On Sun, Sep 22, 2013 at 10:50 PM, Stuart Stevenson <stus...@gmail.com> wrote: > Gentlemen, > I want to control a hydraulic cylinder (extension and retraction) with > LinuxCNC. > I want to use an axial piston swash plate pump. > I want to control the swash plate with a servo motor. This method has been used, albeit with a servo valve instead of a servo motor. In fact, I think it might even be fairly common. I think a servovalve is going to outperform a servo motor and will be cheaper. Although if you use a linear scale the hunting will drive you crazy with a valve. Moog has gone into this business with their linear actuators.
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