Help! Steppers losing steps and making a racket under slow feed..

[fasteddy]

Hi John..

I am not controlling the spindle from the board.. The pulse width thingy may be to do with the wiring setup I have.. Z and y are using the onboard drivers (system3 board), and the x is a pair of PM752 drivers, just wiring the step and pulse into the 4th axis (no onboard driver).. Did not have this setup before, ran all three axis from the board.. This new setup was run from the previous Mach3 settings and had to alter various things to suit.. But the X axis has run flawlessly since I switched it on.. All these problems are to do with the z and y..

Steve..

[John S]

OK, I just mentioned to spindle in passing as it is pulse width sensitive.

Just download the latest version to check and it's impossible to have different pulse widths setup for different axis.

It doesn't matter if you have 15 power supply's or driver, you only have one copy of Mach.

The pulse width setting I'm talking about is in Config > Motor tuning. Step pulse which is slightly to the right at the bottom of the screen. Any alterations HAS to have the save setting button pressed then OK

[fasteddy]

Hi John..

All 3 axis are set to 5 pulse for step and dir..

Steve..

[John S]

Hi John..

All 3 axis are set to 5 pulse for step and dir..

Steve..

OK so we are on the same page here.
I know you can't swap axis over with you having 34's on X but can you set the 752's to a lower setting and put them on Y and Z to check, this will eliminate the step 3 board.

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