Re: Rambling hydraulic post that was: Multiple syncronized spindle question.

["Howard Bailey" <bogmstr-at-infomagic.net>]

> Ray Henry says:
>
snip
> I wrote a digital controller for a hydraulic load frame.  It works very
well,
> except that it does have significantly lower errors once the fluid is up
to
> temp.  I am porting the software from dos to RTlinux to see if I can clear
> things up using a floating point controller, because I am having numerics
issues.

and snip some more

Would it be worth it to take a temperature reading of the hydraulic fluid
and based upon the temperature adjust variables to compensate for the
increased viscosity until the machine warms up?  I know some high end CNC
mills compensate for differential expansion of the glass scales and the
milling table.  Just a thought.

Regards,

Howard Bailey