Yes, I would be surprised of those cylinders were not special. I remember seeing those machines at GM when I used to work there years ago.
They could really beat a car's suspension up and they would run them for days and days to see if stuff would break, tear out, wear out, etc. They were really quite violent. I bet that hydraulic power system has a bunch of accumulators for super fast flow response. Another one: https://www.youtube.com/watch?v=paT-JNWWV-w Looks like they have the servo valves mounted right on the cylinders for minimum response time.. Dave On 11/9/2015 11:00 AM, andy pugh wrote: > On 9 November 2015 at 15:32, Dave Cole <linuxcncro...@gmail.com> wrote: >> I've done quite a bit of hydraulic servo work for custom machines. >> You can use regular industrial cylinders for positioning. > I imagine that the reason that fatigue testing machines use > hydrostatic cylinders is that they want to be fatigue testing > machines, not hydraulic cylinder seal testing machines. > ------------------------------------------------------------------------------ Presto, an open source distributed SQL query engine for big data, initially developed by Facebook, enables you to easily query your data on Hadoop in a more interactive manner. Teradata is also now providing full enterprise support for Presto. Download a free open source copy now. http://pubads.g.doubleclick.net/gampad/clk?id=250295911&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users