob on
the heater head.

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2 MN-1052EN Donut Robot Mark IX OM

 If you are using the optional EZ Melt,

transfer more shortening from it. See
your EZ Melt manual.

 If you are using the optional Shortening

Reserve Tank, push open the supply
valve.

15. Continue adding dough to the hopper as
needed. You can add dough to the hopper
without priming it again as long as it does
not become empty. If the hopper does
become empty, you must prime it again.

16. When you fill the hopper for the last time,
you will want to use all of the dough in the
hopper. To do so, push the dough to the
bottom of the hopper using a rubber scraper

or spatula. Be careful not to jam the scraper
in the donut cutter.

WARNING

To avoid injury, never put your hand in or

under the hopper while the machine is on.

Making Yeast-Raised
Donuts

1. Remove the hopper and the plunger, the
cutter head, and the swing column, if they
are installed.

2. Put shortening in the kettle. When the
shortening reaches the correct frying
temperature, it should reach the middle of
the flight bars.

Shortening expands as it increases in
temperature. This means that unless the
shortening is at frying temperature when you
put it in the kettle, you should put it in
gradually. Let the shortening in the kettle
heat up before you add more.

WARNING

Air spaces can cause the shortening to

overheat and catch on fire.

3. Turn the heating element on by turning the
thermostat knob to the desired temperature.
Two pilot lights will come on. The one on
top of the heater head indicates that the
heating element has been turned on (that the
thermostat is set above 200F/93C). The
one on the front of the heater head indicates
that the shortening has not yet reached the
desired temperature. This light will go out if
the high temperature limit control breaks the
circuit.

Note: If the high temperature limit control

does break the circuit, push the red reset
button on the back of the heater head.

4. Wait for the shortening to reach the desired
temperature. When it does, the pilot light on
the front of the heater head will go out. DO
NOT run the conveyor until all the
shortening has melted.

There are three ways to put shortening in the
kettle before you begin frying donuts:

 Pre-melt shortening in a pan on the stove

and carefully pour it into the kettle.

 Use the optional EZ Melt to melt

shortening and transfer it to the kettle.
See your EZ Melt manual.

WARNING

Hot shortening causes severe burns.

 Put solid shortening into the kettle,

packing it tightly around the elements
and bulbs.

5. If you are using the optional Shortening
Reserve Tank, fill it with shortening. Then
position it on the conveyor side panels either
ahead of or behind the turner, but not above
it. The heat of the fryer will melt the
shortening in the tank.

6. Install your Feed Table and load proof cloths
on it. Refer to Section 4, “Related
Products,” for complete installation and
operation instructions for the Feed Table.

7. Choose the appropriate fry time for your
product using the fry time control knob on
the heater head.

8. Turn on the conveyor drive using the power
switch on the heater head.

Note: If the conveyor becomes jammed, a
warning buzzer will sound about a minute
later and stop when the conveyor is turned
off. The conveyor drive is impedance-

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Donut Robot Mark IX OM MN-1052EN 3

protected so it will not burn out due to
jamming.

WARNING

If the conveyor becomes jammed: 1. Turn

off the conveyor drive and the heater. 2.

Allow the system to cool down. HOT

SHORTENING IS DANGEROUS.

3. Determine the cause of the jamming.

4. Clear it. 5. Restart the system.

9. Continue adding shortening to the kettle to
maintain the proper shortening level (see
step 2). There are three ways to do this:

 Melt some shortening in a pan on the

stove and carefully pour it into the kettle.

 If you are using the optional EZ Melt,

transfer more shortening from it. See
your EZ Melt manual.

 If you are using the optional Shortening

Reserve Tank, push open the supply
valve.

10. Continue loading proof cloths onto the Feed
Table as needed.

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4 MN-1052EN Donut Robot Mark IX OM

2 Cleaning

WARNING

Thoroughly clean and dry the floor if

shortening, water, or other materials are

spilled. Materials spilled on the floor can

cause serious injury or loss of life.

WARNING

To avoid electrocuting yourself or

damaging the machine, never allow water,

steam, shortening, cleaning solution, or any

other liquid to enter the heater head or

cutter head assemblies.

Cleaning the Plunger,
Hopper, and Cylinder

You must clean the hopper, plunger, and cylinder
daily, or after each use. Follow these general
guidelines:

 Use household dishwashing detergent.

Do not use strong alkali cleaners such as
lye, soda ash, or trisodium phosphate, as
these discolor and corrode aluminum.

 Wash, dry, and lubricate parts

thoroughly to prevent rusting.

 When washing parts by hand, wash each

part separately; do not put any other
utensil or dish in the sink with the part
being washed.

To clean the plunger, hopper, and cylinder:

1. Unplug the cutter head power cord.

2. Loosen the thumb nut that holds the hopper
on the cutter head.

3. Remove the plunger and the hopper.

4. Loosen the plunger thumb screw.

5. Remove the plunger from the hopper.

6. Remove the cylinder from the hopper:
a. Turn the hopper upside down.
b. Turn the cylinder 1/4 turn.
c. Pull the cylinder up and out of the

hopper.

7. Pre-soak the parts, if necessary, to loosen
stubborn or dried-on deposits.

8. Wash the plunger, hopper, and cylinder
separately in hot water and a detergent
recommended for aluminum. Use a non­scratching plastic scouring cloth to remove
soil and restore luster.

9. Rinse the plunger, hopper, and cylinder
separately in clear, hot water (170-190F/
77-88C).

10. Dry each part completely.

11. Dip the plunger and the cylinder in mineral
oil or liquid shortening to prevent rust and
sticking.

12. Wipe the cutter head assembly with a soft
cloth dampened with hot water and an
appropriate cleaner. Wipe it with another
damp cloth to remove the cleaner. Wipe it
dry.

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Donut Robot Mark IX OM MN-1052EN 5

WARNING

To avoid electrocuting yourself or

damaging the machine, never immerse the

cutter head.

Cleaning the Conveyor and
the Kettle

There are four basic steps to cleaning the
conveyor and the fryer kettle: removing the
shortening, washing, rinsing, and drying. You
must perform all four steps and perform them in
the order listed.

Removing the Shortening

WARNING

conveyor and lay it across the top of the
kettle. Lift the other end of the conveyor
and do the same with the other piece of
wood. The conveyor will now be resting
on the two pieces of wood. Let the
shortening drain off of the conveyor and
into the kettle. See Figure 2-1.

Figure 2-1. Draining the Shortening off of

the Conveyor.

6. If you want to clean the turner assembly,
remove and clean it as follows:

To avoid being burned, electrocuted, or
otherwise injured, disconnect the machine
from the power source before cleaning the

fryer.

1. Disconnect the machine from the power
source.

2. Let the shortening cool to 100F/38C.

3. Unplug the cutter head power cord.

4. Lift the cutter head off the swing column.

5. Remove the conveyor assembly as follows:
a. Obtain two pieces of wood, at least 1” x

1” x 15” (2.5 cm x 2.5 cm x 38 cm).
b. Lift off the swing connecting rod.
c. Lift the conveyor assembly from the

conveyor locating pin and pull it away

from the heater head to disengage the

main drive shaft coupling from the

conveyor drive coupling.
d. Lift the outfeed end of the conveyor.

Slide one piece of wood under the

a. Move the flight bars of the conveyor

until the turner is in the middle of a

flight pocket.
b. Swing the turner cam weight up.
c. Lift up and pull out on the turner cam

assembly. See Figure 2-2.

Figure 2-2. Removing the Turner Cam

Assembly.

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6 MN-1052EN Donut Robot Mark IX OM

d. Lift out the turner assembly. See

Figure 2-3.

CAUTION

If the drop plate is scratched, donuts will

stick to it. To prevent this from happening,

always wipe the drop plate in the direction

of the grain in the metal, which runs

parallel to the length of the conveyor, and

never use abrasive cleaners.

Figure 2-3. Removing the Turner Assembly.

e. Wash the turner cam assembly and

turner assembly using mild detergent and
warm water.

f. Rinse the turner cam assembly and

turner assembly in clear water.

g. Dry these parts thoroughly.

WARNING

All parts must be dried thoroughly.

Moisture causes hot shortening to spatter,

which may cause serious injury.

7. If you want to clean the drop plate, remove
it by lifting its forward end and sliding it
toward the rear of the conveyor. (See Figure
2-4.) Wipe the drop plate with a damp cloth.

Figure 2-4. Removing the Drop Plate.

8. After the shortening has drained off of the
conveyor assembly, set the conveyor
assembly aside.

9. Check again to see that the shortening in the
kettle has cooled to 100F/38C.

10. Remove the shortening from the kettle. You
may drain it out (if your kettle has the
optional drain), siphon it out, or pour it out.

You may transfer the shortening to a

Belshaw EZ Melt or to one or more large
metal buckets. If you use buckets, and you
want to re-use the shortening, either place a
filter over each bucket, or be careful not to
disturb the sediment that has accumulated on
the bottom of the kettle.

