Thanks for the replies guys. I checked the limit switches and neither axis had reached the limits. I was about to swap the axis boards but they are no both dead with no power to them. The spindle also does not work although the manual switch is clicking the relay. I though it may be a fuse but I hav...

Hello Emgee. Thank you for posting your replies. I eventually traced the loud buzzing to the toroidal transformer. I guess the plates are vibrating wildly but with continued use it has slowly quietened down to a very low audible hum. I have used the manual buttons like you said but the X axis will n...

As a newbie to this great site I am in need of some help. With such a wealth of info on this site I am hoping someone can help me. Just bought a 1983 Orac from my local engineering company who bought it many years ago but never used it so although it was covered in filth it is pristine underneath. I...