Bridgeport Interact 2 - Machine Maintenance: Theory of Operation; Axis Drive Systems

SECTION
IV
MACHINE
MAINTENANCE
THEORY OF
OPERATION
+.1
THE XY
SERVO
MOTOR
DRIVE
4.7.7
Servo
Motors
The
feed
motors are
of
the
permanent
magnet
rype
driven
by
silicon
controlled
rectifier
&ive
cards situated in the electrical cabinet.
A
l25linerrevolutiorr
encoder is mounted
on
the
back of each motor
and
provides the
position
feed
back
signal.
4.7.2
Transmission
The X
and
Y motions of the
table
are accomplished
by means
of
hardened
and
preloaded
5 mm
pitch ballscrews
with
recirculating
ball
nuts. On the
X axis the
ball
nut is
fixed
to the
saddle and
the
D.C. motor
turns the screw
through
a2:7
reduction timing
belt
drive.
The
Y
a.xis is
similar,
the drive
being to the
rear of the
screw to
give
operator access
to the work
Ltea.
4.2 KNEE
DRIVE
4.2.7
Raising and
Lowering
Knee
The knee is
elevated by an Acme
screw.
A
friction
type
dual dial,
calibrated
in increments of
.01 mm
(.001")
is provided.
To change
knee
elevation push
the knee
eievating crank in until the clutch meshes, then turn
the
crank
clockwise
to
elevate
the
knee, or
counter-clockwise to
lower it.
NOTE:
Two knee lock leaers wbicb control clamps on tbe knee-column uays must be
released
prior
to raisi.ng and lowering tbe knee.
4.2.2 Clamping the Knee
To
clamp the knee,
turn the knee
lock levels
firmly
upwards. To release, turn them the other
way. Keep the knee clamped
while cutting.
4.3 LUBRICATING SYSTEM
All
moving members are
fed from
a
central lubricating
tank containing
a
filter
and
motorised
timed
plunger
lubricating pump.
Each pump discharges
(5
cc every
30
minutes) metered amount
of
fluid as
follows:
X axis 8 orifices
Y
axis
6
orifices
Z axis
6
orifices
XY and Z axis
ballscrews 1 orifice each
4-r