Technical Bulletin AMTB009
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Adjusting Stage Limit Switches
Introduction
Every ProScan motorized stage is fitted with limit switches in both the X and Y
axes so that the stage automatically comes to a halt when it has reached its
maximum travel in all directions. These limit switches are normally factory set to
give the correct amount of movement for a particular microscope stand. It may be
necessary at some time to make adjustments to the limit switch positions. For
example different optics may need to be mounted onto the microscope which may
cause clearance problems, to avoid damage to these components the stage travel
may need to be restricted.
The following procedure explains how to make these adjustments.
Tools Required
Small flat blade instrument screw driver.
Adjustment Procedure
Due to the positions of the drive cover fixing screws it may be necessary to
remove the stage from its microscope or mounting stand before attempting this
procedure.
1. Ensure that the stage is disconnected from the controller before removing any
covers.
2. Loosen and remove the drive cover fixing screws (see fig.1). Technical Bulletin AMTB009
-2-
3. Remove drive cover.
4. Loosen limit switch fixing screws (do not remove) so that the limit switch and
clamping plate (see fig.2) can be freely moved along the adjustment slot in the
limit switch mounting plate.
5. Move limit switch to the desired position and re-tighten the fixing screws.
6. Before replacing the drive cover, mount the stage onto its stand and check that
the limits are correctly adjusted. If further adjustment is required, repeat the
above procedure until limit switches are positioned correctly.
7. When the limit switches are correctly positioned, replace the drive cover.