Quote Originally Posted by 76special View Post
Update: drag chain swapped out for larger one, limit switch's on X wired in. Checked the spindle and found it wasn't earthed! fixed that and plumbed in water lines & pump.
Bad news - z axis driver died, no smoke or lights, just dead.
Same with VFD (a Chinese YL620-A) had been working OK, but turned it on on morning and got a 1/4 turn and a err4 (IPM Failure)... ordered another one from local company, costs as much as the VFD/Spindle package from china, but here's hoping it lasts longer
The YL620 are not a good VFD Drive, do you have the manual PDF that you can post for the new VFD or the manufacturers name