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Thomas AIC
Joined: 22 Jun 2009
Posts: 151
Location: Canberra
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Have not made any major changes recently, but it turns out that the minor ones I made have added up to quite a large change. The main change is the chassis, it now has hinged wegdges on all sides but the front, constructed out of 2 layers of 3mm aluminium. the front is 4 layers of the aforementioned aluminium, and the top/bottom are both one layer of the same material. The claw is large bent rod with an unknown diameter, it's quite thick though but was weakened where I attached to the actuator. But I have been experimenting with cheap speed controlling and here are my observations:
- servo controlled DPDT toggle switch -$7 per drive
was really twitchy, and probably wouldn't take a hit
- servo board running relays, running larger relays -$20 per drive
worked slightly, but I won't use it due to the large amount of wiring and like five diferent voltages I needed to use.
these systems have the advantage that they can really use any voltage depending on the relays/switches I use. But both of them have big bang control, which made steering pretty jerky.
I did find a reversible brushed boat controller for $30.00 which claims 50 amps foreward and 20 backward, I am buying 3 to test because they would work better than any of the aforementioned control systems for extremely little cost compared to IBC's sabertooth's and the like. the ESC's have an integrated heatsink, and are waterproof so I don't think they would have any problem running drill drives.
This must be quite confusing considering I have never posted a picture of my bot. I'll try to get one soon. My brother has taken the camera on a school camp so I'll get it soon!
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Mon Sep 07, 2009 7:24 pm |
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