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Author Topic: DIY stepper-servo  (Read 5283 times)

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DIY stepper-servo
« on: April 28, 2023, 01:53:31 AM »
I've recently seen a new type of stepper driver board that has a solid-state rotary encoder chip fitted.  The boards fit on the back of a stepper which has to have a shaft extension, on to which is fitted a small magnet.  These encoder chips (from Broadcom for example) can have extraordinary resolution and accuracy at low price.  See for example here:


The result is a stepper-servo drive in effect, though you have to do your own "system integration".

Does anyone have experience with these please?

Offline Graham Waterworth

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Re: DIY stepper-servo
« Reply #1 on: April 28, 2023, 10:35:23 AM »
Yes I have played with them, not very good, very high latency, press jog and wait for it to move then wait for it to stop, The PID tuning is a real pain.

If you find different let me know what you did.
Without engineers the world stops
Re: DIY stepper-servo
« Reply #2 on: April 28, 2023, 02:18:03 PM »
Thanks Graham - noy encouraging!  I think I'll pass...