Haas VF Series Service Manual

1-15-96 96-8100
169
TABLE OF CONTENTS
TECHNICAL REFERENCE
SERVICE MANUAL
VF-SERIES
13. FUSES
The servo drive (DRIVER) cards have three fuses on each of the X, Y, Z, and A PCBs (F1, F2, F3). If these fuses are ever
blown, the associated motor will stop. This will only happen if there is a failure of the drive card and the user should never
attempt to replace these fuses.
The POWER PCB contains three ½-amp fuses located at the top right (FU1, FU2, FU3). If the machine is subject to a severe
overvoltage or a lightning strike, these fuses will blow and turn off all of the power. Replace these fuses only with the same
type and ratings. The other two fuses protect the tool changer (FU5) and the operators lamp (FU6).
On the servo drive assembly, there is a printed circuit board (SDIST) containing three one-amp fuses (FU1, FU2, FU3). Two
of these fuses protect the contactor and small transformers. They are never expected to blow. The third fuse protects the
regen load circuit load from shorts.
FUSE NAME TYPE RATING VOLTAGE LOCATION
(amps)
FU1 AGC ½ 250V POWER pcb, upper right
FU2 AGC ½ 250V  
FU3 AGC ½ 250V  
LAMP AGC ½ 250V  lower left
FU1 AGC ½ 250V SDIST pcb, right center
FU2 AGC ½ 250V  
FU3 AGC 5 250V  top center
F1 ABC 20 250V SDRIVER pcbs (X, Y, Z, A)
F2 ABC 20 250V 
F3 ABC 10 250V 
FU1 ABC 5 250V I/O PCB
FU2 ABC 5 250V I/O PCB
FU3 ABC 5 250V I/O PCB
FU4 ABC 5 250V I/O PCB
14. SPARE USER M CODE INTERFACE
The M code interface uses outputs M21-24 and one discrete input circuit. M codes M21 through M24 will activate relays
labled M21-24. These relay contacts are isolated from all other circuits and may switch up to 120V AC at one amp. The
relays are SPDT.
WARNING! POWER CIRCUITS AND INDUCTIVE LOADS MUST HAVE SNUBBER PROTECTION.
The M-FIN circuit is a normally open circuit that is made active by bringing it to ground. The one M-FIN applies to all eight
of the user M codes.
The timing of a user M function must begin with all circuits inactive, that is, all circuits open. The timing is as follows:
The Diagnostic Data display page may be used to observe the state of these signals.
14.1 M FUNCTION RELAYS
The IOPCB contains position for four relays (M21-M24) and all are available to the user. In addition, M21 is already wired
out to P12 at the side of the control cabinet. This is a four-pin DIN connector and includes the M-FIN signal.

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)