Haas VF Series Service Manual

96-8100 1-15-96
156
TECHNICAL REFERENCE
SERVICE MANUAL
VF-SERIES
5. INPUT/OUTPUT ASSEMBLY
NOTE: REFER TO THE PCB AND CABLE LOCATION SECTION FOR BOARD DIAGRAMS.
The IOPCB contains a circuit for electronically turning the tool changer power on and off. This prevents any arcing of the tool
changer relays and increases their life tremendously. This includes an adjustable current limit to the tool changer. Poten-
tiometer R45 adjusts the current limit to the tool changer motors. R45 should be set to limit current to between four and six
amps.
The IOPCB also contains a circuit for sensing a ground fault condition of the servo power supply. If more than 0.5 amps is
detected flowing through the grounding connection of the 160V DC buss, a ground fault alarm is generated and the control
will turn off servos and stop.
Relay K6 is for the coolant pump 230V AC It is a plug-in type and is double-pole. Relays K9 through K12 are also plug in
types for controlling the tool changer.
The Input/Output Assembly consists of a single printer circuit board called the IOPCB.
The connectors on the IOPCB are:
P1 16-pin relay drivers from MOCON 1 to 8 (510)
P2 16-pin relay drivers from MOCON 9 to 16 (520)
P3 16-pin relay drivers from MOCON 17 to 24 (M21-M24) (540)
P4 34-pin inputs to MOCON (550)
P5 Servo power on relay 1-1 (110)
P6 230V AC from CB3 (930)
P7 230V AC to coolant pump (940)
P8 Auto-off relay 1-7 (170)
P9 Spindle drive commands (710)
P10 Spindle fan and oil pump 115V AC (300)
P12 115V AC to spindle head solenoids (880A)
P13 Tool changer status inputs (820)
P14 Low TSC(900)
P15 Spindle head status inputs (890)
P16 Emergency stop input (770)
P17 Low Lube input (960)
P18 Over Voltage Input (970)
P19 Low Air Input (950)
P20 Overheat input (830)
P21 Spindle drive status inputs (780)
P22 M-FIN input (100)
P23 Remote Unclamp input (tool release) (190)
P24 Spare 2 (790)
P25 Spare 3 (200)
P26 Spare terminals for M21 to M24
P27 Door lock (1040)
P28 115V AC from CB4 (910)
P29 A-axis brake solenoid output (390)
P30 Tool changer shuttle motor output (810A)
P31 230 VAC for Chip Conveyor (160)
P33 115V AC three-phase input from power supply assembly (90)

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)