CNC Machine Error Codes: Complete Guide
CNC machine alarms are the diagnostic backbone of every production floor. When a Fanuc, Haas, Mazak, Siemens, Okuma, or Mitsubishi control throws a code, it tells you exactly where the fault lives — before you open the electrical cabinet. The trick is knowing whether the alarm points to the control, the drive, the motor, or the machine mechanics.
This hub indexes all 136 CNC error code guides on this site. Use the brand sections below for your specific control, or browse the general CNC troubleshooting guides. For a machine-area workflow, open the CNC equipment troubleshooting hub.
Most CNC alarms fall into one of these categories: servo alarms (axis overtravel, tracking error, encoder loss), spindle alarms (speed deviation, overload, sensor fault), ATC alarms (tool changer position or clamp faults), control alarms (battery, memory, parameter errors), and communication alarms (drive link, I/O link, fieldbus).
Tip: Search your exact alarm number and control brand, for example "Fanuc 401 servo alarm" or "Haas 133 spindle drive fault".
136
Total Guides
8
Control Brands
Common CNC Alarm Categories
| Alarm Type | What It Means | Typical Fix |
|---|---|---|
| Servo alarms | Axis tracking error, overtravel, encoder loss | Check encoder cable, servo drive, mechanical binding |
| Spindle alarms | Spindle speed deviation, overload, sensor fault | Check spindle drive, belt, encoder, motor windings |
| ATC alarms | Tool changer position, clamp/unclamp fault | Check tool change sequence, proximity sensors, hydraulics |
| Control alarms | Battery low, memory error, parameter mismatch | Replace battery, reload parameters, check control board |
Fanuc Error Codes (36 guides)
| Guide | Description | Fix |
|---|---|---|
| Fanuc 0i-MD Alarm Code Reference | Fanuc 0i-MD CNC guide for program, PMC, servo, spindle, overtravel, SRAM, pulse-coder, and emergency-stop alarms. | Fix → |
| Fanuc 30i, 31i, and 32i Alarm Codes | Fanuc 30i/31i/32i guide for I/O link, servo, spindle, SRAM, PMC, battery, encoder, and machine-builder alarm diagnostics. | Fix → |
| Fanuc Alarm 1 Overtravel — Causes & Fix | Fanuc alarm 1 overtravel guide for OT release, jogging off the limit, work offsets, soft limits, limit switches, and safe recovery. | Fix → |
| Fanuc Alarm 10 Servo Alarm — Causes & Fix | Troubleshoot Fanuc alarm 10 on CNC equipment with checks for servo load, spindle drives, parameters, wiring, and when to call a controls tech. | Fix → |
| Fanuc Alarm 2 — Overtravel Plus Causes & Fix | Diagnose Fanuc Alarm 2 - Overtravel Plus Causes & Fix: what triggers the alarm, checks to run, and repair decisions before clearing the machine. | Fix → |
| Fanuc Alarm 3 — Overtravel Minus Hardware Causes & Fix | Diagnose Fanuc Alarm 3 - Overtravel Minus Hardware Causes & Fix: what triggers the alarm, checks to run, and repair decisions before clearing the machine. | Fix → |
| Fanuc Alarm 300 APC Battery Low | Fanuc alarm 300 guide for APC battery low faults, absolute encoder battery replacement, backup timing, home-position risk, and recovery. | Fix → |
| Fanuc Alarm 300 APC Absolute Encoder | Fanuc alarm 300 guide for APC absolute encoder faults, backup batteries, pulse coder initialization, axis zero return, and board diagnosis. | Fix → |
| Fanuc Alarm 360 — APC Alarm Battery Low Causes & Fix | Diagnose Fanuc Alarm 360 - APC Alarm Battery Low Causes & Fix: what triggers the alarm, checks to run, and repair decisions before clearing the machine. | Fix → |
| Fanuc Alarm 4 — Stored Stroke Limit Overtravel | What Fanuc alarm 4 means, why a stored stroke limit overtravel occurs, and how to clear the alarm and recover the axis. | Fix → |
