Motors for a featherwight battlebot

[maddox]

First question is budget

1)If you can pay for Astroflights and the batteries needed, then thats a no-brainer.

2) depends on size and weight of the disk/spinner. But I would aim for 6000 rpm on an 8 2 kg disk.

3)Voltage, always as high as possible , according to the motor.

4)use the same as for the disk, then you can use 1 batterypack. if this is too high for the motors for drive, you can adjust this with the speedo- just dont crank it to 100% duty.

Speedo. The Sidewinder or IBC. If you really are richt, the smaller vantec.

ok,

about the budget...

are there other motors like the astroflight 940 that are so powerfull and small?

because 3 astroflight motors is expanzive.

mabye i can juse only for my disk a astroflight motor and to power my weels a 2 cheaper motors...

witch motor would you suggest for my weels then?

let me know...

yoeri

[john_frizell]

For ten pounds you can get an electric drill complete with battery pack and recharger. Two of these can form the basis for a robot, especially a first one.

I wouldnt advise powering the astroflight of the drill batteries though, Ewan sells drill motors and gearbox already stripped down pretty cheap, combine those with the astro for the disc and some batteries from http://www.overlander.co.ukwww.overlander.co.uk and your on the right track.

Can i be rude and ask what your budget is? An astroflight is a nice motor, but there are cheaper alternatives, not as light but pretty powerfull, fan motors on 24v pack a punch.

Give Geoff an e-mail, he seems to know his stuff on the subject.

[john_frizell]

The battery you have pictured is a lead acid, the least efficient in power to weight but very forgiving. The one at overlander is a lithium ion, most efficient but VERY unforgiving. Why not start with the batteries and chargers that come with the drills and get your robot going and then think about your weapon?

John, overlander do pretty much all types of SLA alternative, and have more on an enthesis on lithium polymer than lithium ion at the moment, which is a more forgiving battery certainly.

[jamesb]

stay away from lithium, my advice.

someone needsto try it soon enough! if i had the money to buy them just to test i deffinatly would. Aslong as they can discharge enough all should be fine if they are looked after well!