Robotics in Manufacturing
MOTN-098

MOTN-098: Circle angle too large

The taught points for a circular move define an arc bigger than a half circle, which a single Circular instruction can't produce.

What it means

The taught points for a circular move define an arc bigger than a half circle, which a single Circular instruction can't produce.

Common causes

Ranked by what technicians most often find, most likely first.

  1. The three taught points describe an arc larger than 180 degrees when only a half circle or less is supported by one Circular instruction.
  2. The via point isn't positioned between the start and destination points, so the geometry resolves to more than half a circle.

How to fix it

  1. If you actually need an arc larger than a half circle, split it across two or more Circular instructions.
  2. If you meant an arc smaller than a half circle, reposition the via point so it falls between the start and destination points.
  3. Review the taught points and correct them as needed.

Quick facts

Category
Motion
Affected series
R-30iB; R-30iB Mate; R-30iB Plus; R-30iB Mate Plus
Alarm family
MOTN

Verified against FANUC documentation (B-83284EN-1).Last reviewed: 2026-07-12.Editorial process