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Donut Robot Mark IX OM MN-1052EN 7

WARNING

Do not use plastic buckets. If the

shortening is not cool enough, the buckets

will melt; possibly causing you to be

burned, and causing shortening to get on

the floor.

WARNING

Do not allow the shortening to overflow the

buckets. Shortening will get on the floor,

and if the shortening is not cool enough,

you may be burned.

WARNING

Thoroughly clean and dry the floor if

shortening is spilled. Shortening on the

floor can cause serious injury or loss of life.

to pitcher to scoop as much shortening as
you can into an EZ Melt or one or more
metal buckets. Then lift the kettle out of
the fryer case and carefully pour the
remaining shortening into an EZ Melt or
a large metal bucket.

11. Return the kettle to the fryer case, if you
have removed it, and tilt the heater head
assembly down.

12. Brush off any carbon that has accumulated
on the heating element. Accumulated
carbon can cause corrosion and ineffective
heating.

13. Tilt the heater head assembly back, raising
the heating element out of the kettle.

14. Dispose of the carbon and other sediment
using one of these methods:

If your kettle has the optional drain, put a

bucket under the drain, and scrape the
carbon and other sediment through the drain,
using a non-abrasive, non-metallic spatula.

If your kettle does not have the optional

drain, do the following:

 Draining

Put an EZ Melt or a metal bucket under
the drain. Slowly open the drain valve.
If you are using a bucket and the bucket
becomes full, close the drain valve, put
another bucket under the drain, and
resume draining.

 Siphoning

Put an EZ Melt or a metal bucket under a
Belshaw Filter Flo Siphon. (Refer to the
Filter Flo Siphon instructions in Section

4.) If you are using a bucket and the
bucket becomes full, stop the siphon, put
another bucket under the siphon, and
resume siphoning.

 Pouring

Tilt the heater head assembly back,
raising the heating element out of the
kettle. Use a small saucepan or a metal

a. Lift the kettle out of the fryer case.
b. Use a non-abrasive, non-metallic spatula

to scrape the carbon and other sediment

out of the kettle.
c. Dry the outside of the kettle.
d. Put the kettle back in the fryer case.

15. Tilt the heater head assembly down.

16. Put the drop plate, turner cam assembly, and
turner assembly back on the conveyor
assembly.

17. Install the conveyor assembly.

18. If your kettle has the optional drain, close
the drain valve.

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8 MN-1052EN Donut Robot Mark IX OM

Washing

1. Pour hot water into the kettle, up to the
normal level of the shortening. Add about 2
oz/59 ml of trisodium phosphate or other
appropriate cleaner.

2. Connect the machine to the power source.
Heat the solution to 200F/93C. Turn on
the conveyor. Keep the solution at this
temperature for 15-20 minutes.

3. Turn off the conveyor and scrub the soiled
parts while the solution is under heat. Do
not use any abrasive cleaners or scrapers.

4. Turn off the heater and disconnect the
machine from the power source. Allow the
cleaning solution to cool to 100F/38C.

5. Remove the conveyor and tilt the heater
head back as you did before.

6. Remove the cleaning solution from the
kettle, transfering it to one or more large
metal buckets. You may drain it out (if your
kettle has the optional drain), siphon it out,
or pour it out.

WARNING

Do not use plastic buckets. If the cleaning

solution is not cool enough, the buckets will

melt; possibly causing you to be burned,

and causing cleaning solution to get on the

floor.

WARNING

Thoroughly clean and dry the floor if

cleaning solution is spilled. Liquid on the

floor can cause serious injury or loss of life.

 Draining

Put a large metal bucket under the drain.
Slowly open the drain valve. If the
bucket becomes full, close the drain
valve, put another bucket under the
drain, and resume draining.

 Siphoning

Put a large metal bucket under a
Belshaw Filter Flo Siphon. Remove the
filter from the siphon. (Refer to the
Filter Flo Siphon instructions in Section

4.) If the bucket becomes full, stop the
siphon, put another bucket under the
siphon, and resume siphoning.

 Pouring

Tilt the heater head assembly back,
raising the heating element out of the
kettle. Use a small saucepan or a metal
to pitcher to scoop as much cleaning
solution as you can into one or more
metal buckets. Then lift the kettle out of
the fryer case and carefully pour the
remaining solution into a large metal
bucket.

Carefully carry the buckets to the sink and
slowly pour the solution into the sink.

WARNING

Do not allow the cleaning solution to

overflow the buckets. Cleaning solution

will get on the floor, and if the solution is

not cool enough, you may be burned.

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Donut Robot Mark IX OM MN-1052EN 9

7. Lift the kettle out of the fryer case, if you
have not done so already.

8. Rinse the kettle thoroughly and dry it on the
outside.

9. Install the kettle, tilt the heater head
assembly down, and install the conveyor
assembly as before.

10. If your kettle has the optional drain, close
the drain valve.

Rinsing

1. Pour clean water into the kettle, up to the
normal level of the shortening.

2. Connect the machine to the power source.
Heat the water to 200F/93C.

3. Run the conveyor for 5-10 minutes.

4. Turn off the heater and disconnect the
machine from the power source. Allow the
water to cool to 100F/38C.

5. Lift the conveyor assembly out of the fryer
case. Tilt the heater head assembly back.

6. Remove the water from the kettle,
transfering it to one or more large metal
buckets. You may drain it out (if your kettle
has the optional drain), siphon it out, or pour
it out.

WARNING

Slowly open the drain valve. If the
bucket becomes full, close the drain
valve, put another bucket under the
drain, and resume draining.

 Siphoning

Put a large metal bucket under a
Belshaw Filter Flo Siphon. Remove the
filter from the siphon. (Refer to the
Filter Flo Siphon instructions in Section

4.) If the bucket becomes full, stop the
siphon, put another bucket under the
siphon, and resume siphoning.

 Pouring

Tilt the heater head assembly back,
raising the heating element out of the
kettle. Use a small saucepan or a metal
to pitcher to scoop as much water as you
can into one or more metal buckets.
Then lift the kettle out of the fryer case
and carefully pour the remaining water
into a large metal bucket.

Do not use plastic buckets. If the water is

not cool enough, the buckets will melt;

possibly causing you to be burned, and

causing water to get on the floor.

WARNING

Do not allow the water to overflow the

buckets. Water will get on the floor, and if

the water is not cool enough, you may be

burned.

WARNING

Thoroughly clean and dry the floor if water

is spilled. Liquid on the floor can cause

serious injury or loss of life.

Carefully carry the buckets to the sink and
slowly pour the water into the sink.

Drying

1. Thoroughly dry all parts, including the
conveyor, the heating element(s), and the
inside of the kettle.

WARNING

All parts must be dried thoroughly.

Moisture causes hot shortening to spatter,

which may cause serious injury.

2. Assemble the Donut Robot as before.

3. If your kettle has the optional drain, close
the drain valve.

 Draining

Put a large metal bucket under the drain.

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10 MN-1052EN Donut Robot Mark IX OM

3 Maintenance

WARNING

To avoid being burned, electrocuted, or

otherwise injured, always unplug the

machine and allow it to cool down before

performing any maintenance.

Taking Care of the Plunger,
Hopper, and Cylinder

The plunger, hopper, and cylinder of your Donut
Robot are precision instruments. If you take
good care of them, they will perform well for
years. Follow these guidelines:

 Clean these parts only in the manner

explained in this manual.

 Handle these parts with care. Avoid

dropping them on hard surfaces.

 Do not force the machine if it becomes

jammed. To avoid damaging the
plunger, disassemble the machine and
remove any obstructions.

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Donut Robot Mark IX OM MN-1052EN 11

4 Related Products

This section contains information about the
following products which you might use with
your Donut Robot:

 Feed Table
 Roto Cooler
 Icing Finishing Tree and Roto Cooler
 Sugaring Tray and Roto Cooler
 Filter Flo Siphon
 Shortening Reserve Tank

See the sales literature in the back of this manual
for information about these and other products.

FT-42 Feed Table

SPECIFICATIONS

Dimensions Shipping

Weight

L = 52”/132 cm

W = 19”/48 cm

H = 11 3/4”/30

cm

73 lb/33.1 kg 115 V

Electrical Data Construction Standard

1 Phase

50 or 60 Hz

Stainless steel,
nickel-plated mild
steel, and aluminum
alloys.

Equipment

Complete conveyor
assembly, including
drive system and
controls. Does not
include proofing
cloths or proofing
boards.

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12 MN-1052EN Donut Robot Mark IX OM

Figure 4-1. FT-42 Feed Table.

The FT-42 Feed Table is designed to supply
proofed yeast-raised donuts to the Donut Robot.
It is meant to be used on a flat, stationary table or
countertop. The operator is expected to read and
follow these instructions.

