OpenAstroExplorer BOM

	A	B	D	F	H	I	K
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3			Part	Amount	Comment		Link
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5		Aluminum Extrusions	2020 - 300mm	1	used as Counterweight bar
6	Ideally with 6mm slots and 6mm center holes		2020 - 200mm	1
7			2020 - 50mm	1
8		Shop	4040 - 75mm	1
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10		Bearings	6012	2
11			625 ZZ	7			https://s.click.aliexpress.com/e/_oEHpPPg
12		Shop	F695 ZZ	4			https://s.click.aliexpress.com/e/_omi2r1M
13			6907	2
14			F6006	1			https://www.aliexpress.com/item/1005004818002083.html
15			51111	1
16			LM5UU linear bearing	1			https://s.click.aliexpress.com/e/_om4Duce
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18		Motion	GT2 16T Pulley	4	all pulleys for 6mm belt, 5mm shaft, not the 14mm option		https://s.click.aliexpress.com/e/_oEnRn2W
19			GT2 48T Pulley	2			https://s.click.aliexpress.com/e/_olpRHRC
20		Shop	GT2 Belt loop 142mm - 71T	2	all belts 6mm width		https://s.click.aliexpress.com/e/_oFku0cO
21			GT2 Belt loop 192mm - 96T	1			https://www.aliexpress.com/item/4000034021834.html?
22			GT2 Belt 6mm open	~75cm			https://s.click.aliexpress.com/e/_oCGhT1G
23			0.5M 50T worm gear set bore 5mm	1	1 worm, 1 gear, for 5mm shafts		https://www.aliexpress.com/item/4000485993030.html
24			MGN9C 100mm linear rail	1			https://www.aliexpress.com/item/32806622073.html
25			Shaft coupler 5 to 5mm	1	use D14 L22 only, see link		https://s.click.aliexpress.com/e/_oCqnvk2
26			Shaft coupler 5 to 8mm	1			https://s.click.aliexpress.com/e/_oCqnvk2
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28		Clamps & Plates	Arcaswiss clamp + plate set	1	use only the ones like from link		https://s.click.aliexpress.com/e/_ooSVitd
29		Shop	Arcaswiss clamp 90N without plate	1	use only the ones like from link		https://s.click.aliexpress.com/e/_oDexOX1
30			Arcaswiss plate	1	used to attach camera/telescope. You can use a 120mm or get a 200mm to attach both DSLR and Guider next to each other		https://s.click.aliexpress.com/e/_oFB3M43
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32		Electronics	OAE board	1	custom, only available from OAT Shop		OpenAstroExplorer - Electronics — OpenAstroTech
33			ESP32 30 pin board	1			https://s.click.aliexpress.com/e/_ok6S1Yf
34		Shop	TMC2209 driver (BTT preferably)	2			https://s.click.aliexpress.com/e/_oF93vGa
35			A4988 driver	2			https://s.click.aliexpress.com/e/_oo8kGfc
36			28BYJ-48 5V stepper	2			https://s.click.aliexpress.com/e/_omUsuRG
37			5.5 x 2.1mm female DC Barrel - see link	1			https://s.click.aliexpress.com/e/_oEoybL9
38			Terminal Connector Cable 2.8mm	2			https://s.click.aliexpress.com/e/_oE3njf9
39			NEMA 17 for RA - see comment	1	recommended to use 0.9° NEMA17 with 48mm body length (can be shorter but not longer). Available from OMC-Stepperonline as 46 Ncm variant
40			NEMA 17 for DEC - see comment	1	recommended to use 1.8° NEMA17 with DUAL SHAFT! Needed to correctly set preload on DEC worm gear		Dual Shaft Nema 17 Bipolar 45Ncm(63.74oz.in) 2A 42x42x40mm 4 Wires - 17HS16-2004D \| StepperOnline
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42		Screws and small Parts	See next GSheet Page
43		Shop
44		Other	JST Crimp tool, contacts and 2x JST-4P and 1x JST-5P connector **
45			Power Supply 12V, with appropriate barrel size for DC connector, recommended at least 2A
46			Tripod - Compatible with EQ5 Tripods or directly to Arcaswiss Tripod. Needs to be very sturdy, dont try with cheap photo Tripods
47			Counterweights - Sport lifting weights with at least a 28mm bore			You will need roughly 1:1 counterweights to gear weight
48			Small amount of general purpose grease for worm gear
49
50		For assembly	6mm metal drill. A M5/M6 (depending on extrusion center hole) tap is also useful
51			Soldering Iron for heated inserts **
52			Hex Keys M2 to M6
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55			** not needed if part is purchased from OpenAstroTech store
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