Ben
May 13, 2013, 6:41pm
2
Hello.
It sounds like you are being limited by your stepper motor at this point, not the driver (basically, your stepper motor’s rotor physically cannot keep up with the rotating field). The following forum threads have a few tips for maximizing the rotation speed of a stepper motor:
Does the stepper motor turn when you run the code you posted? If so, can you post the faster-step code that did not work?
What do you have the A4988’s current limit set to? Also, I notice that your motor can be used as a unipolar or bipolar stepper; how do you have it connected to the A4988?
Generally speaking, you probably are not going to get more than a few hundred RPM from your stepper motor, but you should be able to do better than 120 RPM. There are a few main ways to increase your ma…
I’m using a #1206 stepper and am wondering what the motor is rated for maximum step frequency (couldn’t find this spec listed anywhere on the product page). Trying to determine max. RPM speed for the motor. I’m using the DRV8825 controller (@ 1/16) and a 12V DC source. Does this have to be kept below 20kHz? I’ve been able to get consistent rotation up to 29.3kHz (17us on/off pulse) but I’m unsure of the stability at that frequency. If set to anything lower (like 16us pulses) the stepper som…
- Ben
