I was able to control the focus adjustment of the telescope MAK127SP by the stepping motor which connected to M5Stack. The motor driver is LV8548MC. The stepping motor is attached to the telescope with a mount made of a 3D printer. It seems to be an electric forcer.
The focusing knob of telescope MAK127SP is rotated by a stepper motor that is controlled by M5Stack. The motor driver is LV8548MC. The stepper motor mount is made by 3D printing.
- M5Stack Basic (M5Stack)
- Telescope MAK127SP (Skywatcher)
- Stepper motor MDP-35A (Nidec Seimitsu)
- Motor driver IC LV8548MC (ON Semiconductor)
- Control the telescope's focus knob according to the rotary encoder
- Accurate focus control 1/48 (Full step) or 1/96 (Half step)
- Auxiliary function to find a peak of focus
Focusing on a telescope can be very frustrating. Touching the knob to focus will cause the telescope to shake. Therefore, I created a mechanism that allows you to adjust the focus as much as possible without touching the telescope. Not vibrating experience is very nice, during focusing.
The resolution of stepping control is a little bit rough, I felt. I may need to replace a drive IC or motor itself. Also, when changed the direction, it seems having a delay.
Finding the peak of focus is an additional feature. If it is difficult to find the peak of focus, I usually mark the boundaries where the focus points are out of focus. Then define the center of the mark points on the two knobs as the peak of focus. This program helps it.
Anyway, this system improves the experience of controlling my telescope. I'm going to improve this system.
3D Printer Data: