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Fine & Auto-Downfeed Components
there are a number of devices that are used for
fine downfeed and quill auto-downfeed control.
use Figure 37 and the descriptions below to
understand the functions of these devices.
A
i
h
g
F
Figure 37. Fine downfeed and quill auto-
downfeed system components.
A. Auto-Downfeed Rate Selector: selects one
of three auto-downfeed rates.
B. Quill Dog: As it moves with the quill, disen-
gages the auto-downfeed clutch lever to stop
or reverse quill movement.
C. Auto-Downfeed Stop: sets the depth of the
quill.
D. Auto-Downfeed Stop Lock: locks the auto-
downfeed stop in position.
E. Quill Lock: locks the quill in position.
F.
Auto-Downfeed Scale: shows the posi-
tion of the auto-downfeed stop (marked in
inches).
G. Auto-Downfeed Clutch Lever: Engages
the auto-downfeed gearing to move the quill
down.
H. Fine Downfeed Handwheel: Moves the quill
⁄
approximately
1
30
coarse downfeed handle moves it.
I.
Auto-Downfeed Direction Pin: starts (in or
out), stops (middle), or reverses direction of
the quill when in auto-downfeed mode.
g0667X high precision Vs Vertical Mill
B
C
d
E
of the distance that the
Quill Auto-Downfeed
1.
turn the mill OFF and wait for the spindle to
stop.
2.
rotate the quill auto-downfeed selector clock-
wise to the rear EngAgE (auto-downfeed)
position.
3.
Adjust the auto-downfeed stop to the desired
depth, then lock it in place.
Note: The increments marked on the auto-
downfeed stop represent 0.001" of quill move-
ment, with one full revolution equal to 0.010"
of quill movement.
4.
Move the auto-downfeed direction pin to the
center (neutral) position.
Note: The auto-downfeed direction pin has
three positions—in, center, and out. Moving
the pin to the in or out positions will start quill
movement or reverse the direction of the
quill. Move it to the center position to stop the
quill and spindle rotation.
5.
Make sure the auto-downfeed clutch lever
is to the right so that the gearing is disen-
gaged.
6.
turn the mill ON and start spindle rotation.
7.
refer to the chart below for auto-downfeed
rates.
Note: The rates are expressed in inches of
vertical quill movement per revolution of the
spindle.
Selector Marking
h (high)
l (low)
M (Middle)
Figure 38. Auto-downfeed rates.
8.
Move the auto-downfeed rate selector to the
setting that is correct for your operation.
rate
0.006 in./rev.
0.0015 in./rev.
0.003 in./rev.
-31-
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