Haas VF Series Service Manual

96-8100 1-15-96
166
TECHNICAL REFERENCE
SERVICE MANUAL
VF-SERIES
11.4 POWER PCB (POWER)
The low voltage power distribution and high voltage fuses and circuit breakers are mounted on a circuit board called the
POWER PCB. The following connectors are on it:
P1 Five-pin brings 230V AC three ph from main breaker
P2 On/Off connections to front panel (740)
P3 Coil and aux connections to contactor K1
P4 Auto-off connection to IOPCB (170)
P5 Low voltage control transformer to power K1
P6 230V AC from CB3 to coolant pump (930)
P7 115V AC from CB4 to IOPCB for solenoids (910)
P8 115V AC /T1 (90)
P9 Tool changer fuse circuit from FU5 to IOPCB (840)
P10 +5/+12/Gnd form low volt supply to logic boards (860)
P11 +5/+12/Gnd form low volt supply to logic boards (860)
P12 +5/+12/Gnd form low volt supply to logic boards (860)
P13 +5/+12/Gnd form low volt supply to logic boards (860)
P14 12V AC to operators lamp (800A)
P15 230V AC from contactor K1 for coolant pump (70)
P16 Low voltage power from power supply
P17 +12V DC to IOPCB (860A)
P18 Not used
P19 Connector to op. lamp transformer T4 (290)
P20 115V AC to low voltage supply
P21 -12V DC to processor PCB
P22 -12V DC to MOTIF PCB
P26 +12V DC option connector
P27 +5/+12/Gnd form low volt supply to logic boards (860)
P30 12V AC OP Lamp (800)
P31 +12V (860A)
For older internal transformer with 208/230 taps:
TB1 230V AC from contactor K1
TB2 230V AC to T1 primary
11.5 POWER-UP LOW VOLTAGE CONTROL TRANSFORMER (T5)
The low voltage control transformer, T5, supplies power to the coil of the main contactor K1. It guarantees that the maximum
voltage leaving the Power Supply assembly when power is off is 12V AC to earth ground. It is connected via P5 to the
POWER PCB.
11.6 SECONDARY CIRCUIT BREAKERS
Three more circuit breakers are on the Power supply assembly.
CB2 controls the 115volt power from the main transformer to the servo transformers and, if tripped, will turn off the servo
motors and air solenoids. CB2 could be blown by a severe servo overload.

Haas VF Series Specifications

General

Machine Type	Vertical Machining Center
Control	Haas CNC Control
Z-Axis Travel	20-30 inches (varies by model)
Y-Axis Travel	16 - 30 inches (varies by model)
Spindle Motor	20-30 hp (depending on model)
Tool Capacity	20-40 tools (varies by model)