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Thanks Martin
Tried it, it is very limited, repeats the whole program, so I will have to break the program down into blocks and run 1 block at a time.

Chris

Hi all, very new to this, Have an ORAC that I have had to convert because like me it is old and it lost its tiny little mind, I forgot EPROMS don't hold on for ever.
With the ORAC I used G73 start...

Perfect, Many thanks for the quick response.

New CNC USB controller Mk3/4 what signal levels are require for spindle encoder and index signal, ENC A, ENC B and IDX,
I presume 5v.
Does it require a negative going pulse or positive
What wave...