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1245MA
1246MA
4153-1-1245-3-2
Taicang 2012-02
© Tribonia Intl.
Adjustment Manual
M
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215400 Taicang, Jiangsu
Page 3
Index
Contents ..................................................................................Page
13 Adjustment ........................................................................................................................... 5
13.01 Notes on adjustment ....................................................................................................... ...... 5
13.02 Tools, gauges and other accessories for adjusting ...............................................................5
13.03 Abbreviations ............................................................................................................. ............ 5
13.04 Explanation of the symbols ................................................................................................ .... 5
13.05 Adjusting the basic machine ............................................................................................... ... 6
13.05.01 Positioning the feed dog across the direction of sewing ....................................................... 6
13.05.02 Positioning the feed dog in the direction of sewing .............................................................. 7
13.05.03 Height of the bottom feed-dog ......................................................................................... .... 8
13.05.04 Pre-adjusting the needle height ........................................................................................ ..... 9
13.05.05 Centering the needle in the needle hole .............................................................................. 10
13.05.06 Lifting motion of the bottom feed-dog . ............................................................................... 1 1
13.05.07 Driving motion of the bottom and top feeds ........................................................................ 12
13.05.08 Hook-to-needle clearance, needle rise, needle height and needle guard ...........................13
13.05.09 Top-feed stroke ........................................................................................................ ............ 15
13.05.10 Lifting motion of the top feed ........................................................................................ ..... 16
13.05.11 Bobbin-case opener .................................................................................................... ........ 17
13.05.12 Safety clutch .......................................................................................................... .............. 18
13.05.13 Needle thread tension release .......................................................................................... ... 19
13.05.14 Thread check spring .................................................................................................... ......... 20
13.05.15 Thread check spring .................................................................................................... ......... 21
13.05.16 Bobbin winder .......................................................................................................... ............ 22
13.05.17 Presser-foot pressure .................................................................................................. ......... 23
13.06 Adjusting the thread trimmer -900/56 ................................................................................. 24
13.06.01 Pre-adjusting the control cam ......................................................................................... .... 24
13.06.02 Tripping lever ......................................................................................................... ............... 25
13.06.03 Pawl .................................................................................................................. .................. 26
13.06.04 Engaging solenoid ...................................................................................................... .......... 27
13.06.05 Release trip .......................................................................................................... ............... 28
13.06.06 Engaging lever ......................................................................................................... ............ 29
13.06.07 Linkage rod ........................................................................................................... .............. 30
13.06.08 Final adjustment of the control cam .................................................................................... 31
13.06.09 Catch ................................................................................................................. .................. 33
Page 4
Index
Contents ..................................................................................Page
13.06.10 Connecting rod (for MA 1246 only) ..................................................................................... 34
13.06.11 Thread-catcher height ................................................................................................. .............35
13.06.12 Knife ................................................................................................................. ................... 36
13.06.13 Thread catcher reverse position ............................................................................................... ..........37
13.06.14 Bobbin-thread clamp spring .................................................................................................... ............38
13.06.15 Tension release bar ............................................................................................................ ..................40
13.07 Parameter settings ........................................................................................................... ... 42
13.07.01 Parameter list ......................................................................................................... .............. 42
14 Circuit diagrams ................................................................................................................. 43
Page 5
Adjustment
5
13 Adjustment
Please observe all notes from Chapter 1 Safety of the instruction manual!
In particular care must be taken to see that all protective devices are re tted
properly after adjustment, see Chapter 1.06 Danger warnings of the instruction
manual!
If not otherwise stated, the machine must be disconnected from the electrical
power supply. Danger of injury due to unintentional starting of the machine!
The illustrations in this section show the MA 1245 single-needle machine.
For the MA 1246 two-needle machine, various adjustments must be made
twice, i.e. to the left- and right-hand sewing hooks. This will be pointed out in
the respective sections, whereby it is often possible to apply the mirror image
of the illustrations.
