Quackenbush 230QGDAB Series Operation & Service Manual Download Page 5

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OPERATING INSTRUCTIONS

If the tool has been shipped recently, been in storage, or
repaired, or disassembled; it should be run (without spindle)
through a "tool crib check" of functions.

EMERGENCY STOP

—Depressing the red emergency stop

button

will stop the tool, except when the rapid advance mode

is being utilized. Releasing the rapid advance lever

will stop

the tool.

RAPID ADVANCE

—Depressing the rapid advance lever

will

advance the cutting tool to the work surface faster than the
regular feed rate and stops advancing forward automatically
until the green drill button

is depressed. Note: When the rapid

advance lever is depressed, the exhaust deflector

will move

forward (toward the head) approximately 3/8" and return to its
original position when the lever is released.

DRILLING

—Press the green drill button

firmly and release

it to start the drilling cycle. The cutter will feed to a predeter-
mined depth, dwell, and then retract. The drill motor will shut
off automatically at the end of the retract stroke. The cutter may
be manually retracted at any time by raising the retract lever

IMPORTANT: The spindle retracts at a much faster rate than
it feeds. Care should be taken to avoid entrapment.

Do not hold the drill button down during the end of the retract
stroke—this prevents "motor stop".

DEPTH ADJUSTMENT:

DEPTH COLLAR

—Has four (4) holes for adjusting depth in

increments of .005". Going from one hole to the next and using
the same slot in the spindle will either increase (clockwise) or
decrease (counterclockwise) the depth by .005". Using the
same hole and rotating the collar 90° will give an adjustment of
.020" and 360° will give an adjustment of .080". Tighten lock
screw after each depth adjustment. Tip of lock screw must go
into a spindle slot. IMPORTANT NOTE: To insure maximum
repeatability, the work surface, fixtures, and depth stop must
be cleared of any chips or foreign material before beginning the
next hole. Always replace the rear spindle guard after making
a depth adjustment.

TOOL CRIB CHECK

With air supply shut off, remove rear spindle guard.

Remove depth stop

(left hand threads).

WARNING: Keep hands and clothing clear of rotating spindle,
turn air supply on and use rapid advance to remove spindle.

Shut off air supply pressure.

Depress 5/16" diameter steel end of throttle piston

. The

throttle piston must spring return quickly when released.

With air supply on, move rapid advance lever

all the way.

Motor runs and spindle feed gear (threaded I.D.) must not
rotate. Spindle drive gear (splined l.D.) rotates. Shear pin
is whole and intact.

Release rapid advance lever

and press green drill button

all the way in. Motor starts. Release drill button

. Motor

continues to run. Both gears (splined and threaded) rotate.

Lift manual retract lever

and release. An audible "snap"

indicates the retract valve 382333 is shifting as desired.
Spindle feed gear (threaded l.D.) stops rotating.

Depress signal valve

with screwdriver and release.

Motor stops and retract valve 382333 must reset (manual
retract lever

should drop). Depress red stop button

slowly. There should be no venting of air as the stop button

is depressed.

The lift arm assembly 382665 must be intact, undamaged,
and in place in the upper block. The lift arm assembly is
factory adjusted (new tool) for little or no play.

10. Press green drill button

and release. Motor starts. Press

stop button

. Motor stops. Do not proceed with test if

steps 1 through 10 indicate malfunction.

11. WARNING: Keep hands and clothing clear of rotating

spindle. Using tool 382593, install spindle (with retract
stop collar

locked in place). The spindle will retract fully

into the head and the motor will stop automatically. The
retract valve 382333 must reset (manual retract lever

should drop) and there should be no venting of air when
the stop button

is depressed.

12. Screw depth stop