How-to guides

Procedures you can actually follow

85 step-by-step guides for mastering, backups, safety configuration, maintenance, and troubleshooting on industrial and collaborative robots.

Application setup7

Application setup Calibrating a Vision System Offset for a Robot For integrators establishing the coordinate relationship between a camera and the robot so vision-guided positions translate accurately into robot moves. Advanced · ~90 min · 7 steps

Application setup Configuring Seam Tracking for a FANUC Welding Robot For process engineers adding through-arc or laser seam tracking to a FANUC welding application to compensate for part fit-up variation. Advanced · ~100 min · 8 steps

Application setup Handling Mixed-Case Palletizing with the FANUC Palletizing Instruction Build a pallet from more than one case size on a FANUC R-30iB controller by teaching a separate palletizing pattern per case family and selecting among them with TP program logic. Advanced · ~120 min · 9 steps

Application setup Setting Up a FANUC R-30iB Machine Tending I/O Handshake For integrators wiring and programming the digital I/O handshake between a FANUC robot and a CNC or other process machine for automated load and unload. It covers assigning logical signals to physical points, building conditional WAIT instructions with timeouts, and driving acknowledge outputs, with every wait bounded by a timeout and a fault branch so a stuck signal alarms clearly instead of hanging. Intermediate · ~75 min · 19 steps

Application setup Setting Up Arc Welding Parameters on a Robot For process engineers and welders configuring weld schedules on a robotic arc welding cell, from power source communication to weave and crater fill settings. Intermediate · ~90 min · 8 steps

Application setup Setting Up Conveyor Tracking for a Robot For integrators configuring a robot to track and process parts moving on a conveyor using an encoder-synchronized coordinate frame. Advanced · ~100 min · 8 steps

Application setup Teaching a Palletizing Pattern on a Robot For integrators and technicians programming a repeating pick-and-place pattern to build a pallet using the palletizing instruction, with rows, columns, layers, order, and interval spacing. Intermediate · ~75 min · 9 steps

Backups & recovery15

Backups & recovery Archiving Backups to a Network Location For a technician moving controller backups off the controller onto network-accessible storage. The controller supports FTP client devices and TFTP-based Image Backup, not SMB-style network shares with stored credentials. Intermediate · ~30 min · 7 steps

Backups & recovery Backing Up a FANUC Controller to USB For a technician performing a manual backup to a USB drive from the FANUC File screen. Covers the documented F4 BACKUP items and safe removal. Basic · ~10 min · 6 steps

Backups & recovery Cloning a FANUC Robot Controller For a technician duplicating one FANUC controller's full configuration onto an identical replacement controller or a second robot on the same line, using an image backup and restore through the boot monitor. Advanced · ~60 min · 8 steps

Backups & recovery Comparing FANUC Backup Images For a technician determining what changed between two FANUC controller backups, useful when tracking down an unexplained program edit or configuration drift. Intermediate · ~30 min · 7 steps

Backups & recovery Disaster Recovery Planning for a FANUC Cell (R-30iB) A documented plan that lets a maintenance lead rebuild a FANUC robot cell quickly after a controller failure, fire, or major crash. It pairs an "all of above" file backup with a full controller image for each robot, records the mastering and configuration a fresh controller cannot infer, and stores copies off the controller. The plan is only trustworthy once you have rehearsed a restore and confirmed the cell runs at reduced speed. Intermediate · ~60 min · 19 steps

Backups & recovery Exporting FANUC Teach Pendant Programs For a technician saving individual programs off a FANUC controller, useful for sharing a program between robots or archiving before an edit. Basic · ~10 min · 6 steps

Backups & recovery FANUC Backup Before a Software Update For a technician protecting all FANUC programs, configuration, and mastering data before applying a controller software or firmware update. Intermediate · ~25 min · 7 steps

Backups & recovery FANUC Controlled Start Backup For a technician saving FANUC system files from the File screen while the controller is in Controlled Start, capturing configuration files that are not accessible during normal operation. Advanced · ~25 min · 7 steps

