Rocker Frame Azimuth Control for Hadley Telescope (Metric)

This is an addon to Rocker Frame Project. 

It allows precise control of azimuth of the telescope. By default the control is manual using the turning wheel. Optionally you can attach stepper motor and some control to drive it automatically. 

This whole design is metric and requires M4 screws/bolts.

There are a few options where and how you attach it:

• To the bottom of the Rocker Frame Base . Turning wheel will be pointing up and will rotate with the rest of frame. In this option you can additionally print Stand.
• Between two Rocker Frame's. You need to additionaly print Rocker Frame Base. This way you can achieve higher frame.

Stand is optional. It's for the lazy ones that prefer to print everything. Anyway you will need to apply some layer of high friction surface to the bottom of Stand (hot glue).

If you don't want to print Stand, you can also attach the Spur Gear (215 teeth) to some plywood or just add some rubber feet (some hot glue).

Spur Gear (17 teeth) has a hole designed to be compatible with NEMA 17 stepmotor shaft and Base has compatible mounting screws. I'm planning to motorize the whole thing.

Turning Wheel assembly with Spur Gear (17 teeth):

• Put Spur Gear into Base
• Put Turning Wheel into Spur Gear from the other side
• Put M4/50 mm bolt through turning wheel and spur gear. 
• Tighten bolt. Preferably use nylock nut.

Printing:

I printed with 20% infill with ABS. Everything prints without supports, but supports in the holes for the nuts wouldn't hurt. The biggest part (Base) requires ≥235mm printing field.

WHEEL AND SPUR GEAR (17 TEETH) HAVE THIN WALLS. CHECK IF YOUR PRINTER WILL PRINT THEM! 

Gear parameters:

• Module: 1mm
• Number of teeth: 17 and 215
• Pressure Angle: 20 deg
• Root Filet Radius: 0.4 mm

BOM:

16x M4/10mm bolt

16x M4 nut

1x M4/50mm bolt

1x M4 Nylock nut