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[diorip]

Hi to all. I'm about to modify my TAL eq mount for goto, using Tom's great AstroEq.
I already have an Arduino mega R3, as well as a pair of tb6600 stepper driver units and nema 23 motors.
From the Mega schematic it looks that I will need to connect only the EN, DIR & STEP leads from arduino to the tb6600 is that right?
Since the tb6600 board has microstepping switches, I will only be sacrificing the microstepping control over astroeq, right?
So how do I proceed?

[TCWORLD]

Hi,

You are correct, only the EN, DIR, and STEP are needed. You'll need to make sure that the enable pin is the correct polarity - when the AstroEQ drives a low (0V), the driver should be enabled.

For microstepping you would set the switches manually, and in the configuration utility select a step mode that corresponds. I'd select the DRV882x from the dropdown even though you are using an external driver. You should also disable gear changing in the configuration utility as the external drivers won't be able to be commanded to change mode.

Kind Regards,
Tom.

[diorip]

Thanks a lot Tom, I guess I' have a couple of questions when I actually have the arguing board in my hands.
By the way, you 've done an EXCELLENT job. Congratulations on your ethos to share your work with the rest of us.