Bridgeport Interact 2 - Axis Drive Unit System Description; Control and Axis Drives; Replacement of Axis Drive Unit

SECTION
VI
CONTROL AND AXIS
DRIVES
6.1
AXIS
DRIVE
UNIT
SYSTEM DESCRIPTION
Power to each
feed
motor is provided
by an
S.C.R.
feed
drive unit
situated in the elecuical
cabinet.
The main
power
input
to the feed drive
unit
is
a
180-0-180
volts A.C. supply derived
from
trans-
former
T2 and applied
to terminals
U and V on the drive
card via smoothing chokes LL, L2,
L3
for
X,
Y
,
Z
axis drives
respectively
Each drive
unit
produces
a D.C.
supply
which appears at
terminals C and D.
The
D.C. motor
armature
is connected between
these terminals
and the zero
volt
tapping of. T2. Control
of
the
D.C.
voltage to
the
motor is by
means of
the input
command
voltage
from
the MDI
control
which
is
fed
to the drive unit on terminals
7 and
9
for
each
of the three axes.
Each
motor has
an integral tachometer
whose
signal
is input to the respective drive at terminals
4 and
6
to close
the velocity
feedback
loop.
6.2
REPLACEMENT
OF AXIS DRIVE
UNIT
1. Switch off
and isolate the machine
2. Remove
the old drive unit
after remorring
the
plug-in
terminal
strip
connector, the
push-on
power
cable
connectors and the
screw
down earth cable
connection.
3.
Reverse
the
procedure
to
fit
the
new drive
unit
ensuring
that
all elecuical
connections are
correct to
the circuit diagram.
The new drive
must
now be adjusted
4. Remove
wires
5,
6,7
from
overload
3
in
electrical
panel
5.
Switch
on isolator, press
Points".
[CE]
b,r,.on
on
control unit. Display
will show
"Pass
Over Reference
6.
Enter
figure
95748
and
@
.
control unit
will transfer into
Machine
Paramerer
Mode
Alter parameter
17 to:
0
for
setting
X axis drive
3
for
setting Y
axis drive
5
for
setting Z axis
drive
Press
button
on
control to
change back
to
Pass
Over Reference
Points mode.
7.
Set current
limit on
drive.
Turn
the
feedrate
control
ando/o
override
control
on pendant
fully
clockwise.
Connect a
D.C.
voltmeter
between
test point
5
and ground
on the
drive being
set.
DEL
D
6-r