Overview FAQs

Frequently Asked Questions

1. Sizing dial, what is it? 2. Why does the reg wheel speed drop? 3. What is centerline height? 4. Diamond offset, What does it do? 5. How do I get straight parts on an infeed grind? 6. Guide alignment, how do I align? 7. Autocycle not repeating? 8. Autocycle will not go forward? 9. Grinding wheel is out of balance all of a sudden? 10. There is a taper on my multiple diameter part? 11. My parts are spinning out? 12. Tachometer is not reading properly? 13. Excessive backlash in my sizing dial? 14. The autocycle blows through load 15. How do I know if my diamond is dull? 16. Why do you dress in one direction? 17. There is a inconsistent dress on my grinding wheel 18. Automatic oiler, how do I adjust? 19. When do I lift the oil plunger on my air dresser? 20. What oils do I use on my machine? 21. Why is oil blowing out of the solenoid in the autocycle? 22. How do you find the flats on the reg wheel spindle? 23. Are my bearings bad? 24. Why is my dresser not moving? 25. How do I adjust my gib? 26. Why does my booster lever not drop? 27. Why does my machine squeal on start up? 28. What is the clunk sound at dress speed? 29. How do I adjust my coolant flow? 30. My part ejector does not work!

1. Sizing dial, what is it?

To adjust grind size of part. The Sizing dial is in 0.001” increments, and the standard indicator is in .0001” increments. To make the part smaller by .001” on the diameter, dial in the sizing dial one line.. Whenever making the part larger, please ensure that you account for sizing screw backlash. This is done by backing out a number of lines, then turning into the desired position.

2. Why does the reg wheel speed drop?

Belts on allspeed drive loose. On new machines belts tend to stretch the jack shaft screw needs to be tightened until the belts are snug.

3. What is centerline height?

See Section 7 in the On-Line Manual for More Details

Work and reg wheels are at a seven inch centerline height from the machined surface of the machine bed. Infeed grinding the height is set by measuring one and one quarter inches from the workrest ear to the center of the part you are grinding. Once this is established the part is then raised one third it’s diameter above the center line. On thrufeed grinding the part should measure one half inch from the thrufeed workrest ear to the center of the part. Then one third it’s diameter above the centerline height.

4. Diamond offset, What does it do?

The diamond offset is used with the centerline height of the part by the amount that the part is above centerline the gauge on the side of the dresser is set to that amount in one thirty seconds increments. This allows the part to have the maximum contact with the regulating wheel.

5. How do I get straight parts on an infeed grind?

Dress both wheels with a infeed template
Check swivel alignment by placing two one inch long by half inch diameter pins on the blade and pinching them between the wheels. The pressure should be even on both pins, if not correct by adjusting the swivel knobs on either side of the swivel ram. At this point a straight part should be ground, if not the dresser alignment should be checked. Refer to manual for proper alignment operations.

6. Guide alignment, how do I align?

Place a straight piece of drill rod close to the same size of the part to be ground on the blade. Pinch the rod in between the wheels. Bring adjustable guides forward till they touch the drill rod. Now with a one thousandth piece of shim stock insert it between the rod and guides move the shim stock from end to end. The drag on the shim stock should be even, if not correct by adjusting the jack screws on the back of the guide. Be careful not to over tighten the center screw as this could put a bow in the guide.

7. Autocycle not repeating?

The gib on the ram assembly is too loose. This can be corrected by putting the machine in automatic and tightening the four set screws on the ram until repeatability is achieved.

The relationship between the positive stop and the micro switch for the dwell is not correct. Remedy this by cycling the autocycle unit closed at this point the seven sixteenths bolt should just make the micro switch, adjust accordingly.