Backups & recovery Full Image Backup on FANUC R-30iB Controllers An image backup captures the complete F-ROM and S-RAM memory of a FANUC R-30iB controller as a set of bootable *.IMG files, so it clones the whole system rather than the individual programs and settings that an "All of above" file backup saves. Use it for a full memory snapshot to recover from a corrupt system, before major software work, or to duplicate a proven setup, since the restore rebuilds the entire controller through the boot monitor. Use the everyday file backup or automatic backup instead when you only need to protect programs and parameters. Advanced · ~30 min · 15 steps

Backups & recovery Memory Device (MD:) Backup on FANUC Controllers For a technician running a File screen F4 BACKUP on a FANUC controller with the device set to MD: (the controller's internal Memory Device) to save controller files. Basic · ~15 min · 6 steps

Backups & recovery Recovering a FANUC R-30iB Controller from a Failed Boot For a technician bringing a FANUC R-30iB or R-30iB Mate controller back online after it hangs or fails during startup, working up from a plain cold start through a controlled-start file restore to a full image restore. It maps the boot mode menus, the file and image restore paths, and the module-size and free-memory limits the manuals set. It closes with the failure signatures that mean the SRAM or a battery is the real cause, not the software. Advanced · ~75 min · 19 steps

Backups & recovery Restoring a FANUC R-30iB Robot Backup For a technician recovering a FANUC R-30iB robot's programs, registers, and system settings from a saved backup after data loss, a controller swap, or corrupted memory. It covers partial file restores from the normal file screen, full system-file restores from controlled start, and a complete image restore from the boot monitor. Restoring system files or an image overwrites current mastering and configuration, so match the backup to the robot first and re-verify calibration before production. Intermediate · ~45 min · 18 steps

Backups & recovery Restoring FANUC Files from MD: (F4 RESTOR) For a technician restoring FANUC controller files from MD: or another storage device using the File screen F4 RESTOR, selecting documented restore categories. Basic · ~15 min · 9 steps

Backups & recovery Scheduled Auto-Backup on FANUC Controllers For a technician configuring a FANUC controller to automatically save backups on a recurring schedule so recent data is never more than a day or shift old. Basic · ~15 min · 7 steps

Backups & recovery Verifying Backup Integrity For a technician confirming a saved backup is actually usable before relying on it, rather than discovering a corrupt file during an emergency restore. Basic · ~15 min · 5 steps

Controller & setup13

Controller & setup Applying FANUC Dual Check Safety (DCS) Changes For a technician applying FANUC DCS parameter changes on the controller using DCS Mode Select, with the actual zone and speed limit definitions handled per the FANUC Dual Check Safety Function Operator's Manual. Advanced · ~45 min · 8 steps

Controller & setup Assigning FANUC UOP/SOP Signals For a technician mapping the FANUC standard user operator panel (UOP) and system operator panel (SOP) signals used to start, stop, and control the robot from a PLC or external panel. Intermediate · ~30 min · 8 steps

Controller & setup Changing the FANUC Controller Date and Time Corrects the clock on a FANUC R-30iB controller so logs, backups, and scheduled tasks carry accurate timestamps. Basic · ~10 min · 7 steps

Controller & setup Configuring a Macro on FANUC Controllers A FANUC macro registers an existing TP program as a single instruction so an operator can trigger it from a teach pendant key, a manual-function menu item, or an I/O signal. This guide covers building the entry on the [6 SETUP, Macro] screen, assigning a device, and running the macro safely. Up to 150 macros can be registered on the controller. Intermediate · ~25 min · 19 steps

Controller & setup Configuring Alarm Severity on FANUC Controllers Shows how to review and adjust how a FANUC R-30iB-class controller responds to specific alarms, including which alarms stop the program and which only post a warning. Intended for technicians checking or changing alarm categorization from the teach pendant. Advanced · ~30 min · 8 steps

