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FANUC option references, troubleshooting notes and repair records. Check the applicable model and software version before using any procedure.
FANUC OPTION
Understand option functions, file backups and certification messages through documented model and version boundaries.
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Using 30i/31i/32i-B optional rotary-axis control, distinguish rotation direction from endpoint coordinate. Four commands starting at 350° show how the sign can change the arc travelled without changing the absolute endpoint value.
Read article →Using the 30i/31i/32i-B direction-dependent high-speed position switch, compare range checks with crossing events. Following output state along an outward-and-return path shows why current position alone need not determine the current switch value.
Read article →Using 0i-F Plus flexible synchronization and automatic phase synchronization, calculate startup phase difference from the area between velocity curves. Equal speed does not remove a position offset automatically, and the next-block waiting condition has a specific scope.
Read article →Using 30i/31i/32i-B optional rotary-axis control, distinguish rotation direction from endpoint coordinate. Four commands starting at 350° show how the sign can change the arc travelled without changing the absolute endpoint value.
Read article →Using the 30i/31i/32i-B direction-dependent high-speed position switch, compare range checks with crossing events. Following output state along an outward-and-return path shows why current position alone need not determine the current switch value.
Read article →Using 0i-F Plus flexible synchronization and automatic phase synchronization, calculate startup phase difference from the area between velocity curves. Equal speed does not remove a position offset automatically, and the next-block waiting condition has a specific scope.
Read article →Using the 30i-A high-speed cycle machining rules, distinguish repetitions in each cycle header from repetitions specified by call L. Three original data groups illustrate actual execution counts and time, and why the call line alone does not describe the entire sequence.
Read article →Using the 16i/18i-MB external output commands, distinguish variable precision from printed-field precision. Near-limit deviations and insufficient integer fields show how an apparently normal report can lose information needed for acceptance decisions.
Read article →Compare 30i-A G66 and G66.1 to distinguish calls after motion from argument passing for each NC block. A custom coordinate mapping shows why X and Y addresses alone do not prove that the original endpoint is reached first.
Read article →Using the 15/150-B chopping function, distinguish commanded feedrate from reciprocation frequency. Ideal acceleration models for long and short strokes calculate cycle time, while retaining this edition’s boundary that feed hold does not stop chopping.
Read article →Using the F and K definitions for 0i-F lathe G34, build an ideal lead model based on spindle revolutions. It explains feed-axis acceleration at constant spindle speed and why an increment per revolution is not an increment per millimetre.
Read article →The 30i-A oversize-tool supplement separates shape definitions, tool associations and magazine registration. An empty-pocket counterexample shows that PS5360 does not always mean physical interference has already occurred.
Read article →The 30i/31i/32i-B waiting rules are illustrated with two participating paths. A normal timing table is compared with circular waiting caused by reversing A and B, separating cycle-time differences from unreachable wait points.
Read article →The 16i/18i-MB macro-interrupt rules distinguish M99 restoring the original modes from M99 P retaining interrupt-modified modes. An assumed common start shows why the return destination and inherited coordinate/feed state need separate review.
Read article →Within the 0i-F Plus straightness-compensation scope, an original cumulative correction curve compares a constant zero offset, interval interpolation and incremental changes. The analytical curve is kept separate from raw controller compensation data.
Read article →The 30i-A line-to-arc jerk-control rules distinguish continuous velocity direction, an acceleration jump and jerk. A tangent path may still require deceleration, and acceleration-change units must not be confused with jerk units.
Read article →An original gravity-and-friction force table illustrates the four motion states in 30i-A optimum torque acceleration/deceleration. Travel direction, acceleration direction and driving-force direction are not interchangeable.
Read article →The 15/150-B simple synchronous control definition separates common lag from relative position error. Three position examples show that identical commands, individual following errors and mechanical synchronization accuracy require different assessments.
Read article →The 16i/18i/20i/21i-A rules use the greater of fixed and percentage-based speed tolerances. Reaching speed and timing out are separate detection-start events, explaining why the same deviation can produce different outcomes.
