Grizzly Wood Copy Attachment G2891 - Manual (Page 17)

G2891 Lathe Copy Attachment -15-
basic operation
master Spindle or template
Stylus
move from high points towards
areas with greater depth of cut
figure 12. Recommended direction of stylus travel.
To make a copy of an existing spindle or
template:
1. To make identical copies from a master
spindle it is necessary to first make certain
the cutting tool and the follower stylus are
aligned with their respective centerlines.
See figure 13. This can be done most eas-
ily by mounting turning squares with identi-
cal dimensions on the lathe centers and
on the Copy Attachment centers. Move the
follower stylus so it just touches the square.
Adjust the cutting tool in or out of the holder
so it also just touches the square. Remove
the turning squares.
2. Mount the workpiece between the lathe
centers.
3. Move the carriage with the longitudinal
handwheel until the tip of the cutter is pre-
cisely located at the point on the workpiece
where you want the turning action to begin.
See figure 12.
Lathe Centerline
Copy attachment
Centerline
Cutting tool
follower Stylus
figure 13. Stylus/Cutting Tool alignment.
4. If you are using a template, spread the tem-
plate-mounting brackets apart to accommo-
date the template. Note that you will have
to drill holes in your template to mount it
to the template mounting brackets. Locate
the position of the template on the Copy
Attachment main body so the profile will
line up with the desired location of the pro-
file on the workpiece. If you followed Step
2, the stylus should line up at the starting
point of the template.
5. Adjust the crosswheel until the stylus comes
in contact with the template in its desired
position.
6. If duplicating an existing spindle, mount
the spindle between the master spindle
carriers. First position and lock the head
center so the existing spindle profile will
line up with the intended profile area on the
copy. Use a 13mm wrench to loosen and
tightening the mounting fasteners. Slide the
tail center so it is just outside of the master
spindle, and lock in place. hold the master
spindle in position and tighten the hand
knob located on the tail center.
make sure that the workpiece is firmly seat-
ed between centers. If it becomes unseated
from the lathe at operating speed, the work-
piece will be propelled from the machine.
Serious personal injury will occur to anyone
in the path of the workpiece.