PCC D3400 - Page 101

LOGICPCBA
---- --------I
SERVOPCBA
LINE SYNCHRONIZER
(ZERO CROSSING
DETECTOR)
AC REFERENCE--.J
(LINE FREQUENCY)
RAMP
GENERATOR
SEPARATE SECOINDARY
WINDINGCIN
POWER TRANSFORMER
MOTOR CAPACITORS
------:1:
1
:---- - - ------,
, I POWER LlN_E- __ -I ____ +- ______ ~
SEPARATE DC POWER SUPPLY _
+
VOLTAGE
DRIVE MOTOR
ENABLE (NLDMEG)--it--t-------------- .... of COMPARATOR AND I-+-TI--t-t~
CONTROL GATES I
CURRENT
AMPLIFIER
TRANSISTOR
INTERCONNECTION
WIRING AND CONNECTORS
SPEED CONTROL
COUNTER
DISK SPEED COUNT
PROGRAMMING
FF)-.-f
CFF),--- ......
~---;l
START DRIVE MOTOR (NLSDMGl------t...{'-------,
L
DRIVE MOTOR ENABLE (LDMEG)-----t~'i
SPEED VALUE
FLIP-FLOPS
SPEED SEQUENCE
CONTROL
SPEED STATUS
FLIP-FLOPS
I
I
NLiMSI
CLAMPED I
INTEGRATOR AND I
OUTPUT CONTROL II I
I """" ~
lJ:-_--- ....
BRAKE CYCLE ENABLE (NLBCEGI-
... ---------t~ SPEED OUT OF
- TOLERANCE (LSOTF)
READY (LRXXG)--- .... "I
GATE
DISK SPEED
t-- ...... ERROR (NLSDEG)
OPTO-ISOLA TOR
TRIAC SWITCH
SWITCHES
L
---------------------
MOTOIR CONTROL BOARD PCBA
I
I
__ -----'I
DRIVE MOTOR
I
I
I
L __
Figure 4-10. Spindle Speed Control,
Functional Block Diagram
4-41/4-42