13.01 Notes on adjustment
All following adjustments are based on a fully assembled machine and may only be carried
out by expert staff trained for this purpose.
Machine covers, which have to be removed and replaced to carry out checks and adjustments, are not mentioned in the text.
The order of the following chapters corresponds to the most logical work sequence for
machines which have to be completely adjusted. If only speci c individual work steps are
carried out, both the preceding and following chapters must be observed.
Screws, nuts indicated in brackets ( ) are fastenings for machine parts, which must be
loosened before adjustment and tightened again afterwards.
13.02 Tools, gauges and other accessories for adjusting
Screwdrivers withi blade widths from 2 to 10 mm
Spanners (wrenches) in sizes from 7 to 14 mm
Allen keys from 1.5 to 6 mm
Metal rule (part No. 08-880 218-00)
Needle-rise gauge (part No. 61-111 600-01)
Gauge, (top feed stroke 7 mm) (Part No. 61-111 633-61)
Screw clamp (part No. 61-111 600-35)
13.03 Abbreviations
t.d.c. = top dead centre
b.d.c. = bottom dead centre
13.04 Explanation of the symbols
In this adjustment manual, symbols emphasize operations to be carried out or important in-
formation. The symbols used have the following meaning:
Note, information
Service, repair, adjustment, maintenance
(work to be carried out by quali ed staff only)
Page 6
Adjustment
6
13
.05 Adjusting the basic machine
13
.05.01 Positioning the feed dog across the direction of sewing
Requirement
The bottom feed dog must be the same distance from the left and right side of the need-
le-plate cutout.
Loosen screws 1 and 2.
Laterally align rock shaft 3 in accordance with the requirement.
Now tighten screws 1.
The at sides of pins 4 must be opposite the at sides of screws 1 and rock
shaft 3 must exhibit neither play nor stiffness.
Screws 2 remain loose for the following adjustments..
Fig. 13 - 01
4
1
2
3
1
4
Page 7
Adjustment
7
13.05.02 Positioning the feed dog in the direction of sewing
Requirement
With the longest stitch set, the bottom feed dog must have the same clearance the front
and the back with respect to the needle-plate cutout when feeding both forwards and
backwards.
Set the longest stitch.
Adjust rock shaft 1 in accordance with the requirement and tighten screws 2.
Fig. 13 - 02
2
1
Page 8
Adjustment
8
13
.05.03 Height of the bottom feed-dog
Requirement
With the stitch length set at "0", the bottom feed dog must protrude over the needle plate
as high as the teeth when at TDC.
Set stitch length "0".
Bring the bottom feed dog to its TDC by turning the handwheel.
Adjust feed dog carrier 1 (screws 2) in accordance with the requirement.
If required, the feed dog height can be reduced a little on machines without a
bottom feed lifting phase (without P).
Fig. 13 - 03
21
Page 9
Adjustment
9
13.05.04 Pre-adjusting the needle height
Requirement
With the needle bar at BDC, the distance between the needle bar and the needle plate
must be 15 mm.
Move needle bar 1 (screw 2) in accordance with the requirement without moving it
laterally.
Fig. 13 - 04
2
1
Page 10
Adjustment
10
13
.05.05 Centering the needle in the needle hole
Requirement
With the stitch length set at "0", the needle must enter the needle hole exactly in the
middle.
Unscrew vibrating presser 1 and presser foot 2.
Set stitch length "0" and bring the needle bar to its TDC.
Insert a new needle. Loosen screws 3, 4, 5 and 6.
Position the needle directly over the bottom feed dog by turning the handwheel.
Move needle bar frame 7 in accordance with the requirement.
Tighten screws 3, 4 and 5.
Position stop 8 so that it is touching needle bar frame 7 and tighten screw 6.
The movement of needle bar frame 7 in guide 9 and of the top feed drive bars
must not be stiff.
