Clearance Angle Adjustment - Leica CM1520 Instructions For Use Manual

7
Daily Use of the Instrument
2
1
Fig. 26

7.4.2 Clearance angle adjustment

Note
• The harder the specimen is, the larger the clearance angle must be chosen.
• However: The larger the clearance angle is, the larger the section buckling becomes.
• If the clearance angle is too small, sections that are too thick or too thin can result. Also consider
that the position of the knife edge relative to the specimen can change when the clearance angle is
adjusted. For this reason, always place the specimen above the knife when adjusting the clearance
angle. Otherwise, the specimen could hit the knife while being raised. If necessary, move the
specimen backwards to avoid collisions during further trimming.
• A clearance angle that is too steep or too shallow may lead to suboptimal sectioning results and
could possibly damage the specimen. We generally recommend using higher clearance angles for
harder specimens and relatively lower clearance angles for softer ones.
Adjust the clearance angle if necessary:
1. The clearance angle scale is located on the left side of the blade holder.
2. Release the blade holder by turning the No. 4 Allen screw
Select a clearance angle of 0°. To do so, align the number 0 with the index mark
and tighten the Allen screw (→ "Fig. 27-1"). If the sectioning results are not satisfactory,
increase the clearance angle in 1° increments until you achieve optimum results.
40
3
4
(→ "Fig. 27-1") counterclockwise.
(→ "Fig. 27-2")
Version 2.0, Revision K