Toolboard 1LC - motor oddities

[jens55]

I have a 1LC toolboard that drives an extruder motor. It has lots of torque rotating in one direction and very little in the other direction. I fixed one possible weak crimp but it is still doing the same thing but wouldn't the fact that there is lots of torque in one direction indicate the cable is ok? A second motor behaved exactly the same.
As far as I know, there is one set of driver transistors that are used for both directions with only the timing sequence being different. I did have the mother of all clogs the other day with some TPU but can a frozen motor kill the driver even though it is current limited?
What would make a motor work in one direction but only have weak torque in the other direction?

[dc42]

@jens55 I suspect a fault in the TMC2209 driver. When and where did you purchase the tool board?

[jens55]

@dc42. thanks for your reply. Unfortunately the board goes back to May of 2021 and was ordered from Filastruder.

[jens55]

I hate to admit it.. the issue of the 1LC was an operator problem
An extra '0' had inadvertently crept into a speed setting in a macro and as a result I tried to run the extruder motor at ten times the speed that it was supposed to go. Of course torque went out the window at that point. The macro turning the motor the other way was not affected so there was lots of torque.
<sigh>