AZEL_Satellite Antenna Rotator - Tracker

*Updated 9/23/2022

A lot of people have asked for code. Below is some basic code to get you started:
https://github.com/jbyrns2000/ELAZ-Satellite-Tracker

Download the sketch and update as needed. Based on a Yaesu GS232 rotator. Connect via a serial port.

*Updated 2/27/2021

This is a small Antenna Rotator for the Ham Radio Arrow Antenna that is commonly used for Satellite communication.

Mostly 3D Printed. Very cheep and easy to make.
The original was made in ABS. I have now printed all the parts in PETG and it appears to work well.

Please see the video on Youtube: https://youtu.be/u9zFE48awh8

My version uses bluetooth to communicate to my computer and is compatible with the Yaesu GS-232A protocol (sort of). I will post more about the electronics at a later date. I just wanted to get the 3d models up.

The Trackarmknob is designed so you can rotate the antenna 90 degrees for polarization.
The arrow antenna has a 1/4-20 thread in the handle under the grip. Mine did anyway. Just be careful.. don't thread in too far and break the duplexer (if you have one).

Print all parts
Print 2 of the bearings. (I did not create the bearings.)
Print 2 of the clips
Print 2 of the collars
Print 2 of the bearing housing.
The counterweight is optional. Use whatever you like. I used airsoft bbs for counter weight.

Hardware:
2X Nema17 stepper motors.
1X M8x63mm hex head bolt.
1X M8 nut
1X M8 Nylock Nut
2X washers for M8
2X 608 Skate bearings.
18X .375 steel ball bearings.
1X M3x12mm screw
7X M3x6mm screws
2X M3 Nuts

Counter Weight:
1X 3/8-16x12" threaded rod.
4X 3/8 Nuts
2X Washers

Electronics:
I purchased the items below and am currently working on an off the shelf version. I will post more when complete.
1X Arduino Uno R3
1X CNC shield for Uno
2X A4988 Stepper sticks
1X HC-05 bluetooth module.
2 resistors per HC-05 instructions.

Optional Additional items:
-file to round corners if gears don't mess great
-sand paper to smooth out thrust bearing

Screw driver
wrench or pliers to tighten bolt.

Electronics for my personally created one:
I used an adafruit trinket pro for the electronics.
I used 2 A4988 stepper sticks to drive the Nema 17 stepper motors.
If you want bluetooth, then get yourself an HC-05 bluetooth module.
I built my own board. However, other ideas would include an Arduino Mega and a ramps board. I have also seen an Arduino Uno and a CNC hat for the stepper sticks. This could be a very low cost easy solution for the electronic portion.

Older videos during the development:
https://youtu.be/S-LF6aIzVtU
https://youtu.be/G9kMHPowKk0