Gatan 656, User Manual, Page: 37 / 49

Performance Check
Dimple Grinder User’s Guide 27
To align grinding wheel
1. Set up the Dimple Grinder as for grinding a specimen.
2. Turn on both the specimen turntable and grinding wheel motors.
3. Carefully lower the grinding wheel onto the surface of a smooth, stain-
less steel, specimen mount.
Verify by the Dial Indicator that contact is made between wheel and mount.
Let it run for a few seconds.
4. Raise the Platform to its upper position.
5. Switch off both motors.
6. Place the stereo microscope over the Magnetic Turntable.
Ensure that it is properly seated.
7. The point of contact should be visible on the specimen mount surface.
The contact point should be a small circular spot centered within the cross
hair of the stereo microscope.
Note: Should the point of contact appear as a ring instead of a spot, it indicates
the pivoted Platform is out of alignment. This is a factory sealed adjustment
which the user should not attempt to correct. Contact a Gatan service represen-
tative.
5.6 Microscope alignment
If the contact point (Item 7 above) is not centered, proceed as follows to align
the microscope.
1. Use the tool provided with the microscope to rotate the “Y” adjust
screw (see Figure 6).
This will move the cross hair front-to-back relative to the spot centerline.
2. Use the “X” left/right adjust screws to shift the cross hair relative to the
spot centerline.
3. Switch on the specimen turntable and confirm the center of rotation
corresponds to the optical axis of the microscope (cross hair).