Fig. 13 - 05
2
3
1
9
5
6
7
4
8
Page 11
Adjustment
11
13.05.06 Lifting motion of the bottom feed-dog (This adjustment does not apply for machines
without a bottom feed lifting phase (without P)
.
Requirement
With the needle bar at its BDC, the bottom feed dog must be at its TDC.
With the longest stitch set, the bottom feed dog must reach the top surface of the
needle plate at the same time as the needle point when the handwheel is turned.
1.
2.
Bring the needle bar to its BDC.
Turn feed lifting eccentric 1 (screws 2) in accordance with requirement 1.
In this position, tighten the accessible screw 2 until feed lifting eccentric 1 can be turned
with dif culty.
Turn feed lifting eccentric 1 a little further in accordance with requirement 2.
Tighten both screws 2.
Fig. 13 - 6
1 2
Page 12
Adjustment
12
13
.05.07 Driving motion of the bottom and top feeds
Requirement
With the longest stitch length set and the needle bar at its BDC, the top and bottom
feeds should not move when the reverse-feed lever is activated..
Set the longest stitch.
Loosen screws 1 just far enough so that the feed driving eccentric 2 can be turned on the
shaft with dif culty.
Bring the needle bar to its BDC.
Turn the feed driving eccentric 2 so that its eccentricity is facing downwards.
Now turn it a little in the direction of rotation in accordance with the requirement.
In this position, tighten screws 1.
Carry out a check in accordance with the requirement.
Fig. 13 - 7
1
2
Page 13
Adjustment
13
13.05.08 Hook-to-needle clearance, needle rise, needle height and needle guard
(On Model 1246 make these adjustments on both sewing hooks.)
Requirement
When the stitch length is set at "3" and with the needle rise position set (see table):
the hook point must be at "needle centre" with a hook-to-needle clearance of 0.05 to
0.1 mm;
the top of the needle eye must be 0.8 - 1,0 mm below the hook point;
and needle guard 5 must touch the needle just lightly..
1.
2.
3.
Set stitch length "3" and loosen screws 1, 2 and 3.
Bring the needle to its BDC and slide the appropriate feeler gauge under the needle bar
bearing.
Position the adjustable clamp against the feeler gauge and screw it tight.
Remove the feeler gauge and turn the balance wheel in its direction of rotation until the
adjustable clamp is touching the needle bar bearing.
Needle rise position:
Model B: 1,8 mm after b.d.c. off the needle bar
Model C: 2,0 mm after b.d.c. off the needle bar
1
3
Fig. 13 - 8
1
3
1
1
2
2
3
2
Page 14
Adjustment
14
Move hook bearing 4 in accordance with requirement 1.
Tighten screws 1.
Position the hook point at the needle centre, taking care to ensure that the needle is not
de ected by needle guard 5.
While ensuring that bevel gear 6 is not too close, and that the hook does not have too
much play, tighten screws 2.
Position retaining collar 7 so that it rests on bevel gear 6 and tighten screws 3.
Adjust the needle height in accordance with requirement 2.
Align needle guard 5 in accordance with requirement 3.
On the MA 1246 the linkage rod to the thread trimmer (also see Chapter
13.06.10) must be readjusted if the needle gauge is altered.
1
3
Fig. 13 - 8
1
3
1
1
2
2
3
2
4
6
6
7
5
7
4
Page 15
Adjustment
15
13.05.09 Top-feed stroke
Requirement
At the largest top-feed stroke setting and stitch length " 0", presser foot 1 and vibrating
presser foot 2 must lift 7.0 mm from the needle plate when the handwheel is turned.
Set the largest top-feed stroke and the stitch length at " 0".
Bring presser foot 1 to rest on the needle plate.
Turn the handwheel in the direction of rotation until vibrating presser foot 2 has reached
its highest point.
Turn crank 3 (screws 4) in accordance with the requirement..
Fig. 13 - 9
1
2
3
4
Page 16
Adjustment
16
13
.05.10 Lifting motion of the top feed
Requirement
When presser foot 1 is resting on the needle plate, the vibrating presser foot 4 and the
point of the needle must both reach the needle plate at the same time when the top feed
stroke is set at maximum.
