Cable Puller Motor Speed Problem
By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial Training A contractor for a power and light company was …
Changing Cylinder Size Causes A Drifting Problem
A customer of ours bought a machine that had a damaged cylinder that needed to be replaced. The rod was bent, and they ordered a replacement cylinder with a …
Large Punch Press Cylinder Stutters On Downward Extension
An OEM had a hydraulic distributor design an HPU for a punch press he wanted modified to punch large stainless-steel discs that were then sent to a forming …
Rotating Stage’s Hydraulic Motor Keeps Leaking
A large entertainment stage is rotated by a Geroler type hydraulic motor shown on the circuit. The regenerative center position on the directional valve …
Clamp and Drill Circuit Will Not Release the Part
A new hydraulic system was installed on an old “Clamp and Drill” machine. A PLC would shift a directional valve clamping the part and a proximity switch …
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