Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

sgl_imaging_challenge_celestial_motion.thumb.jpg.a9e9349c45f96ed7928eb32f1baf76ed.jpg

Search the Community

Showing results for tags 'replacement control system'.



More search options

  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Content Type


Forums

  • Welcome
    • Welcome
  • Beginners
    • Getting Started General Help and Advice
    • Getting Started Equipment Help and Advice
    • Getting Started With Observing
    • Getting Started With Imaging
  • Community
    • Official SGL Announcements and Events
    • SGL Challenges and Competitions
    • SGL Star Parties
    • Star Parties & Astro Events
    • Celestial Events Heads Up
    • The Astro Lounge
  • Retailers
    • Sponsor Announcements and Offers
    • FLO Clearance Offers
    • Supplier Reviews
  • Astro Classifieds
    • For Sale / Swap
    • Wanted
  • Equipment
  • Observing
  • EEVA (Electronically Enhanced Visual Astronomy)
  • Imaging
  • Science
  • WADAS's WADAS Discussion Forum
  • Beaufort Club's Topics
  • Swindon Stargazers Club's Topics
  • East Midlands Stargazers''s Topics
  • Central Scotland Astro's Topics
  • SGL Cumbrian Skies's Topics
  • Herts, Beds and Bucks Group's Topics
  • SGL East Anglian Group's Topics
  • South Leicester Observers's Topics
  • South Wales Group's Topics
  • SGL Surrey Observers's Topics
  • South Yorkshire Stargazers's Topics
  • Yorkshire Astronomers's Topics
  • Devon and Cornwall's Topics
  • West Midlands's Topics
  • Essex Cloud Dodgers's Topics
  • Essex Cloud Dodgers's New equipment
  • NLO and Planetarium's Topics
  • Astronomical Society of Edinburgh's Discussion
  • Dorset Stargazers's Topics
  • Hairy Stars Club (Comets)'s Tutorials and Guides
  • Hairy Stars Club (Comets)'s General Discussion
  • Hairy Stars Club (Comets)'s Observing Campaigns
  • Hairy Stars Club (Comets)'s Analysis results
  • Hairy Stars Club (Comets)'s Useful Links
  • Pixinsight Users Club's Pixinsight Discussion Forum

Calendars

  • Astro TV
  • Celestial Events
  • SGL Calendar
  • Astro Society Events
  • Star Parties
  • WADAS's Events
  • Beaufort Club's Events
  • Astronomical Society of Edinburgh's Events
  • Dorset Stargazers's Events

Blogs

There are no results to display.

There are no results to display.


Find results in...

Find results that contain...


Date Created

  • Start

    End


Last Updated

  • Start

    End


Filter by number of...

Joined

  • Start

    End


Group


AIM


MSN


Website URL


ICQ


Yahoo


Jabber


Skype


Interests


Location

Found 1 result

  1. I'm looking for some support from other forum members interesting in motor control with encoder feedback to push this little project along ready for the winter season I've just pushed the button on a Skywatcher Star Adventurer astrophotography mount with a view to replacing the electronics with my own control system so it does what I want rather than doing what it thinks I want Looking inside the mount there is a single control board with plug and socket connections to the various components on the mount i.e. the motor/encoder, mode dial, Camera snap port, power switch etc. As supplied the mount works well for astrophotography but is seriously lacking any flexibility or thought when it comes to the timelapse functionality. This project will replace all of the Skywatcher control board including the motor driver and encoder counter, and incorporate a PID controller for position/speed control For me, very basic timelapse functionality would include: 1. Manually define left and right limits for a panning timelapse (fast slew to position camera at start and then finish). Report back defined number of degrees and maybe options to preselect a shoot mode based on frame rate required. 2. Manually select the 'framerate' by entering the total number of frames to shoot while the camera traverses the measured angle in a defined time period. 3. Selection of shot mode, either Move Stop Shoot Move or Shoot on the move. 4. Definable start delay to the imaging sequence. Camera control This should include: 1. User defined shutter durations 2. User defined shoot intervals 3. HDR options, number of frames, only bulb mode maybe with exposures longer than 0.1 seconds for reliability. Potentially an external signal to a dedicated HDR camera controller I already have. 4. Mirror lockup options 5. Camera wake up trigger to handle long start delay For astrophotography I would want 1. Standard Sidereal, lunar and solar rates 2. User definable tracking rates within system limitations 3. Plus the user camera control The 1st step will be to check what control system is in use, I assume PWM and closed loop feedback but need to check that and the nominal motor voltage. The encoder is a 4 wire device so probably power, ground, A & B signals. Once the existing system has been tested, then I'll add an external 9 pin D type connector to the casing to connect my control system into it. I would appreciate any thoughts on the best alternative Motor drive board and encoder counting options from other forum users, arduino maybe? The rest of the project coding is relatively simple once I can accurately control the speed/position of the motor.
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.