8. Autocycle will not go forward?

Oil in hydrocheck is low. Remedy by filling oil on hyrocheck. (See Diagram Above)
Gib lock on workrest holder is tight with a Thrufeed Set-up the straps should be tight
Gib on ram is over tight with tight straps
Solenoid valve behind the airmotor is defective (See Diagram Above)

9. Grinding wheel is out of balance all of a sudden?

Wheel was not spun out after grinding
Weight is loose

10. There is a taper on my multiple diameter part?

Template alignment is not correct. The Grinding wheel and Regulating Wheel Templates are not "mirroring" each other. Shift the Reg wheel template, and if your machine is not equipped with a Lateral Reg wheel adjustment, re-dress the Reg Wheel.
Blade is not aligned with form in wheels. Loosen the two set screws holding the blade in place, and shift your blade either towards the operator’s side or towards the transmission side of the work rest holder. To determine which way, peer down inbetween the wheels using a step stool. You will be able to determine which way.
Templates or blade worn (visually inspect)
Shift Reg wheel template to properly align grinding wheel template (See Above)

11. My parts are spinning out?

Wrong coolant is being used.
Centerline height is to high (See Section 7)
Bad dress on reg wheel
ON Thrufeed grind, the guides are too far forward

12. Tachometer is not reading properly?

Tach pickup is not set properly, should be one thirty second of a inch from the gear ( on the bottom of the transmission case, there is a sheet metal shroud. Loosen it using an 1/8” T handle Allen wrench. Place a shim under tach pick-up and over the tach gear. Loosen the screw, and retighten, setting the gap. Replace the shroud.
Tach gear is loose (See Above)

13. Excessive backlash in my sizing dial?

Set screw in dial itself is loose
Pull back plate is not set right. Correct by loosening two hex head screws and the split nut, now center pull back plate and tighten, bring split nut up to pull back plate until snug and tighten.

14. The autocycle blows through load position?

Air motor speed must be adjusted accordingly
Air motor settings are set to fast
Micro switch not making with the cam

15. How do I know if my diamond is dull?

While dressing the diamond is humming.
Bad surface finish on part
Heat marks on parts
Wide flaring spark when dressing (diamond contacting the wheel)

16. Why do you dress in one direction?

Dresser is designed so the spring on the quill is decompressed as the dresser nears the operator side of the machine, this also helps with dressing forms in the wheels.

17. There is a inconsistent dress on my grinding wheel

Dressing tube is clogged not allowing coolant diamond to cool properly

18. Automatic oiler, how do I adjust?

A set screw in the center of the plunger can be screwed in for less oil and out for more.
There should be 1" depth on the plunger

19. When do I lift the oil plunger on my air dresser?

NEVER

20. What oils do I use on my machine?

Air dresser oil is Shrader bellows F-422
Automatic oiler for machine ram 10w-30 or way lube
Hydraulic unit DTE-24
Make Sure you Squirt Oil into the Autocycle nut once per day for consistent use.

21. Why is oil blowing out of the solenoid in the autocycle?

Air line automatic oiler is set to high, should be set to drip one drop every twenty cycles. See Item #18 Above

22. How do you find the flats on the reg wheel spindle?

Remove set screws from the reg wheel core, look through the screw holes and turn the shaft until the flats are seen.

23. Are my bearings bad?

Parts being ground are out of round and setup is correct.
Excessive amount of heat on spindle housing

In the case of bad bearings, it is HIGHLY recommended that you send back either the headstock with spindle or the reg wheel housing together.

24. Why is my dresser not moving?

Hydraulic oil is low (Open Filler Cover, for a quick check, put your finger into tank. You should feel Oil. (See Manual for the extensive Check)
Gib on dresser is out of adjustment
Quill is extended past the surface of the wheel. (This will make a loud noise when the quill or side of diamond makes contact with the wheel.)
Defective seals on Cylinder or defective cylinder

25. How do I adjust my gib?

Start with center screws and work your way to the outside screws as dresser is moving. You want to traverse across the dove tails with no binding or slop in the dresser. Disconnect pull back plate, and shift by hand back and forth while adjusting the gib. Do this until there is no play on the slide, reconnect the pull-back plate

26. Why does my booster lever not drop?

The rubber splash guard is not centered on quill
Dirt and grit could be built up in slide, remove and clean

27. Why does my machine squeal on start up?

The spindle drive belts are loose. Tighten the belt tension by dropping the height of the main motor plate.

28. What is the clunk sound at dress speed?

Damaged universal joint, replace.
Loose tach gear or timing belt gear. (See Above #12)
Wear on the top bushing or shaft to the top timing pulley in the transmission Case

29. How do I adjust my coolant flow?

Open coolant valve on rear of the machine. If it still is not good, check rotation of the coolant pump, or clean the coolant system / valve

30. My part ejector does not work!

Plug air line into solenoid on the side of the machine.
Check air pressure into the machine. It should be 60 psi.