| Fanuc Alarm 400 (SV0400) - Servo Overload Fix Guide | Fanuc alarm 400 SV0400 servo overload explained: amplifier cooling, axis binding, motor load, encoder wiring, and the safe diagnostic steps before reset. | Fix → |
| Fanuc Alarm 401 Servo Axis Overload | Fanuc alarm 401 means a servo axis overload. Check binding, lubrication, cutting load, motor thermistors, servo amp current, and parameter settings. | Fix → |
| Fanuc Alarm 409 — Servo Overload (Z-Axis) | Fanuc Alarm 409 means the servo load on the Z-axis exceeded the allowable threshold. Learn the common causes and how to fix Fanuc 409. | Fix → |
| Fanuc Alarm 411 — Causes & Fix | Diagnose Fanuc Alarm 411 - Causes & Fix: what triggers the alarm, checks to run, and repair decisions before clearing the machine. | Fix → |
| Fanuc Alarm 414 — Servo Axis Following Error Fix | Diagnose Fanuc Alarm 414 - Servo Axis Following Error Fix: what triggers the alarm, checks to run, and repair decisions before clearing the machine. | Fix → |
| Fanuc Alarm 424 — Causes & Fix | Diagnose Fanuc Alarm 424 - Causes & Fix: what triggers the alarm, checks to run, and repair decisions before clearing the machine. | Fix → |
| Fanuc Alarm 435 — Causes & Fix | Troubleshoot Fanuc Alarm 435 on CNC equipment with checks for servo load, spindle drives, parameters, wiring, and when to call a controls tech. | Fix → |
| Fanuc Alarm 436 — Causes & Fix | Troubleshoot Fanuc Alarm 436 on CNC equipment with checks for servo load, spindle drives, parameters, wiring, and when to call a controls tech. | Fix → |
| Fanuc Alarm 437 — Servo Following Error 4th Axis Causes & Fix | Fanuc Alarm 437 - Servo Following Error 4th Axis Causes & Fix: likely causes, checks, and repair decisions before replacing parts. | Fix → |
| Fanuc Alarm 460: Spindle Speed Error — Detailed Troubleshooting | Fanuc Alarm 460 spindle speed error: detailed causes, diagnostic steps, and fix procedures for Fanuc 0i, 16i, 18i, 30i, and 31i CNC systems. | Fix → |
| Fanuc Alarm 460 — Spindle Overload | Fanuc Alarm 460 means spindle overload. Check cutting load, dull tooling, bearings, belts, gearbox drag, drive cooling, and spindle load at idle. | Fix → |
| Fanuc Alarm 5 - Stored Stroke Limit 2 Overtravel | What Fanuc alarm 5 means, why a stored stroke limit 2 overtravel occurs, and how to recover the axis. | Fix → |
| Fanuc Alarm 500 — Causes & Fix | Troubleshoot Fanuc Alarm 500 on CNC equipment with checks for servo load, spindle drives, parameters, wiring, and when to call a controls tech. | Fix → |
| Fanuc Alarm 506 - Servo Following Error Fix | Fanuc alarm 506 guide for servo following errors, axis load, encoder feedback, parameter 1828, drive faults, binding, and mechanical checks. | Fix → |
| Fanuc Alarm 600 — Causes & Fix | Troubleshoot Fanuc Alarm 600 on CNC equipment with checks for servo load, spindle drives, parameters, wiring, and when to call a controls tech. | Fix → |
| Fanuc Alarm 6 Overtravel — Causes & Fix | Troubleshoot Fanuc alarm 6 on CNC equipment with checks for servo load, spindle drives, parameters, wiring, and when to call a controls tech. | Fix → |
| Fanuc Alarm 700 Spindle Overheat — Detailed Fix Guide | Fanuc alarm 700 spindle overheat: detailed causes, spindle cooling checks, thermistor diagnosis, and repair steps for Fanuc-controlled machines. | Fix → |
| Fanuc Alarm 700 — Causes & Fix | What Fanuc CNC alarm 700 means, why the spindle overheats, and how to diagnose and fix it. | Fix → |
