CONTROL LINE (Liquid fuels)

francisco · Post by **francisco** » Tue Aug 07, 2007 11:29 pm

hello, I leave some photos here in which see an electronic device that controls the fuel step,

somebody can give information me on this device?

tanks!

FRANCSICO COOREMAN

Diego Gonzalez · Post by **Diego Gonzalez** » Sun Aug 19, 2007 7:26 pm

Hola.

tiene toda la pinta de ser un circuito de modulacion de ancho de pulso. yo he desarrollado varios y los he probado en motores de pequeño tamaño con mucho exito... en fin ya sabes por lo que buscar mas informacion del aparatejo.

A ver si de todas formas alguno mas contesta

francisco · Post by **francisco** » Sun Aug 19, 2007 8:12 pm

hola digo, gracias x contestar... si.. alg de eso crei que era...

de donde sos?
me gustaria q nos pongamos en contacto... muestrame un poco tus pulsos y lo que has logrado con esto... desde ya muchas gracias..

francisco cooreman
rio cuarto, cordoba, argenitna

Jim Berquist · Post by **Jim Berquist** » Sun Aug 19, 2007 9:57 pm

It's a PWM motor speed controller! Google PWM Controller and you will find meny circuits to build. Most are simple.

Jim

Diego Gonzalez · Post by **Diego Gonzalez** » Sun Aug 19, 2007 10:13 pm

Hola de nuevo.

Si te decides a hacer el controlador de ancho de pulso(pwm), te recomiendo que la frecuencia sea de 100hz y a ser posible un circuito digital programable(tambien puedes usar el ne555). A esa frecuencia he obtenido muy buenos resultados con un ciclo de trabajo del 5 al 15% como minimo y una diferenciacion en la velocidad desde el 10% al 80% apreciable. Fuera de esos rangos algunos motores parecian ir a la misma velocidad que en posiciones mas elevadas. (me explico, si el ciclo de trabajo estaba al 80% era casi igual que si estubiera al 100%)

Todo esto con la ventaja del pwm de no perder torque en el motor.

I ask excuses for the English readers to speak Spanish.

Diego

Jim Berquist · Post by **Jim Berquist** » Sun Aug 19, 2007 10:18 pm

My spanish sucks. I can read well enought to see you explained how the PWM works to control motor speed. Well done sir!!!! Thank You! There are circuits that only use a few conponits that will do the job.

The NE555 would do the job most well. Just drive a SCR or fair size transistor to the load.

Thank you : Jim

Jim Berquist · Post by **Jim Berquist** » Sun Aug 19, 2007 10:41 pm

computer translated: http://babelfish.altavista.com/tr

Español limitado del speek I. Entiendo mejor entonces el speek de I. Recepción al foro. Usted encontrará a la mayoría de nosotros amistosos. Todos estamos aquí aprender y compartir. Jim

Diego Gonzalez · Post by **Diego Gonzalez** » Mon Aug 20, 2007 7:03 am

Hi Jim.

My English is good when I must read it, but when I must write it gets worse.So, please in english :lol: The translators are very bad.

ok.I am going to explain what i commented to Francisco.

All those data are based on my own experience experimenting with pwm. I made digital circuits (based on pic16f84 for example) In which was very easy to control duty cycle.

My own experience with small motors (like speed450 or speed600 that are common in fuel pumps) said me that the best frequency of work is to 100 Hz. And that the differentiation in the speed is perceivable in changes of 5%.
The minimum speed could be approximately to 15% and maximum 80%. From 80% the motor works like with DC.

thanks for the welcome

Diego

Anders Troberg · Post by **Anders Troberg** » Mon Aug 20, 2007 12:01 pm

Or, if you don't want to do the electronics, maybe one of these sites may provide something useful:

http://www.servocity.com/html/servo_controllers.html
http://www.basicx.com/Products/servo/servo8t.htm
http://www.active-robots.com/products/m ... gets.shtml
http://www.robotshop.se/catalog/product ... aaac8768af (in Swedish)

I'm just trying to find some excuse to order some of their stuff, but I don't know what to build. Perhaps a CD burner robot?

Diego Gonzalez · Post by **Diego Gonzalez** » Mon Aug 20, 2007 12:28 pm

Hi again;

complementing the information of Anders:

I am going to put links of some servo tester, based on famous the 555 or other integrated circuits. The wiring diagram is simple.Only one Esc(electric speed controller) would be needed to connect to the pump.

http://www.rc-cam.com/servotst.htm
http://www.uoguelph.ca/~antoon/gadgets/servo3.htm
http://www.uoguelph.ca/~antoon/circ/archive/servo5.htm
http://www.electronics-lab.com/projects ... index.html (pic microcontroller)
http://www.hobbypeople.net/gallery/518105.asp
http://www.robotlogic.com/product_servotester.html

and google "servo tester"

And one example of brushed ESC
http://www.bizgreece.com/catalog/index. ... 1ae239e944

Diego.

Jim Berquist · Post by **Jim Berquist** » Mon Aug 20, 2007 10:59 pm

Diego: How bad was the translator?

If you want to control a fuel pump with PWM there are some really simple ciircuits out there. Your right on with the NE555 or NE5557 Low current is better.