Re: replacing feed screw with a hydraulic cylinder

My experience with Air logic is:
If the parts are from a good brand (like Festo) and filters are OK and
the sistem never recieved oil. >>> Just change the hoses and go.
If any of the abouve points is not true >>> Don't hastle and throw the
stuff away and go with a PLC or PC.
Just my experience of 14 years maintenaance work.
Sven Peter

--- In CAD_CAM_EDM_DRO@y..., "blown_mgb_v8" <jblackwood5@i...> wrote:
> OOps, didn't mean to split the thread... Actually, I've been really
> wondering if it would make sense to try to keep the hydraulic system
> intact. I guess much depends on how well it works and what can be
> done to interface a PC with the air logic system. From past
> experience with air logic though I'm pretty doubtful.
>
> Jim
>
> --- In CAD_CAM_EDM_DRO@y..., "Sven Peter" <peteryco@r...> wrote:
> > Hello Friends,
> > I had in mind to change my hydraulic copy lathe to CNC. But
> everybody
> > I consulted said: Better not because its way it becomes more
> expensive
> > than servomotors and damn inacurate.
> > I didn´t believe until I made a test with a clients proportional
> servo
> > valves.
> > Now I second the warning:
> > Too inacurate!
> > Too Slow!
> > Pretty expensive!
> > Oscilation (0.02mm on radius!!!!)!
> > Trouble with dirt!
> >
> > The day I may convert my lathe You can be sure I will kick out the
> > pistons for ball screws and servos.
> > Good luck
> > Sven Peter
> >
> > --- In CAD_CAM_EDM_DRO@y..., Marv Frankel <dcdziner@p...> wrote:
> > > Guys,
> > > I've been following this thread, and although I've never
> done
> > it, I
> > > wonder if the coefficient of expansion of the hydraulic fluid,
> would
> > cause
> > > some accuracy problems? On a cold day, it would cut differently
> than
> > on a
> > > warm day, and would you have to reset your Z axis every time the
> > temperature
> > > changed?
> > >
> > > Marv Frankel
> > > Los Angeles
> > >
> > > ----- Original Message -----
> > > From: "Ray Henry" <rehenry@u...>
> > > To: <CAD_CAM_EDM_DRO@y...>
> > > Sent: Saturday, November 30, 2002 6:28 AM
> > > Subject: [CAD_CAM_EDM_DRO] Re: Re: replacing feed screw with a
> > hydraulic
> > > cylinder
> > >
> > >
> > >
> > > > From: "blown_mgb_v8" <jblackwood5@i...>
> > > > Subject: Re: replacing feed screw with a hydraulic cylinder
> > > <s>
> > > > So here's the question(s), What would be suitable for
> retrofitting
> > > > the z axis (quill), what is needed to drive the steppers, can
> an
> > old
> > > > P-90 IBM clone PC be used to run it, and what software is
> > available?
> > >
> > > Hi Jim
> > >
> > > Yes the quill can easily be fitted with ball screws because
> there is
> > a
> > > yolk that extends parallel to the x axis from each side of the
> > quill.
> > > That's where the air-over-hydraulic cylinder for z is attached.
> > >
> > > Ray
> > >
> > >
> > > Addresses:
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