Harig AUTOMATIC PLC User Manual

AUTOMATIC PLC

SURFACE GRINDER

Harig Products, Inc.

1875 Big Timber Road

Elgin, IL 60123

Phone [phone]

Fax [phone]

1

TABLE OF CONTENTS

Section Page #

Important Safety Information 3

Grinding the Bottom of Your Chuck 4

Customer Preventative Maintenance Checklist 5

Automatic Diagrams 6

Installation 7

Grinder Spindle Motor- Oil Pump 9

Machine Operation- Power On 9

Longitudinal Feed 9

Crossfeed 10

Coolant 10

Elevating Mechanism- Downfeed 10

Table Park 10

Changing the Direction of the Table Park 11

Grinding Wheel Mounting 11

Grinding Magnetic Chucks 11-12

Maintenance 12-13

Troubleshooting 13-14

Chatter or Vibration Marks in Finish 14-15

Longitudinal Lines—Scratchy Finish 15

Inaccurate Grinding 16

Motors Do Not Run 17-18

Oil Dripping 18-19

Uneven Down feed Response 19-20

Improper Longitudinal Feed 20-21

Crossfeed Malfunction 21

2

IMPORTANT SAFETY INFORMATION

We at Harig Products, Inc. go to great lengths to make our products as safe as possible;
however, the possibility of injury still exists while operating machinery.

In virtually every case, injury is the result of:

 Not knowing how to properly operate the machine.
 Not following proper operating and safety procedures.
 Carelessness or inattention.
 Poor maintenance.

For your personal safety, and in order to get the maximum efficiency out of your new
Harig® Surface Grinder, carefully follow these guidelines:

 NEVER operate the machine without safety glasses.
 NEVER operate machine without the wheel guard in place.
 DO NOT wear loose clothing, jewelry or any or other object that could become

entangled in the machine.

 ALWAYS wait for the wheel to stop before bringing your hands to the table or

work piece.

 MAKE CERTAIN work piece is SECURELY held in place.
 NEVER attempt to hand hold or hand feed a work piece.
 NEVER exceed the machine’s capacity.
 Refer to the proper ANSI / OSHA Safety Codes for the care, use, and testing of

grinding wheels

 Stop the machine and correct any malfunctions immediately (see Maintenance

manual or contact your supervisor).

 Lock the table when you are not grinding.
 Inspect and maintain the machine by a schedule.
 If an electrical problem is suspected, contact a qualified maintenance individual.
 Read your operations manual carefully before operating your machine.

THE FOLLOWING VIOLATIONS WILL VOID YOUR WARRANTY

 Using anything other than Harig® Way Lube Oil™ (Single Gallon, Part No.

16211245)

 Alterations to the following parts: CASTINGS, ELECTRICAL,

LUBRICATION, COOLANT and HYDRAULICS

Although reasonable care has been exercised in the preparation of Harig Products,
Inc. manuals to make them complete and accurate, they do not claim to cover all
conceivable circumstances or applications.

3

GRINDING THE BOTTOM OF YOUR CHUCK

ANY MAGNETIC CHUCK INSTALLED WITH AN UNTRUE BOTTOM CAN

DISTORT YOUR SURFACE GRINDER TABLE AND EFFECT THE

PERFORMANCE OF YOUR MACHINE FOR LIFE.

In order to achieve the maximum performance of your new Harig® Surface Grinder,

carefully follow these instructions on how to grind the bottom of your magnetic chuck:

1. First, in order to determine if the center of the chuck is high, place the chuck, top

down, on a surface plate. Using a .0001 indicator, press on the chuck in different
areas to check for uneven areas. If you experience rocking you will need to shim
one end so that the chuck will be stable while grinding.

2. To prevent the chuck from further moving while being ground, block each end.

Do not clamp the ends or hold the chuck in place by energizing the chuck
because warping may occur.

3. Using a general-purpose, medium hardness, 46-grit type grinding wheel, wet

grind the chuck with a non-nitrate coolant.

4. Keep your table speed at 20 surface feet. Also keep in mind, the depth of your

cut will vary depending on the grit of your wheel and how much crossfeed is
used.

