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tetraPark
Joined: 07 Oct 2013
Posts: 62
Location: Brisbane / Ipswich
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Hi chaps,
Inaugural post here! I'm in similar situation to evil_dan (in fact I think we may have talked to eachother at the Nationals in Ipswich just recently). At the moment i'm looking for wisdom about what parts for a first machine.
I've poured over most of the how to / getting started forums (damn fine stuff for noobs such as myself), and so think I have a pretty good general idea of parts and costs.
I intend to build a featherweight and stick pretty close to the type that Angus and Steve have provided instructions for... with a few exception
I am hoping to use 4x 18v drill motors for drive (1 per wheel), and was wondering (
first question
) what the best esc choice would be. I'm not intending this to be a push bot. Cost considerations are important to me, but I'm willing to spend a little extra if it will mean less chance of killing components. So 4x 30amp, or larger?
Bit of context for next question: I would ultimately like to experiment with mecanum wheels on this machine. Long story short, to do this using the HK 2.4Ghz 6Ch Tx, I will end up having not enough mixing channels (it comes with 3, not the 4 needed) to control the drives in all directions.
Thus my question
: I have read around the net that it is possible to y-spit a channel output from the rx between 2 escs without any trouble (meaning, the motors powered by said escs ran basically with equal power to eachother, with seemingly no performance loss; ie like a mixed channel). Does anyone have a dissenting opinion from this. Otherwise this would seem to solve my little problem, and that is radio package I will purchase.
Finally, last question
, I'm a little confused as to where to look for the next event (I know I've offended the gods of thread posting by asking this here...). I live in Bris (workshop in Ipswich though), so just keep my eyes on the QLD Arenas thread? Hope to meet with some folks and talk shop at the soonest opportunity.
Cheers!
(p.s. I like your concept design dan )
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Mon Oct 28, 2013 3:06 pm |
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Ellis
Joined: 21 Jul 2012
Posts: 129
Location: Shopshire, England
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Should be possible to tell if certain drills are just 12v drills sold as 18v by finding out their rpm. Assuming standard 36:1 gearboxes are used; if the drills are sold as capable of 550ish rpm, they're using regular motors at their designed voltage, if they're sold as capable of up to 825ish rpm then they're overvolted roughly by 1.5x their nominal v. I'd be surprised if they are just putting 18v stickers on some motors, but not that surprised, lol, yay mass production!
Also, the robot combat world needs more omniwheel(ed) robots, will be following your build, good luck!
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Tue Oct 29, 2013 2:10 am |
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