Motor Only Moves in One Direction!

Hello!

I'm working on getting my machine up and running using Marlin firmware - but I'm having some problems. The X-axis motor only moves to the left. This is slightly complicated by the fact that I'm using Powerlolu stepper motor drivers

I have searched this forum and tried some of the suggestions with no luck so far -

• I have removed all the endstops and jumped the endstop pins together - sending M119 shows that all the endstops are open
• I have tried using the RAMPSTestCode.pde (everything lights up but the motor only moves in one direction)
• I've even switched out my motors and tried a different RAMPs board.

Does anyone have any experience with the powerlolu stepper driver? I suspect I'm wiring that incorrectly?



I'm particularly unclear about the circled GND and Voltage - I interpreted that wiring diagram as saying that if I'm using an external power supply (which I am - 24V) then don't use those lines at all
Thanks!

Quote
joshuafkon
I'm particularly unclear about the circled GND and Voltage - I interpreted that wiring diagram as saying that if I'm using an external power supply (which I am - 24V) then don't use those lines at all
Thanks!

That is correct.

So, I've been able to get the motor to move in the other direction - sort of. If I switch The AB wires in either of the phases then the motor will move counter-clockwise (but still only that direction)

Marlin will not allow you to move any further in a negative direction than your starting point until you've performed a home. I'm not sure if eliminating your end stops will get around this. I'd put the endstops back in play, enter a home command and trip each end stop manually to see if that gives you freedom of movement.

If you move your motors in a positive direction, can you then move them in the opposite direction back to their starting point - if so then that's normal behavior. If you can't move then back ever, then there is something else that's wroing.