Stepper driver allowing the stepper to slip when moving.

Hi all,

I've just finished my build (finally) and was about to start the calibration when I noticed one of the steppers (y) was turning, but not actually moving the belt.
Without an pressure on the drive it turns, however the moment any pressure is applied it stays still. Once its stopped it holds (like it should), but the moment its in motion it will slip (its possible to turn it in the opposite direction).
I tried upping the amps, but it still does the same thing. With a different stepper driver it works fine.

Is there anywhere where a solder bridge or lack of solder might cause this? Or is there a general fix?

Thanks in advance,

Joe

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My Reprap blog

jds-reprap.blogspot.com

It's possible that the trimpot that controls the current to the stepper is defective. You can check it with a multimeter when the power is off and it's disconnected.

Easy fix is to return it and get another one.

I ended up buying another stepper driver. I will test the trimpot tonight though.

Thanks

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My Reprap blog

jds-reprap.blogspot.com