We used a banebots 16:1 for our defense clearing arm for 2016, looked so familiar. Don’t think it’s still around anymore
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Can confirm, if you don’t pedal you stop having ankles
“The difference between screwing around and science is writing it down.” - Adam Savage
Document everything.
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Remachined the sprocket out of hardened steel this time and made a custom bike rack since the last normal rack crumpled under the force. Still about the same architecturally
Edit: also the excessive etape is an attempt at waterproofing cause it’s been pouring lately, and has been working great
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This is amazing
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Quick video of accelerating without any of my pedaling from stop at about 200 watts
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I was able to bike to school up some pretty significant hills and the battery voltage only dropped to 12.6 from 12.9 at start. The cim got fairly hot but it’s still not too hot to touch
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Eventually you could install a CIM-Cooler if it does start to get too warm. They are cheap and decently easy to install. It used to be teams would get vouchers in the digital KOP for a free one. $8 at nextgen or $11 at andymark
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I’m going to look around in the shop at my school that used to do frc for 20 years for one
12 miles of biking with a reasonable amount of my own input power brought the battery down to about 12.3 volts, much better battery life than expected. Also on a funny note, pedaling down one of the hills charged the battery a fair bit
How are you controlling the motor?
I hacked a bbc micro:bit to run arduino and have it running a simple program I wrote that controls a pwm signal with the two buttons and uses the display to show what the motor output voltage is, the motor controller is a random victor spx from a dead team
The controls are mounted on the handlebars
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My endgame FRC transport would be a swerve shopping cart with a roll cage and harness
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Ordered one from andymark (maybe just to justify buying a goat)
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Owning an AM goat is justification enough!
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One of my friends on my team has wanted to ride it for a while, so I let her ride it but didn’t describe how to use it well enough so she accidentally put the cim full reverse while peddling forwards and caught the wagoes on fire that ran to the cim… I’m removing the ability to reverse the motor in software since it was leftover from old stuff.
I got a picture of what I pulled off of it to make the repair before leaving robotics and she took a video of the aftermath
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Today I learned old usfirst.org stickers are fire proof
Im wondering if you could’ve done a compliant wheel or any wheel for that matter, pressed against the back tire and more or less use it after you pedal up to speed. That way you could coast without pedaling and in a situation like what happened there would be slip so as to keep the electrical system from catching fire
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You will lose some of the power transmission this way, but it is definitely safer.
This may pique your interest