Speed control help

[fede88]

Hi to all, im a new member of this forum. Sorry for my english but im italian, i come in this forum beacuse there arent italian robots forum.

Im build a robot, i have 2 motor of a wheelchair, i want to build the speed control.

someone can explain to me how to build it.


thx

[team_ireland]

Speed control help

In English:
Not trying to offend you but building a speed controler for a heavyweight is very difficult unless you just want on and off control.

Unless you are an electronic engineer I would not try to build a proportional speed controler.

Here is an on off reverse speed controler diagram by bugs:
http://www.bugs.nl/media/source/projects/speedo/relay-layout.jpghttp://www.bugs.nl/media/source/proj...lay-layout.jpg

Regards
Ian Mc Donald.

Ed in italiano
Sta provando ad offenderlo ma sviluppando un controler di velocit  per un heavyweight molto difficile a meno che desideriate appena il controllo avanti/stop.

A meno che siate un assistente tecnico elettronico non proverei a costruire un proporzionale accelero il controler.

Qui ¨ sopra fuori dello schema dinversione del controler di velocit  dagli Bugs: http://www.bugs.nl/media/source/projects/speedo/relay-layout.jpghttp://www.bugs.nl/media/source/proj...lay-layout.jpg

Considera
Ian Mc Donald.

[chompalot]

Speed control help

would a speed controller relying on a servo and microswitches pass a tech check?

hear my latest efforts to develop a speed controller http://www.chompalot.co.uk/motorcont1.htmwww.chompalot.co.uk/motorcont1.htm

Si

[woody]

Speed control help

You could try ...
http://www.zapiweb.com/mainita.htmhttp://www.zapiweb.com/mainita.htm
They might be generous and give you a couple.

Or purchase some from http://www.technobots.co.uk/en-gb/dept_68.htmlhttp://www.technobots.co.uk/en-gb/dept_68.html

[bugs]

Speed control help

As long as you use a failsafe on the servo a relay drive system will pass the techcheck. Ive seen several fethers and heavys running on relays.

[fede88]

Speed control help

thx very much.

It is possible construct a circuit to connected directly to the receiver, to creat an on off reverse speed control??

[team_ireland]

Speed control help

Just use a servo such as this:
http://www.sussex-model-centre.co.uk/B305%5FServo-4834.htmhttp://www.sussex-model-centre.co.uk...Servo-4834.htm

That is what the white cross represents. You will also need one of these on each servo:
http://www.sussex-model-centre.co.uk/FS%2D1%5FFailsafe%5FUnit-1402.htmhttp://www.sussex-model-centre.co.uk...FUnit-1402.htm
Also available from:
http://www.technobots.co.uk/index.html?target=dept_229.html&lang=en-gbhttp://www.technobots.co.uk/index.ht...tml&lang=en-gb

Regards
Ian

[woody]

Speed control help

Fredrico have a look at this thread...

http://www.fightingrobots.co.uk/discus/messages/13/3753.html?1109164066http://www.fightingrobots.co.uk/disc....html?11091640 66

[julian]

Speed control help

Have a look at the middleweight section. My idea to use the original wheelchair controllers worked by servos was best, of course.

[fede88]

Speed control help

can you give me the link or the name of your discussion thx

[julian]

Speed control help

Extreme Fighting Machines » Light and Middleweights » Some general tips please

[fede88]

Speed control help

i have decided, i contruct this circuit:
http://www.bugs.nl/media/source/projects/speedo/relay-layout.jpghttp://www.bugs.nl/media/source/proj...lay-layout.jpg

but I dont know the type of the rel¨, can you says me the type. thx

[team_ireland]

Speed control help

You are using wheel chair motors so you would need something like:
70amp SPDT relays (sometimes called 70amp SPCO relays)

Regards
Ian

[fede88]

Speed control help

The wheelchair motor generate 70amp at 24volt???

thx, what means SPCO?

[jim]

Speed control help

SP means single pole, which means there is one moving contact in the relay. CO means change-over, which means the moving contact moves between two contacts. One is connected to the moving contact when the relay is off, the other is connected when the relay is on. You can also get SPNO relays in which you only get a contact when the relay is switched on. You really want the SPCO type if you want to build a motor controller.