JUWEI-17 strain wave mount electronics replacement board.
History of modifications:


Specs:
Version Load Controller Comms. Motors Transmission Max. Speed Encoder GPS RTC Focuser Power tracking/slewing Status
Original 13/18Kg* OnStep
ESP32		 USB/Wifi/Bluetooth
ASCOM/APP/WebServer		 NEMA17 1.8º 12V 16 microsteps
4 wire steppers		 Belt reduction 4:1 2.6º/sec No No Yes No 12V@0.5A/12V@0.8A
1.9 13/18Kg* OnStepX
TEENSY 4.0		 USB/Wifi
ASCOM/APP/WebServer		 NEMA17 1.8º 24V 64 microsteps
4 wire steppers		 Belt reduction 4:1 8º/sec No Optional No No 12V@0.45A/12V@1.2A EOL/Support only
2.0 13/18Kg* OnStepX
TEENSY 4.0
ESP8266		 USB/Wifi
ASCOM/APP/WebServer		 NEMA17 1.8º 24V 32/128 microsteps
4 wire steppers		 Belt reduction 4:1 10º/sec No Optional No No 12V@0.5A/12V@1.2A Active
2.2 13/18Kg* OnStepX
TEENSY 4.0
ESP8266/ESP32		 USB/Wifi
ASCOM/APP/WebServer
Bluetooth** (with ESP32)		 NEMA17 1.8º 24V 32/128 microsteps
4 wire steppers		 Belt reduction 4:1 10º/sec No Optional No Optional 12V@0.5A/12V@1.2A Active
*Max load using counterweight (5Kg max.)
This mount also has a R.A. axis motor brake.
All values are approximate and subject to change without notice.
**For mount control with a VR controller, not for guiding or full mount control. For guiding / full control, USB is prefered; WiFi is ok but has more latency.

JUWEI-17 by GOAAA, latest version:

90mm refractor on JUWEI-17 @8º/Sec YouTube video #1

254mm reflector on JUWEI-17 @8º/Sec YouTube video #2


Board version 2.2 now supports Bluetooth VR controller for basic mount control;
Ideal for visual observation and fine mount control when adjusting mount for astrophotography.
Any button/joystick movement is useful for emergency go-to abort.
All main chips are now socketed - Easy to replace a failed motor driver.



Custom drop-in replacement board for JUWEI-17, board rev. 2.0:



Testing fit of JUWEI-17 custom board:



JUWEI-17 with custom board and new blue switch to match the color of the mount :)



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