Controller & setup Configuring Analog I/O on a FANUC Controller Sets up analog input and output channels on a FANUC R-30iB controller for devices such as pressure sensors, flow valves, and variable-speed tooling. Intermediate · ~25 min · 7 steps

Controller & setup Configuring Controller Network Settings For a technician setting up the controller's basic network identity so it can communicate on the plant network for backups, monitoring, or fieldbus traffic. Intermediate · ~20 min · 7 steps

Controller & setup Configuring Digital I/O on FANUC R-30iB For a technician mapping, commenting, and testing digital inputs and outputs on a FANUC R-30iB or R-30iB Mate controller so sensors, grippers, and interlocks read and drive correctly. Covers physical-to-logical assignment by rack, slot, and start number, polarity and complementary attributes, and safe force and simulate testing from the teach pendant. Includes the cycle-power step that makes a new assignment active and the checks that catch a wrong or missing map. Basic · ~35 min · 19 steps

Controller & setup FANUC Cold Start vs Hot Start (R-30iB) A FANUC controller has four start modes, and in daily operation it powers up with either a hot start or a cold start depending on the Use HOT START setting. A hot start restores the pre-shutdown state (program, cursor, override, and I/O), while a cold start aborts the program, turns outputs off, and resets to a clean known state. This guide explains the difference, how each is selected, and when to force a cold start. Basic · ~20 min · 18 steps

Controller & setup Performing a FANUC Controlled Start For a technician who needs the FANUC controlled start menu to change protected (R0) system variables, read or restore system files, and reach maintenance and memory settings that normal operation locks out. Boot it by holding [PREV] and [NEXT] at power-on and selecting 3 Controlled start, then return to production with a cold start. The simple controlled start system cannot move the robot, so verify FROM space and back up first. Intermediate · ~20 min · 20 steps

Controller & setup Setting FANUC System Variables Safely FANUC system variables store the controller's own settings, so a bad value can destabilize motion, servo behavior, or brake control. This guide walks a technician through identifying a variable, checking its attributes, backing up, editing it on the pendant, and cycling power where required. It also covers common failures: a change that appears ignored, a field that will not edit, and motion that turns unstable after an edit. Advanced · ~25 min · 20 steps

Controller & setup Setting Up Remote Mode on FANUC R-30iB Controllers For a technician configuring a FANUC R-30iB or R-30iB Mate controller so a PLC or line control panel can start, select, and stop programs through the peripheral (UOP) interface. It walks the Remote/Local setup on the System Config screen, the five remote conditions the controller checks, and the CMDENBL handshake that confirms the cell is ready, then closes with checks for when remote start refuses to arm. Intermediate · ~25 min · 18 steps

Controller & setup Verifying a FANUC Software Option Is Installed (R-30iB) For a technician confirming whether a purchased FANUC software option is present and active on an R-30iB controller by reading the software configuration screen. Basic · ~15 min · 5 steps

Maintenance7

Maintenance Cleaning the Controller Fan and Cabinet Interior For maintenance technicians performing the 6-month check on the controller's cooling fan and cabinet interior to prevent overheating faults in dusty production environments. Basic · ~15 min · 6 steps

Maintenance Inspecting a FANUC Robot's Balancer For maintenance technicians performing a scheduled inspection of the balancer on a FANUC robot, listening for abnormal noise and looking for obvious damage before escalating to replacement. Intermediate · ~30 min · 7 steps

Maintenance Replacing a FANUC iPendant Teach Pendant (R-30iB) Swap a damaged or failed FANUC iPendant for a compatible replacement on an R-30iB or R-30iB Mate controller, following the powered-down procedure in the maintenance manual. The job covers matching the pendant specification, detaching and attaching the cable, updating the TP firmware when it lags the controller software, and testing the emergency stop, deadman, and enable switches before the robot moves under power. Basic · ~45 min · 16 steps

Maintenance Replacing FANUC Robot Arm Encoder Batteries For maintenance technicians performing scheduled replacement of the absolute Pulsecoder backup batteries in the FANUC robot base battery box, preventing loss of mastering data. Intermediate · ~30 min · 8 steps

