On Mon, 14 May 2012 20:40:14 -0500 Jon Elson <el...@pico-systems.com> wrote:
> Stuart Stevenson wrote: > > I had two MHP machines. MHP = M(oog) H(ydra) P(oint) > > They ran gcode just like any NC/CNC machine. Each linear axis had > > two cylinders opposing one another. A hydraulic servo valve > > released pressure from one or another cylinder to allow the table > > to move away from the high pressure side. > > The positioning was high resolution Heidenhain glass scales. > > > OK, that was a much later version. There was an original one that > had a pneumatic encoder, > holes in one plate lined up with tubes in another plate to encode > position pneumatically. > And, I'm pretty sure it wasn't able to execute G-code. Moog made a > number of versions > of the hydra-point control. > > Large hydraulic pump beside the machine. > > Very smooth, very accurate, howling, oily mess. > > > Yeah, hydraulics is certainly old-school. Inefficient, noisy and > messy. > > Jon Just as esoteric are hydraulic servo motors; I used to have the manual for a Fujitsu. Never got a look at one. Dave > ------------------------------------------------------------------------------ > Live Security Virtual Conference > Exclusive live event will cover all the ways today's security and > threat landscape has changed and how IT managers can respond. > Discussions will include endpoint security, mobile security and the > latest in malware threats. > http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > _______________________________________________ Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
