Modular Gear Reducers
Description
I needed to reduce the speed of a motor by a large degree. My first tries used a a worm gear, but I didn't have my support settings dialed in well enough to print one yet. I went with this design so it would be easy to add or remove stages depending on the desired gear ratio.
For my current project, I am using 6 stages of gear reduction. 3^6=729 so I have a 729:1 reduction in speed. Included with this is a 1:729 increase in torque.
Instructions
The two pieces screw together using an M3 socket head screw. I used leftover M3x16's from building my ToM, however there is room for larger and smaller lengths. Any extra length of bolt will simply fall into the cutout in front of the gear two stages behind itself, and this actually helps to line them up better as well.
Screw the gear mounts down to a scrap piece of wood, as shown in the pictures. Holes are provided for 2 screws, however I used just the inner hole because it gave more play for the gears (preventing them from jamming) and also more precision in placement because the second screw always seems to move it out of place. Both might be a good idea for just the first one.
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Excellent! :)
We can now each have "Machine With Concrete" as an existential reminder:
http://www.youtube.com/watch?v...
More Arthur Ganson:
http://www.arthurganson.com/pa...
Instead of a concrete block it can be attached to the 3D printer itself!
That looks really cool. How much noise does it make?
The gears look perfect. Did they come off the ToM like that, or did you have to sand them, or otherwise clean them up?
Thanks!
It makes a decent amount of noise when the motor is running at high speeds, however I've reduced the motor speed to about 1Hz already for the project I'm using it for and at that speeds there's almost no noise. Part of the problem though is that the earlier versions of the gear stages had a lot of
play, and they're the ones that are closest to the motor and moving the fastest. I improved the design after each of the first 3 stages (the given files are the final versions) but didn't bother printing new ones because noise wasn't an issue for me at such low speeds. The new ones shouldn't make a
s much noise, but I haven't tested it. I'll try to upload a video in the next few days if you're interested:).
They came that way pretty much right off of the ToM with stock settings, I had to scrape a few leftover strands of raft off of the back to help reduce friction between the gear and the mou
nt, but thats the only post processing that was needed. The hole for the bolt was a little small in early versions so i just had to push the bolt back and forth through it a few times to increase the size, but it wasn't an issue with the most recent versions.
License
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Hello
I have a problem gear transmission for a development of a machine I would like to have your email.
etienneberthaud@gmail.com
thank you
E. B