Grizzly H8178, Руководство пользователя

Страница: 15 / 28

Model H8178 Power Feed
-13-
28. Using your electric drill, drill one #25 mount-
ing hole 1/2" deep into the table base.
29.
Using a #10-24 bottoming tap, cut threads
into the hole.
30. Secure the limit switch mounting plate to the
table base with one #10-24 x 1/2" flat head
screw.
31. Center punch the other hole and drill, tap,
and install the remaining screw.
32.
Install the limit switch to the mounting plate
with the three previously removed screws.
33. Secure the power and limit switch power
cables away from the path of the moving
table and handwheels.
26.
Install the limit switch mounting plate on the
side of the milling table base so the limit
switch stop pins are horizontally aligned with
the stop pins as shown in
Figure 17.
Also make sure that when mounted, the limit
switch housing has enough of a gap (also
shown in
Figure 17 ) between the gib screw
lock nut so it can be adjusted.
27.
When the mounting plate is properly posi-
tioned, center punch one mounting hole.
Figure 17.
Alignment specifications.
Limit Switch
Housing
Stop
Pin
Gap
Limit Switch
Stop Pin
24.
Install the left and right feed stops into the
table slot shown in
Figure 16 .
Note: You may want to additionally drill and
insert a roll pin to prevent any chance of a
stop block inadvertently moving past the stop
setting. If the stop moves past your maximum
stop setting, the lead screw will run out of
thread and slam the table and power feed to
a hard stop causing possible damage.
Figure 16.
Feed stop and optional pin location.
25.
Using a phillips screwdriver, remove the three
mounting screws that secure the limit switch
to its mounting plate.
Optional Roll Pin Installation
Location at Either End of Table
NOTICE
Make sure to position the left and right
stops so that the table can travel an addi-
tional 10mm before the leadscrew runs out
of thread. The reason for this additional
table travel is that after using the rapid feed
feature, the momentum of the motor arma-
ture keeps rotating leadscrew so the table
moves a few millimeters past your normal
stop location. If the lead screw runs out of
travel before the table naturally slows to a
stop, a damaging hard stop will occur.
Periodically, make sure that you always
have the appropriate table free travel past
the stop setting to prevent damaging hard
stops.