Gears and gearboxes. What do you want for your robot?
March 16, 2012
Sometimes when your building a robot you will need gears. Although there are plenty of ready made gearboxes on the market they will not always fit your needs. I have been looking at puting together a collection of gears, shafts and even small bearings so that you can build you own gearboxs.
I started off with the green bevel gears shown below, they have big, strong, chunky teeth that are hard to break. These allow you to have a 90° output.
I have now found some gears with slightly bigger, stronger teeth (0.6 pitch instead of 0.5). The yellow gear shown in this photo allows you to adapt from 0.5 to 0.6.
What else would you want in a set of gears?
At this stage I am trying to keep this kit relatively cheap so some things like metal gears are out. What I have so far:
- A selection of plastic gears including worm gears and possibly linear rack.
- A range of suitable shafts to suit the gears.
- Aluminium mounting plates with holes spaced to allow various gear ratios to configured.
- Small 90 degree brackets and screws for mounting the gearbox.
- Motors to suit (common types so they are easy to replace).
- A couple of small drill bits for changing the gears from press fit to free spinning.
- Some small bearings to reduce friction.
Although it hasn't been mentioned yet I have recently designed some new, low cost, quadrature encoders that use hall effect sensors and work with both 3.3V and 5V systems. I think a couple of these could come in handy.