| Fanuc Alarm 750 — Causes & Fix | What Fanuc CNC alarm 750 means, why the spindle serial link errors, and how to fix it. | Fix → |
| Fanuc Alarm 90 — Causes & Fix | Fanuc alarm 90 reference-return guide for decel dogs, grid-shift parameters, encoder cables, servo load, axis travel, and safe homing checks. | Fix → |
| Fanuc Alarm 800: APC Alarm — Causes and Fix | Fanuc Alarm 800 APC alarm: absolute pulse coder fault causes, diagnostic steps, and reset procedures for Fanuc 0i, 16i, 18i, 30i, and 31i systems. | Fix → |
| Fanuc CNC Alarm Codes — Complete Reference | Fanuc CNC alarm codes: servo alarms (400–499), overtravel (1–6), APC alarms (300–360), and program errors (PS alarms) with causes and fixes. | Fix → |
| Fanuc M-Series Control Alarm Codes: Complete Guide | Fanuc M-Series CNC control alarm codes and diagnostics. Servo, spindle, PMC, and system alarms with causes and technician-level fixes. | Fix → |
| Fanuc OT Alarm Software Overtravel | Fanuc soft OT alarm guide for software overtravel, axis recovery, stroke-limit parameters, reference return, and repeat overtravel causes. | Fix → |
| Fanuc P/S Alarm Program and Syntax Codes | Fanuc P/S alarm guide for program syntax errors, alarm numbers, faulted blocks, G-code mistakes, macro issues, and safe edit checks. | Fix → |
| Fanuc vs Mazak CNC Controls | Fanuc vs Mazak CNC controls compared for alarm lookup, operator workflow, service access, parts support, and troubleshooting decisions. | Fix → |
Haas Error Codes (39 guides)
| Guide | Description | Fix |
|---|---|---|
| Haas CNC Alarm 101 — Emergency Stop Active Fix | Diagnose Haas CNC Alarm 101 - Emergency Stop Active Fix: what triggers the alarm, checks to run, and repair decisions before clearing the machine. | Fix → |
| Haas Alarm 102 — Servo Drive Fault Fix | Haas Alarm 102 means a servo drive fault has been detected on an axis. This guide covers diagnosis and fixes for the Haas CNC servo fault alarm. | Fix → |
| Haas Alarm 103 Overheating Fault | Haas alarm 103 overheating guide for cabinet fans, filters, coolant condition, spindle bearings, shop heat, duty cycle, and drive protection. | Fix → |
| Haas Alarm 103 - Servo Overload Fix | Haas Alarm 103 means servo overload. Check cutting load, axis drag, way lube, cabinet cooling, motor health, and amplifier temperature. | Fix → |
| Haas Alarm 104 Feed Hold — Causes & Fix | Troubleshoot Haas alarm 104 on CNC equipment with checks for servo load, spindle drives, parameters, wiring, and when to call a controls tech. | Fix → |
| Haas Alarm 105 E-Stop — Causes & Fix | Troubleshoot Haas alarm 105 on CNC equipment with checks for servo load, spindle drives, parameters, wiring, and when to call a controls tech. | Fix → |
| Haas Alarm 106 — Causes & Fix | Troubleshoot Haas alarm 106 servo fault on CNC equipment with checks for servo load, spindle drives, parameters, wiring, and when to call a controls tech. | Fix → |
| Haas Alarm 107 - Servo Motor Overtemp Fix | Haas Alarm 107 means servo motor overtemperature. Let the motor cool, then check overload, thermistor signal, cooling fins, lube, and axis drag. | Fix → |
| Haas Alarm 108 — Causes & Fix | What Haas CNC alarm 108 means, why the spindle drive faults, and how to fix it. | Fix → |
| Haas Alarm 110 — Causes & Fix | What Haas CNC alarm 110 means, why the axis drive faults, and how to diagnose and fix it. | Fix → |
| Haas Alarm 111 — Drive Fault | What Haas CNC alarm 111 means, why a drive fault occurs, and how to diagnose and fix the servo drive system. | Fix → |
| Haas Alarm 112 — Motor Overtemp | What Haas CNC alarm 112 means, why a servo motor overtemperature occurs, and how to diagnose and fix it. | Fix → |
