96-8100
1-15-96
164
TECHNICAL REFERENCE
S E R V I C E M A N U A L
VF-S
ERIES
9. SPINDLE DRIVE ASSEMBLY
The spindle drive is located in the main cabinet on the right side and halfway down. It has a blue cover on it. It operates from
three-phase 200 to 240V AC. It has a 5 H.P. continuous rating, a 7.5 H.P. five-minute rating, and a 9 H.P. one-minute rating.
The spindle drive is protected by CB1 at 30 amps. Never work on the spindle drive until the small red CHARGE light goes
out. Until this light goes out, there are dangerous voltages inside the drive, even when power is shut off.
For all other data on the spindle drive, refer to the supplied documentation for your drive.
10. RESISTOR ASSEMBLY
The Resistor Assembly is located on top of the control cabinet. It contains the servo and spindle drive regen load resistors.
10.1 SPINDLE DRIVE REGEN RESISTOR
A 15-ohm, 900-watt resistor or 20-ohm, 600 watt resistor is used by the spindle drive to dissipate excess power caused by
the regenerative effects of decelerating the spindle motor. If the spindle motor is accelerated and decelerated again in rapid
succession repeatedly, this resistor will get hot. In addition, if the line voltage into the control is above 255V, this resistor
will begin to heat. This resistor is overtemp protected at 100
0
C. At that temperature, an alarm is generated and the control
will begin an automatic shutdown. If the resistor is removed from the circuit, an alarm may subsequently occur because of
an overvoltage condition inside the spindle drive.
10.2 SERVO DRIVE REGEN RESISTOR
A 500-ohm, 100-watt resistor is used by the servo drives to dissipate excess power caused by the regenerative effects of
decelerating the servo motors. If the servo motors are accelerated and decelerated again in rapid succession repeatedly, this
resistor will get hot. In addition, if the line voltage into the control is above 255V, this resistor will begin to heat. This
resistor is overtemp protected at 100
0
C. At that temperature, an automatic control shutdown is begun. If that resistor is
removed from the circuit, an alarm may subsequently occur because of an overvoltage condition for the servo buss.
10.3 OVERHEAT SENSE SWITCH
There is an overtemperature sense switch mounted near the above-mentioned regen resistors. This sensor is a normally-
closed switch that opens at about 100
0
C. It will generate an alarm and all motion will stop. After four minutes of an overheat
condition, an automatic shutdown will occur in the control.
Содержание VF-SERIES
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Страница 221: ...96 8100 1 15 96 218 CABLE LOCATIONS HAAS AUTOMATION INC S E R V I C E M A N U A L VF SERIES CABLE LOCATION DIAGRAM ...
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