Allow presser foot 1 to rest on the needle plate.
Loosen screws 2 until feed lifting eccentric 3 can be turned on its shaft with dif culty.
Turn feed lifting eccentric 3 in accordance with the requirement.
Tighten screws 2.
Carry out a check in accordance with the requirement.
Fig. 13 - 10
2 3
1
4
Page 17
Adjustment
17
13.05.11 Bobbin-case opener (On Model 1246 make these adjustments on both bobbin openers.)
Requirement
The needle thread must not be clamped between the bobbin-case opener 1 and the bob-
bin-case base 3 nor may it be clamped between projection 4 and the retaining trip of the
needle plate (see arrows).
Thread the machine, insert test material and allow the presser foot to rest on the needle
plate.
Sew a few stitches by turning the handwheel and carry out a check in accordance with
the requirement.
Turn bobbin-case opener 1 (screw 2) in accordance with the requirement.
Fig. 13 - 11
2
3
1
4
Page 18
Adjustment
18
13
.05.12 Safety clutch
Remove the jammed thread.
Press piston 1 and turn the handwheel until hook 3 of pawl 2 clicks into groove 4.
The safety clutch is set by the manufacturer and screws 5 are sealed.
If the thread jams, the safety clutch snaps out to prevent damage to the hook.
A description of how to snap the clutch back in follows.
Fig. 13 - 12
2
1
3
4
Page 19
Adjustment
19
13.05.13 Needle thread tension release
Requirement
With the presser foot raised, both of the tension discs must be at least 0.5 mm apart.
Mittels Handhebel den Stoffdrückerfuß hochstellen.
Druckplatte 1 hinter der Spannungs-Trägerplatte 2 entprechend der Requirement richten.
If the tension is correct, release pin 3 must not be under pressure.
Fig. 13 - 13
2
3
1
The clearance of 0.5 mm is a minimum and can increase to more than 1 mm
when using thick threads.
Page 20
Adjustment
20
13
.05.14 Thread check spring (on the MA 1245 and 1246 without thread trimmer -900/56)
Requirement
The movement of thread check spring 2 must be nished when the needle point enters
the material (approx. 7 mm spring path).
Adjust stop 1 (screw 2) according to requirement.
To adjust the pressure of the spring, turn screw 3 (screw 4).
Due to technical reasons, the length of the thread-check spring path can vary a
little in either direction.
Fig. 13 - 14
3
1
2
4
Page 21
Adjustment
21
13.05.15 Thread check spring (on MA 1246 with thread trimmer -900/56)
Requirement
The motion of thread controller springs 1 and 6 should cease as soon as the needle point
penetrates the material (= about 7 mm spring de ection).
Turn screw 2 (screw 3) to adjust the spring resistance of thread check spring 1.
Turn retainer 4 (screw 5) according to the requirement.
Turn screw 7 (screw 8) to adjust the spring resistance of thread check spring 6.
Turn retainer 9 (screw 10) according to the requirement.
Due to technical reasons, the length of the thread-check spring path can vary a
little in either direction.
Fig. 13 - 15
9
7
8
6
4
1
2
3
5
10
Page 22
Adjustment
22
13
.05.16 Bobbin winder
Requirement
With the bobbin winder switched on, the bobbin winder spindle must engage reliably.
With the bobbin winder switched off, friction wheel 5 must not touch drive wheel 1.
The bobbin winder must switch off automatically when the thread level is approxima-
tely 1 mm from the edge of the bobbin.
1.
2.
3.
Move drive wheel 1 (screws 2) in accordance with requirement 1 und 2.
Move stop latch 3 (screws 4) in accordance with requirement 3.
Fig. 13 - 16
2
5
1
3
4
Page 23
Adjustment
23
13
.05.17 Presser-foot pressure
Requirement
The material must be fed reliably even at top sewing-speed. There mustn’t be pressure
marks on the material.
