Gatan 656, Руководство пользователя, Страница: 26 / 49

Operation
16 Dimple Grinder User’s Guide
Figure 8 Set grinding by dimple depth.
11. The AutoTerminator may now be switched on (
A
UTO
button).
When the Dial Indicator is within 2-3 µm of zero, the Autoterminator will
automatically switch off the specimen turntable and grinding wheel motors.
Grinding of the remaining 2-3 µm may be done with reduced load and
grinding speed.
Note: A small pocket of dilute paste should be present on the specimen at all
times and the specimen surface and grinding wheel must not be permitted to dry
out. Also, it is recommended the wheel and specimen be occasionally cleaned
and fresh diamond compound applied.
4.6 Set Grinding by Final Thickness
Another method of dimpling is to set grinding by final thickness.
To set grinding by final thickness
1. Set the Counterweight load (20 g) and select a mid-range grinding
wheel speed.
0.000
0.100
0
Zero
stop
Analog dial
indicator
Grinding
wheel
Spring loaded
stylus
Digital
display
Specimen
mount
with
specimen
Micrometer head raised.
Digital display zeroed.
Micrometer head
lowered 100
µ
m
Material to be removed,
100
µ
m (dimple depth)
100
µ
m