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_banner_solar_25_winners.thumb.jpg.fe4e711c64054f3c9486c752d0bcd6f2.jpg

Sign in to follow this  
  • entries
    8
  • comments
    16
  • views
    173

Magnetic coupling

Sign in to follow this  
markse68

94 views

Initially I planned to make the focus motor quick release and the magnetic coupling made some sense but I ended up going for a simple screw mounted motor so it makes less sense now 🤔 But it’s done now and it works really well- better than I’d expected. It allows for lateral misalignment yet is a nice stiff rotational coupling for the sort of torque required to turn the moonlite knob. A ptfe pad keeps the magnets slightly separated so the two plates can move a little easier against each other. The black magnet holder on the focus knob is 3D printed and a press fit on the knob

C2C54401-DDD8-4792-8C85-3C8B376AEB54.jpeg

78E339D5-833A-4DC9-9860-E7BA1A36064E.jpeg

  • Like 1
Sign in to follow this  


4 Comments


Recommended Comments

Interesting. Did you consider using a cheap magnetic clutch then ? E.g off for manual and on for controlled ?

Share this comment


Link to comment

Hi skybadger,

No I didn’t- the motor is very easy to back drive when de-energised so I’m just going to fit a another knob to the other end of its shaft for manual use. Also a clutch holds very tight so I’d lose the misalignment tolerance which this has.

Share this comment


Link to comment

AKA the pencil sharpener 😉 All ready for the hand-controller...

49BA78C6-48D9-40D7-A809-E7AB852D62D1.jpeg

8098597C-3233-4354-A475-C6863D023B41.jpeg

Edited by markse68
  • Like 1

Share this comment


Link to comment
Guest
Add a comment...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

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