ThisIsJustARandomGuy / dobson-star-tracker

This project aims to enable makers to motorize their dobson-style mounted telescopes using easily sourced hardware
MIT License
38 stars 9 forks source link

Aligning the telescope: How should it work? #1

Open ThisIsJustARandomGuy opened 4 years ago

ThisIsJustARandomGuy commented 4 years ago

I haven't figured out how I want aligning the telescope to work. I'm currently using the following method, but a better way is needed, obviously:

  1. Turn off the power supply to the steppers
  2. Manually point the telescope at a star
  3. Select that star in Stellarium
  4. Click "current object" in the telescope section
  5. Click "slew" and wait for the telescope on screen to point at the correct star
  6. Reconnect the stepper driver power supply
  7. The telescope now knows where it is actually pointing at and can track correctly

Suggestions for the display unit

Suggestions for Stellarium

ThisIsJustARandomGuy commented 4 years ago

There is now a sub-menu called "Set Alignment" within which there is a small list of stars. Select one and the motors of the scope will turn off. Align the telescope manually and click again. If you selected the wrong star, perform a long press of the encoder button to go back. Unfortunately, the alignment will still be lost, since the steppers turn off as soon as a star is selected.

MartinRobomaze commented 4 years ago

Hi, I Recently I got a GOTO scope and looked at it's aligment process. At first it levels itself. It is probably using some gyroscope to do that. After that, it finds north. In this project a gps module can be used to find north. Then it is finding tilt - turns around and measures tilt of the scope. I think this part can be skipped. And after this it chooses two alignment stars. The scope will slew to alignment star and then you would have to put in center the brightest star - the alignment star. I suppose that this is done to improve the precision of object tracking. I assume that some or all of these alignment steps could be implemented in this project. Best regards, Martin.