Re: hydraulics with CNC

We use steppers without feedback without trouble because we make sure
that we don't drive them too fast for the load etc. I wonder if some
simple electronics could be made so that the hyraulic ram would act
like a stepper. In other words a step pulse comes in and the ram in
turned on until a certain number of pulses have been received from
the encoder then it is turned off. Assuming you don't send the
pulses too fast it would work OK. It also assumes that the ram
doesn't need true servo control to hold it in lock.

Just a thought, don't know enough to say much more.

Graham