motors

[lewisantweight]

Re: motors

the robot sounds good and i may buy the gimsons but i thought i might need 18 - 24v motors to give it enough strength.

[harry hills]

Re: motors

overvolting. overvolting. overvolting

running 12v drills on 18v gives you plenty power and speed for a simple bot.

[lewisantweight]

Re: motors

oh ok i thought you had to match the voltage with the max of the esc and battery etc.

[archie2000]

Re: motors

don't over volt an esc though

[lewisantweight]

Re: motors

http://www.ebay.co.uk/sch/i.html?_kw=ge ... erTools_SM any of these do? this is my first project and i want to get it right.

[harry hills]

Re: motors

not really.

gimsons, drills or speed 900's if you have moneyz

[lewisantweight]

Re: motors

i have a drill motor but they are ridiculously small and they look too weak and stupid on my featherweight thwack bot. this is the one i got.
http://www.ebay.co.uk/itm/12V-Small-PCB ... 27c4ad1d3d

[harry hills]

Re: motors

not those type of drills,
the cordless drills, ones with a gearbox.

[RogueTwoRobots]

Re: motors

Like so: http://www.argos.co.uk/static/Product/p ... +DRILL.htm

You can overvolt them to 18V, or use larger wheels to get more speed. Finding the balance between voltage and wheel size will be key to the performance of a thwackbot, as the larger the wheel, the less torque (turning force) the motor has.

I wouldn't say there is too much difference between the GR01s and cordless drills when it comes to power for a thwackbot. If you really want a fast and meaty drive, Speed 900s (or their cheap eBay replicas) are the sort of motors you want to be considering. The issue with them is that you have to sort out and pay for parts for a gearing system (sprockets & chain, timing belts & pulleys, gears etc)

[lewisantweight]

Re: motors

i am trying to find two for under 40 quid

[RogueTwoRobots]

Re: motors

Well those drills will be your best bet. Alternatively, these Speed 900 clones are £12 each:

http://www.ebay.co.uk/itm/300511267976? ... 725wt_1037

Which leaves you with £16 for gearing. Not entirely impossible I don't think.

[lewisantweight]

Re: motors

i am getting those where will i get the gears? sorry for all my pointless rookie questions.

[harry hills]

Re: motors

technobots have a good selection

[lewisantweight]

Re: motors

any in particular that would fit because i wouldn't have a clue?

[RogueTwoRobots]

Re: motors

Pulleys and belts: http://www.technobotsonline.com/index.p ... ory_id=197

Click on 'aluminium timing pulleys' for pulleys, 'timing belts' for belts, and then just match the types up (T5x10mm, T10x16mm etc)
Drumroll uses T5x25mm for its weapon. T5x10mm would probably be fine for a drive system.

Sprockets and chain: http://www.technobotsonline.com/index.p ... ory_id=193

Either the 6mm or 8mm sprockets/chains should be beefy enough for a featherweight. As an example, DB5 (4-wheel drive pusher) uses the 6mm stuff.