pulse generator - Electronic Circuits Projects Diagrams Free

danno · 27th October 2007, 02:43 AM

newbuddy here looking for a way to build a pulse generator to control a hydraulic cylinder . ineed to use a 10k pot to control the speed or( pulse ) to coil of the valve (output pluse max 33hz)

Hero999 · 27th October 2007, 01:19 PM

Please provide more information.

danno · 27th October 2007, 04:07 PM

thanks hero999,

this unit source is 12vdc
could not find a 10k pot nor a coil in the SWcad 111 to draw and test the circuit . all though i can read circuits i've never tried to draw them

Hero999 · 27th October 2007, 04:21 PM

That still isn't enough information.

Current?

Duty cycle?

Ever thought of using an astable 555 timer?

danno · 27th October 2007, 10:50 PM

I'll have to get back the coil i need ,it is at my brother house
thanks again Hero999

mcs51mc · 28th October 2007, 09:46 AM

I suppose you have a proportional hydraulic valve.
That valve will be powered by a PWM circuit controlled by the 10k potmeter.
The faster the pulses out of the PWM, the faster the cylinder will go.

How is the direction of the cylinder controlled?
Do you have another valve for direction, or does the speed valve also control direction?
In other words how does the hydraulic circuit looks like?

From my maintenance experience I should tell you:
Buy existing electronic modules from a well-known factory e.g. Wandfluh.

danno · 31st October 2007, 02:16 AM

It has two micro switches on the joystick to a foward and reverse valve.

this is where the 10k pot is located also

i called my brother , and he said the output volt read 8 vdc , his ampmeter only reads 0 to 20 amps and dose not read low enough

I'll have go out with my meter to check it

what i'm not is a typist

mcs51mc · 31st October 2007, 08:49 PM

Quote:

Originally Posted by danno

It has two micro switches on the joystick to a foward and reverse valve.

this is where the 10k pot is located also

Don't get that

A valve is for me a hydraulic part, it can have one or two electric coils.
Can you make a sketch of both electric and hydraulic circuits, scan them and post them?
Please be a little more accurate when you describe something. Thanks for that

Quote:

Originally Posted by danno

i called my brother , and he said the output volt read 8 vdc , his ampmeter only reads 0 to 20 amps and dose not read low enough

I'll have go out with my meter to check it

what i'm not is a typist

Better take a scoop with you

The power supply is 12Vdc right? You measure 8V over the coil. Or there is already a PWM involved somewhere or the pot meter divides the 12V power for the valves.

Back to the drawing board: What's the problem?

danno · 31st October 2007, 11:07 PM

Draft2.asc
I hope i sent this right

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27th October 2007, 02:43 AM	(permalink)
danno	pulse generator newbuddy here looking for a way to build a pulse generator to control a hydraulic cylinder . ineed to use a 10k pot to control the speed or( pulse ) to coil of the valve (output pluse max 33hz) Last edited by danno; 27th October 2007 at 02:59 AM.

27th October 2007, 01:19 PM	(permalink)
Hero999	Please provide more information. __________________ I also post at the following sites: http://www.stop-microsoft.org http://www.heated-debates.com Screen name: Aloone_Jonez And http://www.silicontronics.com, same screen name as here.

27th October 2007, 04:07 PM	(permalink)
danno	thanks hero999, this unit source is 12vdc could not find a 10k pot nor a coil in the SWcad 111 to draw and test the circuit . all though i can read circuits i've never tried to draw them Last edited by danno; 27th October 2007 at 10:56 PM.

27th October 2007, 04:21 PM	(permalink)
Hero999	That still isn't enough information. Current? Duty cycle? Ever thought of using an astable 555 timer? __________________ I also post at the following sites: http://www.stop-microsoft.org http://www.heated-debates.com Screen name: Aloone_Jonez And http://www.silicontronics.com, same screen name as here.

27th October 2007, 10:50 PM	(permalink)
danno	I'll have to get back the coil i need ,it is at my brother house thanks again Hero999 Last edited by danno; 27th October 2007 at 10:59 PM.

28th October 2007, 09:46 AM	(permalink)
mcs51mc	I suppose you have a proportional hydraulic valve. That valve will be powered by a PWM circuit controlled by the 10k potmeter. The faster the pulses out of the PWM, the faster the cylinder will go. How is the direction of the cylinder controlled? Do you have another valve for direction, or does the speed valve also control direction? In other words how does the hydraulic circuit looks like? From my maintenance experience I should tell you: Buy existing electronic modules from a well-known factory e.g. Wandfluh. Last edited by mcs51mc; 28th October 2007 at 10:23 AM.

31st October 2007, 02:16 AM	(permalink)
danno	It has two micro switches on the joystick to a foward and reverse valve. this is where the 10k pot is located also i called my brother , and he said the output volt read 8 vdc , his ampmeter only reads 0 to 20 amps and dose not read low enough I'll have go out with my meter to check it what i'm not is a typist Last edited by danno; 31st October 2007 at 02:18 AM.

31st October 2007, 11:07 PM	(permalink)
danno	Draft2.asc I hope i sent this right