Hi Everybody,
I've finally got my printer assembled, and I'm having issues with my stepper motors. I got them from here: [
www.robosprout.com] and I'm driving them with pololus and a Generation 7 1.4 electronics board with a recent checkout of Teacup firmware essentially stock. The symptoms I'm experiencing are as follows and affects ALL steppers, however I'll describe them in terms of the X axis.
If I command the X axis to move left using pronterface, most of the time it will move left something that looks like the appropriate number of units. Sometimes it will be very jerky and may or may not travel the expected distance. With a short distance such as .1 I will hear it engage briefly but usually will not observe any perceptible movement. Following any stepper activity the stepper motor will make a regular "pulse" or "click" of varying volume for a short period (almost exactly 30 seconds). During the pulsing the axle will move a small amount each pulse. Finally, sometimes upon issuing a command the X axis will move the opposite direction of what I requested.
My first question is: is it possible these steppers are wired wrong? I assume that if the steppers were wired wrong I would never get any movement beyond moving between two adjacent steps.
My second question is, what could be causing this issue? I read that adjusting the potentiometer on the pololu to reduce the current could address this issue, but I dialed it all the way to the lowest current, and increased the current until the steppers would move, the pulsing returned before the steppers had enough current to move.
Thanks for any and all help,
Dan
