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Model G0747/G0748 (Mfg. Since 8/12)
Spindle Downfeed
Spindle downfeed movement on the mill is con-
trolled by three mechanisms: 1) The coarse
downfeed lever, 2) the fine downfeed handwheel,
and 3) the auto-downfeed system.
Downfeed Controls
Use Figure 34 and the following descriptions to
become familiar with the spindle downfeed con-
trols.
A. Auto-Downfeed Rate Selector. Selects one
of the three auto-downfeed rates.
B. Fine Downfeed Handwheel. Manually con-
trols slow spindle downfeed.
C. Auto-Downfeed Direction Pin. Starts, stops,
and reverses the auto-downfeed direction.
D. Fine Downfeed Clutch Lever. Engages the
fine/auto-downfeed gears.
E. Downfeed Scale. Used with the quill dog,
shows the depth of spindle downfeed in
inches.
F. Quill Lock Lever. Secures the quill in place
for increased stability during operations.
G. Downfeed Stop & Locking Wheel. Sets
the depth of spindle downfeed. The stop is
threaded into position, then the locking wheel
is used to secure it in place.
H. Coarse Downfeed Lever. Manually controls
quick spindle downfeed.
I. Quill Dog. Moves with the quill and spin-
dle, and disengages the downfeed clutch
lever when it contacts either the top or the
downfeed stop.
J. Downfeed Selector. Sets the mill for manual
downfeed or auto-downfeed control.
When spindle rotation is reversed, either
by changing the spindle speed range or by
using the spindle direction switch, the direc-
tion of spindle auto-downfeed will reverse.
Figure 34. Downfeed controls.
A
I
J
H
G
F
E
D
C
B