Vista Sensors and Motors.pdf - 第20页

SENSORS AND MOTORS MOTORS 20.20 Technical Reference Manual Chapter Issue 1 Sep 02 MOTORS Ther e are three types of motor used on the machine as follows: • S tepper Motor • Serv o Mo tor • DC Motor S tepper Motor A steppe…

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SENSORS AND MOTORS
PRESSURE SENSOR
Chapter Issue 1 Sep 02 Technical Reference Manual 20.19
Testing/
Adjustment
For adjustment refer to the Pneumatics Module Chapter.
The sensor may be tested either in circuit or disconnected:
In circuit -
• Monitor the voltage at signal IN 0 whilst increasing the pressure from zero
using the main regulator. As the air pressure exceeds the set point value
the voltage is pulled down to 0V.
Disconnected -
• Measure continuity across the switch whilst increasing the pressure from
zero using the main regulator. As the air pressure exceeds the set point
value the contacts close.
Figure 20-18 Pressure Diagram
Indicated
Pressure
12V
0V
Open
Circuit
Closed
Circuit
Open
Circuit
Set Point
Contact
Continuity
Digital I/P
Signal
5
3
bar
0
SENSORS AND MOTORS
MOTORS
20.20 Technical Reference Manual Chapter Issue 1 Sep 02
MOTORS There are three types of motor used on the machine as follows:
• Stepper Motor
• Servo Motor
• DC Motor
Stepper Motor A stepper motor rotates its shaft by a precise angular amount each time it is
actuated. A stepper motor is used for the following functions:
• Screen Actuators (XF, XR and Y)
• Front and Rear Squeegee
• Moving Rail
NOTE
With the stepper system there is no feedback from the motor to the controller,
therefore should the system encounter excess mechanical friction it simply
stalls.
Figure 20-19 Stepper System Basic Layout
SENSORS AND MOTORS
MOTORS
Chapter Issue 1 Sep 02 Technical Reference Manual 20.21
Figure 20-20 Stepper Schematic
24V Stepper Motors
24V Stepper Motors
Front Squeegee
Rear Squeegee
Rail
Machine Controller
Step/Dir - 4,5,6
Step/
Dir-7
I/O Breakout Boards
Squeegees, Rail, P.Disp - Homes
Mux
Home
Critical Real Time I/Ps
16 I/Ps, O/Ps
per card
XF; XR ; Y Actuators
NOTE
The CAN Bus forms part of the 100 way connection
between the Machine PC and Controller enclosures
Host
Comms
Parallel
Printer
PCI Bus
ISA Bus
Machine PC
P.S.U.
HDD
Keyboard
Touchscreen
Camera
24v (U/S)
PCI 3
Vision
Card
Vision
P. C.
Adaptor
ISA 5
CDROM
FDD
P
r
o
c
e
s
s
o
r
ISA 3
Mouse
Lighting
Monitor
100
Way
ISA 10
N
e
x
t
M
o
v
e
CAN Bus
X13
X12
Multi-
Move
A
B
C
D
E
Home
Home
M
M
X5
X3
Dual
Stepper
X6
X4
Dual
Stepper
X1
M
u
l
t
I
p
l
e
x
e
r
Multi-
Interface
Unit