Once the bottom of the chuck is flat proceed to “Grinding Magnetic Chucks” on page 11

for instructions on how to properly grind the top surface of your chuck.

4

CUSTOMER PREVENTATIVE MAINTENANCE CHECK LIST

Daily:

□ Check the way lube level. Fill as needed.
□ Check the ways for proper oiling. If more oil is needed, turn oil adjustment

control 1/8 of a turn, observe performance and increase if needed.

□ Clean machine with vacuum and/or treated dust cloth. (Caution: Do not use air

blast.)

□ Check the lube lines for leaks.
□ Check the table for smooth operation; make sure there is oil on the ways. Check

the operation of the coolant pump. Clean the tank and change the coolant if
needed.

□ Check the spindle for noisy operation.
□ Make maintenance recommendations for any potential problems found.

Every 1000 hrs of run time:

□ Clean the oil pump filter, clean the reservoir and change the oil.
□ Check the lube lines for leaks.
□ Check the hydraulic pump pressure, fluid level and filter. Clean the filter if

needed. Harig® Hydraulic Oil, Single Gallon- Part No. 16211213

□ Check the axis belts.
□ Check the axis motors for noise or excessive heat.
□ Make maintenance recommendations for any potential problems found.

Every 5000 hrs of run time:

□ Replace the Hydraulic Oil. Harig® Hydraulic Oil, Single Gallon- Part No.

16211213

Every 6 months:

□ Check the level of the machine.

5

AUTOMATIC DIAGRAMS

The main Power switch is located
on the right side of the stand.

Be sure to have this switch turned
“ON”, then momentarily turn the

Power

On/Off

“Power” switch on the front panel
to the right to begin operation.

Switch

Front
Panel

Table

Spindle

Crossfeed

Crossfeed

Thumbwheel

Power

Coolant

Hydraulic

Emergency Stop

6

INSTALLATION
Step 1. Do Not Remove the Skid

Do not remove the skid until the machine has been moved adjacent to its installation site.

Step 2. Lift the Grinder From the Skid and Position

Before moving the elevating hand wheel (Fig. 2, B) to remove the wood brace between the table

and spindle housing, remove the plastic temporary dust cover from the top of the column and
slowly pour 2 ounces (1/4 cup) of way oil (the gallon container in the “standard accessory box”)
over the bevel gear.

2.1 Place a ¾” steel bar through holes near bottom of grinder base.

2.2 Attach an 1800 lb. lifting strap to the ends of the bar and join near the top of column. Strap to

the top of column. Pad the machine adequately to prevent damage to finish (Fig. 1)

2.3 Remove the four ½-20 head bolts holding the base cabinet to the skid. Caution: Do not lift by

the motor, spindle, table or saddle.

2.4 Lift slightly from the skid. Loosen the cross feed lock thumbscrew (Pg. 10, Fig 6). Balance

the machine by turning the cross feed hand wheel. For safety, support the machine on two 4ft.
pieces of 4 x 4 while installing leveling legs.

2.5 Screw the 4 leveling legs (located in “standard accessory box”) into the holes in the base of

the cabinet to project 5/8” below the bottom.

Step 3. Position the Machine

Position your machine where desired. No special pad, floor reinforcement or drip pans are
required.

Step 4. Clean the Machine

Remove the grease from table hand wheels and exterior surfaces with clean rag. It is not
necessary to disassemble anything, as all interior surfaces are factory prepared. Do not use
solvents or abrasive that may damage machine’s finish.

Step 5. Level the Machine

5.1 Crank table all the way to the right and all the way toward the column.

5.2 Raise the left front leveling leg ¼” off the floor.

5.3 Place a level on the table platen and adjust the three remaining legs to level the table in both

directions.

5.4 Lower the left front leg to floor and give it an additional 1/8” turn.

Step 6. Assembly

Use (3) round head screws (furnished) to fasten Elevating Screw Guard to Column Cap (Fig. 2,
A)

A

B

7

Step 7. Wet Coolant

Assemble as per instructions packed with the system.

