Lost DIR control on X axis
February 11, 2014 02:57PM
Hi,

I'm running a prusa mendel with RAMPS 1.4.

During a print, my x-axis started acting up amd offset mid-print.

Now I no longer have DIR control on my x-axis
Pos and Neg move in the same direction.

I thought it was the stepper motor controller chip, but it is not
I've swapped the chips into various spots. Everything else always works fine and the X axis always has this issue.

Everything else on the machine seems to be working correctly.

Anyone have any ideas on how to fix this?

Thanks!
Steve
Re: Lost DIR control on X axis
February 11, 2014 03:27PM
Had a similar problem in the post. Was a broken wire for the stepper
Re: Lost DIR control on X axis
February 11, 2014 04:59PM
I thought about that. But when I connect that motor to the terminal for.a different axis it works fine
Re: Lost DIR control on X axis
February 11, 2014 05:12PM
Is the end stop for that axis functioning correctly? Are you using Ramps, and if so, have you checked that the pin that connects the addition to the ramps board is making good contact? You should be able to probe the DIR pin on the stepper, the ramps board and he radii no and see where it is failing.
Re: Lost DIR control on X axis
February 11, 2014 05:37PM
I am using a ramps 1.4. The connection between the dir on the stepper controller and board seems good. I've also tried several stepper controllers

Im fairly new to electronics, so I'm sure sure of the exact process of probing the pin to find the fail point.
Can you suggest a resouce that might contain those steps?
Re: Lost DIR control on X axis
February 11, 2014 05:59PM
Also, the X axis end stop appears to be working correctly.
Re: Lost DIR control on X axis
February 13, 2014 03:00PM
Cold solder joint on the ramps board to the connectors for the X-Axis stepper stick socket?
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