Installation

1. Unplug the cutter head power cord of your
Donut Robot.

2. Release the plunger from the cutter head.

3. Unscrew and lift off the hopper assembly.

4. Lift off the cutter head and swing column
assemblies.

5. Lift the outfeed end of the Feed Table and
set the brace under the trip shelf over the
edge of the kettle.

WARNING

To avoid injury, make sure that the Feed

Table is turned off before proceeding.

Operation

1. Test to make sure that the automatic timing
for the Feed Table is working. To do this:

a. Turn on the Donut Robot’s conveyor

drive.

b. Turn on the Feed Table’s conveyor

drive.

The Feed Table should receive a signal

from the Donut Robot, move forward the
distance needed to supply one pocket of
donuts, and then stop until it receives the
next signal.

2. Proof your donuts on the proofing cloths
from the Feed Table.

3. Put a proofing board, with a proofing cloth
on it, on the Feed Table.

4. Press the prime switch on the power head
assembly. The hooks on the Feed Table will
grab the proofing cloth off of the proofing
board. Allow the cloth to advance to the
front of the Feed Table.

6. Plug the Feed Table power cord into the
outlet on the end of the heater head.

7. Set the Donut Robot to cut one cut per
pocket.

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Donut Robot Mark IX OM MN-1052EN 13

5. Release the prime switch and turn on the
main power. Remove the proofing board.

When the Feed Table is on, the Feed Table

automatically advances donuts when the
Donut Robot is ready to accept them. After
the donuts go into the fryer, the proofing
cloths are carried underneath the Feed Table
and fall onto the work surface. If you desire,

you may place a pan underneath the Feed
Table to receive the used proofing cloths.

6. Continue putting proofing cloths on the Feed
Table.

CAUTION

To avoid damaging the machine, never use

force to assemble or operate the Feed

Table.

Maintenance and Cleaning

After Each Use

Use a soft, damp cloth for cleaning.

WARNING

To avoid electrocuting yourself or

damaging the machine, never allow any

liquid to enter the power head.

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14 MN-1052EN Donut Robot Mark IX OM

Roto Cooler

SPECIFICATIONS

Dimensions Shipping

Weight

Dia.=24”/61 cm
H=6-5/8”/17 cm

16 lb/7.3 kg 120 V

Electrical Data Construction Standard

Equipment

1 Phase

50 or 60 Hz

Basket: High-density
polyethylene. Base:
Spun, polished,
heavy-gauge
aluminum.

To use the Roto Cooler:

1. Place the Roto Cooler near the outfeed end
of the Donut Robot so donuts will fall into
it.

2. Connect the Roto Cooler power cord to the
120 V outlet on back of the Donut Robot’s
heater head.

3. Turn on the Roto Cooler. It will rotate and
receive donuts. Remove cooled donuts from
the Roto Cooler as needed.

Basket and turntable
base with power cord
and motor.

4. When you are finished using the Roto
Cooler, turn it off and unplug it.

WARNING

Figure 4-2. Roto Cooler.

The Roto Cooler is designed to catch and cool
donuts as they drop from the outfeed end of the
Donut Robot. It is meant to be used on a flat,
stationary table or countertop. The operator is
expected to read and follow these instructions.

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Donut Robot Mark IX OM MN-1052EN 15

5. Clean the Roto Cooler using soap and water

To avoid electrocuting yourself or

damaging the machine, never submerge the

base of the Roto Cooler.

and a non-abrasive cloth or scrubber.

Icing Finishing Tree and Roto Cooler

SPECIFICATIONS

Dimensions Shipping

Weight

Dia.=24”/61 cm

28 lb/12.7 kg 120 V

H=32”/81 cm

Electrical Data Construction Standard

Equipment

1 Phase

Trays: Heavy-gauge
aluminum. Basket:
High-density

Power turntable and
four trays, three of
which have dividers.

polyethylene. Base:

50 or 60 Hz

Spun, polished,
heavy-gauge
aluminum.

which donuts can be dipped. The operator is
expected to read and follow these instructions.

To use the Roto Cooler and the Icing Finishing
Tree:

1. Attach the Icing Finishing Tree to the Roto
Cooler. Fill the trays with toppings.

2. Install and operate the Roto Cooler as
explained in the previous section.

3. Decorate the donuts with the toppings in the
trays.

4. When you are finished using the Roto
Cooler and the Icing Finishing Tree, turn off
the Roto Cooler and unplug it.

WARNING

Figure 4-3. Icing Finishing Tree with Roto

Cooler.

The Roto Cooler is designed to catch and cool

5. Clean the trays of the Roto Cooler and the

donuts as they drop from the outfeed end of the
Donut Robot. It is meant to be used on a flat,
stationary table or countertop.

The Icing Finishing Tree, which mounts on the
Roto Cooler, is designed to hold toppings in

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16 MN-1052EN Donut Robot Mark IX OM

To avoid electrocuting yourself or

damaging the machine, never submerge the

base of the Roto Cooler.

Icing Finishing Tree using soap and water
and a non-abrasive cloth or scrubber.

Sugaring Tray and Roto Cooler

SPECIFICATIONS

Dimensions Shipping

Weight

Dia.=17-1/4”/44

cm

H=6-5/8”/17 cm

16 lb/7.3 kg

Electrical Data Construction Standard

Equipment

120 V

1 Phase

50 or 60 Hz

Spun, polished,
heavy-gauge
aluminum.

To use the Sugaring Tray and Roto Cooler base:

1. Put sugar, powdered sugar, or cinnamon­sugar in the tray.

2. Place the Sugaring Tray and Roto Cooler
base near the outfeed end of the Donut
Robot so donuts will fall into the tray.

3. Connect the Roto Cooler power cord to the
120 V outlet on back of the Donut Robot’s
heater head.

4. Turn on the Roto Cooler base. The Sugaring
Tray will rotate and receive donuts.

Power turntable with
sugar tray.

Figure 4-4. Sugaring Tray.

The Roto Cooler base makes the Sugaring Tray
rotate. It is meant to be used on a flat, stationary
table or countertop.

The Sugaring Tray is designed to catch donuts as
they drop from the outfeed end of the Donut
Robot, and to hold toppings in which donuts can
be dipped. The operator is expected to read and
follow these instructions.

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Donut Robot Mark IX OM MN-1052EN 17

5. Coat the donuts with the topping in the tray.

6. When you are finished using the Sugaring
Tray, turn off and unplug the Roto Cooler
base.

WARNING

To avoid electrocuting yourself or

damaging the machine, never submerge the

base of the Roto Cooler.

7. Clean the Sugaring Tray using soap and
water and a non-abrasive cloth or scrubber.

Filter Flo Siphon

SPECIFICATIONS

Dimensions Shipping Weight Construction Standard Equipment

H=16”/41 cm

Dia.=6-1/4”/16

cm

3 lb/1.4 kg Siphon tube and valve: nickel-plated

steel. Handle: wood. Filter ring:
powder-coated. Filters: flannel.
Mounting brackets: aluminum alloy.

Siphon assembly
including valve, filter,
filter ring, and clamp.

bulb

The Filter Flo Siphon is designed to drain and
filter shortening from the kettle of the Donut
Robot. The operator is expected to read and
follow these instructions.

mounting bracket

Installation

1. Let the shortening cool to 100F/38C.

handle

siphon tube

filter mounting
bracket

valve
filter

Figure 4-5. Filter Flo Siphon.

WARNING

Hot shortening can cause serious burns.

Never touch hot shortening. Never wear

shorts while using the Filter Flo Siphon.

2. Place the mounting bracket, with the siphon
tube in it, on the lip of the kettle. You may
place it on the infeed end of the kettle, or on
the front side of the kettle. If you place it on
the front side, you must disconnect the
swing connecting rod from the throw arm
and move it out of the way.

3. Position the opening of the siphon tube near
the bottom of the kettle.

4. Tighten the thumb screw in the mounting
bracket.

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18 MN-1052EN Donut Robot Mark IX OM

5. Attach the filter assembly to the lower part
of the siphon tube, as shown in Figure 4-7.
To do this:

a. Slide the opening in the filter mounting

bracket around the siphon tube.

b. Adjust the filter mounting bracket

vertically to ensure that the filter does
not touch the valve assembly.

c. Tighten the screw that holds the filter

mounting bracket to the siphon tube.

d. Tighten the screw that holds the filter

retaining ring to the filter mounting
bracket.

WARNING

Make sure that both screw in the filter
assembly are tight. If they are not, the

filter assembly might slide off of the siphon

tube during operation, causing shortening

to splatter.

6. Place a five-gallon metal container under the
filter.

Operation

1. Compress the bulb quickly and release it
quickly. Do this only once. Shortening
should flow into the container.

CAUTION

Do not compress the bulb more than once.

Doing so could allow hot shortening to get

into the bulb, damaging your equipment.

