FANUC M-20iA

FANUC bills the M-20iA as a general-purpose mid arm for handling and welding, and the spec sheet tracks that billing. It carries a 20 kg payload across a 1,811 mm reach on six axes, holding repeatability to 0.03 mm. That balance of speed, reach, and payload lands it in material-handling, machine-tending, and assembly cells.

Arc-welding is one of its core jobs on the plant floor. The arm is rated IP67 wrist & J3 arm / IP54 body (IP55 optional). Teams standing up a weld cell can work through FANUC's arc-welding parameter setup to dial in schedules and motion.

For machine-tending, the M-20iA mounts on the floor, from the ceiling, or at an angle, so the cell can be laid out around the machine it feeds. The I/O handshake between the arm and the equipment follows FANUC's machine-tending guide.

The arm runs on the R-30iB Plus controller. Routine mastering and backups go through references like quick mastering and controlled-start backup, and servo faults such as SRVO-062 have their own page. A controller-battery replacement stays on the preventive-maintenance list.

Reach runs modest for large-part transfer, so long workpieces can outgrow the 1,811 mm work-envelope. On pure pick-and-place cycle time, lighter arms will edge it out, a fair trade given its broader handling and welding range.

Where the M-20iA earns its keep is precision. Holding 0.03 mm repeatability across the full 1,811 mm reach is tight work for a 20 kg mid arm, and that steadiness is what carries it through weld seams and assembly placements shift after shift.