18
OPERATION MANUAL
Do not use the quill power
feed at speeds above 2700 R.P.M. It is recommend-
ed to disengage the power feed worm gear when-
ever the power feed is not required. This avoids
unnecessary wear on the worm gear.
Do not move the Quill
Feed Lever unless the motor is at a complete stop.
When changing the lever position, do it gently.
The quill feed lever is located on the right side
of the mill head (Fig. 9). It is used to engage and
disengage the quill power feed mechanism.
The quill feed is engaged by pulling out the knob
and rotating the handle to a new locked posi-
tion. When engaged, the power feed mechanism
will drive the spindle upward or downward. The
power feed mechanism will not drive the spindle
when the handle is in the disengage position.
Feed Clutch Lever
The Feed clutch Lever (A, Fig. 11) is located on the
left side of the head behind the Manual Fine Feed
Handwheel (B, Fig. 11). It engages the overload
clutch on the pinion shaft when positioned to
the left. The Feed Clutch Lever stays engaged
until Quill Stop (C, Fig. 14) comes in contact with
Micrometer Adjusting Nut, forcing it to drop out
automatically, or until the operator releases it
manually by moving the lever to the right.
Fig. 9
Feed Rate Lever
The Feed Rate Lever (Fig. 10) is used to set the
quill feed per-revolution rate. Three feed rates are
available: 0.04mm,-0.08mm, and 0.15mm per rev-
olution. The positions are shown on an indicator
plate under the feed rate lever.
The rate is selected by pulling out the knob on
the feed rate lever and moving the handle to the
detent of the desired feed rate.
NOTE:
The knob is spring loaded – pull out to ro-
tate to new position. Unlike other controls on the
machine, the lever shifts into engagement more
easily with the motor running, and the quill feed
lever engaged
Quill Feed Lever
Fig. 10
Fig. 11
Feed Direction Control
The Feed Direction Control (B. Fig. 12) determines
whether the power feed will move up, down, or
not move at all. The position of the knob depends
upon the direction of spindle rotation (see the
Motor Switch section). The position of the control
may be changed with either the motor stopped
or running. If the control does not engage easily,
move the fine feed handle (A. Fig, 12) back and
forth to aid engagement.
If the spindle is rotating clockwise, the IN position
is downfeed; The OUT position is upfeed. When
the spindle is reversed the feed will also reverse.
The neutral position is between the IN and OUT
position
Page 18
Instructions Manual for BM-23A (M595D)
12/02/2018
