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Reviews (10)
Apr 12, 2016
Got this to experiment. (it does not seem useful)
1 of 1 found this helpful Here is my experience using this for camera for a battery powered gimbal (for a light weight camcorder). Its steps are smaller than a servo but they are still not ideal for high zoom operation. Unipolar discrete steps are still still too large.
Torque improved when driving with two coils at a time, but they were still overwhelmed by my 235g / 8.3 oz. camera. (estimate torque of stepper 500g-cm).
The biggest issue I have is the play in the gear drive. When reversing directions, it takes 40-60 steps for the motor to consume the play and affect the position of the shaft. However, keeping positive load mitigates this issue.
I have not tried driving these with over 5 volts yet...
Note: One of these steppers acted like it had stripped gears. I opened the drive to diagnose the issue. The gears had no problems and the motor worked fine when I reassembled the gearbox.
Previous Review:
The driver is simple and just isolates the digital input from the motor circuit. You set voltages of each of the 4 coils. It is geared down so it is slow (maybe 3 rpm at max pulse rate). The only benefit I can see over a servo is accuracy. However, it is easy to make this motor miss steps by stopping the shaft with fingers.
I will not get more. I will probably get geared standard motors (and add feedback sensors) to control duct baffles.
Jan 05, 2017
It does remove some solder, but ...
1 of 1 found this helpful It does remove some solder, but the tip is too fat and melts too easily. It is not very precise.
Mar 14, 2016
They are cheap for a reason.
The strings are too thin for a big viola. My original A string was thicker than the D string in this set. The D string broke right right after I installed it. It was an experiment that failed, and a waste of $7