OnStep for EQ5 (SkyWatcher) Mount

thingiverse

Human: Adapting [EQ5 (SkyWatcher) telescope mount](http://skywatcher.com/product/eq5-mount-with-steel-tripod/) or similar types to [OnStep goto controller](https://groups.io/g/onstep/wiki/home), by Howard Dutton project. ### Accessories recommended * OnStep Mini 2.0 Cotroller and Box on base MiniPCB2 and Teensy3.2 or * OnStep STM32 Controller and Box on base STM32 Blue Pill * OnStep SHC Smart Hand Controller ### BOM 2x JK42HM40-1684 NEMA17 0.9 Degree Stepper Motor 1.68A 2x GT2 Timing Belt 6mm wide 2mm pitch 136mm-2GT 68 teeth 2x GT2 Timing Pulley with 16 Teeth and Bore 5mm for 6mm belt 2x GT2 Timing Pulley with 40 Teeth and Bore 6mm for 6mm belt (Optional) 1x M8x15mm Inbus screw 1x M8x40mm Inbus screw 2x M8 nuts 9x M3x10mm Inbus screw 1x M3 Assortment 2x M4 worm 2x M3 nuts 2x M4x20mm Hex Head screws 2x M4 wing nuts 2x M4 Assortment 18x 2x6mm self-tapping screws 2x RA and DEC PCB 2x RJ14 6P6C Right Angle PCB Jacks 2x JST B4B-XH-A socket 1x 3mm Red LED and (1kΩ rezistor in STM32 case) 1x 3.5mm Stereo jack and cable ### Optional * LUX Photo Case AKV-115 * ZWO ASI AIR ### OnStep 2.22 Config for TMC2130 drivers (Vref=1.6V) <pre> // Axis1 is for RA/Az // calculated as : stepper_steps * micro_steps * gear_reduction1 * gear_reduction2/360. // EQ5 : 25600.0*64*144/360 = 655360 #define StepsPerDegreeAxis1 65536L // PEC, number of steps for a complete worm rotation (in RA), // (StepsPerDegreeAxis1*360)/gear_reduction2. // EQ5 : 25600.0 * 360/144 = 640000 #define StepsPerWormRotationAxis1 640000L // MaxRate (steps/s) // EQ5:24 #define MaxRate 24 </pre> ### OnStep 3.16 Config for TMC2130 drivers is [here](https://www.thingiverse.com/download:7708891) (Vref=2.4V) #### NOTE * Polar Scope Iluminátor LED serial connected with 1kΩ rezistor. In STM32 board plug to MULTI socket 3V3 pin and reticle pin. #### UPDATE * 2020-02-23 Add Config.h for OnStep 3.16 and Pulley_GT2-40v2.stl * 2020-10-09 New red edition add RA/DE belt gear box cover and more improved * 2020-12-12 Add GX16-4 ports version, PCB is on [EasyEDA](https://easyeda.com/editor#id=9c1c785a29264cfcb88c3e3b7e99b0ec) #### Another recommended link: * [3D printed - Small Travel EQ telescope mount](https://www.thingiverse.com/thing:3327081) * [OnStep for GS-280 (old GSO) EQ mount](https://www.thingiverse.com/thing:4386847) * [OnStep for SEBEN EQ3 mount](https://www.thingiverse.com/thing:2476084) * [My all desing for Astronomy telescope ](https://www.thingiverse.com/RomanHujer/collections/astronomy-telescope)