Turn screw 1 in accordance with the requirement.
Fig. 13 - 17
1
Page 24
Adjustment
24
13
.06 Adjusting the thread trimmer -900/56
13
.06.01 Pre-adjusting the control cam
Requirement
The eccentric bearing-surface of control cam 5 must be laterally in the middle of pawl 8.
With the take-up lever at its TDC, the beginning of the largest eccentricity of the
bearing surface (in the direction of rotation) must be underneath the point of pawl 8.
1.
2.
Remove catch 1 (screws 2).
Remove plate 3 (screws 4).
Loosen the four screws of control cam 5 and screws 6 of retaining collar 7.
Move control cam 5 laterally in accordance with requirement 1.
In this position bring retaining collar 7 to rest on control cam 5 and tighten screws 6.
Bring the take-up lever to its TDC by turning the handwheel.
Turn control cam 5 in the direction of rotation in accordance with requirement 2, taking
care to note that it is touching retaining collar 7.
In this position, tighten the four screws on control cam 5.
Fig. 13 - 18
1
2
3
4
5
6
7
8
5
8
8
5
Page 25
Adjustment
25
13.06.02 Tripping lever
Requirement
In needle rise position, the attened pin of control lever 6 (see arrow) must fall slightly
into the track of control cam 7 when activating lever 8 is activated.
Screw out screw 1 and swing out connecting rod 2.
Loosen screws 3 and 4.
Bring the needle bar to needle rise position by turning the handwheel.
Bring clamp 5 to rest on the right side of the housing.
Keeping this position, move control lever 6 laterally in accordance with the requirement
and then press control lever 6 onto the bottom of the cam track.
In this position, tighten screw 3.
Carry out a check in accordance with the requirement.
Screw 4 remains loosened until the release trip is adjusted.
Fig. 13 - 19
1
3
7
2
8
5
6
4
7
Page 26
Adjustment
26
13
.06.03 Pawl
Requirement
With the cut-off mechanism in resting position, there must be a distance of 0.3 mm bet-
ween the largest eccentricity of bearing surface 1 and pawl 2.
Position the largest eccentricity of bearing surface 1 underneath pawl 2 by turning the
handwheel.
Move bearing bolt 3 (screw 4) in accordance with the requirement.
Fig. 13 - 20
1
2
3
4
1
2
3
Page 27
Adjustment
27
13.06.04 Engaging solenoid
Requirement
In needle rise position and with engaging solenoid 5 activated, there must be a distance
of 0.3 mm between engaging lever 2 and pawl 3.
Bring the machine to needle rise position by turning the handwheel.
Loosen screw 1 until the engaging solenoid can be turned with dif culty.
Manually activate engaging lever 2 so that pawl 3 engages.
Press magneto inductor 4 as far as possible into solenoid housing 5 and move both the
solenoid housing and the magneto inductor in accordance with the requirement.
In this position tighten screw 1.
Fig. 13 - 21
1
3
4
3
5
2
Page 28
Adjustment
28
13
.06.05 Release trip
Requirement
In needle rise position and with control lever 4 engaged, there must be a distance of ap-
prox. 0.3 mm between the bolt of the control lever and the base of the cam track.
Bring the machine to needle rise position by turning the handwheel.
Manually activate engaging lever 1 so that pawl 2 engages.
Taking care to ensure that screw 3 is still loose, press control lever 4 down to the base of
the track of control cam 5.
Maintaining this position, lightly tighten screw 3 while bringing release trip 6 into a
resting position against engaging lever 1 and laterally against control lever 2 in the
direction of the arrow.
By lightly tapping on release trip 6 in the direction of the arrow, while simultaneously
tapping control lever 4, create a distance between the bolt and the base of the cam track
which corresponds with the requirement.
In this position tighten screw 3.
