| Symptom |
Possible Cause |
Solution |
| Bowl does not turn |
Part jammed in feeder |
Lock-out/tag-out; locate and remove jammed part. |
| Air clutch is not engaged (scallop style feeder only) |
Check air supply; check MAC valve operation. |
| Bowl and disc turn; but parts jam |
Bowl or prefeeder speed incorrect |
Check settings. Correctly set bowl and prefeeder speeds. |
| Incorrect part |
Check changeover settings. Verify the feeder is set up for the part to be run. |
| Tooling or air jets need adjustment |
Check air jet positioning, and refer to your direct supplier’s “As-Built Tooling Documentation” |
| Surface of parts scuffed or scratched |
Particulate in feeder |
Clean feeder bowl and disc to clear any particulate or dust. |
| Parts are scratched prior to feeding |
Check upstream equipment and product supply. |
| Feed rate is too low; parts exit the feeder correctly |
Bowl speed set incorrectly |
Check bowl speed; reset to original speed specifications. |
| Feeder overloaded |
Check the prefeeder speed. Check the prefeeder’s time delay relay. Check bowl level sensor location and operation. |
| Feeder is “starved” for parts |
Make sure the prefeeder is set at the correct rate, and there are sufficient parts in the prefeeder hopper. |
| Air supply is off or not set correctly |
Check the air pressure settings. Make sure air is supplied to the air jets. If air is off, turn it on. |
| Product backs up into the feeder |
Max level sensor not operating |
Check maximum level sensor on conveyor for proper operation. |
| Product upside down exiting feeder |
Air jets or tooling set incorrectly |
Check air jet settings. Check air proximity operation. Check tooling backup ring position (refer to your direct supplier’s “As-Built Tooling Specifications” and/or changeover procedures. |
| Feeder stopped |
Safety door(s), guards or covers are open |
Check all safety door(s), guards, and covers for proper alignment. |
| Max level on output conveyor reached |
Feeder may be designed to stop and start on demand of downstream operations. |
| Product keeps turning around in the bowl but doesn’t come out |
Inhibit gate or inhibit solenoid not operating properly |
Check inhibit cylinder operations; check air setting for cylinder or solenoid |
