Re: replacing feed screw with a hydraulic cylinder

> > > >>Did somebody try to get rid of the feed screw all together
> > > >>and replace it with a hydraulic cylinder?
> > > >>At the first glance it may present several advantages:
> > > >>no backlash, big force at low cost.
>
> </snip>

I did some cad work for a hexapod mill and thought about hydraulic
cylinders. Spool valve parts are the type used in marine power
steering systems. With a little lathe work to eliminate the dead spot.
Planned on driving these with Gecko 320's and two way solenoids. The
pump is a PS pump. (400 psi). Encoder feedback from a gear rack
asmy. mounted on the side of the cylinder.

Thought about playing with the "old" style auto PS systems that had a
separate cylinder and valve, if you can find them anymore. They would
give these away.

Could use a newer style rack and pinion PS with a low cost
stepper/drive.


Any thoughts ?