acceleration circuit?

[George Price]

I own an RC tank that has a simple on / off motor control. When you move
the joystick forward or reverse it jumps forward at full speed. Is there a
way to have motors gradually accelerate to it's top end and then decelerate
when the joystick is zeroed?

 

[Rene Tschaggelar]

George Price wrote:

I own an RC tank that has a simple on / off motor control. When you move
the joystick forward or reverse it jumps forward at full speed. Is there a
way to have motors gradually accelerate to it's top end and then decelerate
when the joystick is zeroed?

Sure. With a switchmode power controller. That should be
available as optional item at your preferred shop.

Rene
--
Ing.Buero R.Tschaggelar - http://www.ibrtses.com
& commercial newsgroups - http://www.talkto.net

 

[John Woodgate]

I read in sci.electronics.design that George Price
<gprice7418@wowway.com> wrote (in <kdOdnRzgbcrb_ovfRVn-
pg@wideopenwest.com&gt about 'acceleration circuit?', on Fri, 18 Feb
2005:

I own an RC tank that has a simple on / off motor control. When you move
the joystick forward or reverse it jumps forward at full speed. Is there a
way to have motors gradually accelerate to it's top end and then decelerate
when the joystick is zeroed?


Yes, but it's not all that easy. You need pulse-width modulation motor

speed control, with automatic pulse-width variation. The problem is to
make the control circuit losses very low, otherwise the top speed will
emulate a WW One tank.
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk

 

[Rich Grise]

On Fri, 18 Feb 2005 16:51:03 -0500, George Price wrote:

I own an RC tank that has a simple on / off motor control. When you move
the joystick forward or reverse it jumps forward at full speed. Is there a
way to have motors gradually accelerate to it's top end and then decelerate
when the joystick is zeroed?

Check in rec.models.rc.* (there's a bunch of models.rc. groups.) Radio
Control sets have been doing this for years. You get a thing that plugs
in where a servo plugs in, called a "motor controller". It does exactly
what you describe.

You can buy it cheaper than you can build it.

Good Luck!
Rich