:delirious: A reply from myself!! Found the fault - no +5v power to the encoder gnd and +5v Marmelised my phone charger and supplied +5v to pin and gnd - started up adjusted the encoder and bingo up came the actual revs indication about 23 revs higher than programmed. Checked for feedback and revs d...

:delirious: Guys can anyone shine a light on a spindle problem I have a mach3 Orac which ran OK but now has developed a faullt in the spindle speed feedback eadIf I programme 1000rpm the actual speed shows 3003 rpm. It seems that the spindle is turning a outt the correct speed but feedback is way ou...

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Do you still have the spindle encoder strip as mine does not work anymore
Thanks
Paul