| Haas Alarm 113 - Spindle Encoder Fault | Diagnose Haas Alarm 113 spindle encoder faults: signal checks, cable tests, encoder inspection, and repair decisions before clearing the machine. | Fix → |
| Haas Alarm 114 - Spindle Over Speed Fault | Haas Alarm 114 means spindle speed exceeded the allowed limit. Check programmed RPM, spindle-speed parameters, drive settings, and encoder feedback. | Fix → |
| Haas Alarm 116 — Causes & Fix | Troubleshoot Haas Alarm 116 on CNC equipment with checks for servo load, spindle drives, parameters, wiring, and when to call a controls tech. | Fix → |
| Haas Alarm 115 Spindle Overload — Causes & Fix | Diagnose Haas Alarm 115 Spindle Overload - Causes & Fix: what triggers the alarm, checks to run, and repair decisions before clearing the machine. | Fix → |
| Haas Alarm 117 — Causes & Fix | Troubleshoot Haas Alarm 117 on CNC equipment with checks for servo load, spindle drives, parameters, wiring, and when to call a controls tech. | Fix → |
| Haas Alarm 118 — Spindle Orientation Fault Causes & Fix | Diagnose Haas Alarm 118 - Spindle Orientation Fault Causes & Fix: what triggers the alarm, checks to run, and repair decisions before clearing the machine. | Fix → |
| Haas Alarm 119 — Spindle Not At Speed Causes & Fix | Diagnose Haas Alarm 119 - Spindle Not At Speed Causes & Fix: what triggers the alarm, checks to run, and repair decisions before clearing the machine. | Fix → |
| Haas Alarm 120-129 ATC Fault | Haas alarms 120-129 point to automatic tool changer faults. Check air pressure, carousel motion, proximity switches, tool pockets, and recovery steps. | Fix → |
| Haas Alarm 121 - ATC Arm Fault | Haas Alarm 121 means the automatic tool changer arm failed to complete its motion correctly. Learn the causes and how to fix Haas Alarm 121. | Fix → |
| Haas Alarm 123 - ATC Arm Not Home Fault | Haas Alarm 123 means the tool changer arm is not home. Check the ATC arm position, home proximity switch, shop air pressure, actuator, and debris. | Fix → |
| Haas Alarm 122 — ATC Chain Fault | Haas Alarm 122 means the automatic tool changer chain or carousel failed to index correctly. Learn the causes and how to fix Haas Alarm 122. | Fix → |
| Haas Alarm 124 — Causes & Fix | Troubleshoot Haas Alarm 124 on CNC equipment with checks for servo load, spindle drives, parameters, wiring, and when to call a controls tech. | Fix → |
| Haas Alarm 125 Tool Carousel Fault — Causes & Fix | Diagnose Haas Alarm 125 Tool Carousel Fault - Causes & Fix: what triggers the alarm, checks to run, and repair decisions before clearing the machine. | Fix → |
| Haas Alarm 126 — ATC Door Fault | Haas alarm 126 ATC door fault: what it means, common causes, and how to fix tool changer door problems on Haas mills. | Fix → |
| Haas Alarm 127 — Tool Unclamped Fault | Haas alarm 127 tool unclamped fault: causes, drawbar checks, air pressure requirements, and repair steps for Haas mills. | Fix → |
| Haas Alarm 130: Spindle Speed Error — Causes and Fix | Haas Alarm 130 spindle speed error: detailed causes, diagnostic steps, and repair procedures for Haas VF, ST, EC, and UMC series machines. | Fix → |
| Haas Alarm 128: Tool Change Error - Causes and Fixes | Haas Alarm 128 tool change error causes, reset steps, and repair guidance for VF, TM, and ST series CNC machines. | Fix → |
| Haas Alarm 129: Spindle Orientation Error — Fix Guide | Haas Alarm 129 spindle orientation error: causes, diagnostic steps, and repair procedures for Haas VF, ST, and EC series CNC machines. | Fix → |
