Aerotech’s Enhanced Throughput Module (ETM) improves the positioning
performance of high-dynamic motion systems by directly
measuring the unwanted motion of the machine base and
communicating it back to the controller. By working in
concert with the Dynamic Controls Toolbox and the
Aerotech controllers, they allow the servo system to do a
superior job of executing the desired motion path.
Unwanted base motion typically occurs
because the force applied to accelerate
the stage reacts against the machine
frame. The machine frame responds with
an oscillation that can extend over
hundreds of milliseconds (Figure 1). Fine
positioning or high-dynamic motion
requires that the controller wait for this
oscillation to subside before continuing
with the process. This forces the
controller to wait or causes inaccurate
motion, either of which reduces
productivity. The most appropriate
solution is an optimized frame and
machine-base design, but in many cases
this is either not practical or is
prohibitively expensive.
The Aerotech ETM provides a
low-cost solution for improving the
productivity of new and existing
equipment with easy installation and no
changes to existing mechanical hardware.
Figure 2 shows a point-to-point move. As can be seen from the plot, the ETM and Dynamic
Controls Toolbox are able to reduce settling time by 21%.
Figure 3 shows integration on a Hermesys™ system and
Figure 4 shows integration on the AGS15000.
Contact your local Aerotech representative to see how
ETM can make your machine more productive.
|
