- Sun Apr 27, 2014 1:41 pm
#170592
I'm trying to build a MIDI controlled stepper which will spin at frequencies sent over a MIDI channel, e.g. so I can play the Mario theme song on the motor. I just bought the BigEasyDriver and this stepper motor (https://www.sparkfun.com/products/10846), and I'm having some trouble getting the motor to spin at certain speeds. Notes between C5 (~523 steps/seconds) and D6 (~1174 steps/second) seem to work just fine, and I can accelerate the motor into even higher speeds, but I cannot get the motor to run at low speeds. Below ~500 steps/second, the motor just buzzes and twitches, and when it sometimes does catch the rotation direction is random.
Power is supplied by a 12V@2A wall wart that I had laying around. I'm controlling everything with a Teensy 3.1 that is emulating a USB MIDI device, and I have my code on Github here https://github.com/randvoorhies/midimotor. I have played around with the current control pot, but it hasn't helped.
Here's a video I just recorded of the problem: https://www.youtube.com/watch?v=qb8tLPygMF0
Has anyone else had this kind of issue?
Power is supplied by a 12V@2A wall wart that I had laying around. I'm controlling everything with a Teensy 3.1 that is emulating a USB MIDI device, and I have my code on Github here https://github.com/randvoorhies/midimotor. I have played around with the current control pot, but it hasn't helped.
Here's a video I just recorded of the problem: https://www.youtube.com/watch?v=qb8tLPygMF0
Has anyone else had this kind of issue?