Re: [CAD_CAM_EDM_DRO] OT Stepper motor for control pumping

Hi CBM (name?),

Sounds like you just need to run a controller program on a PC. PCs are
cheap!

If you don't want the PC, then use a PIC or other uP to generate a
series of steps. A few input lines can select how many Oz. Other lines
can control AUX hardware.

Bryan Mumford has a nice controller for a rotary table (Sherline sells).

http://www.bmumford.com/index.html

A CY525 or CY550 stepper motor controller chip can be programmed to
generate stepper control signals. I've used one to rotate an antenna,
and did some preliminary CNC work with them. They are quite nice for
rotary table controllers.

All it takes is a little development work!

Alan KM6VV


http://www.controlchips.com/

callcbmf wrote:

>
> I looking for away to hook a stepper motor to a Air or hyd cylinder
> and move the piston to calibrate the discharge. What I'm doing is
> filling jars with different oz of grease that I make. I need to
> dispense 1 oz at a time or 1/4 at a time. I would like to make this a
> stand alone system not using a pc this has to be done cheap. As the
> grease sell then I can afford bigger equipment. But all I have to do
> is make the stepper turn incremental amount. the cylinder will push
> the product. But I have to able to change the amount it will turn to
> change the fill volume. And need to activate a lift cylinder to aid
> in the filling.
> Thanks
> Hope in the realm of the group
>