GBC MS5 - Manual (Page 35)

35
F.300-B/MS-5 DRILL/JULY 2000
ELECTRICAL SEQUENCE OF OPERATION
NOTE: PLEASE SEE SECTION ON THE HYDRAULIC SEQUENCE OF OPERATION FOR MORE
DETAILS
ELECTRICAL SEQUENCE OF OPERATION
A. Close the main disconnect switch (MD).
B. Press the ON button (START).
C. Press the foot switch (FOOTSWITCH).
ELECTRICAL SCHEMATIC REFERENCES
(Drawing E-2384-1)
While the main disconnect switch MD is closed, power
is brought to transformer T1, provided fuse F1 is con-
ductive. Transformer T1 provides power to the hydrau-
lic motor and spindle motor contactors RL1. The
contactors are open and therefore the motors will not
run. Opening the main disconnect switch MD at any
time cuts power to transformer T1.
When the START switch is closed, the hydraulic motor
and spindle motor relay coil RL1 will energize, provided
interlock switches S1 and S2 are closed. Power is
then supplied to the hydraulic and spindle motors. RL1
remains energized until the STOP switch or any inter-
lock switch is opened.
While the FOOTSWITCH switch is closed, power is
brought to the UP solenoid, which raises the table.
When the table reaches the top, the TAKE UP STOP
switch closes, causing relay coil RL2 to energize. While
RL2 is energized, the UP solenoid becomes de-ener-
gized, which lowers the table. Opening the
FOOTSWITCH switch de-energizes RL2 and the UP
solenoid.