[HansD]

I have DIY mach3 running cnc for 3 years with no problems - until now:

when I want to move the Y axis (left or right) with the keybord (arrow up/down) it moves randomly in a direction.
The same when I use the home button on the mach screen it moves randomly in a direction - mostly the wrong one.
when I press the same keybord arrow twice (or more) the Y axis moves randomly
Z an X work fine.

I checked the hardware, limiting switches, cables, connectors, even swapped motor drives - no luck

Any idea how to solve?
can it be mach3 is causing it?

Hans

[cncfixxer]

Sounds like your power supplyhttp://www.cnczone.com/forums/newreply.php?do=newreply&p=1472424&noquote=1

[alan_3301]

I would check your direction pins from the computer to the breakout board/drivers.
It sounds like wiring or pin problems, making intermittent contact.
you could measure the voltage at the direction pin on the driver and see if that is the case.

[HansD]

Fixed it.
Cable connector had loose connections (some time ok, moment later no connection) - so I did not know where it was and in what direction to go