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PIVOT FRAME JIG
Mounting the Workpiece
Wherever possible, the safety of the workpiece
should be ensured by fixing to the disc or
worktop by the most positive means allowable.
Double-sided tape Trend Ref. DS/TAPE, may be
used for many applications, particularly where
the surfaces to be joined are flat, smooth and
not porous or dusty.
STUDDING
DISC
SECONDARY
PRIMARY OR
WORKPIECE
DISC
ALLOY
WORKPIECE
BLANK
PROFILE
PROPOSED
BLANK
WORKPIECE
WORKTOP
GLUE FILM
SHIM
Fillets of hot-melt glue, applied with a gun at
convenient places, can be very effective.
Where the central portion of a given workpiece is
that which is finally required (ie. the scrap
material occurs at the edges), the system can be
very useful. The system is best used with ‘glue-
film’, which is essentially hot-melt glue in sheet
form.
considerably reduce the problem.
Where work of the highest accuracy is required,
the clamp guide is strongly recommended. This
is available in three lengths (Trend Refs. CG/24,
CG/36 and CG/50) and furnishes a straight edge
which is both straight and parallel to very close
tolerances. It is used in conjunction with an
extra pivot bar and shoe assembly.
Wherever possible, regardless of operating
mode of the jig, it is advisable to set the depth of
the final cut off the workpiece and operate the jig
from the pivot bars rather than the plunge knobs,
to avoid over-depth cutting due to flexing of the
rods under hand pressure.
In many cases, this will not be possible and
there is consequently some risk of indentation of
the workpiece as the initial plunge is taken
(particularly with profiling cutters). It is possible
to alleviate the problem with an extra
attachment, easily home-made. This comprises
a small block of wood, of appropriate thickness,
clamped to the guide rods with a single
woodscrew, as close to the router as operation
will allow.
BLOCK
SPACER
BLOCK
CLAMPING
Summary of Contents for PFJ/SET/1
Page 1: ...PIVOT FRAME JIG...
