VERITAS Mk.II, Руководство пользователя

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23
Troubleshooting
Sharpening on the Platter
Micro-Bevel and Primary Bevel Not Parallel
This is not necessarily a problem, so long as the end
result is a sharp edge, approximately square to the side.
However, it may be symptomatic of a set-up problem or
damage to one or more of the platters:
a) Set-Up: If the tool shifts during the process, the
orientation of the blade to the turntable will not be
identical at all stages of sharpening. This can happen
if the tool holder bar is touching only one corner of
the blade. The set-up, as shown in
Figure 24 , will
cause the tool to pivot. To prevent movement, secure
the tool as shown in
Figure 25 . The key is to tighten
the nut closest to the tool first until the bar is forced
slightly out of parallel with the tool holder. Then
tighten the other nut until the bar is slightly bent into a
very shallow arc that touches the tool on both corners
as shown. Overtightening the bar will cause another
problem (see
Edge Not Square Across Tool , point e ).
b) Platter Damage: The platters supplied are made to
a very exacting flatness tolerance. However, if, for
some reason, a platter is warped, dented or has a
mushroomed edge from being dropped edge first on a
hard floor, the abrasive applied to that platter will adopt
the same distorted form. At every stage of sharpening,
the abrasive must be rotating in a plane parallel to all
other stages. If this is not the case, the bevels created
by successive abrasive steps will not coincide. This is
less of a problem if the 3mm platter with fine abrasive
applied is not damaged as the final micro-bevel will
make the cutting edge perpendicular to the side of
the blade. Replacement platters are available; see
Appendix B: Optional & Accessory Parts .
Micro-Bevel on the Heel Instead of the Edge
If this happens, the abrasives are applied to the wrong
platters. The two coarse grades, 80x grit and 100µ, must
be on the thick (4mm) platter, and the two fi ne abrasives,
40µ and 9µ, must be on the thin (3mm) platter.
Excessive Heat Build-Up
Since the sharpening system uses a dry grinding action,
it is possible to overheat a blade and reduce its hardness,
thereby eliminating its ability to hold a sharp edge. The
instructions explain how to avoid overheating the blade
by holding it a certain way. This technique, in effect,
uses your fi ngers as sensors. However, understanding
how heat is created will help avoid burnt fi ngertips.
Heat generation is governed by six factors:
a) type of abrasive
b) speed of abrasive media
c) type of material being abraded
d) condition of abrasive
e) feed
pressure
f) grade of abrasive
Chapter 7
Troubleshooting
Figure 25: Correct tool holder set-up.
Figure 24: Incorrect tool holder set-up.
Tool Holder Bar
Pivot Point
Chisel
Tool Holder Bar
Chisel
Contact at
both corners.