2. Watch the container as the shortening flows
into it. If the shortening rises to within 2”/
5 cm of the top of the container, do the
following:

a. With one hand, hold the siphon by the

handle. With the other hand, loosen the
thumb screw that holds the siphon
assembly to the mounting bracket on the
lip of the kettle.

b. Slowly lift the siphon assembly so its

opening is above the shortening. Do not
remove it from the mounting bracket.

c. Tighten the thumb screw.

WARNING

Do not use a plastic container. Hot

shortening could melt the container,

possibly burning you and getting

shortening on the floor. Shortening on the

floor could cause you to slip or fall,

resulting in injury or even death.

d. When the shortening stops flowing and

the valve closes, move the container out
from under the filter.

e. Place another five-gallon metal container

under the filter.

f. With one hand, hold the siphon by the

handle. With the other hand, loosen the
thumb screw that holds the siphon
assembly to the mounting bracket on the
lip of the kettle.

g. Slowly lower the siphon assembly so its

opening is near the bottom of the kettle.
h. Tighten the thumb screw.
i. Restart the siphon, as explained in step

1.

j. Continue watching the container and

repeat the above procedure as needed.

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Donut Robot Mark IX OM MN-1052EN 19

WARNING

If you allow shortening to overflow the

container, the shortening could burn you,

and it will get on the floor, possibly causing

slips, falls, injury, or even death. If

shortening does get on the floor, thoroughly

clean and dry the floor right away.

3. When the shortening stops flowing, tilt up
the side of the kettle opposite the siphon.
Place a wedge under the side of the kettle to
hold it up. The remaining shortening will
now flow toward the siphon.

4. Set aside the container of shortening.

5. Remove the filter assembly.

6. Place a different container under the valve
assembly and start the siphon again. Drain
the remaining shortening and discard it; it
will be full of sediment.

Cleaning

1. Remove the siphon from the Donut Robot.

2. Squeeze the bulb several times to expel
shortening from the siphon.

3. Wipe the siphon clean and hang it with the
bulb side up so any remaining shortening
will drain. Place a pan under the siphon to
collect the shortening.

4. Rinse the filter bag and hang it to dry. You
may launder it as needed.

WARNING

After washing, be sure the Filter Flo

Siphon is completely dry before using it

again. Moisture will cause hot shortening

to spatter, which may cause serious injury.

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20 MN-1052EN Donut Robot Mark IX OM

Shortening Reserve Tank

SPECIFICATIONS

Dimensions Shipping

Weight

L=11”/28 cm

W=5-1/2”/14 cm

D=4”/10 cm

The Shortening Reserve Tank is designed to
supply melted shortening to the kettle of the
Donut Robot. The operator is expected to read
and follow these instructions.

To use the Shortening Reserve Tank:

1. Position the Shortening Reserve Tank on the
conveyor side panels. Make sure that you
do not position it above the donut turner.

4 lb/2 kg 4 lb/2 kg

Capacity Construction Standard

shortening

WARNING

Be careful if you put hot shortening into

the tank. Hot shortening can cause serious

burns.

Equipment

Nickel-plated steel
tank and non­corrosive self-closing
valve.

2. Place shortening in the tank.

3. Turn on the Donut Robot. The heat of the
fryer will melt the shortening in the tank.

4. To supply shortening to the fryer, open the
valve by pushing down on the valve
assembly.

5. When you are done making donuts, drain the
remaining shortening into the fryer.

6. When the shortening and equipment have
cooled completely, remove the Shortening
Reserve Tank and wash it.

Shortening reserve
tank and valve
assembly.

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Donut Robot Mark IX OM MN-1052EN 21

5 Donut-Making Helps

Tips on Making Quality
Cake Donuts

 Use the correct batter temperature.
In general, the correct batter temperature is

75-80F/24-27C. Check the mix
manufacturer’s instructions, as the
recommended temperature range may vary.

If the batter is too warm, the donuts will lack

volume and may “ring out” or be misshapen.
If the batter is too cold, the donuts will stay
under the shortening too long, fry too
slowly, and crack open or ball up. They
may also absorb excess shortening and lose
volume.

 Use the correct floor time.
A floor time of 10 minutes between mixing

and cutting allows the baking powder to
react with the water. This helps the donuts
attain the proper volume and absorb the
proper amount of shortening.

If the floor time exceeds 30 minutes, the mix

will gas off, the donuts will lose volume and
shape and will absorb too much shortening.

If the shortening is too cold, the donuts will
spread too rapidly, will form large rings, will
tend to crack open, will be too light in
appearance, and will absorb too much
shortening.

 Maintain the proper shortening level. We

recommend a distance of 1 1/4” between the
cutter and the shortening.

If the shortening is too deep, the donuts may

not turn over when they reach the turner,
causing them to cook unevenly.

If the shortening is too shallow (too far

below the cutter), the donuts may not drop
flat, may turn over while submerging and
surfacing, and may become irregular,
cracked, or rough-crusted.

 Ensure that the donuts absorb the right

amount of shortening.

Donuts should absorb 1-1/2 to 3 oz/42 to

85 g of shortening per dozen, depending on
their weight. You can achieve proper
absorption by following tips 1-3.

 If the donuts do not absorb enough

shortening, they will not keep well.

 Use the correct frying temperature.
The correct shortening temperature for

frying is 370-380F/188-193C.

If the shortening is too hot, the donuts will

fry too quickly on the outside and will lose
volume. The donuts may also become dense
inside.

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22 MN-1052EN Donut Robot Mark IX OM

If they absorb too much shortening, they

will lose volume and may become
misshapen. If this happens, follow tips 1-3,
mix the batter a little longer than usual, turn
the donuts as soon as they become golden
brown, and turn the donuts only once.

Calculating Water Temperature

The following is an example of how to calculate the
correct water temperature to use. You must use your own
room temperature, dry mix temperature, desired batter
temperature, and, if you are making yeast-raised donuts,
estimated temperature increase during mixing.

Cake Donuts Yeast-Raised Donuts

Room temperature 72 22.2 72 22.2

Dry mix temperature +70 +21.1 +70 +21.1

Desired batter temperature 75 23.9 80 26.7

Desired water temp. for cake donuts

Temperature increase during mixing (average: 30F/17C)

Desired water temperature for yeast-raised donuts

Total A

Total B
Total B

-Total A

x3

F

142 43.3 142 43.3

225 71.7 240 80.1
225 71.7 240 80.1

-142 -43.3 -142 -43.3

83F

x3 x3 x3

Figure from above 98 36.8

C

28.4C

98 36.8

F



-30 -17

68F

C



19.8C

Ratios of Plunger Sizes to
Donut Weights

The weights given are for donuts without icings
or other toppings. They are provided for
reference only, as weights vary according to the
density of the batter.

Plunger Size

1” 5-8 oz/142-227 g
1 7/16” 10-17 oz/283-482 g
1 9/16” 14-21 oz/397-595 g

1 13/16” 19-23 oz/539-652 g

Donut Weight per
Dozen

Temperature Conversion

To convert temperatures from Fahrenheit to
Celsius, subtract 32 from F and divide the result
by 1.8. For example, 212F-32/1.8 = 100C. To
convert temperatures from Celsius to Fahrenheit,
multiply C by 1.8 and add 32 to the result. For
example, (100C x 1.8) + 32 = 212F.

F C F C

55 12.8 340 171.1
60 15.6 345 173.9
65 18.3 350 176.7
70 21.2 355 179.4
75 23.9 360 182.2

80 26.7 365 185.0
325 162.8 370 187.8
330 165.6 375 190.6
335 168.3 380 193.3

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Donut Robot Mark IX OM MN-1052EN 23

Donut Robot



Mark IX

Technical Supplement

Belshaw Bros., Inc.

814 44th Street NW, Suite 103

Auburn, WA 98001 USA

Phone: [phone]  Fax: [phone]

E-mail: [e-mail]  http://www.belshaw.com

If you accept the machine from the shipping
company, you are, in effect, saying that the
machine is in good condition, and you must
pay for the machine. Belshaw cannot pay for

shipping damage, because the freight company
has accepted the machine from Belshaw in good
condition, and is responsible for its safe delivery.
For your protection, inspect the machine to see
that no parts are bent, scratched, or otherwise
damaged. If any damage has occurred in
shipping, file a freight claim with the shipping
company immediately.

To unpack the Donut Robot

Mark IX and



transport it to the work station:

1. Remove the foam and other packing

materials from the two boxes.

2. Carry the hopper, plunger, and column to the

work station.

3. Coil the cutter head power cord and carry
the cutter head to the work station.

4. Carry the conveyor assembly to the work
station.

5. Remove the clevis pins that hold the heater
head in place, and lift the heater head out of
the fryer.

6. Coil the power cord and carry the heater
head to the work station.

7. Move the fryer case and kettle to the work
station.

EQUIPMENT RECORD

Please provide the information below when you correspond with us about your machine.
Purchased by _____________________________________________________________________
Installed by ______________________________________________________________________
Date of Installation ________________________________________________________________
Model number ___________________________________________________________________
Serial number

012308

MN-1053EN

Belshaw Bros., Inc.