Fig. 13 - 22
1
6
4
3
5
2
4
6
Page 29
Adjustment
29
13.06.06 Engaging lever
Requirement
With the needle bar at TDC and with control lever 3 at starting position, there must be a dis-
tance of approx. 0.3 mm between bolt 4 and the outer diameter of control cam 5.
Bring the needle bar to TDC by turning the handwheel.
Turn screw 1 (nut 2) in accordance with the requirement.
Carry out a check by tapping control lever 3.
Fig. 13 - 23
1
3
5
2
3
4
5
Page 30
Adjustment
30
13
.06.07 Linkage rod
Requirement
When shaft 8 begins its pushing motion, lever 6 must simultaneously lift from stop 7.
Af x ball joint 1 to control lever 3 using screw 2.
Loosen nuts 4 (right and left handed thread).
Bring the machine to needle rise position by turning the balance wheel and activate
engaging lever 5.
Taking care to ensure that lever 6 is touching stop (see arrow), turn linkage rod 7 in
accordance with the requirement.
In this position tighten both nuts 4.
Fig. 13 - 24
1
6
7
2
3
4
5
8
Page 31
Adjustment
31
13
.06.08 Final adjustment of the control cam
Requirement
When control lever 3 is engaged and the needle point is 12 mm above the needle plate co-
ming from its BDC, the motion of the thread catcher 5 must begin.
Bring the take-up lever to just past its TDC by turning the handwheel and loosen the
accessible screws on control cam 1.
Continue turning the handwheel in its direction of rotation until the machine is in needle
rise position and then activate engaging lever 2.
Taking care to ensure that control lever 3 is engaged, loosen the remaining screws on
control cam 1.
Continue turning the handwheel in its direction of rotation until the point of the needle is
12 mm above the needle plate.
In this position, and taking care to ensure that control cam 1 is touching retaining collar
4, turn in the direction of rotation until you feel some resistance.
Fig. 13 - 25
1
3
4
1
2
1
5
Page 32
Adjustment
32
In this position, tighten the accessible screws on control cam 1.
Make the remaining screws on control cam 1 accessible and tighten these as well.
Page 33
Adjustment
33
13
.06.09 Catch
Requirement
With the cut-off mechanism in resting position, there must be a distance of approx. 5 mm
between catch 1 and control lever 6.
Lightly af x catch 1 and cover plate 2 using screws 3.
Move catch 1 as far as possible in the direction of the arrow and then move it laterally in
accordance with the requirement.
In this position, tighten screws 3.
Using screws 5, screw plate 4 on.
Fig. 13 - 26
1
2
5
3
6
6
1
4
Page 34
Adjustment
34
13
.06.10 Connecting rod (for MA 1246 only)
Requirement
When the cutting device is in the off-position, the length of spacer rod 4 should be equal to
the distance between shafts 2 and 3.
Loosen nuts 1 (right- and left-hand thread) when the cutting device is in the off-position.
Measure the distance between shafts 2 and 3.
Rotate connecting rod 4 according to the requirement.
Re-tighten nuts 1.
Fig. 13 - 27
1
2
4
3
1
Page 35
Adjustment
35
13
.06.11 Thread-catcher height (On Model 1246 make these adjustments on both thread catchers.)
Requirement
When thread catcher 2 is pushed forwards manually with the take-up lever at its TDC, the lo-
wer point of the thread catcher must pass 1 mm over the back of hook 4.
Loosen screw 1 enough so that thread catcher 2 can be turned.
Loosen the screws in retaining collar 3.
Bring the take-up lever to its TDC by turning the handwheel.
Move thread catcher 2 in accordance with the requirement.
In this position, and taking care to ensure that retaining collar 3 is touching the shaft
bushing, tighten screws 3 of the retaining collar.
Carry out a check in accordance with the requirement.
Screw 1 remains loosened for the following adjustment.
Fig. 13 - 28
2
4
3
1
Page 36
Adjustment
36
13
.06.12 Knife (On Model 1246 make these adjustments on both knives.)
