Silly question but have you verified its not single phasing?
Also try running on open loop and see if there is a change, a bad encoder can also cause this. What is the bus voltage?
Correct wasn’t single phasing when it ran the few times. This was my next step once I get it going again. If I recall my glance was around 700 at idle (mind you I’ve seen a few drives past few days so I may be wrong)
Ya that U15 is a bitch. I keep some on the van. In my experience if you change a parameter on an IMC controller there’s about a 50-50 chance you’ll get a checksum error and have to replace that chip.
And for the original issue, is that what the drive says? If it is, does a clamp meter agree?
Hopefully I’ll find out tomorrow, I have some new chips to get it running to continue trouble shooting
