I recently got TB67S128FTG Stepper Motor Driver Carrier and found the following instructions on the product page (Pololu - TB67S128FTG Stepper Motor Driver Carrier):
“For the microstep modes to function correctly, the current limit must be set low enough (see below) so that current limiting gets engaged. Otherwise, the intermediate current levels will not be correctly maintained, and the motor will skip microsteps”
On the same page, I didn’t find how current limit should be set low enough, in order to have correct microstep mode. Anyone can elaborate how current limit affect the correct operation of microstepping? From what I understood, increase of decrease current limit would simply scale the miscrosepping current proportionally…
In addition, what are the suggested settings for this stepper motor driver, for the purpose of getting microsteps as accurate as possible? My application is a DIY equatorial mount / star tracker which requires high pointing accuracy. Btw, I am using 1/32 microstepping mode on a 0.9deg stepper motor with 3.75x and 120x belt and worm gear reduction, respectively.
Thanks for any support from the community