Haas VF Series Service Manual

96-8100 1-15-96
160
TECHNICAL REFERENCE
SERVICE MANUAL
VF-SERIES
7.5 KEYBOARD BEEPER
There is a speaker inside the control panel that is used as an audible response to pressing keyboard buttons and as a warning
beeper. The beeper is a one kHz signal that sounds for about 0.1 seconds when any keypad key, CYCLE START, or FEED
HOLD is pressed. The beeper also sounds for longer periods when an auto-shut down is about to occur and when the BEEP
AT M30 setting is selected.
If the beeper is not audible when buttons are pressed, the problem could be in the keypad, keyboard interface PCB or in the
speaker. Check that the problem occurs with more than one button and check that the speaker volume is not turned down.
8. MICROPROCESSOR ASSEMBLY
The microprocessor assembly is in the rear cabinet at the top left position. It contains three large boards. They are:
microprocessor, the keyboard and the MOCON. All three boards of the processor assembly receive power from the low
voltage power supply. The three PCBs are interconnected by a local buss on dual 50-pin connectors. At power-on of the
control, some diagnostic tests are performed on the processor assembly and any problems found will generate alarms 157
or 158. In addition, while the control is operating, it continually tests itself and a self test failure will generate Alarm 152.
8.1 MICROPROCESSOR PCB (68ECO30)
The Microprocessor PCB contains the 68ECO30 processor running at 40 MHz, one 128K EPROM; between 256K and 8MB
of CMOS RAM and betwen 512K and 1MB of FAST STATIC RAM. It also contains a dual serial port, a five year battery to
backup RAM, buffering to the system buss, and eight system status LEDs.
Two ports on this board are used to set the point at which an NMI* is generated during power down and thepoint at which
RESET* is generated during power down.
The eight LEDs are used to diagnose internal processor problems. As the system completes power up testing, the lights are
turned on sequentially to indicate the completion of a step. The lights and meanings are:
+5V +5V logic power supply is present. (Normally On)
If this light does not come on, check the low voltage power supply and check that all
three phases of 230V input power are present.
HALT Processor halted in catastrophic fault. (Normally Off)
If this light comes on, there is a serious problem with the processor PCB. Check that the EPROM is plugged in.
Test the card with the buss connectors off.
POR Power-on-reset complete. (Normally On)
If this light does not come on, there is a serious problem with the processor PCB. Check
that the EPROM is plugged in. Test the card with the buss connectors off.
SIO Serial I/O initialization complete. (Normally On)
If this light does not come on, there is a problem with the serial ports. Disconnect
anything on the external RS-232 and test again.
MSG Power-on serial I/O message output complete. (Normally On)
If this light does not come on, there is a problem with serial I/O or interrupts. Disconnect
anything on the external RS-232 and test again.

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)