3D printed - EQ telescope mount with OnStep goto controller by RomanHujer

Last crawled date: 3 years ago

NOTICE: The new version now released!
EQ mount for small telescope or DSLR with OnStep goto controller.
How to this working? See my video: https://youtu.be/2uIM-Aml7Mk
FreeCAD sources on Github
EQ mount used 2x My Planetary geerbox 1024:1
More info about OnStep goto controller on Howard Dutton project
OnStep config.h
For NEMA17 40mm 200 steppers motors:

// Axis1 is for RA/Az
#define StepsPerDegreeAxis1 9102.22222 // calculated as : stepper_steps * micro_steps * gear_reduction1 * (gear_reduction2/360)
// NEMA17 + PLANET : 200 * 16 * 1 * 1024/360 = 9102.22222

// Axis2 is for Dec/Alt
#define StepsPerDegreeAxis2 9102.22222 // calculated as : stepper_steps * micro_steps * gear_reduction1 * (gear_reduction2/360)
// NEMA17 + PLANET : 200 * 16 * 1 * 1024/360 = 9102.22222

// PEC, number of steps for a complete worm rotation (in RA), (StepsPerDegreeAxis1*360)/gear_reduction2. Ignored on Alt/Azm mounts.
#define StepsPerWormRotationAxis1 3200L
// NEMA17 + PLANET : (9102.22222*360)1024 = 3200

For NEMA17 40mm 400 steppers motors:

// Axis1 is for RA/Az
#define StepsPerDegreeAxis1 18204.44444 // calculated as : stepper_steps * micro_steps * gear_reduction1 * (gear_reduction2/360)
// NEMA17 + PLANET : 400 * 16 * 1 * 1024/360 = 18204.44444

// Axis2 is for Dec/Alt
#define StepsPerDegreeAxis2 18204.44444 // calculated as : stepper_steps * micro_steps * gear_reduction1 * (gear_reduction2/360)
// NEMA17 + PLANET : 400 * 16 * 1 * 1024/360 = 18204.44444

// PEC, number of steps for a complete worm rotation (in RA), (StepsPerDegreeAxis1*360)/gear_reduction2. Ignored on Alt/Azm mounts.
#define StepsPerWormRotationAxis1 6400L
// NEMA17 + PLANET : (18204,44444*360)/1024 = 6400

Another recommended link:
My OnStep for Seben EQ3 mount
My OnStep ST4 Handheld controller
My DIY Telescope
NOTE:
Use stones and cement to fill the weights.