Caution: When you do maintenance or repair on CNC machines and their components, you must always follow basic safety precautions. This decreases the risk of injury and mechanical damage.
Danger: Before beginning any work inside the control cabinet the High Voltage indicator light on the 320V Power Supply / Vector Drive must have been off for at least 5 minutes.
Some service procedures can be dangerous or life-threatening. DO NOT attempt a procedure that you do not fully understand. If you have any doubts about doing a procedure contact your Haas Factory Outlet (HFO) and schedule a service visit.
|Symptom||Probable Cause||Corrective Action|
|Alarms 828-839 AXIS SERIAL DATA COMMUNICATION FAULT
||Encoder signals are affected by noise from high power cables.||Refer to Serial Data Communication Faults / Electrical Noise section below.|
|Cables are not connected correctly or encoder is faulty.||Inspect the cables and connectors. Refer to the Main Processor/Encoder Cable section below. Check the encoder steps/revolution versus and ball screw pitch and verify the encoder counts are accurate per each rotation.
|The FPGA firmware is outdated.||
Go to Diagnostics / System tab, to see the FPGA firmware version. It needs to be version 1.09 or higher.
Note: The firmware must be updated by a Certified Service Technician.
Alarms 161-164, 193, 276 AXIS DRIVE FAULT
Alarm 645 AMPLIFIER GROUND FAULT
|Faulty power cable.||Inspect the cables and connectors. Refer to the Power Cable section below.|
|Faulty servo amplifier.||Check the corresponding amplifier assembly.
Refer to Servo Amplifier - Troubleshooting Guide to troubleshoot the amplifier.
|Faulty servo motor.||Check the corresponding servo motor. Refer to Servo Motor section below.|
|Alarm 103-105, 270, 709 AXIS SERVO ERROR TOO LARGE||Encoder signals are affected by noise from high power cables. Or Faulty encoder.||Refer to Serial Data Communication Faults / Electrical Noise section below. Check the encoder steps/revolution versus and ball screw pitch and verify the encoder counts are accurate per each rotation.
|The axis motor brake, is not disengaging when servos are enabled.||See the Motor Brake section below:|
|The axis ballscrew is damaged.||Check the corresponding axis ballscrew.
Refer to Ballscrew - Troubleshooting Guide to troubleshoot the ballscrew.
|Alarm 103-105, 270, 709 AXIS SERVO ERROR TOO LARGE, after a software upgrade.||The machine parameters are not correct.||
Make sure you have the correct parameters for the type of axis motor.
Alarm 103 - 105 AXIS SERVO ERROR TOO LARGE, during the zero return process. The axis zero returns in the wrong direction.
|The home sensor is being made during the zero return process causing the axis to zero return in the opposite direction.||Check the axis home switch to make sure there are no metal chips on top of the sensor.|
Make sure the cables are connected correctly to the corresponding amplifier. Inspect the connector at the motor. Look for loose connections or contamination.
Look for signs of damage or stiffness on the cable. Disconnect the power cable from the amplifier and motor. Measure the resistance from leg to leg, and from leg to ground. Make sure the measurements result in an open connection. Check each leg from one end of the cable to the corresponding leg on the other end of the cable for continuity. If there is an open connection, there is a problem with the cable.