Mounting The Grinding And Polishing Disc; Inserting The Specimen Holder; Programming - struers Abramin Benutzerhandbuch

Mounting the Grinding and
Polishing Disc

Inserting the Specimen Holder

Programming

14
Abramin
Instruction Manual
Place the grinding and polishing disc on the turntable by inserting the
three legs in the matching holes of the turntable. In order to prevent
the polishing disc from wobbling the contact face of the polishing disc
and the turntable should be clean.
Secure the specimen holder with the pre-levelled specimens (see
chapter 3.) in the quick-coupling (fig. 1.) in such a way that the stud
on the specimen holder engages in the quick-coupling and while the
specimen holder is being pressed up, press the quick-coupling's
plastic flange down with the thumbs. In this way, the specimen holder
moves further up in the coupling. While the specimen holder is still
being pressed up, release the plastic flange so that it jumps back into
place. The quick-coupling now grips the specimen holder stud and by
turning the specimen holder the driving pins on the quick-coupling
will engage the specimen holder so that it will rotate with it. (To
remove the specimen holder, press the quick-coupling's plastic
flange down with the thumbs while the other fingers are ready to
'catch' the specimen holder, which will fall down). Thereafter the
quick-coupling with the specimen holder can be adjusted sideways in
relation to the disc.
When grinding with grinding paper, adjustment shall be effected in
such a way that the grinding paper is used to its full extent.
When grinding, the specimens should move out over the edge. When
polishing, as much of the polishing cloth as possible should be used,
but in such a way that the specimens do not move out over the edge.
With use of matching diameters for the various discs (see chapter 3),
a fixed eccentricity can be used so that adjustment in between each
step is avoided.
Abramin is equipped with 8 program steps into which data such as
time, number of revolutions and cooling medium (water or lubricant)
can be entered. This presents the opportunity to build a specimen
preparation with up to 8 different steps, for example 4 grinding steps
and 4 polishing steps. Often the preparation data in the 4 grinding
steps will be the same and, therefore, the same program step can be
used for all 4 grinding steps.