| Haas Alarm 131 — E-Stop Chain Fault Fix | Haas Alarm 131 points to an open E-stop chain. Check buttons, door interlocks, safety relays, and wiring without bypassing safety circuits. | Fix → |
| Haas Alarm 132 Servo Amplifier Fault | Haas alarm 132 guide for servo amplifier faults, drive checks, motor windings, cables, axis isolation, and replacement decisions. | Fix → |
| Haas Alarm 134 Spindle Drive Fault — Causes & Fix | Diagnose Haas Alarm 134 Spindle Drive Fault - Causes & Fix: what triggers the alarm, checks to run, and repair decisions before clearing the machine. | Fix → |
| Haas CNC Alarm Codes - VF, ST, Servo, Spindle, ATC | Haas CNC alarm guide for VF and ST machines: 100-series stops, low lube, spindle alarms, servo faults, ATC errors, and reset checks. | Fix → |
| Haas EC-400 Horizontal Machining Center Alarm Codes | Haas EC-400 horizontal machining center alarm codes and diagnostics. Common HMC alarms, causes, and technician-level troubleshooting. | Fix → |
| Haas Next Generation Control Alarm Codes Guide | Haas Next Generation Control alarm-code guide for NGC machines, covering alarm history, axis faults, spindle alarms, tool-changer issues, and reset workflow. | Fix → |
| Haas SL-20 Lathe Common Alarms | Haas SL-20 lathe alarm guide for turret, spindle, servo, overtravel, hydraulic, tool changer, and encoder faults. | Fix → |
| Haas VF-4 Common Alarms | Haas VF-4 alarm guide for spindle, tool changer, axis servo, overtravel, low air, encoder, and drive faults. | Fix → |
| Haas VF-2 Common Alarm Codes | Haas VF-2 alarm guide for spindle faults, tool-changer errors, overtravel alarms, servo load, air pressure, cabinet cooling, and reset checks. | Fix → |
Mazak Error Codes (17 guides)
| Guide | Description | Fix |
|---|---|---|
| Fanuc vs Mazak CNC Controls | Fanuc vs Mazak CNC controls compared for alarm lookup, operator workflow, service access, parts support, and troubleshooting decisions. | Fix → |
| Mazak Alarm 1 Servo Alarm — Causes & Fix | Troubleshoot Mazak alarm 1 on CNC equipment with checks for servo load, spindle drives, parameters, wiring, and when to call a controls tech. | Fix → |
| Mazak Alarm 100 Spindle Alarm — Causes & Fix | What Mazak alarm 100 means, why a spindle alarm occurs, and how to diagnose and fix the spindle drive system. | Fix → |
| Mazak Alarm 200 - Spindle Speed Error | Diagnose Mazak Alarm 200 spindle speed errors: drive faults, belt slip, encoder feedback, spindle brake drag, and parameter checks. | Fix → |
| Mazak Alarm 400 Servo Error — Causes & Fix | Troubleshoot Mazak alarm 400 servo error on CNC equipment with checks for servo load, spindle drives, parameters, wiring, and when to call a controls tech. | Fix → |
| Mazak Alarm 50 Servo — Causes & Fix | What Mazak CNC alarm 50 servo drive fault means, how to diagnose it, and how to fix it. | Fix → |
| Mazak Alarm 500 PC Alarm — Causes & Fix | Troubleshoot Mazak Alarm 500 (PC Alarm) on CNC equipment with checks for servo load, spindle drives, parameters, wiring, and when to call a controls tech. | Fix → |
| Mazak Alarm 600 ATC — Automatic Tool Changer Fault Causes & Fix | Mazak Alarm 600 ATC - Automatic Tool Changer Fault Causes & Fix: likely causes, checks, and repair decisions before replacing parts. | Fix → |
| Mazak Alarm 700 — MPC Alarm | Mazak alarm 700 guide for MPC motion-control faults, related servo alarms, cabinet cooling, board connections, batteries, and hardware calls. | Fix → |
| Mazak Alarm 800 — Tool Magazine Fault | Mazak alarm 800 tool magazine fault: causes, magazine sensor checks, ATC timing issues, and repair steps for Mazak machining centers. | Fix → |
