We’re going to have a robot in a demonstration. This robot has two “wings” on it, each of which is raised and lowered with the use of a drill motor (two drill motors in total). I would like for there to be a toggle switch to raise the wings (ie. run the two drill motors forward) and then toggle the other way to lower the wings (ie. run the two drills backwards). Of course, center on the toggle would be stop. I understand i’m looking for a three way toggle w/ center return. In addition, this toggle would need to be on about a 8-10’ cord.
So, what’s the easiest way for this to be accomplished? I looked in radio shack today, and saw a center return toggle rated to 25amps, but i’m not sure if that’s enough. Secondly, i’d rather not have this switch on 10’ of 12 gauge wire. (That’s what i’d need if i were to directly wire all this together). I was wondering if i could use a switch or pot to contron a victor, to in turn control the motors… however I’m not sure how to go abotu doign that. I looked at this thread (http://www.chiefdelphi.com/forums/showthread.php?t=14565), but it seems rather complex for what i’m looking for. All i want is simple off, on, and reverse.
Lastly, this of course isn’t for competition, so i really don’t care how “shadey” teh setup is. All it needs to do is work for a few hours, and not catch fire.
Easy, use two relays. Making sure they’re rated around 30 amp, double pole single throw. You also need the momentary on off on switch and 3 conductor wire probably 18 AWG is best. Its crude but works fairly well, I used this setup… well something similar on a wheelchair base which we were going to use as a motorized cart to carry the robot.
i think the easiest, safest way is to replace the drill motors with something with a more slower freespeed. unless you are gearing it down waaaaaay low already, it will go fast… cuz its either full throttle or no throttle. not too good for the motors either… wear down the comm and brushes quick. well, using les voltage would also help in your case. wont use the motor to its full potential but its doable. slower, easier to control, less heat, etc
There are many ways to skin a cat… Mike’s relay diagram will work, however, I’d add a circuit breaker in series with the battery (at a minimum).
I agree with greencactus in that a drill motor draws over 100 amps at stall conditions. It sounds like a window or seat is more applicable., In fact, I’d recommend a pneumatic system for this task. It would be safer and very entertaining when the cylinder actuates.
However, I was able to find a kind FIRST friend who was able to whip together some quick pbasic code for me… so we shall test it tommorrow and see how well it works.
lol… the robot has an RC on it, and we build the bot with drills connected to threaded rods to make the wings flap. My only drawback to the RC was i had no way of programming it.
