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Hi,
I am one of the uStepper developers, and I just wanted to jump into this thread, as I can see there have been some misunderstandings, which I would like to correct
The uStepper (both S and S lite) takes in step/dir/ena signals from any outside controller (as indicated in the picture attached by rthorntn), just like if it was a regular step stick. However, it can also provide these signals from the onboard microprocessor (arduino compatible), or via the SPI/UART bus to the driver chips.
As for the oscillator, the uStepper does NOT use the internal RC oscillator. both versions use a stable crystal oscillator for the clock
whether the uStepper is overkill or not for this particular application is not something i am qualified to have an opinion about, as I don't know anything about the actual application you are discussing. I just wanted to be sure that wrong information about the uStepper is not provided based on false assumptions
Best Regards,
Thomas Olsen
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