Okay right after a new pic, running loads of test programs and the program itself in fresh air and then coming back down to a dti, and it returns to zero, I decided to run a test part.

Run the test part and I had it skip again argh!

I ran the program in fresh air but this time, I ran it with the spindle on!

And it skipped, so I've come down to interference.

Problem is, all my cable is cy cable, all grounded at one end, checked the earth continuity all is well.

But I have a cy cable on the vfd to motor cable which is earthed at one end and wondered if this could put interference down the earth? I've placed vfd at one end of my garage and the control on the other and currently running the program again so we shall see if I get the same problem.


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