Hi All. I'm having an issue with our CNC machine. Originally a Marchant Dice but it's becoming a bit like Trigger's broom now.

The stepper motor drivers were burnt out so I've replaced those. A lot of the connections were loose inside the control unit so I've tightened all of those up. There doesn't seem to be any loose connections but don't take that as concrete!

My first question is - is this sound/grinding noise, in the video, familiar to anyone? If so can they shed any light on what it may be?

Its been happening intermittently over the last few months but as of the end of last week, the machine ground to a halt (pardon the pun).

On the video in the link below what you're watching is me moving the y axis using the shuttle express , slow then medium then fast. It works fine going slowly , makes awful noise when moving at medium speed, then won't move at all and makes a terrific noise when the jog dial is at full throttle!

Youtube Video link here

Any help is much appreciated.