antweight first attempts

23/09/2000 Well the SMA axe is proving to be very difficult. In theory the flexinol requires 400mA, and gives a contraction of about 5%, the problem is fixing the ends, soldering de-natures the wires abilities and clamping is a nightmare.

So we're looking at another servo to power a rear flipper/ax/SREMECH, though the liitle guy runs upside down fine. We've got plenty of weight left, as we're only upto 104g so far.

The wheels are now sporting rubber bands for improved grip too.

Adam and his friend Duncan have been practicing driving the little guy , so hopefully he will be team captain for the Antweight wars in October.

I can smell victory.

History:

A 4.8v NiMh PCB mount battery provides the juice and at present were working on a shape memory alloy powered axe, which weighs almost nothing, but we keep frying the wire, so for simplicity we may just bung another servo in there.

Chassis is now made from an old Rotring pen case, with packing foam armour

First outing should be the world championships at Guilford on October 29th 2000

Comments

The weakness of machines

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robot rebuilds

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Still waiting for the gears.... so no wheels yet

13/2/01- Still waiting for the gears.... so no wheels yet Revised Specifications for Killer Carrot 1 Chassis Mig welded 35x15mm 2mm box ERW steel, forming a 400x400x200 cross-braced perimeter frame. Motors 2 x 24v surplus hi torque (weedy) motors from display electronics. (Don't buy these, save your cash and buy something decent from Roger Plant) Speed Controllers 2 x 4QD NCC35-24 through a DCI, pots linked to 2 Futaba S3003 servos. Radio gear Futaba Skysport T6YFK, 6 Channel Tx, 40MHz fm, FP-R138DF 8 channel dual conversion receiver, with 1 RF-1 failsafe. Weight Middleweight, under 50kg Drive train Motorcycle sprockets and chains 8.2:1 reduction on new 10" pneumatic tyres, giving around 8.5mph top speed Batteries 2 Micro kiel 18AH 12v's Weapons 40mm pneumatic ram giving around 60kg's of lift via a pivoted arm, rear mounted spikes for ramming. Armour 3mm BASF RESART polycarbonate Special features Can run upside down. So here we h...

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