On 06/08/2019 12:06, Gareth's was W7 now W10 Downstairs Computer wrote:
On 06/08/2019 11:44, Another Dave wrote:
On 05/08/2019 21:29, Gareth's was W7 now W10 Downstairs Computer wrote:
What's the favoured approach to getting hold of gears,
to cut them yourself, or to buy from, say, HPC gears?

I used my 3d printer to produce the gears and pulleys for motorising
my astronomical telescope.

Your application may be somewhat more strenuous.

Another Dave


What module or DP for those gears, because AIUI there is
a limit to how small something can be extruded from
a 3D printer?



I'm just using the standard 0.4mm nozzle because it's OK for my
application. 0.2mm is the smallest practical size.

I'm using pulleys with GT2 toothed belts mainly, but a worm and gear
arrangement for the focusser.

The patterns for the printer are generated by Autoscad

https://www.openscad.org

using (for gears)

https://www.thingiverse.com/thing:1604369

and (for pulleys)

https://www.thingiverse.com/thing:11256

Both are quite difficult to use (the gears thing is in German!) but very
rewarding.

Another Dave
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