Hey all, been wanting to automate my filterwheel at a nicer price than $300. Picked up a Celestron Skyris Filter Wheel for around $80 not too long ago and plan to use a stepper and Arduino Nano to create an ASCOM interface for automation. In preparation for making a housing for the electronics I needed a to-scale model of the filter wheel, so here you are.
Keep in mind there are some missing bits:
- Two springs and two steel balls
- No threads in the 1.25" filter wheel slots
- No threads in the camera / visual back slots
- Thin washer that goes between the front plate and filter wheel
- No body screws and screw slots not threaded
If you plan on automating this filter wheel it should be super simple, since the middle spindle is plastic and proceeds through the entirety of the body, I should be able to print a new spindle that's hard pressed into the filter wheel itself, then extend the spindle to protrude through the back with a gear attached. Then I can model an extension that attaches to the casing itself to house the motor and electronics.
Please keep in mind this is by no means meant to replace the original filter wheel. This is just a to scale model to use for modifications only to help with anyone trying to automate theirs as well!
As per usual, I've included the fully assembled SKP file for sketchup along with all the separated parts and STL's.
I'd also like to include a thanks to pipshag as this is a sort-of redux? I used the electronic base that he used to control this thing. I've made some tweaks to the code to support a 5th filter, still waiting on the Hall sensor so it can auto-calibrate itself...stuff takes a while when it's coming from the other side of the planet.
Once I've fully automated the filter wheel and have tested it I'll release the 3D designed parts here. That way if you have one of these filter wheels you can automate it just as I'm doing now.
Once I've finished the casing, electronics, gears, hardware, etc I'll be posting a completely new thing here for the automated drive system.