Read article →The 0i-F Plus electronic gearbox definition separates mechanical speed ratio from feedback-pulse conversion. An original example with different detection resolutions shows why a tooth-count ratio alone cannot be entered as the synchronization coefficient.
Read article →An original semicircle in an inclined plane explains three-point orientation for 30i-B three-dimensional arcs. The intermediate point need not be at half the arc length, and the second incremental block is measured from that point.
Read article →The 16i/18i-MA exponential-interpolation relationship gives different rotary increments over equal axial intervals. Its formula constant is distinguished from the segment length at address K, and a linear approximation exposes angular interpolation error.
Read article →An original sinusoidal model based on the 2018 single-axis servo learning oscillation specification compares integer and half-integer frequency multipliers. Peak-to-peak displacement, inter-revolution path spacing and actual chip breaking are distinguished.
Read article →Using 30i-B involute interpolation, an original derivation separates base-circle radius, distance from the center and local curvature radius. Acceleration calculations at three positions explain why speed limits become more restrictive near the base circle.
Read article →Commanded position, actual position and following error are separated for 30i-A torque limit skip. Two ideal records of the same contact point show why a recorded position difference cannot directly establish a change in workpiece dimensions.
Read article →An assumed 100-millisecond execution window compares ZONCE, ZEDGE and an initially true condition under 30i-A real-time macro rules. One-shot waiting lifetime and detection of short pulses are separate issues.
Read article →The angular-axis transformation in the 16i/18i/20i/21i-A connection manual is used to calculate travel and speed for a 30-degree mechanism. Program-space feed cannot simply be treated as actual feed-axis speed.
Read article →The 15i-MB G06.2 format distinguishes order, weight and knot. An original rational quadratic example with three control points shows how R changes the path and why control points need not lie on the curve.
Read article →The 30i-B Nano Smoothing mechanism infers curves from line segments. Original chord-height and independent error-budget examples distinguish surface smoothness from CAD geometric accuracy, including the limits of diagnosis 5000 and single-block stopping points.
Read article →Original 30i-A definitions explain partial-turn counting in variable-radius spiral and conical interpolation. An original 2.25-turn example with L3 checks radius and height without interpreting the integer L as a count of complete revolutions.
Read article →Within same-generation T-series two-path superimposed control, signed-speed and increment examples separate the two contributions to slave-axis motion. Combined speed limits, block-boundary switching and ordinary synchronization protection are treated distinctly.
Read article →Original 30i-A G54.4 rules relate COMMON and individual setting errors to the table pose during measurement. An original planar counterexample shows the direction error caused by mixing references and distinguishes this operation from adding a common workpiece zero offset.
Read article →Within the 0i-F G68.2 P1 RPY format, original Q123 and Q321 vector calculations demonstrate noncommutative spatial rotations. The article shows how to check a postprocessor’s matrices, feature normal and in-plane directions.
Read article →The 0i-F polygon-turning model separates side count from flatness. Original ellipse-semiaxis and tangent-deviation calculations explain the limits of approximately straight sides, without equating a hexagonal outline with exact planar surfaces.
Read article →The 30i-B continuous-circle groove-cutting rules relate groove advance to pitch per revolution. Two tool diameters and circular-acceleration limits show why commanded F cannot be equated directly with progress along the groove.
Read article →The 0i-F lathe manual’s G32 multi-start threading rules relate a three-start thread’s lead to its 120° phases and integer Q values. The article separates first-block rules for continuous threading from independent cuts and explains why ordinary G76 Q is not a phase angle.
Read article →The 16i/18i-MB dynamic fixture offset definition supports a planar single-table model. Calculating an eccentric workpiece origin at 90° explains how a correct reference-angle setup can still produce position error after the table rotates.
Read article →Official FANUC 30i/31i-A5 material distinguishes TCP, Tool Posture Control and Smooth TCP. Geometry of a reference point on the tool axis shows how angular differences grow with distance, without equating the tool-tip path with the path of the entire tool.
