Welcome, Guest
Username: Password: Remember me
08 Apr 2018
INDI development team is happy to announce the release of INDI Library v1.7.0. This new exciting release builds on the maturity of INDI Library and comes with many new supported devices and fixes for existing drivers.
Read More...

TOPIC: Astroberry Focuser with Adafruit Motor HAT

Astroberry Focuser with Adafruit Motor HAT 1 month 4 weeks ago #25604

  • Ihoujin
  • Ihoujin's Avatar Topic Author
  • Offline
  • Gold Boarder
  • Gold Boarder
  • Posts: 302
  • Karma: 1
  • Thank you received: 39
SmackAstro. A couple things you might want to customize. Within amh_focusser.cpp
Define SPR to match your motor specs. Kaczorek set it to 400, but most steppers are 200.
Towards the bottom of the file you can define the stepper mode to one of 4 options
SINGLE (lowest power use)
DOUBLE (2x power use, ~25% more torque)
INTERLEAVE (50% more power, slightly more torque than Single, finer step size)
MICROSTEP (Very fine step size)

I recommend microstep, but you will have to adjust the I2C baud rate, see my earlier posts in the thread.

Please Log in or Create an account to join the conversation.

Astroberry Focuser with Adafruit Motor HAT 2 weeks 6 days ago #26434

Hi, i am trying to reproduce this project on my Celestron 8 SE. But i found that Celestron 8 SE, there is no obvious way to measure the focuser tube traveling distance for one knob revolution.
Do you guys know how to work around this problem? is this parameter a must for the program to work?
Thanks.

Please Log in or Create an account to join the conversation.

Astroberry Focuser with Adafruit Motor HAT 2 weeks 5 days ago #26437

  • Ihoujin
  • Ihoujin's Avatar Topic Author
  • Offline
  • Gold Boarder
  • Gold Boarder
  • Posts: 302
  • Karma: 1
  • Thank you received: 39
It is not a must. My discussion on travel distance was to work out an estimate for limits to the maximum number of steps the driver will allow. The author was looking at 20,000 step limit, and I calculated the most I could possibly need, and was satisfied I came within it.

Please Log in or Create an account to join the conversation.

Astroberry Focuser with Adafruit Motor HAT 2 weeks 5 days ago #26438

That's good to hear. I am glad that you are still monitoring the thread.
I need to look at the code more closely to figure out what exactly i need to provide for the focuser to work.

At the Ekos UI side, it looks i only need to set the ticks properties for the Max Travel

Settings
Max Travel: Maximum travel in ticks before the autofocus process aborts.
Step: Initial step size in ticks to cause a noticeable change in HFR value.
Tolerance: The tolerance percentage values decides when the autofocus process stops in the Iterative algorithm.

Please Log in or Create an account to join the conversation.

Time to create page: 0.136 seconds

Login



3rd Party

Choose from the numerous 3rd party INDI drivers to suit your needs!

Got Problem?

Check out the FAQ, the forum, and the bug tracking system to resolve any issues you might have!
You can also subscribe to INDI newsletter and development mailing lists to get the latest updates on INDI!


Gallery

Replica

Why INDI

Replica