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Has anyone on the list tried to build an industrial 2 axis slide system with accuracy and repeatability in the range of 0.1 to 0.5 micron? We have been quoting such a system that started out as plus or minus 0.5 micron at around six inches of travel. The accuracy would need to be maintained for less than 2 inches of stroke.
We have planned on using a high end motion controller with sine encoder feedback on the servo motors for the velocity loop and high resolution linear scales (1 microinch) for the position loop. We plan to use zero backlash ground ballscrews and extremely low friction slides.
I realize that the slides must be machined very accurately. We also know that the mechanics must be very stiff. Linear motors are probably out due
to environmental concerns and also because one of the axis is vertical.
Has this been done? I believe that it is possible, but I wonder how difficult.
Thanks for any input,
Bill Sturm
Applied Grinding Technologies
We have planned on using a high end motion controller with sine encoder feedback on the servo motors for the velocity loop and high resolution linear scales (1 microinch) for the position loop. We plan to use zero backlash ground ballscrews and extremely low friction slides.
I realize that the slides must be machined very accurately. We also know that the mechanics must be very stiff. Linear motors are probably out due
to environmental concerns and also because one of the axis is vertical.
Has this been done? I believe that it is possible, but I wonder how difficult.
Thanks for any input,
Bill Sturm
Applied Grinding Technologies