Denford Triac Spindle Issue

[GingerNinja54]

Thanks for replies guys
(I’ve also got the thread running on the Denford forum… my thought was to cast the net wise to try and capture as much input as possible)

I had found fuse #F1 (spindle) to have blown…
I changed for a new 10A (as per wiring diagram I found for this year machine?)

Upon firing up the machine, the spindle ramps up to full revs and back down, to approx. 60-100revs, and stays there.
Once I reference the axis, I can stop and restart the spindle in manual mode, but can’t change the rpm??
I rebooted the machine and the same occurred…
I get 200mV across wires #54 & #55 at all revs.

Could defective brushes cause this?
Or more likely to be a drive issue or other?

@M_C… what was the cost of your drive and spindle, and where did you source this from?