| Mazak Alarm 900 Tool Magazine Index Fault - Causes & Fix | Mazak alarm 900 guide for tool magazine index faults, pocket sensors, drive motors, heavy tools, mechanical interference, and service limits. | Fix → |
| Mazak CNC Alarm Codes — Common Faults and Fixes | Mazak CNC alarm codes: servo alarms (1–99), spindle alarms (100–299), servo axis faults (400–499), ATC faults (600+), and PC alarms (500+) with fixes. | Fix → |
| Mazak CNC Alarm 30 — Servo Alarm Fix | Diagnose Mazak CNC Alarm 30 - Servo Alarm Fix: what triggers the alarm, checks to run, and repair decisions before clearing the machine. | Fix → |
| Mazak CNC Alarm 200 Parameter Fault — Causes & Fix | Mazak alarm 200 guide for parameter faults, power-loss corruption, backup batteries, parameter restores, invalid values, and service calls. | Fix → |
| Mazak Matrix/Matrix 2 Fault Code Guide — Complete Reference | Mazak Matrix and Matrix 2 CNC control fault codes: alarm descriptions, servo, spindle, and system alarms with diagnostic steps and troubleshooting. | Fix → |
| Mazak Integrex Error Codes | Mazak Integrex guide for Mazatrol control alarms, servo faults, spindle trips, hydraulic warnings, ATC faults, and machine protection stops. | Fix → |
| Mazak Nexus Series Error Codes: Complete Guide | Mazak Nexus CNC error codes and alarm diagnostics. Alarm categories, causes, and technician-level troubleshooting for Nexus turning and machining centers. | Fix → |
Siemens Error Codes (11 guides)
| Guide | Description | Fix |
|---|---|---|
| Siemens Sinumerik 828D Alarm Codes | Siemens 828D alarm-code guide for NC, PLC, drive, spindle, axis, tool-change, and channel faults on Sinumerik CNC controls. | Fix → |
| Siemens 840D Alarm 380000 - Drive Enable Fault | Siemens 840D alarm 380000 means drive enable is missing. Check E-stop reset, safety relay status, door interlocks, axis enable, and DRIVE-CLiQ. | Fix → |
| Siemens SINAMICS F30001 Fault - Power Unit Overcurrent | Siemens SINAMICS F30001 fault guide for power-unit overcurrent, motor cable shorts, ground faults, axis jams, ramp settings, and G120/S120/V90 drive checks. | Fix → |
| Siemens SINAMICS S120 Fault F07900 — Motor Overtemperature Fix | Siemens SINAMICS S120 Fault F07900 - Motor Overtemperature Fix: likely causes, checks, and repair decisions before replacing parts. | Fix → |
| Siemens SINAMICS V90 Fault Codes - F30001, F07900, F31101 Fixes | Siemens SINAMICS V90 servo drive fault code guide for F30001 overcurrent, F07900 motor blocked behavior, encoder faults, and common startup alarms. | Fix → |
| Siemens 840D Alarm 25000 - Drive Fault Fix | Siemens 840D alarm 25000 means an S120 drive fault. Check the paired drive code, DRIVE-CLiQ cables, module LEDs, encoder wiring, and DC bus. | Fix → |
| Siemens SINUMERIK Alarm 25000 — Drive Fault Fix | Diagnose Siemens SINUMERIK Alarm 25000 - Drive Fault Fix: what triggers the alarm, checks to run, and repair decisions before clearing the machine. | Fix → |
| Siemens Sinumerik Alarm 25201 — Causes & Fix | What Siemens Sinumerik alarm 25201 means, why drive overcurrent trips, and how to fix it. | Fix → |
| Siemens Sinumerik Alarm 300204 — Causes & Fix | Troubleshoot Siemens Sinumerik 300204 on CNC equipment with checks for servo load, spindle drives, parameters, wiring, and when to call a controls tech. | Fix → |
| Siemens Sinumerik Alarm 380500 — Causes & Fix | Siemens Sinumerik 380500 guide for SINAMICS sub-faults, DRIVE-CLiQ cables, motor modules, encoder feedback, cooling, and fault buffers. | Fix → |
| Siemens Sinumerik Alarm 380600 - Encoder Fault | What Siemens Sinumerik alarm 380600 means, why an encoder fault occurs, and how to diagnose and fix it. | Fix → |
