-9-
PIVOT FRAME JIG
Beam Trammel Mode
Remove the entire adjuster assembly and its
associated pivot bar assembly, leaving the
remaining pivot bar assembly in position.
The trammel pivot stud has a point ground at
one end. This point may be used as a fulcrum
on soft timbers or where a high degree of
precision is not required. However, the user
should be aware that it is possible for the point
to leave its indentation during machining, with
adverse effect upon the workpiece. Wherever
possible, the stud should be used in conjunction
with a bored hole, thereby ensuring precision
and workpiece safety and also allowing both
hands free to control the router if necessary. In
such cases, the pointed end of the stud is
screwed into the pivot knob, to avoid accidental
contact by the user. Run two plain nuts loosely
on to the stud, almost to the knob and use one
to lock the knob in position. Screw the assembly
vertically into the central tapped hole in the
remaining pivot bar, with the knob on the same
side as the shoe and fence rod locking knobs.
Keep screwing until the stud protrudes below the
bar by approximately 12mm and use a spanner
to lock the stud to the bar with the remaining nut.
Remove both shoe assemblies from the pivot
bar.
The jig is now in its most elementary beam
trammel mode. This set-up will provide the
maximum machining radius for any given fence
rod length, since both the router and the single
pivot bar may be positioned at the extreme ends
of the rods. This arrangement requires the
router to ride with its base plate in contact with
the top face of the workpiece.
BLOCK
SPACER
WORKPIECE
WORKTOP
AND WASHER
LOCKNUTS
BAR
PIVOT
WORKPIECE
ASSEMBLY
PIVOT STUD
PIVOT BAR
In many cases it will be useful
to lock the stud in position with
a washer and pair of locknuts
beneath the worktop.
Ensure electric cord of router
does not foul the rods of the jig.
Summary of Contents for PFJ/SET/1
Page 1: ...PIVOT FRAME JIG...
