air feeder machine for stamping press

1. Feed and stock clamps work, but slide block does not move when actuating valve is depressed.

  • Pilot operated valve is stuck, either by grit, swollen nylon or swollen “O-rings.

2. Excessive leakage of air from exhaust hole beneath speed adjusting screw when actuating valve is in up position.

  • Poppet not seating on bottom of cartridge hole – check for grit or chips Note: Refer to Rapid-Air exploded parts drawing of Air Feeds to identify item numbers listed below
  • Leaking “O” rings and check for wear.

3. Excessive leakage of air from exhaust hole, also sluggish operation of feed clamp pistons with actuating valve in up position.

  • Leaking of “O”rings & check for wear.

4. Excessive leakage of air from exhaust hole when actuating valve is in down position. (Note:a slight amount of air leakage is normal in this position.)

  • Tight “O” rings or grit around pilot operated valve may prevent it from moving it’s full stroke.
  • Worn poppet.
  • Poppet is install backwards.

5. Stock clamp does not move up and down when actuating valve is depressed. Other operations appear normal.

  • Worn “O”ring around O.D. of stock clamp pistons.

6. Excessive leakage of air from actuating valve vent hole when actuating valve is in the up position.

“O” ring beneath actuating valve retainer is leaking. Install “O”ring beneath retainer, not in air groove.

7. Gradually reduced speed.

  • Lack of oil.
  • Low viscosity oil.
  • Speed adjusting screw turned in too far.
  • Oversized poppet.

8. Excessive leakage of air from pilot operated valve vent hole on side of feed.

  • Leaking of “O”rings items

9. Cushion pistons act too slow and provide too much cushion.

  • Excessive oil, reduce supply.
    10. Mist of oil coming from exhaust hole.
  • Excessive oil, reduce supply.

10. Feed has difficulty pushing last part of progression.

  • Feed is not in line with die. A slight angular adjustment of the feed will reduce the binding of the stock on the die, guides.

11. Under feeding.

  • Insufficient air pressure.
  • Feed is not in line with die.
  • Stock and feed clamps are loose.
  • Feed is not lubricated.
  • Stock excessively dirty – dirt maybe present between slide block and main body.
  • Feed may be feeding before punches are clear from stock or die. Adjust amount of depression of actuating
  • Feed may be operating too slow. Turn speed adjusting screw counter-clockwise to increase speed.
  • Cambered stock. Use special stock clamp.
  • Interference of feed clamp pistons not allowing sufficient clamp pressure. valve.

12. Over feeding.

  • Stock is excessively dirty or oily.
  • Feed is operating too fast. Turn speed adjusting screw clockwise to slow feed down.
  • Stock has large slitting burr. Check clearance between clamps and stock.
  • Stock and feed clamps may be loose.

13. Slide block will move out but will not return without hesitation.

  • Check speed adjusting screw.
  • Check pilot operated valve. Swollen “O” ring could be binding, until pressure build up breaks it free. Check poppet.

14. Feed acts sluggish on start up, acts fine after running for a while.

  • Check pilot operated valve for “O”ring binding. Valve should move freely in cartridge