Society of Robots - Robot Forum
Electronics => Electronics => Topic started by: DAR748 on January 16, 2008, 01:01:45 PM
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Hello everyone, great forum you have here.
Well I always wanted to build a robot, but either never had time or money.
We'll now I have time & no money. But I got the biggest part.
I got a electric wheelchair runs great but it's alittle beat up.
It has the charger onboard, new batteries, and the price was right.
Plus it will put a 300lb man a pretty good speed. And I read here that they are good setups to start.
I pulled the joystick box off & opened it up ;D
From the control board to the joystick there are 5 wires.
My question is could I remove the joystick & hook a remote right up to it, or will I have to buy or build a speed control
I'm going to start with a lawnmower / snowblower
Yes I see alot of people doing it but I just gota jump on the bandwagon.
I'm going to take it a step above all the internet setups by adding a deck lift. Then for the winter I have a small 2cycle snow blower that i'm going to replace the mower with.
Again Great site & thanks for any help
DD
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from what I've heard people have put in their own speed control
BUT
open up the controller and upload pics of the inside circuit parts ( where all the electronics are) take lots of pics and then we'll help you better
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http://members.iinet.net.au/~tnpshow/RCLM/advint.htm (http://members.iinet.net.au/~tnpshow/RCLM/advint.htm)
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Ya that guy really doesnt show what he did. And the control I have is different.
My background has all gas cars afew planes & a heli so i'm alittle out of my field here, But can learn anything.
Don't want to add the pic as they are huge so you can see them clear.
http://home.insightbb.com/~danswoodshop/ch.JPG
http://home.insightbb.com/~danswoodshop/ch1.JPG
http://home.insightbb.com/~danswoodshop/ch2.JPG
Thanks
DD
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hmmm...the pics are a bit blurry but i have done this before and hooked up my computer joystick to a five digit keypad...so it is possible but hard..
~smash
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connected to a 5 digit keypad meaning what??? what did the thing do?
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I'm going remote control not sure how a keypad would help me.
Will be getting a 4ch radio next week.
As for the lift on it I think im going with a threaded rod like on a cnc.
Fast easy & FREEEEEEEEEEEE I love that word.
What I was thinking was use servo wires & cut the joystick off.
Try & find a wire control diagram & hook right to the receiver.
Do you think this would work >?<
Thanks
DD
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hmm..yea that might work i would prob have no idea tho :D
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What I was thinking was use servo wires & cut the joystick off.
Try & find a wire control diagram & hook right to the receiver.
Do you think this would work >?<
Thanks
DD
NO
ok the reciever is giving out a pulse which is will work for the servos only! The controller might take a pulse but it probably takes a different pulse and probably operates differently. don't do it
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lol as i said i have no idea lol
~smash
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Ok what would be a "low cost" way to make it work >?<
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if you could find a set thats cheap theres a way :D
~smash
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What I was thinking was use servo wires & cut the joystick off.
Try & find a wire control diagram & hook right to the receiver.
Do you think this would work >?<
Thanks
DD
NO
ok the reciever is giving out a pulse which is will work for the servos only! The controller might take a pulse but it probably takes a different pulse and probably operates differently. don't do it
If the controller you are talking about is a speed controller for a dc motor than it will operate just like a servo (at least from a control stand point) so you can send the same signals to a motor controller that you can to a servo and the controller will convert that signal into something the motor understands (so basically a dc motor with a controller is just a really expensive modded servo)
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http://www.pennyandgiles.com/docGallery/228.PDF
I found this.
Now I'm not sure my idea will work.
What it looks like is a old manual speed control off a rc car.
The # on the control panel are Perry + Giles Pilot Type # D49669/4
But if I can't wire this cheap I'll have to make a servo plate that will let both servos swing.
Really easy idea but it ill be big & ugly, and I will also lose function of the joystick its self.
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reminds me of this post:
http://www.societyofrobots.com/robotforum/index.php?topic=2635.0
you might also find these wheelchair posts (http://www.societyofrobots.com/robotforum/index.php?action=search2;params=YWR2YW5jZWR8J3wwfCJ8YnJkfCd8MiwzLDQsNSw2fCJ8c2hvd19jb21wbGV0ZXwnfHwifHN1YmplY3Rfb25seXwnfHwifHNvcnR8J3xyZWxldmFuY2V8Inxzb3J0X2RpcnwnfGRlc2N8InxzZWFyY2h8J3xqb3lzdGljayB3aGVlbGNoYWly) useful
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what you want is a very powrful ESC.
electric speed controller
it takes a servo imput and drives the motors based on that
but sadly they are pretty expensive, unless you can take the drivers from your control board