Okuma Error Codes (13 guides)
| Guide | Description | Fix |
|---|---|---|
| Okuma CNC Alarm 1013 — Servo Axis Fault Fix | Diagnose Okuma CNC Alarm 1013 - Servo Axis Fault Fix: what triggers the alarm, checks to run, and repair decisions before clearing the machine. | Fix → |
| Okuma CNC Alarm 1050 - Axis Servo Alarm | Okuma alarm 1050 points to an axis servo alarm. Check the named axis, drive sub-code, binding, encoder cable, drive temperature, and motor insulation. | Fix → |
| Okuma CNC Alarm 1201 — Causes & Fix | Okuma alarm 1201 guide for spindle overload, cutting load, tooling, spindle bearings, drive cooling, overload resets, and service checks. | Fix → |
| Okuma CNC Alarm 1400 - Encoder Error | What Okuma CNC alarm 1400 means, why an encoder error occurs, and how to diagnose and fix the feedback system. | Fix → |
| Okuma CNC Alarm 1600 — Communication Error Causes & Fix | Diagnose Okuma CNC Alarm 1600 - Communication Error Causes & Fix: what triggers the alarm, checks to run, and repair decisions before clearing the machine. | Fix → |
| Okuma CNC Alarm 1800 — Causes & Fix | Troubleshoot Okuma CNC Alarm 1800 on CNC equipment with checks for servo load, spindle drives, parameters, wiring, and when to call a controls tech. | Fix → |
| Okuma CNC Alarm 2000 — Communication Error | Okuma Alarm 2000 means a communication error within the CNC control or between the control and drive system. Learn the causes and how to troubleshoot it. | Fix → |
| Okuma CNC Alarm 2030 - Spindle Drive Fault | Troubleshoot Okuma alarm 2030 on CNC equipment with checks for servo load, spindle drives, parameters, wiring, and when to call a controls tech. | Fix → |
| Okuma CNC Alarm 4000 - Causes & Fix | Troubleshoot Okuma CNC Alarm 4000 on CNC equipment with checks for servo load, spindle drives, parameters, wiring, and when to call a controls tech. | Fix → |
| Okuma Alarm 3000 — Main CPU Error | Okuma CNC alarm 3000 main CPU error: causes, power supply checks, memory issues, and service steps for Okuma controls. | Fix → |
| Okuma LB/LU Lathe Common Alarm Guide — OSP-P300 Series | Okuma LB and LU series CNC lathe common alarms for OSP-P300 and OSP-U100 controls: alarm descriptions, causes, and troubleshooting steps. | Fix → |
| Okuma LB-Series Alarm 1013 — Causes & Fix | Troubleshoot Okuma LB-Series Alarm 1013 on CNC equipment with checks for servo load, spindle drives, parameters, wiring, and when to call a controls tech. | Fix → |
| Okuma MC-V4020 Machining Center Alarm Codes: Complete Guide | Okuma MC-V4020 machining center alarm codes and diagnostics. Alarm categories, causes, and technician-level troubleshooting for Okuma OSP-P controls. | Fix → |
Mitsubishi Error Codes (3 guides)
| Guide | Description | Fix |
|---|---|---|
| Mitsubishi CNC Alarm 500 — Causes & Fix | What Mitsubishi CNC alarm 500 means on M70/M80 series, why servo error occurs, and how to fix it. | Fix → |
| Mitsubishi CNC Alarm Y96 — Causes & Fix | Troubleshoot Mitsubishi CNC Alarm Y96 on CNC equipment with checks for servo load, spindle drives, parameters, wiring, and when to call a controls tech. | Fix → |
| Mitsubishi MR-J4 Servo Alarm Codes | Mitsubishi MR-J4 servo alarm guide for AL.10, AL.16, AL.30, AL.50, overload, encoder, regenerative, voltage, and amplifier faults. | Fix → |
Mori Seiki Error Codes (1 guide)
| Guide | Description | Fix |
|---|---|---|
| Mori Seiki Alarm Codes List: DMG Mori CNC Fault Guide | Mori Seiki alarm codes list for NL, NX, NHX and DMU machines: servo, spindle and ATC faults, battery and fan alarms, backups, and safe reset steps. | Fix → |
