OnStep for GS-280 (old GSO) EQ telescope mount
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Adapting GS-280 (old GSO) EQ telescope mount to OnStep goto controller , by Howard Dutton project. Accessories…
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- GNU General Public License v2.0
Adapting GS-280 (old GSO) EQ telescope mount to OnStep goto controller , by Howard Dutton project.
Accessories recommended
- OnStep Controller and Box on base STM32 Blue Pill
- OnStep SHC Smart Hand Controller
- Alternative OnStep Mini 2.0 Cotroller and Box on base MiniPCB2 and Teensy3.2
BOM
2x JKM NEMA17 42BYGHW609 1.8 Degree Stepper Motor 40mm 1.7A
2x GT2 Timing Belt 6mm wide 2mm pitch 170mm-2GT 85teeth
2x GT2 Timing Pulley with 16 Teeth and Bore 5mm for 6mm belt
2x GT2 Timing Pulley with 60 Teeth and Bore 8mm for 6mm belt (
16x M3x10mm Inbus screw
2x M4x20mm Hex Head screws
2x M4 wing nuts
2x M4 Assortmen
18x 2x6mm self-tapping screws
2x RJ14 6P6C Right Angle PCB Jacks
2x JST B4B-XH-A socket
1x 3mm Red LED
OnStep 4.x Config for TMC2130 drivers (Vref=2.5V)
//AXIS1 RA/AZM #define AXIS1_STEPS_PER_DEGREE 19200.00000 // 144t x 60/16 x 200 x 64/360, #define AXIS1_STEPS_PER_WORMROT 48000 #define AXIS1_DRIVER_MODEL TMC2130_QUIET #define AXIS1_DRIVER_MICROSTEPS 64 #define AXIS1_DRIVER_MICROSTEPS_GOTO OFF #define AXIS1_DRIVER_IHOLD 300 // (mA.) #define AXIS1_DRIVER_IRUN 1400 // (mA.) #define AXIS1_DRIVER_IGOTO 1680 // (mA.) #define AXIS1_DRIVER_REVERSE OFF #define AXIS1_DRIVER_STATUS TMC_SPI //AXIS2 DEC/ALT #define AXIS2_STEPS_PER_DEGREE 16000.00000 // 120t x 60/16 x 200 x 64/360 #define AXIS2_DRIVER_MODEL TMC2130_QUIET #define AXIS2_DRIVER_MICROSTEPS 64 #define AXIS2_DRIVER_MICROSTEPS_GOTO OFF #define AXIS2_DRIVER_IHOLD 300 // (mA.) #define AXIS2_DRIVER_IRUN 1400 // (mA.) #define AXIS2_DRIVER_IGOTO 1680 // (mA.) #define AXIS2_DRIVER_POWER_DOWN OFF #define AXIS2_DRIVER_REVERSE OFF #define AXIS2_DRIVER_STATUS TMC_SPI #define AXIS2_TANGENT_ARM OFF
NOTE
- Use the M3 thread mask for drill 2.5mm holes to cut the M3 thread in the original auger holders.
- FreeCAD sources on Github
Another recommended link:
- 3D printed - Small Travel EQ telescope mount
- OnStep for SEBEN EQ3 mount
- OnStep for EQ5 (SkyWatcher) mount
- My all desing for Astronomy telescope
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