[RonkPM]

Hello all,

My Series 3 won't respond to any speed changes sent from PP or manually from the front control panel. The spindle will turn on using either control, but it goes right to full speed with the VFD frequency at 170 Hz and I can't get it to go any slower. I have checked for loose or broken wires, but nothing stood out. I haven't updated PP recently and the mill was working fine last week before I started installing a Renishaw OMP-2 probe/OMM and a MI12 control box. The only wires that I have touched in the cabinet when doing that is pins 4 and 5 on the DIN jack on the front panel and running power wires to a 24v power supply that I put in. I spent half the day yesterday searching and couldn't find any ideas or fixes for this. I appreciate any insight y'all might have, thanks!

[RonkPM]

I found the issue. It was the 5v pwm wire going to the VFD. Somehow it wasn't making a good connection, removing it and re-installing it seemed to do the trick. I'll probably end up just re-running a new wire and deep inspecting the VFD terminal to make sure it is solid.