3D printed - EQ telescope mount with OnStep goto controller

thingiverse

<b>NOTICE:</b> The new version is now released! https://www.thingiverse.com/thing:3327081 EQ mount for small telescope or DSLR with OnStep goto controller. Here's how it works: see my video at https://youtu.be/2uIM-Aml7Mk. FreeCAD sources are available on Github: https://github.com/romanhujer/Small-EQ-mount-OnStep. The EQ mount uses 2x My Planetary gearbox 1024:1. Learn more about OnStep goto controller at Howard Dutton's project: http://www.stellarjourney.com/index.php?r=site/equipment_onstep. ####OnStep config.h For NEMA17 40mm 200 steppers motors: <pre> // 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 </pre> For NEMA17 40mm 400 steppers motors: <pre> // 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 </pre> ####Another recommended link: * My OnStep for Seben EQ3 mount: https://www.thingiverse.com/thing:2476084 * My OnStep ST4 Handheld controller: https://www.thingiverse.com/thing:2626117 * My DIY Telescope: https://www.thingiverse.com/thing:2610531 ####NOTE: Use stones and cement to fill the weights.