How to make a self-made hoshino equatorial instrument?

The method of self-made star field equatorial telescope;

Materials used: aluminum (the appearance is as simple as possible, and the most important thing is to ensure the tracking accuracy), a set of common declination meter (including tripod), 5 1 single chip microcomputer, stepping motor controller (driving board), 1/30 deceleration stepping motor, and 65438+5mm-6mm coupling.

Equipment used: CNC milling machine, CNC lathe, bench drill, etc.

1: The motor adopts a two-phase 42 stepping motor with an external harmonic reducer, and the reduction ratio is 1: 100 (PS: the five-phase motor driver is too expensive);

2. The stepper motor driver adopts 128 subdivision 3 128A high subdivision stepper motor driver, and the mounting holes of the motor and the polar mirror are all clamped on the CNC milling machine at one time, thus ensuring the coaxiality requirements of the motor rotating shaft and the polar mirror;

3. The aluminum block and the tripod head are connected by M6 screws (actually, three screws are used to ensure that the aluminum block will not rotate around the Allegro on the tripod at some special angles due to its own weight);

4. At present, all the processing has been completed, and the next step is to control the stepping motor with 5 1 single chip microcomputer (this is very simple, just calculate the required pulse frequency and let the single chip microcomputer send out pulses);

5. When the weather is fine, the test can generally achieve 200mm focal length tracking 10 minutes without pulling the cable, even if it is successful.