Orion XT10 Plus GoTo using OnStep

thingiverse

My Orion XT10 Plus Conversion to GoTo using OnStep: https://stellarjourney.com My objective was to preserve as much of the original mount's integrity as possible. Every component is designed with Fusion 360. The red bracket and grey stepper pulleys are made from PLA, while the rest is PETG. The mount is controlled by an MKS Gen L board utilizing S109 stepper drivers. The steppers are NEMA 17's, paired with a 100:1 planetary gearbox. The stepper pulleys feature 40 teeth, and the larger pulleys for Alt and Azimuth boast 320 teeth. This setup yields a total reduction of 800:1, resulting in approximately 2 degrees per second of movement. The belts used are 9mm wide GT2 closed-loop belts. A 1/2" x 2 1/2" bolt passes through the middle of the base pulley, while the other four bolts measure 1/4" x 2 1/2". Two nuts are attached to the back side of the optical tube pulley. I'm unsure of their size, but they match the stock handles used by Orion on the XT10 plus. I removed the stock bracket and secured the new one using the original hardware. To access this area, I had to remove the primary mirror. Eight 1/4" x 1 1/2" bolts were used to attach the stepper brackets to the base. The remaining hardware consists of M3 screws and nuts. The electronics enclosure is designed for the MKS Gen L board, a WeMos D1 mini wifi board, and a 40x40x20 blower fan.