Step 8. Lubrication

8.1 If needed, fill the lube oil reservoir. (Cup at rear of machine). Add way oil from the gallon

furnished to bring the level to up to nearly full. (Fig. 3)

8.2 Ways and feed screws are automatically lubricated.

8.3 Spindle and motor bearings are permanently lubricated.

8.4 The rack and pinion longitudinal table drive was greased at the factory. Add small amount of

grease to the rack each month.

Step 9. Electrical Connections

CAUTION: To prevent personal injury, or extensive machine damage, all electrical services

must be performed by an authorized Harig

® distributor.

Violation will void the warranty.

9.1 Ground the machine by connecting the green wire to a satisfactory ground. Neither the
building structure nor a hot water pipe is a satisfactory ground.

If a satisfactory ground is not available, drive an 8-foot copper ground rod into the ground and
securely clamp the ground wire to it.

9.2 Compare the rating label on the back of the spindle motor with your house current to make

certain they correspond.

9.3 Turn the main power disconnect handle to the “OFF” position and loosen the ¼ turn screws.

Open the control compartment.

CAUTION

any connectors to electronic logic units. Failure to observe this precaution may result in
permanent damage to the unit.

9.4 Bring the main line through the knockout on the back of the cabinet. Connect to the top of

the fused disconnect block.

9.5 Remove the wheel from the spindle.

9.6 Stand in front of the machine and turn the spindle motor ON. It should ROTATE

CLOCKWISE. If not, switch any two line wires to fused disconnect block. (DO NOT switch
motor leads, as this will damage hydraulic system by making it run backward.)

: Make sure the machine disconnect is turned OFF before plugging or unplugging

Fig. 3

8

SPINDLE MOTOR-OIL PUMP

The spindle motor is turned on by momentarily turning the “Spindle” button towards the ON
position. This also starts the oil pump of the lubricating system. After ½ minute the oil level
should rise to the mid-point of the sight glass in the column cap of the machine. The spindle and
oil pump are stopped by momentarily turning the “Spindle” button towards the OFF position, or
pressing the “Emergency Stop” button. (Pressing the emergency stop button will also stop the
hydraulic and cross feed system motors if they are running.)

MACHINE OPERATION- POWER ON

Turn the main switch clockwise to apply power to machine. (Be sure the “Emergency Stop”
buttons are not illuminated.)

LONGITUDINAL FEED

Warning: When first starting the table to run automatically, make certain the proximity sensors

are between trip dogs. To connect the powered longitudinal feed, crank the table to right as far as

it will go. Bring the locking lever (Fig. 4, A) forward and down into the pilot nut on the end of
the cylinder rod. Be sure the lever is seated all the way into the groove. Adjust the two dogs (Fig.
5, C) to within a few inches less than the desired table travel. Turn the hydraulic button towards
the ON position. Disengage the handwheel by loosening the thumb screw (Fig.4, B) on the left

side of cross travel saddle and pull the longitudinal feed handwheel out about 1-1/4 inches

(Fig.5, A). Momentarily turn the “Table” button towards the ON position. (The handwheel
electrically locks out the hydraulic feed when engaged.) Once the table is started, the control

will keep track of directions and reversals until the main disconnect is turned off, even if the
proximity switch is tripped while moving the table manually. The table will now power feed

(back and forth) at a speed determined by the speed control knob. (Fig. 5, B). The maximum

feed rate will be 70 feet per minute. Turning the knob clockwise reduces the feed rate. When
grinding a piece at the full length of the chuck it may be necessary to readjust the table reversing
dogs, to prevent the table from hitting the internal table stop. To convert grinder back to hand
feed, stop the table by momentarily turning the “Table” button towards the OFF position. Turn
off the hydraulic system by momentarily turning the “Hydraulic” button towards the OFF
position. Re-engage handwheel. Crank table to right until the table hits the internal stop. Lift up

the locking lever (Fig. 4, A) to clear the pin and flip it back to its disengage position.

Note: The speed control valve should be rotated fully counterclockwise in order to permit

manual movement of the table via the longitudinal feed handwheel. It is a good practice to
distribute oil evenly over entire length of ways before using grinder. Simply turn on spindle and
run table back and forth a few times. (The “Spindle” control activates oil pump.)

Fig. 4 Fig. 5

9