hey nick,that is one kick *** little bot you made there,cool i fly r c helis and planes myself,question? where are the servos? how do you control turning and reverse ? electric speed controller?
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Thread: Home made air cylinder
11-27-2007, 03:17 PM #11Member
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11-28-2007, 07:13 AM #12
I'm using 5 channels now....left stick controls left side, forward stick forward and back is reverse....Right stick controls right the same way.
Left stick...left and right controls a relay thats switches power from 12 to 24
VDC to provide 2 speeds. A variable speed control for r/c and these size motors would be be very expensive....$5-$600 when I checked about six years ago when I built this.
Right stick.....to the right opens an air solenoid to raise the front forks.
to the left opens a different solenoid to let the forks down and also a loss of some air per cycle. The air tank is a 50 lb freon drum.
The forks will lift about 150 lbs.
The 5th channel(retracts switch) turn the headlights and taillight on and off.
The receiver gets its power from a Radio Shack 12 v power thing w/different outputs for cd players etc.
To answer another persons question....the bot is a skid steer like a Bobcat.
It has a lot of torque plus it's just fun to mess with. Sometimes I put a wireless camera on it and control it from inside my shop with the door closed
watching a tv. That's harder than one would think because of a single straight ahead view.
But it also does work around here. It pulls my 3 seater Jet Ski on trailer around and sometimes with the small lawn trailer I have in the idea gallery, it hauls yard stuff etc. Originally I made this to go get my morning paper on slick icy days but I just got carried away. Maybe just a bit of overkill. The contactors, micro switches all come from air conditioner parts and icemaker stuff. The contactors are 24VAC but work fine on 12VDC.
The only thing bought new for this were the sprockets and chains and headlights. Even the cab is modified a/c metal housings welded together. If you haven't seen it go to youtube and enter GOT BOT? and see the video.
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11-28-2007, 09:27 AM #13
good way to get the morning papper if ya ask me, not over kill at all.
thanks for the pic's.
hope i helped
feel free to shoot me an e-mail direct i have time to chat. firstname.lastname@example.org
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11-28-2007, 06:53 PM #14
Very, very interesting!
The Bot kind of speaks for itself, real nice! I was more interested in your hydraulics's (knowledge). Now please PLEASE bare in mind I know little if nothing about them but am interested in learning because I have a project (personal) that I'm going to undertake some day that will require custom hydraulics. I have studied schematics on their structure and operation and could probably fake one if I had to. But my problem is that I have never been able to understand how to develop a rating i.e 5 ton, 10 ton etc. Or perhaps to better put it, how would one go about building a 5, 10 or 15 ton jack? Is there a formula such as: cylindar lenght, width, piston design etc. Or is it based mainly on psi?
Been wondering, any thoughts?
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11-28-2007, 07:23 PM #15
Thats pretty darn neat! Now if you could only adapt a mower deck and GPS to automatically mow the lawn
11-28-2007, 09:41 PM #16Senior Member
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