Maintenance Replacing the Backup Battery in a FANUC Controller For maintenance technicians performing routine preventive replacement of the controller memory backup battery before it fails and causes program or data loss. Basic · ~20 min · 7 steps

Maintenance Running a FANUC Brake Check (BRCH) on a Robot Verify axis holding brake torque on a FANUC R-30iB controller using the Brake Check function, which compares measured torque against $BCK_GRP.$BRK_TORQUE and reports pass or fail through BRCH alarm codes. Intermediate · ~30 min · 8 steps

Maintenance Updating Controller Software on a FANUC R-30iB Robot Perform a planned software update on a FANUC R-30iB controller, including the backup and verification steps that prevent data loss. Advanced · ~90 min · 8 steps

Mastering & calibration14

Mastering & calibration Backing Up FANUC Mastering Data On a FANUC controller, mastering data lives in the SYSMAST.SV system file. You back it up from the File screen using F4 BACKUP and choosing the System files item. Keep a current copy so mastering can be restored after a controller or battery fault. Basic · ~15 min · 6 steps

Mastering & calibration FANUC Mastering After Battery Loss (BZAL/BLAL) For a technician recovering a FANUC robot after a BZAL or BLAL condition on the pulsecoder batteries. BLAL means power on and replace the battery soon. BZAL means the position count is lost and the robot must be remastered after clearing $MCR.$SPC_RESET and performing a pulse reset. Intermediate · ~40 min · 8 steps

Mastering & calibration Fixture-Position Mastering on FANUC R-30iB Fixture-position mastering is the FANUC factory method that records the pulse count at a special jig position. FANUC performs it at shipment, so it is usually unnecessary in normal field operation. This guide covers the R-30iB controller-side flow only; jig details are in the model's mechanical manual. Intermediate · ~25 min · 7 steps

Mastering & calibration Mastering After a Collision For a technician restoring accurate positioning after the robot has struck a fixture, part, or other object hard enough to shift its mechanical position. Inspect first, then choose the remastering scope that matches what moved. Advanced · ~60 min · 9 steps

Mastering & calibration Mastering After Motor Replacement For a maintenance technician who has just replaced an axis motor or pulsecoder and needs to restore accurate positioning before returning the robot to production. Single-axis mastering is the typical remaster path for this case. Intermediate · ~45 min · 9 steps

Mastering & calibration Payload and Load Estimation Setup For a technician entering accurate tool and part mass, center of gravity, and inertia data so the robot's motion control and collision detection perform correctly. Intermediate · ~30 min · 7 steps

Mastering & calibration Quick Mastering a FANUC Robot (R-30iB) Restores mastering on a FANUC R-30iB controller using a previously stored quick master reference point, a common fix for SRVO-034 when a valid reference exists. Basic · ~20 min · 7 steps

Mastering & calibration Set Up a User Frame with the Three Point Method on FANUC R-30iB For controls techs and setup engineers defining a user coordinate system on a FANUC R-30iB controller. You'll teach three reference points at the pendant, record them into a user frame, and make that frame active so Cartesian moves reference it. Intermediate · ~30 min · 8 steps

Mastering & calibration Setting the Reference Position on FANUC R-30iB For a technician defining a fixed, safe checkpoint on the FANUC REF POSN screen that outputs a digital signal when the robot reaches it, used to confirm mastering and to signal a safe home to peripheral devices. A reference position is a repeatable pose, usually distant from the machine tool and peripheral equipment, and up to 10 can be defined on the R-30iB. Settings live in SYSVARS.SV and each position can drive its own output plus an optional HOME behavior. Basic · ~20 min · 19 steps

Mastering & calibration Setting Up a Tool Frame on FANUC Controllers For a technician defining a tool coordinate frame on a FANUC controller so programmed motion and speed are correct relative to the tool tip rather than the wrist flange. Covers method choice, touch recording, and activation. Intermediate · ~25 min · 8 steps