Requirement
The elongated hole of knife 3 must be parallel to knife carrier 5 and the knife must not
be touching the casting (see arrow).
When the point of needle catcher 4 protrudes approx. 3 mm over the cutting edge of
the knife, knife 3 must just touch thread catcher 4.
1.
2.
Loosen screws 2.
Move knife 3 in such a way that it cannot collide with thread catcher 4.
Taking care to ensure that screw 1 is loosened, manually turn thread catcher 4 in accor-
dance with requirement 2.
Bring knife 3 to rest against thread catcher 4 and align it in accordance with requirement 1.
In this position tighten screws 2.
Screw 1 remains loosened for the following adjustment.
Fig. 13 - 29
2 5
3
1
4
Page 37
Adjustment
37
13.06.13 Thread catcher reverse position
(On Model 1246 make these adjustments on both thread catchers.)
Requirement
At the front point of reversal of thread catcher 3, its rear edge must be ush with the cut-
ting edge of knife 4 (see arrow).
Taking care to ensure that screw 1 is loosened, bring the machine to needle rise position
and activate the engaging lever.
By continuing to turn the handwheel, bring rock shaft 2 to its left point of reversal.
Maintaining this position, turn thread catcher 3 in accordance with the requirement.
In this position and taking care to ensure that there is no horizontal play, tighten screw 1.
Fig. 13 - 30
1
4
3
3
2
4
Page 38
Adjustment
38
13
.06.14 Bobbin-thread clamp spring (On Model 1246 make these adjustments on both clamp springs.)
Requirement
Between clamp spring 5 and the bottom of thread catcher 4, there must be a distance
of 0.3 mm.
At the front point of reversal of thread catcher 4, the points of clamp spring 5 must be
ush with the back edge of catcher 4 (see arrow).
There must be a distance of approx. 12 mm between the inner edge of clamp spring 5
and guide sleeve 7.
The bobbin-case must be able to be inserted and removed from the hook without any
interference.
1.
2.
3.
4.
Align carrier 1 (screws 2) in such a way that it is in the middle of its adjustment range and
parallel to the bedplate of the machine.
Unhook spring 3.
Fig. 13 - 31
1
4
6
2
7
5
4
3
7
5
Page 39
Adjustment
39
Manually pivot thread catcher 4 over clamp spring 5.
Bend clamp spring 5 in accordance with requirement 1.
Hook spring 3 back in again.
Bring the machine to needle rise position, activate the engaging lever and bring the
thread catcher to its front point of reversal by turning the handwheel.
Align clamp spring 5 (screws 6) in the elongated hole in accordance with requirement 2
- if necessary carrier 1 (screws 2) as well.
In this position, and taking care to ensure that carrier 1 is parallel to the machine bed-
plate, tighten screws 2 and 6.
Page 40
Adjustment
40
13
.06.15 Tension release bar
Requirement
With the cut-off mechanism in resting position and the presser foot raised, there must
be a distance of approx. 7 mm between the left edge of release bar 8 and housing 9.
When the point of thread catcher 5 is at the same height as the rear edge of stop trip
6 of the needle plate (see arrow) with the presser foot resting on the needle plate, the
tension discs must be loosened to such an extent that the needle thread can be easily
pulled through them.
1.
2.
Taking care to ensure that the cut-off mechanism is in resting position, raise the presser
foot.
Loosen screws 1.
Set transmission bar 2 (screws 3) to the height stipulated in requirement 1.
On machines without automatic presser-foot lifter (subclass - 911/97), bracket 4
must be unscrewed to obtain access to screws 3.
By turning the handwheel, bring the machine to needle rise position and manually activa-
te the engaging lever.
Fig. 13 - 33
2
3
4
Page 41
Adjustment
41
Allow the presser foot to rest on the needle plate.
By continuing to turn the handwheel, position the point of thread catcher 5 at the same
height as the edge of rear stop trip 6 of the needle plate and press release bar 8 to the
left in accordance with requirement 2 using retaining collar 7.
