20
OPERATION MANUAL
Spindle Downfeed Operation
The Feed Trip Adjustment sets the point at which
the quill will reset during Power Feed.
Referring to Fig. 16:
The Manual Fine Feed Handwheel can be removed,
but if not removered care should be taken when
the auto feed is used so as not to make contact
with the wheel while it is turning.
1. Loosen the Locknut (J).
2. Using the Quill Feed Handle (K), advance the
quill to the point where the feed should stop.
3. Engage the Feed Trip Cam Lever (D) by pulling
away from head assembly.
4. Adjust Micrometer Adjusting Nut (I) against
Quill Stop (H).
5. Continue turning the Micrometer Adjusting
Nut (I) until the Feed Trip Cam Lever (D) trips.
6. Tighten the Locknut (J).
7. Ensure the Quill Lock (L) is off by rotating
counter clockwise.
8. Turn the spindle on (A):
FWD rotates the spindle counterclockwise.
REV rotates the spindle clockwise.
9. Select the feed rate with the Variable Speed
Control Handwheel (F).
10. Set the Feed Rate Lever (Fig. 17) to the feed
rate required for the tooling and material
required.
11. Position auto-downfeed direction pin (see “C”
Fig. 16) in center of handwheel for spindle
travel that is correct for your operation.
If necessary, rock fine downfeed handwheel
back-and-forth to move pin all the way in or
out.
12. Select feed direction by setting the Feed
Direction Knob (C) position per the table:
NOTE:
The direction pin has three positions:
1) In for one downfeed direction,
2) middle for neutral or no movement,
3) out for the reverse direction. The direction of
spindle travel for the in and out positions is relative
to the direction of spindle rotation. Keep in mind
that spindle rotation and downfeed direction
will reverse when the spindle speed range is
changed.
Spindle Direction
Feed Direction Knob Position
Clockwise
Down
In
Up
Out
Counter Clockwise
Down
Out
Up
In
13. Engage the Feed Trip Cam Lever (D) by
pulling away from head assembly.
NOTE:
Due to variables in tool diameter, coatings,
coolant, and materials, no specific spindle speed
or feed rate recommendations are provided. Refer
to Fitting and Machining manual ( Hafco Code
L341) or a general shop manual that has data
applicable to the milling and drilling operations
being performed.
Fig. 16
Fig. 17
Page 20
Instructions Manual for BM-23A (M595D)
12/02/2018
