DOB Accessories

UP   HOME

 

Power Focuser

 

MotoFocus Controller   Rechargable Battery Conversion

I modified the MotoFocus controller with a rechargeable 9v battery.  The battery is actually a small Li-Po with a built in charging circuit.  USB C cord is used to charge.  The telescope has a 5v buck convertor installed for small accessory charging.

 

 

Bracket Drawing   Focuser Motor Bracket

I decided to motorize the focuser.  I bought a used MotoFocus device from some sort of a MAK/CAS scope and 3D printed the needed adapters.  I used Fusion 360 to create the motor bracket.  I will admit it took a few tried to get the tube to knob centerline distance correct.  A plus is the bracket does not need to be fastened down to the tube and is instantly removable if needed.

 

Hub Adapter   Installed Hub Adapter

A small adapter was 3D printed to adapt the motor's drive cup to the focuser knob.  It is just a press fit and is easily removed by hand.

 

 

Motor with installed bracket   Installed Motor

 

 

Battery Charger

 

Small Smart Charger   Battery Setup

I  picked up a small smart charger for the Gel Cell battery that powers the scope.  Once the charger was tested, I cut off the end of the cord and installed an Anderson Powerpole. It plugs into the secondary Powerpole socket