Application Note #7 - Astrophotography
Objectives
- build an Astrophotography Camera Mount
- this is an introduction to a series of application notes that describe the building of an Astrophotography Camera Mount based on Reference 1…
Description
To counter act the effects of sidereal motion, you need to rotate a camera at 000694 RPM
Since the Earth rotates once every 24 hours, it rotates at .000694 RPM (1÷(24×60))…
Reference 1 uses a 10,000:1 gearbox rotating at ~7 rpm to counteract sidereal motion but I liked this one better….
BUT it was too hard to print :(
So I decided to print the gearbox of the original project…
The gearbox consists of four 5 : 1 and two 4 : 1 sets planetary gear sets to achieve a gear reduction ratio of 10000 : 1.
The stl files can be found here…
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References
Procedures
- the following series of application notes will document the
Step 1
download stl files
print 5:1 gear box - not sure how well the 3d printer will print this gearbox, so lets print 1, 5:1 gear box and program a stepper motor to turn it.