is it possible to use the TMC-2208 driver? I have some left over from my barn door tracker. Also a NEMA 17 motor of 0.9 deg/step (400 steps/rev). Reusing these would be great
Cheers , Dave
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TMC-2208 - No
NEMA 17 0.9 - depends on the current rating per coil - well this applies to all stepper motors - the current rating per coil should be < 500mA - why? Well there comes a time when stepping that BOTH coils are on at the same time - meaning current total = 2x and most of these driver chips will overheat and blow up if you try to go above about 1.5A total
If its a high current stepper motor you need to go to the closed loop option.
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Thanks for the reply and discussion regarding the stepper current. I will be checking the data sheet for mine.
Is there a brief reason why the TMC2208 won’t work? I replaced my original 8825 driver with only a few pin wiring changes. I used it in the replacement mode with no programming.
TMC-2208 - No
NEMA 17 0.9 - depends on the current rating per coil - well this applies to all stepper motors - the current rating per coil should be < 500mA - why? Well there comes a time when stepping that BOTH coils are on at the same time - meaning current total = 2x and most of these driver chips will overheat and blow up if you try to go above about 1.5A total
If its a high current stepper motor you need to go to the closed loop option.
I am retired now and living on a pension which means I am not able to go out and purchase things like I used to - hence support for the cheapest driver chips I could afford.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
is it possible to use the TMC-2208 driver? I have some left over from my barn door tracker. Also a NEMA 17 motor of 0.9 deg/step (400 steps/rev). Reusing these would be great
Cheers , Dave
TMC-2208 - No
NEMA 17 0.9 - depends on the current rating per coil - well this applies to all stepper motors - the current rating per coil should be < 500mA - why? Well there comes a time when stepping that BOTH coils are on at the same time - meaning current total = 2x and most of these driver chips will overheat and blow up if you try to go above about 1.5A total
If its a high current stepper motor you need to go to the closed loop option.
Hi Robert,
Thanks for the reply and discussion regarding the stepper current. I will be checking the data sheet for mine.
Is there a brief reason why the TMC2208 won’t work? I replaced my original 8825 driver with only a few pin wiring changes. I used it in the replacement mode with no programming.
Dave
I am retired now and living on a pension which means I am not able to go out and purchase things like I used to - hence support for the cheapest driver chips I could afford.
I totally understand, I am in exactly the same position. I certainly appreciate the work you've done on this and the dew controller.
Thanks for your prompt replies and all the best of the season to you
Dave (from the wet coast of Vanvouver Island where winter means project time, as the clear periods never seem to happen at night...)