This is camera mount for long exposure night photography. Clock driving gear from IKEA kitchen timer rotates head of this mount with fixed speed: one turn per 24 hours.
This mount allows to make shots with wide-angle lenses and exposure time up to 50 minutes. I'm not sure about telephoto becouse there is gearing wheel in last reduction chain.
My timer is fast for 8 seconds per hour - I think it's so precise result for something like kitchen tool :-) It is possible to adjust speed by changing mass of pendulum:
- decrease mass by file to make clock faster;
- increase mass by smallest drop of clue or paint (you can use permanent marker) to slow it down.
Also I've completely removed bell mechanism. It vibrates in the end of gear motion. Another way to disable it - just fix the hammer in high position. I did it by drop of superglue at the first time.
Bill of materials
Excluding printable parts you need:
- 1x screw DIN931 M12 L80mm;
- 1x hex nut DIN934 M12 (or wing nut);
- 2x thrust bearings 7201B or analog (use only thrust bearings!);
- x1 Screw DIN931(933) M8 50mm (for photohead);
- M8 Wing nut (for photohead);
- Assortment of crews DIN 7049(or 7981) 2.9mm for parts coupling.
And sticks or tubes with 8mm diameter:
- 1x of 164mm lenght;
- 2x of 130mm length.
- This device has few compatible parts with this tracker.
- Big tense in axis bearings may cause spasmodic motions of camera. You should tighten the nut not very strong, but enough tough to avoid luft.