Electronics for New Machine + Chinese Spindle + VFD

[mturneruk]

Yep. Steps per are correct. Distance is correct.

I am now suspecting that i might have a faulty UC300. A few minutes ago Mach3 was not recognising the UC300 for some reason when the USB lead was plugged in. I wiggled the lead, restarted the PC, restarted my electronics, but no connection (UC300 power light was on though). So i disconnected everything and took the lid off. Everything looks normal inside my box Checked connections etc. I did notice that the case (which is earthed) may of been touching the outside metal part of the USB connector. I fixed this and plugged the USB in again and it then connection was established ok. Not sure this is related to be honest.

So I did a mid air cut with the spindle and extraction running and that was ok. So then I tried to re-cut the part that screwed up before as a test and not only did i get a few nasty jolty noises during the cut, halfway through Mach disconnected from the UC300 and the job stopped. After that I reconnected the UC300 and tried jogging and doing another midair cut and that worked ok.

All the problems seem to happen when i am actually cutting something and not when jogging / air cuts.

Ideas i have had so far are....

1. Faulty UC300.
2. Vibration from the machine during cutting effecting the electronics somehow which are under the cutting table.
3. Noise. Surely this would effect air cuts as well though.

I have tried several USB leads all shielded and different ports on the PC and that's not the problem i don't think.
Lost at the moment. Any ideas much appreciated.