WEBSTER CHICAGO 79 - Page 19

WEBSTER
CHICAGO
BULLETIN 79P038
MODEL 79 AND MODEL 80
T - MOTOR CONTROL SWITCH
With the motor control lever in " Stop" posi-
tion, the switch contacts should both be open
1/ 32 " to V p3 ". When the lever is moved to
"Run" position the motor contacts ( Fig. 24)
should be first to close. In " Rewind" position
the recording head contacts ( Fig. 25) should
remain open.
/ OFF POSITIQN_
BOTH CONTACTS
g_pE tt 1/32" TILLI"
KEEP Cr: WIDE SIDE
U - NOISE AT BEGINNING OF EACH
RECORDING SEQUENCE
If the recording head contacts close before
the motor contacts, the noise of making con-
tact and starting will appear on the wire.
Bend the switch contacts ( Illustrations 72, 76)
so that the motor starts before the recording
head is energized.
BOTTOM VIEW
ED- FROM
-, HEAD SIDE
B
SWITCH a COIL
r.
' YELLOW BLACK
RED - BLACK FROM MOTOR
Fig. 23 — MOTOR CONTROL SWITCH — " OFF" POSITION
SET ONTÇT _ Q ,( ATION WILL NOT AFFECT OPERATION QF swiTcji
BE SURE CONTACTS ARE SET SO MOTOR IS RUNNING BEFORE MOTOR
DRIVE SHAFT CONNECTS WITH . DLER WHEEL OR SPOOL CHUCK
BOTTOM VIEW
MOTOR CONTACT MUST CLOSE FIRST
Fig. 24 — MOTOR CONTROL SWITCH — " RUN" POSITION
BOTTOM VIEW
MOTOR CLOSED
Fig. 25— MOTOR CONTROL SWITCH — " REWIND" POSITION
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