PM932 Noisy motor? At less-than 60Hz

[Djl338]

I have a PM932 with a 3-phase motor from PM and a Teco VFD running it. Below 60Hz, and I mean 58Hz and below it's a little noisy like a clanking sound. Runs fine quiet-ish above 60Hz. Just wondering if that's normal. I did look in the case, nothing broken or obvious.

 

[mksj]

Might be your Group 2 motor parameters, did you set the correct motor parameters. Did you try to run auto tuning of the motor? It would need to be done static (02-07 = 1) unless there is a neutral gear selection. You should be running in SLV mode, not V/F.

To start auto tuning procedure in SLV mode:
- Set motor parameters 02-01 and 02-03～02-06，next set 02-07 to【1】to start the auto tune procedure.
- During the Auto tune the display will show AT and show END briefly when auto tune is completed then the
display will return back to show frequency.
- After a successful auto tune the motor test data is stored in parameters 02-08 and 02-09 and parameter 02-07 is
set back to 0.
Notes:
- Perform an auto tune whenever the motor is replaced.
- Auto tuning is not possible for applications with multiple motors connected to one inverter.
- Auto tune can be used on motors of similar size to the inverter or one size smaller. Make sure to set the correct
motor parameters.
- Parameters 02-00 ~ 02-06 are available both for V/F & SLV mode (Except parameter 02-02 V/f only).

 

[markba633csi]

Perhaps remove the belt and verify the noise is from the motor and not something in the machine rattling

 

[Djl338]

Might be your Group 2 motor parameters, did you set the correct motor parameters. Did you try to run auto tuning of the motor? It would need to be done static (02-07 = 1) unless there is a neutral gear selection. You should be running in SLV mode, not V/F.

To start auto tuning procedure in SLV mode:
- Set motor parameters 02-01 and 02-03～02-06，next set 02-07 to【1】to start the auto tune procedure.
- During the Auto tune the display will show AT and show END briefly when auto tune is completed then the
display will return back to show frequency.
- After a successful auto tune the motor test data is stored in parameters 02-08 and 02-09 and parameter 02-07 is
set back to 0.
Notes:
- Perform an auto tune whenever the motor is replaced.
- Auto tuning is not possible for applications with multiple motors connected to one inverter.
- Auto tune can be used on motors of similar size to the inverter or one size smaller. Make sure to set the correct
motor parameters.
- Parameters 02-00 ~ 02-06 are available both for V/F & SLV mode (Except parameter 02-02 V/f only).

Thanks Mark, I did initially setup with auto tune, but I’ll recheck the servings and check the parameters you posted. Thanks much
david

 

[Djl338]

Markba. No belt on this machine.as I mentioned on the initial post, went through the gearbox and looked at possible problems
thanks

 

[Djl338]

Well, that was an easy fix, which for me is unusual. Went through all of the parameters, and some had changed since setup which I don’t understand. But it switched itself out of SLV mode into VLF ,changed that, reran auto tune and now purrs as much as that machine can purr! Clank-free at low freq.
Thanks guys!