Mastering & calibration Single-Axis Mastering a FANUC Robot (R-30iB) Re-establishes the zero reference on a single FANUC R-30iB axis after mastering data is lost, such as following a Pulsecoder or motor change on one joint. Advanced · ~45 min · 17 steps

Mastering & calibration Six-Point TCP Calibration on FANUC Controllers For a technician defining a tool center point and tool orientation on a FANUC controller using the Six Point (XZ) method. Three approach points fix the TCP x,y,z on a common physical point, and three additional points define the tool's orientation axes at different physical locations. Intermediate · ~30 min · 9 steps

Mastering & calibration Troubleshooting FANUC Mastering Alarms For a technician diagnosing why a FANUC robot reports a mastering-lost or pulse-mismatch alarm before deciding which remastering method to use. Intermediate · ~25 min · 9 steps

Mastering & calibration Zero-Position Mastering a FANUC Robot Zero-position mastering aligns each axis to its visual zero-degree position mark using jog feed. It relies on eyeballing the marks, so it is not as accurate as other mastering types. Use it only as an emergency measure when no other mastering method is available. Advanced · ~60 min · 7 steps

Teach pendant programming15

Teach pendant programming Adding a Wait Instruction on a FANUC Teach Pendant Adds timed and conditional WAIT instructions in a FANUC R-30iB TP program to synchronize the robot with external equipment. Basic · ~10 min · 6 steps

Teach pendant programming Calling a Subprogram on FANUC Robots Break repeated FANUC teach pendant logic, such as a pick or place sequence, into its own program and run it with a CALL instruction. Control transfers to the first line of the called program, and END returns control to the line after the CALL. Covers teaching the call, passing arguments, nesting, and the errors seen when arguments or stack size are wrong. Intermediate · ~25 min · 18 steps

Teach pendant programming Creating a New FANUC TP Program For an operator or technician starting a new FANUC teach pendant (TP) program for a task the robot has not performed before. Basic · ~15 min · 6 steps

Teach pendant programming Editing a FANUC TP Program Online Safely (R-30iB) A field procedure for changing a TP program on a FANUC R-30iB robot in or near production, using the teach pendant edit screen, the three-mode switch, and step testing so a small change cannot become an unplanned motion. The controller can run a program the instant you edit it, so the workflow keeps starts blocked and speed limited until you have verified the change. Intermediate · ~30 min · 21 steps

Teach pendant programming Jogging in World vs Joint on FANUC (R-30iB) Choose between joint jog and Cartesian world jog to move a FANUC R-30iB robot predictably while teaching or troubleshooting. Covers the jog type cycle on the COORD key, feed rate override, the jog menu, and what to check when the robot moves the wrong way, stalls near a singularity, or refuses to jog. Basic · ~15 min · 18 steps

Teach pendant programming Running a Program in Test Mode on FANUC (R-30iB) Verify a new or edited FANUC program safely: check logic and I/O with the robot locked, then step line by line, then run a continuous test at low speed before releasing it to production. Follows the R-30iB teach pendant flow from the TEST CYCLE screen through step and continuous execution. Basic · ~30 min · 19 steps

Teach pendant programming Setting Default Speed and Termination on FANUC (R-30iB) Configure the feed rate and positioning path of each motion instruction on a FANUC R-30iB teach pendant so the robot stops precisely where it must and rounds corners where it can. FINE stops the tool at the point, while CNT (0 to 100) blends through it, so tuning defaults, per-line values, and acceleration override trades cycle time against path accuracy. Basic · ~20 min · 19 steps

Teach pendant programming Setting Up an Interrupt Program on FANUC (R-30iB) Configure a FANUC R-30iB condition monitor so the controller watches an input, register, or alarm in the background and calls an action program the instant the condition is met. Build a Cond-subtype condition program with a WHEN rule, bracket the watch region with MONITOR and MONITOR END, and write an action program that carries no motion group. Advanced · ~45 min · 17 steps

