team combat penguin build diarys

[PJ-27]

Way-ooooooooooooo!

But thanks for the kind words. It's somewhat humbling that Bitza has become synonymous with cheap and successful building.

[harry hills]

bitza is awesome, fact.
what gear ratio is recomended for a hw, i want reasonable speed and power, i will be running 24v wheelchair motors on 36v with a 30cm wheel
thanks

[mattsdragons]

What rpm are your motors?

[harry hills]

on the case of the motors it says 115rpm

[mattsdragons]

Probably want to keep it as it is or do an increase

[blazerbotics]

on the case of the motors it says 115rpm

that will be with the gearbox, which i guess you dont have, in which case the motors probably are doing 3000-4000rpm.

[harry hills]

that sounds more like it.
the motors have the making of what looks like a worm gear setup on them, would it be easy to get a set like this going?
looking to have a solid, reliable drive for this bot, i have acess to a lathe but im guessing that isn't much use unless i need to make some shafts, does anybody have the capabilitys(or know of someone who does) to make the acual casing for the gears to sit in and to hold it together?
thanks

[blazerbotics]

your best to turn the teeth off the motor so you have a plain shaft, and then use chain. Will cost alot to have gearboxs made.

[harry hills]

that sounds a good idea, thanks.

[RogueTwoRobots]

You might be able to throw some gearboxes together using Nylon (I wouldn't use anything softer, like HDPE) if you have access to a semi-decent pillar drill. A few years back I sent a couple of pieces of Nylon to Matt Davey (Tuff Luck) and when I turned up at an event two weeks later, he had got them drilled out to use as Speed 900 gearboxes, and they looked pretty nice.

They were just one-stage and one peice per gearbox. Making a more traditional gearbox with two sides, and getting everything lined up etc could be more challenging, but it could be a possible low-cost solution.