High pressure coolant/Thermal issues

We are presently testing a H.P. system as a demo. The unit we have is
installed on a 20mm, swiss machine. The coolant we are using is
"Blaser", which is oil. The question i have is we are experiencing a
large movement of dimensions on jobs we have previously ran, without
H.P. The unit we are testing is heating the machine up pretty fast,
causing operators to chase dimensions all day, and when run unattended
at night,"Scrap". Without telling me the obvious,"Get a chiller" or
getting to scientific, i.e. the results of particles in the
oil,volume,resistence,force, friction, various micron filters etc., Has
anyone found this to be an issue with any of their H.P. systems? Or
could this be inherent to the unit we are using.By the way it is an 8
gpm unit.
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What's that Lassie? You say that Bullseyebry fell down the old alt.machines.cnc mine and will die if we don't mount a rescue by 25 Mar 2006 04:39:34 -0800:
I work with a Citizen L25 with an 8 line 7hp 2000psi max HP coolant pump and it will heat the coolant when in use. If you can control the HP pump from within the program, you can try to reduce the use of the HP to only where and when you need it. In addition, you should use as large a orifice (more volume/less pressure) as you can get away with.
You might also try running the HP before making parts to let the machine come up to temp.. Eventually it will get hot enough that it is giving off as much heat as is being generated. Get a cheap electronic indoor/outdoor thermometer to check the temp.
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