Teach pendant programming Teaching Linear vs Joint Motion on FANUC Robots Choose between joint (J) and linear (L) motion when teaching a move instruction on a FANUC robot, matched to the path shape the application needs. Covers the motion format, feed rate units, FINE and CNT positioning, and how singularities force a choice, using the standard motion menu, the [CHOICE] key, and the singular point check. Basic · ~20 min · 17 steps

Teach pendant programming Teaching Positions on the FANUC Teach Pendant Record accurate robot points into a FANUC TP program by jogging to each target and pressing POINT so the current position, motion type, feed rate, and termination are written together. The position stores the active tool and user frame numbers, so set those before you teach. Verify every taught point at reduced speed before you trust it. Basic · ~25 min · 20 steps

Teach pendant programming Using FANUC Position Registers (R-30iB) Position registers (PR) are general-purpose variables that hold full position data (x, y, z, w, p, r), and a FANUC R-30iB controller provides one hundred of them. This guide covers recording, editing, and calculating positions on the DATA Position Reg screen, then referencing them in motion and offset instructions, so one taught point can drive many derived positions. Intermediate · ~35 min · 18 steps

Teach pendant programming Using I/O Instructions in a FANUC TP Program Adds instructions that set outputs and read inputs inside a FANUC R-30iB TP program, covering digital, robot, analog, and group I/O plus conditional WAIT with timeouts. Basic · ~20 min · 19 steps

Teach pendant programming Using Offset Conditions in a FANUC TP Program Shows how to shift a group of taught positions by a stored offset in a FANUC R-30iB program using OFFSET CONDITION, the OFFSET motion option, Offset,PR[], and tool offset forms. Intermediate · ~35 min · 20 steps

Teach pendant programming Using Registers and Math Instructions in a FANUC TP Program Explains how to use the 200 numeric registers on a FANUC R-30iB controller for counting, offsets, and program state, including arithmetic and comparison instructions. Intermediate · ~30 min · 19 steps

Teach pendant programming Using Skip Conditions on FANUC (R-30iB) Use a SKIP CONDITION instruction to declare a signal or value test, then attach a Skip motion modifier so a search move cancels early when the condition is met. This is how you build touch-sensing and part-search moves on a FANUC R-30iB controller, with a branch label handling the case where the condition never triggers. Intermediate · ~25 min · 17 steps

Troubleshooting workflows14

Troubleshooting workflows Clearing a FANUC SRVO Servo Alarm Safely Investigate and clear an SRVO servo alarm on a FANUC R-30iB controller by reading the code, subcode, and group/axis, applying the documented Cause and Remedy, and verifying at reduced speed before returning to production. Intermediate · ~45 min · 17 steps

Troubleshooting workflows Diagnosing a FANUC Brake Slip Fault (SRVO-018) on R-30iB For maintenance technicians investigating a FANUC SRVO-018 Brake abnormal alarm or a BRCH brake check failure that indicates an axis brake is not holding to spec. Advanced · ~50 min · 6 steps

Troubleshooting workflows Diagnosing a FANUC R-30iB Robot That Will Not Calibrate A structured pass through the common reasons a FANUC robot fails mastering or calibration and will not accept a valid reference position. It follows the Master/Cal screen flow, separates encoder and battery faults from fixture and jogging problems, and routes genuine hardware faults to qualified service. Every menu path and value comes from the FANUC mastering procedures in the maintenance and operator manuals. Advanced · ~60 min · 19 steps

Troubleshooting workflows Diagnosing a FANUC Robot That Stalls Mid-Program Work through the common causes when a FANUC R-30iB robot halts partway through a program without a clear alarm, from wait conditions to I/O and sensor faults. Intermediate · ~45 min · 8 steps