814 44

Phone: [phone]  Fax: [phone]

th

Street NW, Suite 103

Auburn, WA 98001 USA

E-mail: [e-mail]  http://www.belshaw.com

Contents

1 Installation 1

Unpacking the Fryer 2
Initial Cleaning 2
Assembling the Fryer 2
Assembling the Cutter 4
Adjusting the Hopper 7
Leveling and Securing the Fryer Error! Bookmark not defined.
Moving the Fryer 8

2 Maintenance 10

Lubricating 10
Checking the Thermostat 11

3 Troubleshooting 12

Mark IX 13
Feed Table FT42 23

4 Electrical Components 25

Continuity Testing 25
Robertshaw Thermostats 28

5 Appendix 30

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Donut Robot Mark IX TS MN-1053EN iii

Preface

The Donut Robot Mark IX is designed to
automatically cut and fry cake donut products,
and to fry yeast-raised donut products. It is not
designed to cut or fry any other products.

The Mark IX uses electrical elements to heat
shortening in its kettle. The Donut Robot Mark
IX produces only 82 dB(A) of equivalent
continuous A-weighted sound pressure at work
stations. This has been determined during a dry
run of the machine, using a Bruel & Kjaer sound
level meter, type 2236.

The Mark IX is meant to be used on a flat,
stationary table or countertop, with the operator
standing opposite the heater head of the machine.
The operator must work safely at all times and
read this manual and follow its instructions and
warnings.

Study the instructions and warnings in this
manual carefully. A thorough understanding of
how to install, maintain, and safely operate the
Donut Robot Mark IX will prevent production
delays and injuries.

To use the Mark IX safely, heed the following
warnings and all other warnings that appear in
this manual:

 Make sure the machine is secured to the

work surface. Doing so will prevent the
machine from moving or falling, which
could cause serious injury.

 Never let water and hot shortening come

in contact with each other. Moisture
causes hot shortening to spatter, which
may cause serious burns.

could cause someone to slip on the floor
and be seriously injured.

 Hot shortening can cause serious burns.

Make sure that the system and the
shortening are cool before attempting
any adjustment, repair, disassembly, or
cleaning.

 To avoid electrocution or other injury,

unplug the machine before attempting
any adjustment, repair, disassembly, or
cleaning.

 To avoid damaging the machine, never

use force to assemble, disassemble,
operate, clean, or maintain it.

 Be careful never to get shortening,

water, or other materials on the floor. If
anything does get spilled on the floor,
mop it up immediately. Materials on the
floor can cause people to slip or fall,
resulting in serious injury or loss of life.

 To prevent unintentional startup and

possible fire, unplug the machine if there
is a local power outage. When the
power is restored, it is safe to plug the
machine in again.

 To avoid electrocution, make sure that

all electrical cords are not frayed or
cracked and that they do not pass
through any water or shortening.

 Make sure that all electrical cords are

routed so that no one will trip over them.

 Do not overfill the kettle with

shortening. If shortening overflows the
kettle, it could cause serious burns or

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iv MN-1053EN Donut Robot Mark IX TS

1 Installation

To help familiarize you with the major parts of
your Donut Robot Mark IX, please study the
photograph below.

cutter head

plunger

hopper

heater head

swing column fryer swing connecting rod

Figure 1-1. Donut Robot Mark IX, Front View.

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Donut Robot Mark IX TS MN-1053EN 1

Unpacking the Fryer

To unpack the Donut Robot Mark IX and
transport it to the work station:

1. Remove the foam and other packing

materials from the two boxes.

2. Carry the hopper, plunger, and column to the

work station.

3. Coil the cutter head power cord and carry
the cutter head to the work station.

4. Carry the conveyor assembly to the work
station.

5. Remove the clevis pins that hold the heater
head in place, and lift the heater head out of
the fryer.

6. Coil the power cord and carry the heater
head to the work station.

7. Move the fryer case and kettle to the work
station.

Initial Cleaning

Thoroughly clean your Donut Robot Mark IX
before using it. Remove all packing materials.
Refer to Section 2 of the Operator's Manual,
“Cleaning,” for disassembly and cleaning
instructions.

WARNING

To avoid electrocuting yourself or
damaging the machine, never allow water,
steam, cleaning solution, or other liquid to

enter the cutter head or heater head

assemblies.

WARNING

Never let water and hot shortening come in

contact with each other. Moisture causes

hot shortening to spatter, which may cause

serious injury. Prior to use, make sure that

the kettle and any other parts you have

washed are dry.

After cleaning, assemble the fryer and cutter as
explained below.

Assembling the Fryer

1. Place the fryer case on a flat, stationary
surface.

2. Screw the fryer’s legs in as far as they will
go.

3. Set the kettle into the fryer case. The end of
the kettle that has the locating pin must be
placed at the outfeed end of the fryer case.
The lip of the kettle should fit securely over
the edge of the case.

4. Install the heater head assembly as follows:
a. Align the holes in the heater head end

caps with the holes in the heater head
mounting brackets.

b. Slide the clevis pins through the holes so

that the pin heads are on the outsides.

c. Insert the hairpin clips into the holes in

the clevis pins.

5. Lower the heater head assembly into
position so the bulb bracket rests on or very
near the bottom of the kettle.

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2 MN-1053EN Donut Robot Mark IX TS

6. Install the conveyor assembly as follows:
a. Hold the conveyor at the angle shown in

Figure 1-2 and slide the conveyor drive
coupling over the main drive shaft
coupling. The conveyor coupling has a
notch in it. Turn the conveyor coupling
until the head of the socket head screw
in the drive coupling can slide into this
notch. (See Figure 1-2.)

b. Lower the front side of the conveyor

assembly so the hole in the conveyor
flange fits over the locating pin on the
lip of the kettle.

Figure 1-2. Joining the Couplings.

If you are preparing to make yeast-raised donuts,
skip steps 7 and 8 proceed to step 9.

7. Insert the swing column into the swing
column mounting bracket. Make sure the
plastic spacer washer is on the swing column
between the set collar and the swing column
mounting bracket. See Figure 1-3.

Figure 1-3. Inserting the Swing Column.

8. Connect the swing connecting rod to the
throw arm of the swing column. A locating
pin on the swing connecting rod rests in a
hole in the throw arm. See Figure 1-4.

Figure 1-4. Connecting the Swing

Connecting Rod.

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Donut Robot Mark IX TS MN-1053EN 3

9. Make sure your power source matches the
specifications on the data plate. Connect the
machine to the power source.

10. Turn on the conveyor only and check to see
that it operates smoothly. The power switch
for the conveyor drive is on the heater head.

Assembling the Cutter

If you are preparing to make yeast-raised donuts,
skip this section.

1. Mount the cutter head assembly as follows:
a. Find the locating pin on the bottom of

the cutter head assembly.

b. Insert this pin into the hole in the

mounting block. The mounting block is
at the top of the swing column. See
Figure 1-5.

2. Attach the cylinder assembly to the hopper
as follows:

a. Place the hopper on a flat surface so the

bottom of the hopper faces up.

b. Hold the wide end of the cylinder

assembly in the palm of your hand and
turn it upside down.

c. Line up the two slots in the cylinder

assembly with the two springs on the
hopper. See Figure 1-6.

Figure 1-6. Lining up the Cylinder Assembly

with the Hopper

d. Press the cylinder assembly all the way

into the hopper.

e. Turn the cylinder assembly 1/4 turn so

the pins in the hopper slide into the slots
in the cylinder assembly. See Figure 1-

7.

Figure 1-5. Mounting the Cutter Head

Assembly.

c. Insert and tighten the thumb screw

underneath the mounting block.

The mounting block tilts so the hopper and
cutter can be swung away from the kettle for
priming and disassembling.

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4 MN-1053EN Donut Robot Mark IX TS

Figure 1-7. Attaching the Cylinder Assembly

to the Hopper.

3. Put the plunger in the hopper as follows:
a. Loosen the thumb screw on the hopper

arch.

b. Notice that the plunger has three center

rods held together by a sliding collar.
Slide the collar up the plunger as far as
you can. See Figure 1-8.

Figure 1-8. Sliding the Collar up the

Plunger.

c. Turn the plunger so the center rods are

perpendicular to the slot in the hopper
arch.

d. Slide the plunger assembly into the

hopper. The piston slides down into the
hopper cylinder, the center rods slide
into the slot in the hopper arch, and the
collar rests on top of the hopper arch.

e. Tighten the thumb screw through the

hopper arch. This thumb screw holds
the plunger in place. See Figure 1-9.

