Ioptron IEQ45 mount - NEMA17 stepper bracket - OnStep build
thingiverse
Bracket to mount NEMA17 steppers on Ioptron´s IEQ45-GTN equatorial mount. It´s bolted onto the worm gear assembly, in the place where the old axis control board used to be. It allows for belt tension adjustment by moving the motor up and down. I used 20 teeth pulleys (bore 5mm) in the motors and 40 teeth (bore 6mm) at the shafts (2:1 reduction). There are 2 files, depending on the size of the GT2 closed loop timing belts you´re using, 180mm and 200mm. I recommend using the 180mm due to the lower height, as it can get somewhat close to the scope. FreeCAD files available.
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