Troubleshooting workflows Diagnosing an Axis Overtravel Fault on FANUC R-30iB Mate A structured workflow for tracing an axis overtravel on a FANUC R-30iB Mate robot, separating a program or soft-limit cause from a hardware limit switch, a shifted mechanical stopper, or a wiring fault. It walks the alarm and status screens, the MANUAL OT Release procedure for both calibrated and uncalibrated robots, and the physical checks that keep the fault from returning. Intermediate · ~45 min · 18 steps

Troubleshooting workflows Diagnosing Intermittent Emergency Stop Trips on FANUC R-30iB Mate For maintenance technicians finding the cause of an emergency stop circuit that trips unpredictably on a FANUC R-30iB Mate cell. Read the alarm history to learn which of the six ES sources actually fired, then trace that specific button, chain, or fence circuit rather than guessing. The fix is almost always a loose terminal, a chafed conductor, a vibration-damaged connector, or a blown emergency stop board fuse. Advanced · ~90 min · 18 steps

Troubleshooting workflows Diagnosing Mastering Loss on a FANUC R-30iB Robot Determine why a FANUC R-30iB robot lost its mastering data, correct the underlying cause, and choose the right recovery method before returning to production. Advanced · ~60 min · 18 steps

Troubleshooting workflows Finding the Cause of FANUC Robot Position Drift (R-30iB) When a FANUC robot's taught points no longer land on the part, the cause is usually lost mastering, a dead Pulsecoder backup battery, a moved fixture, or mechanical looseness. This workflow separates an absolute-position (mastering) fault from a physical shift, then routes each to the correct correction on the R-30iB Master/Cal screen so you fix the real cause instead of remastering over a mechanical problem. Advanced · ~60 min · 18 steps

Troubleshooting workflows Recovering a FANUC R-30iB Axis That Hit a Hard Stop For maintenance technicians recovering a FANUC axis after it has driven into a mechanical hard stop or tripped a hardware overtravel limit. It covers securing the cell, releasing the axis with FANUC's documented overtravel procedure, checking for mastering or pulse loss, and confirming no lasting mechanical damage before the cell goes back to production. Advanced · ~75 min · 20 steps

Troubleshooting workflows Tracing the Cause of a FANUC Following-Error Fault A following-error or position-error fault on a FANUC robot means the axis fell too far behind its commanded position, and the controller flags it through the servo delay reading and, when disturbance or current climbs high enough, a collision-detect or overload alarm. This workflow reads the actual position error on the pulse screen, then walks the mechanical, load, program, and electrical causes the servo software reacts to. Advanced · ~60 min · 20 steps

Troubleshooting workflows Troubleshooting a Noisy FANUC Pulsecoder Signal on R-30iB For maintenance technicians tracing intermittent servo alarms back to electrical noise on a FANUC serial Pulsecoder feedback line. It walks from reading the alarm history through connector, shield, and earth checks, a sanctioned connector-off isolation test, and the correct alarm-recovery sequence. The goal is to fix the physical noise source, since these communication faults can also trigger misleading secondary Pulsecoder alarms. Advanced · ~55 min · 18 steps

Troubleshooting workflows Troubleshooting FANUC R-30iB Communication Loss to a PLC For controls technicians on a FANUC R-30iB or R-30iB Mate cell that has lost its fieldbus or Ethernet link to the line PLC and stopped production. Work from the exact fault text down through the physical layer, the I/O assignment, the network settings, and the remote-condition signal chain, then confirm real data tags update before releasing the cell back to automatic. Intermediate · ~60 min · 18 steps

Troubleshooting workflows Troubleshooting FANUC R-30iB Repeatability Degradation Over Time For maintenance and process engineers investigating why a FANUC robot's part-to-part repeatability has gradually worsened. Focus on alarm history, mastering integrity, and mechanical damage rather than invented metrology. Advanced · ~60 min · 9 steps

Troubleshooting workflows Troubleshooting Network Latency on a PROFINET Robot Cell For controls technicians diagnosing slow or inconsistent I/O response on a PROFINET network connecting a robot controller to a PLC and other cell devices. Advanced · ~60 min · 8 steps