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Donut Robot Mark IX TS MN-1053EN 5

b. There are two sets of pins toward the top

of the plunger, perpendicular to the
center rods. There are two trip arms on
the cutter head which have slots in their
ends. Slide the pins into the slots. See
Figure 1-11.

Figure 1-9. Tightening the Plunger Thumb

Screw.

4. Mount the hopper as follows:
a. There are two locating pins at the top

rear of the hopper. Insert these into the
two holes in the bottom of the cutter
head. See Figure 1-10.

Figure 1-11. Inserting the Plunger’s

Locating Pins.

5. Screw the thumb nut onto the longer of the
two hopper locating pins. See Figure 1-12.

Figure 1-10. Inserting the Hopper’s Locating

Pins.

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6 MN-1053EN Donut Robot Mark IX TS

Figure 1-12. Screwing on the Thumb Nut.

Adjusting the Hopper

If you are preparing to make yeast-raised donuts,
skip this section.

WARNING

Always disconnect the machine from the

power source before making adjustments.

1. The bottom of the hopper should be 1”/2.5
cm above the flight bars. To set the height
of the hopper:

a. Hold the cutter and the hopper from

below.

6. Plug the signal cord into the receptacle at the
end of the heater head, in the rear. The plug
of this cord is squarish and has three flat
prongs and one cylindrical prong.

7. Plug the cutter head power cord into the
receptacle near the middle of the heater
head, in the rear. The plug of this cord is
cylindrical and has two rounded, flat prongs
and one cylindrical prong.

8. Test the cutter head to ensure that it is
operating properly. Turn it on using the
prime switch on the cutter head. The cutter
should run continuously. Turn off the cutter.

b. Loosen the set screw in the lower set

collar on the swing column.

c. Raise or lower the swing column as

needed.

d. Tighten the set screw. See Figure 1-13.

Figure 1-13. Adjusting the Height of the

Hopper

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Donut Robot Mark IX TS MN-1053EN 7

2. As the hopper swings back and forth over
the kettle, the hopper cylinder should stop
the same distance away from either side of
the kettle at each end of the swing.

To check the swing of the hopper, turn on

the conveyor. If you need to center the
swing of the hopper, follow these steps:

a. Turn off the conveyor.
b. Loosen the two hex screws in the front

of the cutter head mounting block.

c. Rotate the cutter head and mounting

block as needed.

d. Tighten the hex screws. (See Figure 1-

14.)

e. Double-check the swing of the hopper

by turning on the conveyor. Then turn
off the conveyor.

Leveling and Securing the
Fryer

Check to see if the fryer is level. If it is not,
adjust the heights of the legs. Be sure that all six
legs rest on the work surface when the fryer is
level.

Bolt the fryer to the work surface as follows:

1. There are brackets on the ends of the fryer
case. Each has a hole in it. Mark the
locations of the holes on the work surface.

2. Drill holes through the work surface.

3. Insert bolts through the holes.

4. Tighten nuts onto the bolts to ensure that the
Donut Robot will not move.

Moving the Fryer

Figure 1-14. Adjusting the Swing of the

Hopper.

If you ever need to move the fryer to a different
work station, follow this procedure:

1. Turn off the machine and disconnect it from
the power source. Unplug the cutter head
power cord.

2. Allow the machine and the shortening to
cool.

WARNING

Do not touch hot shortening. It can cause

serious burns.

3. Remove and set aside the hopper and
plunger.

4. Remove and set aside the cutter head.

5. Disconnect the swing connecting rod.
Remove and set aside the swing column.

6. Remove the shortening from the fryer as
explained in “Removing the Shortening” in
Section 2 of the Operator's Manual.

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8 MN-1053EN Donut Robot Mark IX TS

7. To avoid dropping the machine or getting
shortening on the floor, wipe excess
shortening off of the fryer and conveyor.

WARNING

Thoroughly clean and dry the floor if

shortening is spilled. Materials on the floor

can cause people to slip or fall, resulting in

serious injury or loss of life.

8. Set aside the conveyor.

9. Remove the clevis pins that hold the heater
head in place. Remove the heater head from
the fryer.

10. To avoid tripping, coil the power cord.
Move the heater head to the new work
station.

11. Remove the bolts that secure the fryer to the
work surface.

12. Move the fryer to its new location.

13. Install the heater head.

14. Move and install the conveyor.

15. Move and install the swing column.
Connect the swing connecting rod.

16. Move and install the cutter head.

17. Move and install the hopper and plunger.

18 Level and secure the fryer.

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Donut Robot Mark IX TS MN-1053EN 9

2 Maintenance

WARNING

To avoid being burned, electrocuted, or

otherwise injured, always unplug the

machine and allow it to cool down before

performing any maintenance.

Lubricating

Once a Week

1. Apply a few drops of SAE 30 machine oil to
the swing column where it contacts the
swing column bracket.

2. Remove the heater head cover and lightly
coat the gear teeth with multipurpose grease.
Replace the cover. See Figure 2-1.

Twice a Year

Lubricate the operating cams as follows:

1. Tilt the crank case so the trip arms point up.

2. Unscrew and remove the rear cover of the
cam case. This is a small, rectangular plate.

3. Apply several drops of oil through the
lubricating hole in the lower trip arm.

Once a Year

Lubricate the conveyor drive motor as explained
below.

1. Disconnect the machine from the power
source.

2. Remove the back cover of the heater head.

3. Unscrew the two bolts that connect the
conveyor drive assembly to the bottom of
the heater head.

CAUTION

Be gentle with all parts of the conveyor

drive assembly, especially when pulling the

assembly out of the heater head and

putting it back in the heater head..

Damaging the parts could stop production.

4. Carefully pull the motor out of the heater
head. See Figure 2-2.

Figure 2-1. Lubricating the Drive Gears.

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10 MN-1053EN Donut Robot Mark IX TS

Checking the Thermostat

If the quality of your product decreases, check
the accuracy of the thermostat. Heat some
shortening in the fryer, measure the temperature
of the shortening using a thermometer you know
to be accurate, and compare this reading to the
thermostat setting. It is important that you put
the thermometer in the top 1”/2.5 cm or so of
shortening, because this is where the donuts are
fried, and this is where the temperature should be
consistent. If you need to calibrate the
thermostat, consult Section 4, “Electrical
Components.”

Figure 2-2. Removing the Conveyor Drive

Motor.

5. Apply 4 to 6 drops of SAE 30 machine oil
through the lubricating hole in the bearing
cap until the felt pad is saturated. See
Figure 2-3.

Figure 2-3. Lubricating the Conveyor Drive

Motor.

If you ever want to test the continuity of the
thermostat or any of the switches on your Donut
Robot, refer to Section 4, “Electrical
Components.”

6. Carefully put the motor back in the heater
head, bolt the motor to the heater head, and
replace the back cover of the heater head.

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Donut Robot Mark IX TS MN-1053EN 11

3 Troubleshooting

This section is designed as an aid in
troubleshooting, not as a substitute for a
qualified technician. You may encounter a
problem with your machine that is not covered in
this section, or you may try the remedies
suggested here and find that they do not solve the
problem. If this happens, call your dealer or
another qualified technician. Also, call your
dealer if you need a replacement part.

If your dealer cannot help you, please call
Belshaw Bros. We will try to help you solve the
problem over the phone. When you call, please
specify the following:

 The model name of the machine.
 The serial number of the machine.
 The voltage, phase, and cycle of the

machine.

If your machine needs to be repaired, consult
your dealer or another local, qualified technician.
If they cannot repair your machine, Belshaw can
provide factory service. First call us for a return
goods authorization. Then send your machine to
us, freight prepaid, with your instructions for
service, your phone number, and the name of the
person for us to contact when we have made a
cost estimate. In most cases, the machine can be
shipped back, freight collect, within five days.
Ship your machine to:

To avoid down time, call us to see whether we
have a machine we can loan to you while your
machine is being serviced.

CAUTION

If you perform repairs yourself or have

them performed by anyone other than a

service technician authorized by Belshaw

Bros., you do so at your own risk.

Following is a troubleshooting chart to help you
identify and solve some basic problems. For
additional information regarding baking mixes,
temperature, and fry time, refer to Section 5 in
the Operator's Manual, “Donut-Making Helps.”

WARNING

To avoid being burned, electrocuted, or

otherwise injured, unplug the machine and

allow it to cool before disassembling,

repairing, or wiring.

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814 44th Street NW, Suite 103
Auburn, WA 98001 USA

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12 MN-1053EN Donut Robot Mark IX TS

Mark IX

THE DONUTS BALL OR BLISTER.

Possible Causes What To Do

The dough is too cold. See Section 5 in the Operator's Manual, “Donut-

Making Helps.”

The shortening is too hot. Decrease the temperature setting.

The dough is overmixed. Review the mixing procedure.

The donuts are too large. Adjust the dial on the cutter head to produce smaller

donuts.

The shortening is old or contaminated.

