ZWO EAF Holder for Celestron Edge HD 9.25 " (8" , 11")

ZWO EAF Holder for Celestron Edge HD 9.25 or other simillar Celestron SC telescope.

Quick unlock for manual focusing.

BOM

• 1x GT2 Timing pulley 20Teeth/Bore 5mm
• 1x GT2-142mm Timing Belt size 6mm
• 3x M4 worm
• 3x M3 x 15mm Inbus screw
• 2x M4 x 35mm Hex Head Screws
• 2x M4 Assortmen

Add for Version 2

• 2x M3 x15mm Inbus screw
• 2x M3 x20mm
• 2x M3 nuts

Add for Version 3

• 1x M4x 20xmm Hex Head Screws
• 1x M4 nuts
• 1x M4 Assortmen

Optional for OnStep focuser

1x Nema17 Stepper motor 17HS15-1704S

1x GT2 Timing pulley 16Teeth/Bore 5mm

4x M3x10mm imbus screew

4x Self Tapping Screw 2x6

1x RJ45 - PCB on EasyEDA

NOTE

Use a M4 tap to create a thread for worm in pulley and M3 tap to create a thread.

FreeCAD source on my github

UPDATE

2019-12-08 Version 2 add belt tensioner

2019-12-11 Version 3 improved belt tension

2020-09-03 Version 4 next imporved and fix for Optec Lepus reductor

2020-11-28 Add holder for NEMA17 OnStep focuser

2021-01-01 Add beld tensioner for V4b

Other remix

• Some improvements by by James Dedij