Technical information about functions and their application conditions. Follow the manuals supplied for the actual CNC and machine configuration.
Technical articles
FANUC option functions, backup files, certification messages and application conditions.
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.
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