Graupner motors

[PJ-27]

Cool, let me know. I'll take them off you is Archie doesn't want.

[team_mayhem]

Here are a few cheap speed controller options not tried personally but look okay,

http://www.ebay.co.uk/itm/High-Voltag-E ... 864wt_1061

http://www.ebay.co.uk/itm/RC-Boat-Water ... _830wt_956

http://www.ebay.co.uk/itm/RC-Model-Wate ... 3238wt_956

http://www.ebay.co.uk/itm/EL-Model-110A ... 3f1639acdd

[PJ-27]

Cheers:

Here are a couple of Hong Kong/UK, high amperage, 12v, bi-directional, cheap ESCs I've found.

http://www.ebay.co.uk/itm/230717707687? ... 1438.l2649

http://www.ebay.co.uk/itm/270955818205? ... 1438.l2649

The one with the Blue find appears to have low voltage cut off too.

[archie2000]

Woah cheers.for the links guys
no.wonder bitza was so cheap with your eBay skill PJ
how about claws powered by big servos
a sort of battle axe design
i would like a sort of bonded/welded frame made from ultra high molecular stuff (UHMWPE) as that is easy ti weld
for my axe i am thinking overvolted 300watt motor
the frame will.support the impact of the axe
i found a nice 1.1kg one in b&q 39cm long so a nice size for £12
as for Johnny's axe link could i use a gear and a sheet of metal sandwitch with
bearings in the sides of the frame with a big axle running through?
also has anyone ever done the motor mod as in the axe tutorial?
seems quite.pointless when it will.work without taking your motor to bits
will try some designs now
cheers everyone

[harry hills]

big servos? not a good idea
you can't realy weld it, its a plastic, you can melt it together but screwing it is a better idea

[jonny]

Linear actuator if you're gonna try and add claws, I wouldn't recommend it though. Just concentrate on making a working axebot. Welding plastic can be done but YOU shouldn't attempt it. Just stick to wood screws.

[Laser]

right, a few questions before you build.

Have you access to a welder that can weld steel and ti?
Where are you going to get your metal from?
Have you got a decent circular sawsaw that you are going to cut the plastic with?

you need to consider all these factors before you build your robot

Draw a few sketches and then go in to CAD (carboard aided design) then see if everything works then build

we took a good year of research and sketches before I built Laser I.
Then go to an event and talk, we learnt more there than a year of on the web!

As for the blue esc's, they're rubbish. They are uselles and a waste of money. save up and get something decent like 2x 15a electronizes or a scorpian xl, theyre far far better

[PJ-27]

no.wonder bitza was so cheap with your eBay skill PJ

Haha, that and car boot sales and scrap yards!

[Anttazz]

right, a few questions before you build.

Have you access to a welder that can weld steel and ti?

I think by ti he mean to.

Also, Blue ESC's served me pretty well both as drive and weapon speed control for the price of them. I even ran the 12v ones on 14.4v in a beetle and featherweight and they worked fine. I think one of the Scottish guys will be running them in Edinburgh, if he ever gets round to taking his robot chassis out of my workshop...

[archie2000]

yeah i will have a look for some low volt motors.
if i don't get decent ones PJ can have em