Robotics in Manufacturing
MOTN-198

MOTN-198: Circular Start and Via Points Too Close

A circular move can't be computed reliably because the start point and the via point sit too close together.

What it means

A circular move can't be computed reliably because the start point and the via point sit too close together. When points are bunched up, a small shift in one of them can swing the resulting arc dramatically.

Common causes

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

  1. Circular start and via points taught too close to each other
  2. Uneven spacing of the three circular points, leaving little separation between start and via

How to fix it

  1. Re-teach the circular points so they're spread out along the intended arc.
  2. Space the points as evenly as practical, since tightly clustered points make the arc sensitive to small position changes.

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