Vixen GP-D2 upgrade kit
Markus Noga has designed this excellent kit for TeenAstro with a Vixen GP-D2 Mount.
The kit contains all files and parts that are required for modifying a Vixen GP-D2.
Supported Motor :
Nema17-400 steppers are coupled with the worm shafts via a belt drive
The kit support these motors: Nema 17 Bipolar 0.9deg 36Ncm (51oz.in) 0.9A 5.4V 42x42x40mm
These motors have been tested and works very well with TeenAstro.
Markus has made a 3D-printable housing for this 2 motors that doesn't need any mechanical modification on the Vixen GP-D2:
The 3D print design for stepper case can be found here (*.stl), if you want to modify the stepper case the tinkercad project file is here
- 2x GT2 pulley with 16 teeth and 5mm bore for the stepper axis
- 2x GT2 pulley with 48 teeth and 6mm bore for the worm axis
- 2x GT2 belt 140mm
- 8x Screw M3x8 to fix the stepper in the case
- 1x Screw M6x35 to fix the RA stepper case to the mount
- 1x Screw M6x16 to fix the DEC stepper case to the mount
- 2x DSUB9 male up to 3 Amps
- 2x SUB-D Mounting kit
Soldering the Stepper Wire to the SUB-D connector
- Solder the wires for one motor coil to pins 1 and 2, and for the other coil to pins 4 and 5.
- It doesn’t matter which coil you put first, switching the coils will just invert the direction of the motor.
- Switching two wires for the same coil also just inverts the direction.
- You can correct for this in the „direction of rotation“ software setting.
- If your motor came without a data sheet, take out your trusty multimeter and measure the resistance for a pair of wires.
- If they have low resistance of a few ohms, congratulations, you have found a pair connected to the same coil.
- If they read megaohms of resistance, you have wires connected to different coils.
- Hold on to one wire, and try the others until you have found your pair.
****Thanks to Markus for this great Contribution****