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I am currently using the DRV8825 (https://www.oyostepper.es/goods-887-5-PiezasPaquete-DRV8825-M%C3%B3dulo-de-controlador-paso-a-paso-con-disipador-de-calor-para-impresora-3d-Reprap.html) in some prototype electronics that include sensitive analog imaging electronics. Imaging systems have noise levels in the 10s of μV range and my stepper motor drivers are injecting noise through a common PSU. Now, I did design the circuit correctly, using a good LDO to power the imaging sensor, using ferrite beads and plenty of decoupling, but there is some noise coupling there.
I do have some ideas on how to improve this from a PSU architecture perspective, but I wanted to explore the idea of a linear stepper motor driver driven by a high frequency PWM generated by an FPGA that is filtered to a sine wave. This would drive a class AB amplifier stage or buffer for the stepper motor. The motor is a small NEMA 11, running at reasonable RPM and very light load, so it only consumes 1-2W.
Ideally, I'd like this circuit to be around $2 in 1k quantity. I think the best route might just be some discrete transistors in a class B setup. Does anyone have experience with this? Is this something a fool would do?
Thanks! | Posted: Topic Replies: 0, Topic Views: 96 |  | Hi,
I know this is not the right forum to discuss this, but I really hope to get some expert advice.
We have a conveyor application where positioning is not important. The required torque is 98.0 mN.m. The shaft should rotate at an average of 30 rpm. So a geared DC motor or a stepper motor (https://www.oyostepper.es/) can be used. But I would like to know more about the following points
1. Power consumption.
2. Reliability of the drive, i.e. lifespan.
3. Size and weight.
4. Driving cost.
5. Ease of control. | Posted: Topic Replies: 0, Topic Views: 255 | | Hello, I am interested in using a bipolar stepper motor: https://www.oyostepper.es/category-13-b0-Motor-paso-a-paso-bipolar.html
Recently I need to build a new machine and someone suggested to use a 24V power supply. If I use a 12V power supply instead, will it be ok? If so, what difference will I see? (Lower torque? Lower speed?) Thanks in advance. | Posted: Topic Replies: 0, Topic Views: 379 | |
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| Invelos Forums->Posts by Mason04 |
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