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Come Here And Say That Again - build dairy
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Come Here And Say That was my first featherweight that actually got into an arena - it was built in an afternoon as a bit of a joke for the Inter Hackspace Robot Wars but went on to win it. Its since been to a few live events and survived getting thrown around by the floor flipper but never really did much to worry anyone competitively. It had two ride on scooter motors and gearboxes, a Sabertooth 2x25 ESC (which didn't die!), old school 3Ah Technobots nicads and salvaged 10mm polycarbonate. Eventually one of the motors died so now I'm building a slightly more serious replacement. Come Here and Say That Again will probably only be a little more competitive, as I'm trying to spend as little as possible again by repurposing some spares from Deadlock. As they're from a heavyweight they're a bit out of place in a feather, but it should be fun if it works.
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The new design is similar: a big wheeled wedge with a polycarb chassis but this time with a shock mounted hardox wedge, lifter hidden underneath, massive motors and go kart wheels. Hopefully this will also be a quick build since its relatively simple and I have almost everything on hand.
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These are the motors and batteries from Deadlock and the wheels from my ride on power tool drag racer - I'll be using two of each. Just the motors, batteries and wheels come to ~8kg, so weight is going to be tight.
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Some of the bits bought just for CHASTA
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I've just started the machining, these sprockets may ultimately end up in Deadlock, but for now they're being stolen as they also happen to give the right gear ratio for an overpowered feather.
This weekend I'm hoping to make the majority of the plastic parts.
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first plastic parts machined
I had a reasonably productive today today, making 8 of the chassis parts whilst snapping two cutting bits. More time was spent being frustrated with my poor Fusion360 CAM skills than actually making parts, so hopefully tomorrow will go better as I figure out the process.
One bit of weirdness I couldn't figure out that caused one of the snapped bits was the feed rate randomly increasing mid cut. They were regular 2d contour toolpaths and occasionally the feedrate would increase ~10x just for a few millimeters, then drop back to normal. The code looks fine in the mach3 toolpath viewer, but the I don't know really what I'm looking for.
I also need to get better at photographing transparent parts:
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