Mechanical Hard Stop Adjustments - Aerotech APR150DR Hardware Manual

Hardware Manual

4.3.2. Mechanical Hard Stop Adjustments

Stages equipped with the hard stop option (-HS) have the hard stops set at the factory prior to
shipment. Although the hard stops are adjustable, contact Aerotech before you change their
position because the optical limits could need to be updated. If you change the hard stop position
but do not update the optical limits, the stage travel could hit a hard stop and cause damage the
stage or payload.
WARNING: Mechanical Hazard! Do not adjust the hard stops to an angle smaller than
the limit travel of the stage. Maintain at least ±5° of travel between the optical limits
and the hard stops. Allow for enough over-travel between the electrical limit and the
hard stop for the stage to completely decelerate and stop before it hits the hard stop. If
the stage hits the hard stop, that could result in damage to the stage and payload and
the possibility of injury.
Use the procedure that follows to adjust the hard stops. Refer to
details. Consult the factory if more information is required.
1. Disconnect all electrical power from the stage.
2. Remove the tabletop/graduated scale assembly with [QTY. 8] M6 socket head cap screws.
Remember the orientation of the assembly so that you can put it back on in the same position.
3. Flip the tabletop assembly upside down and remove the [QTY. 3] M5 SHCS from one of the hard
stops. Be sure to leave the hard stop over the holes it was mounted to.
4. Gradually slide the hard stop to the required mounting hole. The angle change for the mounting
screw is 11.25°
5. Reconnect the hard stop with the M5 SHCS.
6. Repeat steps 3 through 5 with the second hard stop.
7. Loosely reattach the tabletop assembly to the shaft in the same orientation as it was in when you
removed it.
8. You will now need to realign the tabletop to the shaft.
A. Insert the [QTY. 8] M6 screws that attached the tabletop to the shaft down into the
counterbores until they just sit in the counterbore. Do not tighten.
B. Use an indicator to measure the radial runout of the inside diameter of the tabletop.
C. Spin the stage by hand and adjust the location of the tabletop until the radial runout of the
reference surface is 5 microns or less.
D. Tighten the M6 socket head cap screws to 8 N·m. Work up to the final torque incrementally,
and check the radial runout periodically during the tightening process. Readjust as necessary.
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Figure 4-2 and Figure 4-3
APR150DR
for
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