Good Evening ,
I have a Powerflex drive that has been running steady at about 39 Hz for years , but is beginning to swing 39.6 Hz , 40.5 Hz , 38.6 Hz , etc. Steady speed on this machine is important . What do you guys think could cause this , bad bearing , the drive , etc. ? I imagine the Frequency Command could cause it , but it is just a constant number from a recipe . Most likely, I think it would be bad bearings , motor , gearbox , etc. , correct ?
For educational purposes , what would the frequency drive be trying to do , by swinging within this range ? I imagine it would be increasing speed or torque , to overcome a restriction , then it lets go , so now it needs to cut back , correct ? Sometimes these issues seem difficult to find , with bearings , rollers , etc.
Thanks so much for your help .
I have a Powerflex drive that has been running steady at about 39 Hz for years , but is beginning to swing 39.6 Hz , 40.5 Hz , 38.6 Hz , etc. Steady speed on this machine is important . What do you guys think could cause this , bad bearing , the drive , etc. ? I imagine the Frequency Command could cause it , but it is just a constant number from a recipe . Most likely, I think it would be bad bearings , motor , gearbox , etc. , correct ?
For educational purposes , what would the frequency drive be trying to do , by swinging within this range ? I imagine it would be increasing speed or torque , to overcome a restriction , then it lets go , so now it needs to cut back , correct ? Sometimes these issues seem difficult to find , with bearings , rollers , etc.
Thanks so much for your help .