Vista Sensors and Motors.pdf - 第26页
SENSORS AND MOTORS MOTORS 20.26 Technical Reference Manual Chapter Issue 1 Sep 02 Feedback Position feedback i s provided by an optical increment al encoder which is an integral part of the servo motor . The encoder i s …
SENSORS AND MOTORS
MOTORS
Chapter Issue 1 Sep 02 Technical Reference Manual 20.25
Figure 20-25 Encoder
Channel B
Channel A
Index
Glass Disc
Motor Shaft
5 4 3 2 1
9 8 7 6
1
+5V : Power to Encoder
Output from NextMove
Input to NextMove
Input to NextMove
Input to NextMove
Input to NextMove
Input to NextMove
Input to NextMove
Input to NextMove
Input to NextMove
Index Pulse
SCRN
CHA
GND : 0V Signal
CHB
2
3
4
5
6
7
8
9
Pin No. Signal Name
Type
CHB
INDEX
CHA
Wave Form
*
5V
0V
30mS
30mS
60mS
Example of print
carriage @ 100mm/Sec
*
Channel B
Channel A
Print Carriage
Rising Table, Camera X, Camera Y
90 deg. phase difference
Counts
Encoder Resolution
0
12
3
4
5
7
68
1Pulse=4Counts
1 Rev = 500 Pulses = 2000 Counts
1 Count = 0.18 degrees
1 Pulse
Encoder Resolution
1 Pulse = 4 Counts
1 Rev = 1000 Pulses = 4000 Counts
1 Count = 0.09 degrees
Channel B
Channel A
90 deg. phase difference
Counts
0
12
3
4
5
7
68
1 Pulse
Enlarged View on Arrow A
Renco Encoder
Sensors
A
500 or 1000 pulses
SENSORS AND MOTORS
MOTORS
20.26 Technical Reference Manual Chapter Issue 1 Sep 02
Feedback Position feedback is provided by an optical incremental encoder which is an
integral part of the servo motor.
The encoder is basically a glass disk attached to the motor shaft with a mirrored
finish into which, dependent on type, 500 or 1000 lines have been etched.
Bi-directional motion is sensed via two channels, 90° out of phase. The
NextMove card interprets these channels, quadruplicating resulting in 2000 or
4000 counts per encoder revolution, (Encoder figure refers).
DC Motor A simple moving coil motor is used in the following functions:
• Transport Belts
• USC Paper Feed
Figure 20-26 DC Motor System Basic Layout
Machine PC
NextMove
+/- 24V PWM
MultiMove
Control Enclosure
DC
Motor
SENSORS AND MOTORS
MOTORS
Chapter Issue 1 Sep 02 Technical Reference Manual 20.27
Figure 20-27 DC Motor Schematic
Machine Controller
I/O Breakout Board
C
Transport Belts
USC Paper Feed
NOTE
The CAN Bus forms part of the 100 way connection
between the Machine PC and Controller enclosures
DC Motors
M
16 I/Ps, O/Ps
Multi-
Move
CAN Bus
X12
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
ISA 10
N
e
x
t
m
o
v
e