Starting Point

just a point on microswitches. You don't need to have them operate by the axe arm. You can also put a cam on the axe shaft and it will operate the two limit switches as it rotates. Also a fair ide to put a stop in for the axe. The microswitches will stop the current to the axe but the axe will keep moving so unless you put in a deliberate stop bar or similar you'll find it will damage the robot.

Froggy uses a fairly large steel bar and some foam on pure evil which seems to work well enough.

Andy

Good idea with the foam, somehting squijy should stop your microswitches getting damaged but have something in the way to stop the axe jsut after the microswitch clicks.

Thankyou again for the help with the wiring, looking into get some microswitches soon. Have the motor on order, its a 24V 250W scooter motor, is there any way in which i can determine its stall current to see what speed controller I need, or anyone have any good recomendations for a weapon controller. I was thinking maybe the victor range was a good bet

http://www.warbotsxtreme.com/motors.htm

It says there that you multiply the resistance of the motor by the voltage you will use it at.

Not sure if its correct but it might work.

Don't bother with a speed controller for the axe, you'll need a switch or relay as you're looking for an instant acceleration. I used these in hornet and they happily handled a magmotor stalled for a few seconds so you should be fine.

http://www.jaycarelectronics.co.uk/prod ... BCATID=754

You won't find anything similar cheaper. Couple it along with a battleswitch etc and you'll have you're weapon control system that should happily handle your motor when stalled.

Quote:

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Originally Posted by daliad100

http://www.warbotsxtreme.com/motors.htm

It says there that you multiply the resistance of the motor by the voltage you will use it at.

Not sure if its correct but it might work.

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Just realised that I misquoted and the edit has gone. It should be Voltage over Resistance gives current.

Quote:

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Originally Posted by typhoon_driver

Don't bother with a speed controller for the axe, you'll need a switch or relay as you're looking for an instant acceleration. I used these in hornet and they happily handled a magmotor stalled for a few seconds so you should be fine.

http://www.jaycarelectronics.co.uk/prod ... BCATID=754

You won't find anything similar cheaper. Couple it along with a battleswitch etc and you'll have you're weapon control system that should happily handle your motor when stalled.

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Cheers this sounds like a good idea but any chance of a wiring diagram or bit more explanation as im slightly confused. Also am i right in thinking with this setup the axe wouldnt soft return and also that there would be no off position for the axe it would alway be switched on in one direction?

Quote:

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Originally Posted by typhoon_driver

Don't bother with a speed controller for the axe, you'll need a switch or relay as you're looking for an instant acceleration. I used these in hornet and they happily handled a magmotor stalled for a few seconds so you should be fine.

http://www.jaycarelectronics.co.uk/prod ... BCATID=754

You won't find anything similar cheaper. Couple it along with a battleswitch etc and you'll have you're weapon control system that should happily handle your motor when stalled.

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I agree, we've used the same things for our spinners. Be advised that they only close in 1 direction and will pass the current from another direction even when closed. So making an H-bridge out of these is not as simple as normal relays which are either open or closed from both directions.

Is this right?

http://i48.tinypic.com/2yzjtiq.jpg

Im not sure if theres ment to be 1 or 2 batterys but I dont think the battle switch can handle the current the motor will draw? PS sorry for doing this in paint lol

The battle switch can be powered of the reciver afaik, which will ultimately all be powered from the main battery through a regualtor.If you want a second battery for the axe thats fine, but if at all possible id just use 1, makes charging and keeping track of whats charged a laot easier, and its cheaper.