Motorized Joyrider

[wannabeaflyer]

Hi Guys just to share some of my past experiances with wiper motors .. they are cheap brilliant and seem up to the job but one thing i have found and it may just be my luck but of the 4 motor that i have they all seem to run slighty faster in one direction than the other ??? the electrical connection all bypass and speed controllers built into the motors so i figure it may be a design issue ... anyone want to chip in on this situation

[IanH1960]

Suggests their "timing" might not be neutral ie the brush/commutator set up favours one direction of travel and they may not actually be true bi-directional motors.

Ian

[TronicGr]

Its true that car wiper motors are desinged to rotate only one direction. Thats way the rotate a little slower the other way. But using a microntroller you can control the speed of the rotation easily. That what I do with my proportional servo controller and have equal speeds on both directions!

I'm making new motion controller, to replace the one I currently have, that is AVR based and it does multiple position checks per data set (motion data that recieved from the computer)! Thus more presice control of the speed and the position can be archieved this way. So far, the results from the tests looks good.

RobiD,
There are several car wiper motors, and the strongest I could find (and more expensive) were on BUS type vehicle. These are really strong motors!!!


Regards, Thanos

[TronicGr]

Hi to all,

I finally finished the long waited english version of my site.

Its still a draft but the most important things are there!

http://ptyxiouxos.net//greekbotics/u..._simulator.htm

enjoy!

Regards, Thanos

[TronicGr]

Hi,

Its some days now that I posted the beta version of my avr motion controller for anyone is willing to test it. It can be found in this page:

http://www.x-simulator.de/forum/tron...-t559-s70.html

I did my own tests using a german PWM motor controller (RN-VN2 Dualmotor controller) but I think that any PWM motor controller can be used too as long it has three inputs for each motor:
1. PWM signal,
2. Enable1,
3. Enable2

It retrieves data from serial port on 115200bps and drives the PWM channels for the motors on 23.74kHz !!!

Regards, Thanos

[RobiD]

Hi Thanos,

Where did you get the pulleys that you have attached to the wiper motors from, or what are they off of.

Thanks
David

[TronicGr]

Hi Thanos,

Where did you get the pulleys that you have attached to the wiper motors from, or what are they off of.

Thanks
David

I bought them from local hardware store. They are normaly used along with a hook on ships and sails to drive steel cables etc.


BTW, I implementing support for of KT-5198 motor controllers on my AVR motion controller either PWM or R/C connection! Soon I will post a relative beta version on it!

Regards, Thanos

[RobiD]

Thanks Thanos.

I will keep an eye on the thread for your post.

David

[rotorxtcy]

Hello;
Has anyone thought of using actuator (from ebay) to control motion? I know he has used wiper motors but I want to be able to make the unit cleaner without so much around it. I will be using three projectors and a LARGE wrap around screen for mine. I still want the motion but I don't want to use all the things necessary for the wiper motors it will take away from the outer view.
please advise if you have any suggestions, all good are welcome.
rotorxtcy