Replace the bad shortening with fresh shortening.

To avoid being burned, turn off the machine and
allow the shortening to cool.

WARNING

THE DONUTS ARE UNDERCOOKED.

Possible Causes What To Do

The shortening is not hot enough. Increase the temperature setting.

The conveyor is moving too quickly. Decrease the speed of the conveyor, using the knob

labeled “Fry Time in Seconds.”

The dough is too cold. See Section 5 in the Operator's Manual, “Donut-

Making Helps.”

The dough has not had enough floor time. See Section 5 in the Operator's Manual, “Donut-

Making Helps.”

The thermostat reads inaccurately. Calibrate the thermostat.

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Donut Robot Mark IX TS MN-1053EN 13

THE DONUTS ARE OVERCOOKED.

Possible Causes What To Do

The shortening is too hot. Decrease the temperature setting. The temperature

setting should never exceed 375F/191C.

The conveyor is moving too slowly. Increase the speed of the conveyor, using the knob

labeled “Fry Time in Seconds.”

The thermostat reads inaccurately. Calibrate the thermostat.

THE DONUTS ARE SHAPED IMPERFECTLY.

Possible Causes What To Do

The shortening level is too low. Add shortening to reach the proper level.

The hopper is too far above the shortening. Lower the hopper to 1”/2.5 cm above the shortening.

The drop plate is out of position. Reposition the drop plate.

The tip of the cylinder is dirty.

Clean the cylinder.

The tip of the cylinder is nicked. Replace the hopper.

The size-selection dial is not tightened. Tighten the thumb nut.

The dough is overmixed. Review the mixing procedure.

To avoid being burned or otherwise injured,
before doing either of the following, turn off the
machine and allow the shortening to cool.

To avoid injury, turn off the machine and remove
the hopper.

WARNING

WARNING

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14 MN-1053EN Donut Robot Mark IX TS

THE CUTTER SWING COLUMN CHATTERS.

Possible Causes What To Do

The nylon thrust washer is missing. Install the nylon thrust washer between the swing

There is not enough lubrication between the
swing column and the swing column mounting
bracket.

To avoid injury, before doing either of the
following, turn off the machine.

column bracket and the set collar.

Lubricate the upper and lower legs of the bracket
with SAE 30 machine oil.

WARNING

THE CONVEYOR BITES THE DONUTS.

Possible Causes What To Do

The donuts are not cooking enough. See “The donuts are undercooked” below.

The shortening level is too low. Add shortening to reach the proper level.

WARNING

The turner is bent or packed with cooked food
particles.

The cam weight is sticking due to the
accumulation of varnish.

The fryer is not level. Level the fryer.

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Donut Robot Mark IX TS MN-1053EN 15

To avoid being burned or otherwise injured,
before doing any of the following, turn off the
machine and allow the shortening to cool.

Straighten and/or clean the turner.

Clean to remove the cooked-on varnish.

THE CUTTER OPERATES CONTINUOUSLY.

Possible Causes What To Do

One of the microswitches is defective. (There
are three microswitches in the conveyor drive
assembly and one microswitch in the cutter
head.)

Something is interfering with the nylon brake
dog in the cutter head.

The brake spring in the cutter head is weak or
broken.

WARNING

To avoid being burned, electrocuted, or otherwise
injured, before doing any of the following, turn
off the machine, allow the shortening to cool, and
disconnect the machine from the power source.

For help in testing the microswitches, refer to
Section 4, “Electrical Components.” Replace any
defective microswitches.

Clear away the cause of the interference.

Replace the spring.

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16 MN-1053EN Donut Robot Mark IX TS

THE HEATING ELEMENT FAILS TO MAINTAIN THE PROPER
TEMPERATURE.

Possible Causes What To Do

The input voltage is incorrect. Supply the correct power as specified on the data

plate.

Sediment has accumulated around the
thermostat bulb.

Clean to remove the sediment. (Clean the Donut

The thermostat has been calibrated incorrectly. Recalibrate the thermostat.

The thermostat is defective.

Replace the thermostat.

To avoid being burned or otherwise injured, turn
off the machine and allow the shortening to cool.

Robot regularly and thoroughly.)

To avoid being burned, electrocuted, or otherwise
injured, turn off the machine, allow the
shortening to cool, and disconnect the machine
from the power source.

WARNING

WARNING

THE DONUTS DROP AT THE WRONG TIME.

Possible Cause What To Do

The hopper swing is adjusted incorrectly.

Adjust the hopper swing. See “Adjusting the

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Donut Robot Mark IX TS MN-1053EN 17

To avoid injury, turn off the machine.

Hopper” in Section 1, “Installation.”

WARNING

THE CONVEYOR IS JAMMED.

Possible Causes What To Do

The hopper is too low and the cutter or the
hopper is catching on the flight bars.

Cooked food particles are wedged between a
chain opening and a sprocket tooth.

The turner slot is packed with cooked food
particles.

The drop plate is out of position and is
interfering with the conveyor.

Something is interfering with the free movement
of the turner cam and cam weight.

The heating element is bent and is interfering
with the turner.

WARNING

To avoid being burned or otherwise injured,
before doing any of the following, turn off the
machine and allow the shortening to cool.

Raise the hopper to 1”/2.5 cm above the flight bars.

Clean to remove the food particles. Clean the Donut
Robot regularly and thoroughly.

Clean to remove the food particles.

Reposition the drop plate.

Remove the obstruction.

Straighten the heating element.

The turner is out of position and is catching on a
flight bar below.

The conveyor drive shaft and the drive motor
shaft are out of alignment.

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18 MN-1053EN Donut Robot Mark IX TS

Lift and move the outfeed end of the conveyor to
disengage the conveyor coupling from the conveyor
drive shaft. Turn the conveyor back 2-3 pockets.
The turner will return to the correct position.

Remove the cover of the drive assembly. Loosen the
four mounting spacers so the drive assembly can be
moved. Align the motor shaft with the conveyor
shaft. When they are aligned, tighten the mounting
spacers. Replace the cover.

THE MOTOR OVERHEATS.

Possible Causes What To Do

The power requirements of the machine do not
match the power source.

The motor is binding. Repair or replace the motor.

The motor is defective. Repair or replace the motor.

Supply the correct power as specified on the data
plate.

WARNING

To avoid being burned, electrocuted, or otherwise
injured, before doing the following, turn off the
machine, allow the shortening to cool, and
disconnect the machine from the power source.

THE CUTTER CUTS DOUBLE WHEN YOU HAVE SELECTED ONE CUT PER
POCKET.

Possible Causes What To Do

WARNING

The nylon brake dog is binding on the cutter
brake motor.

An internal wire is interfering with the nylon
brake dog.

The arm on the cutter head microswitch is bent. Bend the arm back into position or replace the

The wires on the cutter head microswitch are
reversed.

To avoid being burned, electrocuted, or otherwise
injured, before doing any of the following, turn
off the machine, allow the shortening to cool, and
disconnect the machine from the power source.

Loosen the brake dog. If the spring is missing or
weak, replace it. If the brake dog is worn, replace it.

Move the wire.

microswitch.

Make the correct connections.

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Donut Robot Mark IX TS MN-1053EN 19

THE CUTTER WILL NOT OPERATE, BUT THE CONVEYOR RUNS.

Possible Causes What To Do

The cutter head power cord is not plugged in to
the outlet on the back of the heater head.

The set screws in the cutter head cam are loose. Tighten the set screws.

The cutter head power cord is broken. Repair or replace the cutter head power cord.

The cutter motor is defective. Replace the cutter motor.

One of the microswitches is defective. (There
are three microswitches in the conveyor drive
assembly and one microswitch in the cutter
head.)

The cutter head power switch is defective. Replace the cutter head power switch.

Connect the cutter head power cord to the correct
outlet.

WARNING

To avoid being burned, electrocuted, or otherwise
injured, before doing any of the following, turn
off the machine, allow the shortening to cool, and
disconnect the machine from the power source.

For help in testing the microswitches, refer to
Section 4, “Electrical Components.” Replace any
defective microswitches.

The circuit breaker on the back of the heater
head is defective.

The cutter head assembly wiring harness is not
connected.

The cuts-per-pocket switch is defective. Replace the cuts-per-pocket switch.

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20 MN-1053EN Donut Robot Mark IX TS

Replace the circuit breaker.

Check the connection between the pin housing in the
conveyor drive assembly and the socket housing in
the heater head. Also, make sure that the pins are
securely seated in the pin housing.

THE ELEMENT WILL NOT HEAT, AND THE CONVEYOR WILL NOT RUN.

Possible Causes What To Do

The power cord is not plugged in, or the outlet
has no power.

The power cord is defective. Replace the power cord.

The transformer is defective. Replace the transformer.

The connections to the transformer are bad. Rewire the connections to the transformer.

Connect the machine to a good power source.