Read article →For 30i/31i/32i-B machining centers with a nonzero fixed denominator, original, doubled and normalized IJK values give different compensation displacements despite identical direction. The article also checks zero components, activation mode and vector retention during arcs.
Read article →The G10 parameter-input modes differ explicitly between 0i-C and 0i-D. Using the original 0i-D common manual and generation-differences appendix, this article explains the data meanings of L, N and R and an offline review method for older maintenance programs.
Read article →The 0i-F parameter manual separates shared external workpiece offset from individual coordinate offsets. A translation model and three-station example distinguish common shifts from a single-station error without treating measurements alone as proof of the cause.
Read article →The 16i/18i-MB macro rules distinguish undefined variables, numeric zero, direct assignment and arithmetic conversion. An original position example and condition table show why omission must be detected before calculation, rather than using a nonzero test for argument presence.
Read article →The 0i-F machining-center figure-copying rules explain why the nth transformation uses n−1. Original linear and three-way rotational arrays calculate first and last positions, with the first subprogram block and inter-contour connections treated as separate constraints.
Read article →The 16i/18i-MB manual distinguishes one-block exact stop, modal exact stop and continuous cutting. An independent acceleration/deceleration model quantifies repeated stopping, while explaining why an in-position range does not mean zero contour error.
Read article →The 0i-D program-restart chapter distinguishes N sequence numbers from the executed block count, including pure macro statements and the FEED HOLD / RESET display boundary. An original table shows why copying a number is not enough to restart.
Read article →The dedicated 0i-D manual intervention and return function distinguishes return to an interruption point from replaying a manual path backward. Original geometry shows different swept regions with identical endpoints, alongside reset cancellation and distance-to-go limits.
Read article →The 0i-D system-variable chapter distinguishes the preceding-block modal state at the look-ahead processing position from the executing block. An original timeline explains differing #4001 and #4201 values without treating program-state reads as motion-complete signals.
Read article →The 0i-D polar endpoint definition and an original chord calculation show why G16 does not turn G01 into an arc. A comparison with Cartesian input and rotary-axis conversion in 0i-F lathe G12.1 distinguishes the two polar functions.
Read article →The 0i-F machining-center normal direction control chapter relates C-axis angular travel to arc length and speed. Distinguishing corner orientation from continuous arc following explains small-radius feed limits and configuration prerequisites.
Read article →An intermediate stop in 0i-F single-direction positioning explains how G60 preserves the final approach direction. One-axis calculations show additional travel, why an endpoint bounding box misses overrun, and the difference between one-shot and modal configuration.
Read article →The 0i-D optional chamfering and corner R chapter distinguishes chamfer setback, connecting-arc radius and an arc command’s own R. Original geometry for 90° and 60° corners tests whether a short edge can accommodate the specified fillet.
Read article →Using the 0i-D machining-center manual, calculations around a nonzero scaling center and an internal circular contour distinguish workpiece geometry, tool compensation and peck depth. Enlarging dimensions does not mean multiplying every value by two.
Read article →The 0i-D machining-center manual explains how 11600#5 AX1 handles omitted axes after rotation. An original 90-degree example compares endpoints for a Y-only command and an explicit XY command.
Read article →Using the 0i-F descriptions manual, point coordinates and signed triangle area explain single- and dual-axis mirroring. Geometric reflection, arc-direction handling and physical spindle rotation remain distinct to avoid reversing the program twice.
Read article →The cutter compensation C chapter of the 16i/18i-MB manual distinguishes geometric inaccessibility, compensation data and path-reversal checks. An internal-fillet example explains why reducing the offset value is not a valid way to clear an alarm.
Read article →A motion-free variable trace based on the 0i-D common operator’s manual compares G65 with M98. It explains argument A mapping to #1, restoration of local-variable levels, and why common variables are not isolated by those levels.
