HS50_advance_level 2.pdf - 第331页
Stud ent Gu ide HS-5 0 Adva nced II 07/2 002 Ed ition 11 DP-Axis 9 ,QLWLDOL ]H9 DOYH 'ULY HDW'S VW DWLRQ .H\ a Home posi tion dp dri ve away from segm ent s Engaged p osition dp drive at segmen t…
07/2002 Edition Student Guide HS-50 Advanced II
11 DP-Axis
8
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The stepper motor, which acts to swivel out the drive O-ring to engage with the segment sleeve,
is controlled and monitored by the Machine Controller via the CANBUS. When the Star axis is in
position, and the axis ’End Signal’ is sent to the Machine Controller, the Machine Controller gives
the command to swivel out. The stepper motor rotates 90° to engage with the sleeve, the slotted
light barrier monitors this movement and when it is complete the signal is reported back to the Ma-
chine Controller.
The Machine Controller now sends the 'Servo Enable' command to the Axis Controller and as a
result the drive motor will start and rotate the sleeve to the required position. Once the axis card
measures that the position is correct it then gives the 'End Signal' to the Machine Controller. The
command is then sent to the stepper motor to swivel back the drive system that does so by re-
versing 90° back to it's home position. Again when this movement is complete the signal is sent
back to the Machine Controller.
These functions can be tested using the 'Single Funtions' tests in the SITEST program.
½ The Dp swivel motor is controlled by
the machine controller via the
CANBUS.
½ The swivel motor position is detected
by a slotted light barrier which monitor
the disk fitted to the motor shaft.
½ The axis controller is enabled with the
“swiveled in signal”sent to the machine
controller via the CANBUS.
½ The axis controller is disabled with the
“swiveled off signal”sent to the machine
controller via the CANBUS.
½ The position is directly measured on
the sleeve by the encoder looking at the
scale.
Axis
controller
Servo
amplifier
A/B
M
=
G
=
M
∏
Encoder system using scale on rear
of sleeve.
Machine
controller
Swivel Stepper Motor
CANBUS feedback to
MC from Swivel motor.
Student Guide HS-50 Advanced II 07/2002 Edition
11 DP-Axis
9
,QLWLDOL]H9DOYH'ULYHDW'SVWDWLRQ
.H\
a Home position dp drive away from segment
s Engaged position dp drive at segment
The stepper motor of the valve drive is turned to the home position. The stepper motor runs and
the light barrier on the cam disk sets the end signal.
Because of the special shape of the cam disk the stepper motor is able to recognize the home
position.
1.
2.
07/2002 Edition Student Guide HS-50 Advanced II
11 DP-Axis
10
7UDFNVLJQDOV
Track Signal - Dp Axis
Rotor
Scale
(360 ticks / 360
°
of
scale)
A
B
12341234…..
X16
Connection Point for Track
Signal Test Box
of the Analogue
Track Signals A, and B
the
(Multiplication by a factor of 10 for Digital Conversion)
(zero
pulse) sent to Interm. Distributor Board.
3.6 Vpp
X7as
(2) A
(5) B
(8)
(7) +5V
(1) GND
X1as X14ac
(27) A
(26) A not
(24) B
(23) B not
(21) N
(20) N not
X3ac X3aa
(21) A
(20) A not
(18) B
(17) B not
(15) N
(14) N not
X25aa X3tp
(2) A
(3) A not
(5) B
(6) B not
(8) N
(9) N not
.
(Multiplication by factor of 4)
End Result:
(360) x (10) x (4) =
14,400 pulses / 360
°
Therefore ....
1 digit = 0.025°