Hi Martin,

Please forgive my ignorance, but have you set a target spindle speed in the dro before pressing the spindle start button? I was playing around with it for a good hour before I realised I hadn't set a speed, lol! That and what really made a difference was to reset the vfd to factory settings then enter all your parameters fresh, I think there is a certain order it likes it to be done in, I found some instructions that said that and it worked for me anyway. I was ready to throw the damn thing out of the window before I managed to get it going, then its the best thing ever :) Just in case you are experiencing any problems with interference, I used an old serial cable that was shielded, just used 2 cores and grounded the shield to my pc case. Worked very well for testing purposes. My machine isn't to a stage where I can tests its reliability for cutting yet though.

I wish you the best of luck with getting it fully working.