Doosan Error Codes (1 guide)
| Guide | Description | Fix |
|---|---|---|
| Doosan CNC Fault Codes - PUMA, LYNX, DNM, DVF | Doosan CNC alarm guide for PUMA, LYNX, DNM, and DVF machines: Fanuc alarms, PMC messages, turret faults, hydraulics, ATC, and spindle checks. | Fix → |
General CNC Guides (16 guides)
| Guide | Description | Fix |
|---|---|---|
| Cincinnati CNC Fault Codes — Complete Troubleshooting Guide | Cincinnati Milacron and Cincinnati Machine fault codes for Maxim, Arrow, and Sabre series. What each code means and how to fix it. | Fix → |
| CNC Alarm Reset Guide: Clear Alarms Safely | CNC alarm reset guide for Haas, Fanuc, Mazak, DMG Mori, and Siemens machines covering overtravel, servo, spindle, ATC, lube, and hydraulic faults. | Fix → |
| CNC Machine Error Codes: Complete Troubleshooting Guide | CNC machine error codes explained across Fanuc, Haas, Mazak, Siemens, Okuma, and Mitsubishi controls with common alarm categories and fix steps. | Fix → |
| DMG Mori DMF Series Fault Codes | DMG Mori DMF guide for spindle, servo, lubrication, hydraulic, ATC, coolant, thermal-control, and Siemens or Heidenhain alarms. | Fix → |
| DMG Mori CNC Fault Codes Guide — CELOS / Siemens 840D | DMG Mori CNC machine fault codes for CELOS and Siemens 840D SL controls: alarm descriptions, servo and spindle faults, and troubleshooting steps. | Fix → |
| Hardinge CNC Fault Codes — Complete Troubleshooting Guide | Hardinge CNC fault codes for Bridgeport, GS-series lathes, and VMC series. What each alarm means and how to fix it. | Fix → |
| Heidenhain TNC Error 399 — Causes & Fix | Troubleshoot Heidenhain TNC Error 399 on CNC equipment with checks for servo load, spindle drives, parameters, wiring, and when to call a controls tech. | Fix → |
| Heidenhain Error Code 399 Servo Error — Causes & Fix | What Heidenhain TNC 640 error code 399 means, why a servo error occurs, and how to diagnose and recover the axis. | Fix → |
| Heidenhain iTNC 530 Error Codes: Complete Guide | Heidenhain iTNC 530 CNC control error codes and diagnostics. Error categories, causes, and technician-level troubleshooting. | Fix → |
| Heidenhain TNC 640 Error Codes | Heidenhain TNC 640 guide for PLC-ready, axis-enable, reference-mark, drive, spindle, encoder, and control-voltage alarms. | Fix → |
| Hurco CNC Fault Codes - WinMax Servo, Spindle, ATC Alarms | Hurco CNC fault codes for WinMax VM, VMX, TM, and TMX machines: servo parameter, spindle drive, ATC door, encoder, coolant, and E-stop alarms. | Fix → |
| Makino CNC Fault Codes | Makino CNC alarm guide for a51/a61, D500, F5, V56, servo and spindle faults, ATC errors, batteries, cabinet fans, and lube sensors. | Fix → |
| NUM CNC Alarm E27 — Servo Error Causes & Fix | Diagnose NUM CNC Alarm E27 - Servo Error Causes & Fix: what triggers the alarm, checks to run, and repair decisions before clearing the machine. | Fix → |
| NUM CNC Alarm E28 - Drive Communication Fault | NUM CNC alarm E28 means the control lost communication with a drive module. Check status LEDs, serial link cables, 24V supply, and failed drive modules. | Fix → |
| Servo Motor Fault Codes Guide | Master reference for servo motor fault codes, drive alarms, and common troubleshooting patterns across Fanuc, Mitsubishi, Siemens, Yaskawa, Delta, and more. | Fix → |
| Yaskawa Sigma-7 SGD7S Alarm Codes List & Troubleshooting | Yaskawa Sigma-7 SGD7S alarm codes list: AL.10, AL.16, AL.20, AL.24 and encoder alarms explained, with cable, regen, cooling and amplifier checks. | Fix → |
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