What causes Haas alarm 1031?

Probe battery is depleted or weak causing intermittent signal transmission to the receiver. Wireless probe receiver unit has loose connection or is not properly seated in the control cabinet. Electrical interference from VFD, servo drives, or nearby equipment disrupting the wireless signal between probe and receiver. Probe itself is damaged internally or the stylus tip connection is worn causing intermittent contact. Receiver antenna cable is damaged, disconnected, or has corroded connections reducing signal strength.

How do I fix Haas alarm 1031?

1. Step 1: Check probe battery voltage using a multimeter, replace if below 1.4V per cell or if battery is over 2 years old 2. Step 2: Verify receiver unit LED indicators show proper signal reception, reseat all connections at receiver and check mounting security 3. Step 3: Run probe diagnostics from Settings menu to verify signal strength reading is adequate during manual probe trigger tests 4. Step 4: Inspect probe stylus and internal components for wear or damage, clean all contact surfaces with electrical contact cleaner 5. Step 5: Check antenna cable routing away from motor cables and spindle drive, verify cable continuity and connection at MOCON board 6. Step 6: Replace receiver unit if signal strength remains poor or replace probe if internal damage is suspected after all connections verified

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Haas Controller

Communication · Intermediate · 15 - 45 minutes

Alarm 1031

Haas Alarm 1031 - Probe Communication Lost

Haas alarm 1031 Probe Signal Lost occurs when the NGC control loses communication with the touch probe system during a probing cycle. This typically indicates a broken probe stylus, loose wiring connection, or probe system malfunction that interrupts the electrical circuit between the probe and the machine control.

HaasCommunicationIntermediate15 - 45 minutes

1031

Haas Alarm 1031 - Probe Communication Lost

Probe Signal Lost

Root Cause Summary

Haas alarm 1031 Probe Signal Lost occurs when the NGC control loses communication with the touch probe system during a probing cycle. This typically indicates a broken probe stylus, loose wiring connection, or probe system malfunction that interrupts the electrical circuit between the probe and the machine control.

Safety

Probe may crash
Ensure the machine is in a safe state before performing any maintenance or repairs. Disable automatic operation and engage the emergency stop.
Disconnect power to the CNC control and probe receiver before performing any electrical troubleshooting or repairs.
Be aware of potential pinch points and moving parts when working around the machine tool.
Wear appropriate personal protective equipment (PPE), such as safety glasses and gloves, when working on the machine.
Probe system may experience failure or crash, potentially leading to equipment malfunction; ensure safe isolation before testing

Causes and Fixes

1
Visual inspection of probe stylus
Remove the probe from the spindle and carefully inspect the stylus for cracks, breaks, or missing components. Check the stylus ball for damage or detachment.
Handle probe carefully - stylus components are precision parts and easily damaged
2
Test probe continuity
Using a multimeter, test continuity between the probe body and stylus tip. Should read near zero ohms when stylus is deflected and open circuit when at rest.
A good probe will show infinite resistance at rest and zero resistance when any part of the stylus is touched
3
Replace stylus assembly
If stylus is damaged, replace with manufacturer-approved replacement. Ensure proper torque specifications and thread locker application per probe manual.
Keep spare stylus assemblies in stock - they are consumable items in production environments

DIY Feasiblehigh confidence

Call a technician if:

·NGC control probe input hardware failure
·Persistent signal issues after component replacement
·Probe system requires factory calibration

Prevention

Monitor probe battery status regularly
Keep probe components clean and free of contamination
Maintain spare stylus assemblies in inventory
Perform regular probe qualification cycles

Common Mistakes

Ignoring probe battery status indicators
Using incorrect replacement stylus components
Failing to clean probe receiver antenna
Not checking probe parameter settings after control updates

Related Alarms

1030 1032 1033

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Always verify with your machine manual or a certified technician before performing service procedures.