In this position tighten screws 1.
The eccentricity of retaining collar 7 must be pointing downwards.
Carry out a check in accordance with the requirement.
Fig. 13 - 34
9
1
8
7
5
6
Page 42
Adjustment
42
13
.07 Parameter settings
(only on machines with MA 40 ED Control Unit)
The selection of the user level and the alteration of parameters is described in the sepa-
rate instruction manual for the drive unit.
Further parameters and the description for an internet update of the machine
software and reset /cold start of the machine can be found in the instruction
manual for the control panel.
13.07.01 Parameter list
Group
Parameter
Description
User lever
Setting range
Set value
1
0080002 - 003C ,Bkcatkcab trats rof deepS501
00010002 - 003C ,Bkcatkcab dne rof deepS011
6
0002 - 003C
,B.xam deepS706
081003 - 06C ,B1 deeps gnittuC906
7
700
Needle position 0 (needle reference position)
B, C 0 - 255
*
702 Needle position 1 (needle lowered) B, C 0 - 255 85
703 Needle position 2 (take-up lever raised) B, C 0 - 255 225
705 Needle position 5 (end cutting signal 1) B, C 0 - 255 100
706 Needle position 5 (start cutting signal 2) B, C 0 - 255 85
707 Needle position 9 (start thread tension
release/start thread catcher)
B, C 0 - 255 195
05552 - 0C ,Bpmar noitareleccA227
04552 - 0C ,Bpmar ekarB327
734 Tact output A2 (thread trimming) B, C 001 - 009 0
760 Multiplier for the xed value (200)
stitch count
A,B,
C
0 - 250 5
24 - 1Cssalc enihcam detceleS997
8
800 Rotating direction of the motor C 0 - 1 1
884 Proportional sensitivity of the speed
control unit
B,C 03 - 24 12
897 Variant mini-motor, 1 = long, 2 = short C 0 - 1
1
9
900 Additional P- sensitivity of the
speed control unit
B,C 1 - 24 10
See Chapter 3 Speci cations
*
Adjustment see Chapter 8.05 Basic position of the machine drive unit (in the machine instruction
manual).
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43
14 Stromlaufpläne
14 Circuit diagrams
Reference list for the Circuit diagrams
Circuit diagrams
A1 Control unit MA 40 ED
A2 Control panel BDF S2
A14 Sewing head recognition system (OTE)
H1 Sewing lamp (optional)
H10 LED stitch counter
M1 Sewing motor
Q1 Main switch
S1 Manual backtacking key
S1.1 Pedal speed control unit
S2 Needle position change key
S3 Single stitch key
S6 Start inhibitor (E6 stop)
X0 PC-interface (RS 232)
X1 Motor
X2 Incremental transducer
X2.1 Incremental transmitter adapter
X2.2 Synchronizer adapter
X2.3 Y5-911/.. backtacking device
X3 Speed control unit
X3.1 Y2-900/.. thread trimmer (FS )
X4 A2 control panel plug BDF S2
X4.1 Y4 -910/.. automatic foot lift
X5 Out-/input
X6 Bobbin thread monitor (optional)
X6.1 Y8 Thread tension release
X7 Photoelectric barrier (optional)
X22 Y2 -900/.. thread trimmer (FS )
X24 Y4 -910/.. automatic foot lift
X25 Y5 -911/.. backtacking device
X28 Y8 Thread tension release
X40 S1-3 Control panel
X50 A14 Sewing head recognition system (OTE)
Y2 -900/.. thread trimmer
Y4 -910/.. automatic foot lift
Y5 -911/.. backtacking device
Y8 Thread tension release
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44
Circuit diagram 60.70.70 noisreV 91-191 502-92 Part 1
Page 45
45
91-191 502-95 Part 2 Version 07.07.06 Circuit diagram
Page 46
46
Circuit diagram 60.70.70 noisreV 91-191 502-92 Part 3
Page 47
Notes
Page 48
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