WARNING

To avoid being burned, electrocuted, or otherwise
injured, before doing any of the following, turn
off the machine, allow the shortening to cool, and
disconnect the machine from the power source.

THE ELEMENT WILL NOT HEAT, BUT THE CONVEYOR RUNS.

Possible Causes What To Do

The high temperature limit control switch has
been tripped.

Push the red reset button on the back panel of the
heater head.

The thermostat has been calibrated incorrectly. Recalibrate the thermostat.

The high temperature limit control is defective. Replace the high temperature limit control.

The thermostat is defective. Replace the thermostat.

The contactor for the transistor is defective. Replace the contactor.

The connections to the contactor are bad. Rewire the connections to the contactor.

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Donut Robot Mark IX TS MN-1053EN 21

To avoid being burned, electrocuted, or otherwise
injured, before doing any of the following, turn
off the machine, allow the shortening to cool, and
disconnect the machine from the power source.

WARNING

THE ELEMENT HEATS, BUT THE CONVEYOR WILL NOT RUN.

Possible Causes What To Do

The input voltage is incorrect. Supply the correct power as specified on the data

plate.

The circuit breaker has been tripped. Reset it by moving the white switch on the back of

the heater head to “off” and then to “on.” If the
conveyor still will not run, see that the power source
agrees with the specifications on the data plate. If
the problem persists, see below.

There is a short circuit. Find it and repair it. (First, see “The circuit breaker

The wiring harness in the conveyor drive
assembly is not connected.

The conveyor drive power switch is defective. Replace the switch.

The nylon brake dog is binding on the conveyor
brake motor.

The brake motor is defective. Replace the brake motor.

To avoid being burned, electrocuted, or otherwise
injured, before doing any of the following, turn
off the machine, allow the shortening to cool, and
disconnect the machine from the power source.

has been tripped” above.)

Check the connection of the pin connector from the
conveyor drive assembly to the socket connector in
the heater head enclosure. Make sure the pins in the
pin housing are securely seated in the housing.

If the brake dog is worn, replace it. If it is too tight,
loosen it. If the spring is weak or missing, replace it.

WARNING

An internal wire is interfering with the nylon
brake dog.

A fan blade is caught on a wire. Move the wire.

The conveyor is jammed. Clear the obstruction.

The couplings are not engaged. Engage the couplings.

The conveyor drive coupling is slipping. Tighten the two set screws.

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22 MN-1053EN Donut Robot Mark IX TS

Move the wire.

Feed Table FT42

THE CONVEYOR CHAINS DO NOT ADVANCE WHEN THE MAIN POWER IS
ON OR WHEN THE PRIME SWITCH IS PRESSED, AND THE PILOT LIGHT
DOES NOT COME ON.

Possible Causes What To Do

The power cord is not connected. Plug in the power cord.

The circuit breaker for the gear box outlet on the
Donut Robot’s heater head is tripped.

The black or white wire in the power cord is
broken or poorly connected.

The fuse on the Feed Table is blown. Replace the fuse.

The fuse for the Donut Robot’s conveyor is
blown.

Push the white reset button near the outlet.

WARNING

To avoid electric shock or other injury, before
doing any of the following, unplug the machine.

Repair the cord and/or make the proper connection.

Replace the fuse.

THE CONVEYOR CHAINS DO NOT ADVANCE WHEN THE MAIN POWER IS
ON, BUT THEY DO ADVANCE WHEN THE PRIME SWITCH IS PRESSED.

Possible Causes What To Do

The red wire in the power cord is broken or
poorly connected.

The microswitch in the power head assembly is
defective.

The microswitch in the Donut Robot’s signal
circuit is defective.

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Donut Robot Mark IX TS MN-1053EN 23

To avoid electric shock or other injury, before
doing any of the following, unplug the machine.

Repair the cord and/or make the proper connection.

Replace the microswitch.

Replace the microswitch.

WARNING

THE CONVEYOR CHAINS DO NOT ADVANCE AT ALL, DO NOT ADVANCE
FAR ENOUGH, OR DO NOT ADVANCE THE SAME DISTANCE DURING
EACH CYCLE, BUT THE PILOT LIGHT DOES COME ON.

Possible Cause What To Do

The cam in the power head is loose. Tighten the cam set screw.

To avoid injury, before doing the following,
unplug the machine.

WARNING

THE CONVEYOR CHAINS ADVANCE CONTINUOUSLY WHEN THE MAIN
POWER IS ON.

Possible Causes What To Do

The brake is defective. Repair or replace the brake.

The cam in the power head is loose. Tighten the cam set screw.

To avoid electric shock or other injury, before
doing any of the following, unplug the machine.

WARNING

The microswitch in the power head is defective. Replace the microswitch.

The microswitch in the Donut Robot’s signal
circuit is defective.

Replace the microswitch.

TWO ROWS OF DONUTS ARE ADVANCED DURING EACH CYCLE.

Possible Causes What To Do

The brake is defective. Repair or replace the brake.

The cam in the power head is loose. Tighten the cam set screw.

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24 MN-1053EN Donut Robot Mark IX TS

To avoid electric shock or other injury, before
doing either of the following, unplug the machine.

WARNING

4 Electrical Components

This section explains how to test the continuity
of electrical components in the Donut Robot
Mark IX. These include the toggle switches, the
microswitches, and the thermostat.

The section also contains a document by the
Robertshaw Controls Company, the maker of the
thermostat we use in the Donut Robot Mark IX.
It explains how to check, adjust, and recalibrate
the thermostat.

switch terminals
toggle switch

Continuity Testing

To test the continuity of a toggle switch:

WARNING

To avoid the possibility of electric shock,

disconnect the machine from the power

source before testing.

1. Disconnect the machine from the power
source.

2. Disconnect the terminal wires from the
switch.

3. Obtain a continuity tester or a volt-ohm
meter. If neither of these instruments is
available, make a continuity tester using a
battery and a bulb. See Figure 4-1.

4. Connect the wires of the continuity tester to
the switch terminals, as shown in Figure 4-1,
and test the switch in the ON and OFF
positions. The switch should show
continuity only when in the ON position.

+

battery
_

Figure 4-1. Toggle Switch Continuity Test.

To test the continuity of a microswitch:

WARNING

To avoid the possibility of electric shock,

disconnect the machine from the power

source before testing.

1. Disconnect the machine from the power
supply.

2. Disconnect the terminal wires from the
switch.

3. Obtain a continuity tester or a volt-ohm
meter. If neither of these instruments is

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Donut Robot Mark IX TS MN-1053EN 25

available, make a continuity tester using a
battery and a bulb. See Figure 4-2.

4. Connect one wire of the continuity tester to
the microswitch’s common (COM) terminal
and the other wire to the normally open
(NO) terminal, as shown in Figure 4-2. The
switch should show continuity only when
the microswitch actuator arm is depressed.

5. To test the normally closed (NC) terminal,
move the wire from the normally open (NO)
terminal to the normally closed terminal.
Now the switch should show continuity only
when the actuator arm is not depressed.

switch
terminals

NC NO

COM

microswitch

To test the continuity of the thermostat:

WARNING

To avoid the possibility of electric shock,

disconnect the machine from the power

source before testing.

1. Disconnect the machine from the power
supply.

2. Disconnect the terminal wires from the
thermostat.

3. Connect the continuity tester across the B
terminals indicated in Figure 4-3. This set
of contacts should be closed whenever the
thermostat is on. To test, start with the
thermostat in the OFF position. Then turn
the thermostat up until you hear a distinct
click (at about the 175F/79C setting). At
this time, there should be continuity across
the B terminals.

+

battery



Figure 4-2. Microswitch Continuity Test.

4. Connect the continuity tester across the A
terminals indicated in Figure 4-3. Start with
the thermostat in the OFF position and turn
the thermostat up until you hear a distinct
click. If there is no continuity (the indicator
or light does not come on), proceed to
step 5.

5. With the continuity tester still connected,
turn the thermostat knob to OFF and remove
the knob. There is an adjusting screw in the
center of the knob stem. Turn it counter­clockwise until there is continuity. If there
is no continuity (the indicator or light does
not come on), then the thermostat is
defective. If there is continuity, proceed to
step 6.

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26 MN-1053EN Donut Robot Mark IX TS

6. Immerse the thermostat sensing bulb in a
pan of boiling water and set the thermostat
at about 212F/100C. The continuity
tester’s indicator or light should go off. If
the indicator or light does not go off,
increase the temperature setting of the
thermostat until it does. Then recalibrate the
thermostat according to the manufacturer’s
instructions. If the indicator or light will not
go off at any setting or recalibration, then
the thermostat is defective.

“B” terminals

“A” terminals

Figure 4-3. Thermostat Terminals.

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Donut Robot Mark IX TS MN-1053EN 27

5 Appendix

See Parts List Drawing Insert Page

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30 MN-1053EN Donut Robot Mark IX TS