Opticon Perceptor telescope rotating motor bracket

thingiverse

This is a stepper motor mount for Opticon Telescope designed to rotate in sync with Earth's movement. All solutions are combined from four parts: 1. A large gear that fits onto the telescope's stand, made from Pulley_GT2_3_108-tooth_102mm.stl and Pulley_GT2_3_108-tooth_102mm.scad designs. 2. The 28byj-48 motor itself. 3. A small gear attached to the motor's shaft, created using 28byj_gear.stl design. 4. A bracket mount for the motor that fits onto the lower part of the telescope's stand, printed from bottom_motor_bracket.stl and teleskop2.FCStd files. This setup will enable moon observation without manual telescope adjustments. Please note that the small gear must be scaled up in height (Z-axis) to double its original size of 8mm. Also, consider printing at a slower pace of 30mm/s for better results. As evident from the pictures, the current height is insufficient. The bracket can be printed without supports since it will be printed upside down. All components can be printed using regular PLA with an infill percentage of at least 15%. To attach the bracket and big gear, a small amount of grease may be needed on the inner circle. The dimensions are designed to fit snugly into the telescope's stand with minimal force required. Of course, the motor needs to be controlled somehow. I used a ULN2003 driver connected to an ESP32, but any Arduino can also work for this purpose. Incidentally, does anyone know how many degrees per minute Earth rotates?