Read article →For a G01 linear model on a 0i-F machining center, inverse-time feed formulas calculate time and speed before and after segmentation. The article distinguishes G93 F from feed per minute and recalculates F to preserve ideal speed.
Read article →The 0i-D manual distinguishes the cylinder radius, rotary-axis angle and developed-surface arc radius in G07.1. An arc-length calculation explains dimensional errors, followed by key restrictions on mode transitions.
Read article →The original 15i/150i-MB manual distinguishes circular tangential feed from spatial-path feed. Calculations for the same hypothetical geometry show the two velocity components and why HTG semantics must be checked.
Read article →The 30i/31i/32i-B descriptions manual distinguishes life-management groups, physical tools and offset data. A remaining-life calculation separates advance warning from end of life and helps investigate dimensional changes after a replacement tool takes over.
Read article →The FANUC function catalog distinguishes built-in CNC checking from a PC/FOCAS2 implementation. The article identifies validation priorities for geometry, tool data and communications, including the impact of fixture changes.
Read article →Coordinate calculations for a four-station fixture distinguish origin translation, workpiece orientation and program selection errors. The Plus catalog defines the scope of the 48 additional coordinate systems. These are geometric checks, not a machine-ready program.
Read article →Signal paths and delay-distance calculations explain High-Speed Skip, distinguish it from Continuous High-Speed Skip, and provide a layered approach to validating measurement errors.
Read article →The 0i-D machining-center manual explains tapping synchronization and feed semantics. Calculations relate thread lead to the two feed modes, with boundaries for overrides, rigid-mode entry and interruption recovery.
Read article →The 0i-TF manual explains speed constraints near the center during polar coordinate interpolation. Calculations illustrate their scale, alongside restrictions on G12.1/G13.1, compensation state and coordinate-system changes.
Read article →Which repetitive machining tasks suit macros? This article covers inputs, variable management and validation records, using a part-family example to organize requirements without copying programs blindly or assuming universal variable ranges.
Read article →High-speed contour machining cannot be assessed by look-ahead block count alone. Drawing on official AICC and Fine Surface descriptions, this article shows how to organize toolpath information, machining objectives and comparative tests while distinguishing function support from actual results.
Read article →TCP coordinates the intended toolpath with the movement of individual machine axes. For systems configured with the function, this article explains how the program, machine kinematics, tool data and postprocessor must correspond, and highlights common selection mistakes.
Read article →Tilted Working Plane helps organize programs around inclined machining faces. Using a hypothetical angled-hole scenario, this article explains the relationships among TWP, machine orientation and workholding datums, and lists the information to check before 3+2 machining.
Read article →If a large program will not fit in the CNC, identify whether the issue concerns storage, transfer or execution. Based on official Data Server material, this article explains file-flow and selection checks, distinguishing a network connection or external storage from actual program-operation capability.
Read article →More storage does not solve every program-saving or editing problem. This article distinguishes program space, registered program count, background editing and extended editing, and explains how to organize requirements and check the current configuration.
Read article →OPRM_INF.000 stores FANUC option information and should be retained with SRAM data and user files. Using a specified 0i-F manual edition, this article outlines backup steps and distinguishes unauthorized restoration from restoration during properly planned maintenance.
Read article →FANUC 5523 indicates that option certification is pending; 5524 indicates that the waiting period has expired. Clearing an alarm with RESET does not complete certification. This article explains the time limit, certification after file restoration and the information to prepare, using specified manufacturer manual editions.
Read article →Checks before importing CNCOPSET.TXT and the documented procedure for certain series, with an explanation of certification expiry alarm 5524 and how to assess 5527 and subsequent actions against the complete message and software version.
Read article →An overview of ten groups of FANUC functions, from program capacity and macros to high-speed contour control, multi-axis machining and assisted programming, explaining standard versus optional functions and the information needed to check model, software version and machine configuration.
Read article →A shared alarm number or feature name does not establish identical behavior across CNC series. Keep the full message, model and software revision together when comparing references.
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