Which robot is better for this application?

Yaskawa Motoman PL320 is the stronger starting point for 320 kg palletizing within the named 3159 mm envelope and 4-axis architecture, while FANUC M-410iC/500 is worth shortlisting for 500 kg palletizing within the named 3143 mm envelope and 4-axis architecture. The final choice depends on the real loaded path, required protection, controls and acceptance results. Neither a higher payload nor a longer reach establishes a universal winner.

What payload should I use for the comparison?

Use 320 kg for the specified Yaskawa Motoman PL320 example and 500 kg for FANUC M-410iC/500, subject to all documented load and orientation conditions. Include the tool, adapters, sensors and carried part. Four arm axes position and rotate a level load; they do not provide arbitrary pitch and roll. Validate complete gripper inertia, load retention and the full pallet pattern.

Does the stated reach guarantee access to my fixture?

No. The comparison gives 3159 mm for Yaskawa Motoman PL320 and 3143 mm for FANUC M-410iC/500 using the stated model references. Joint limits, reach reference points, wrist orientation, tool length and collisions determine whether the actual fixture is accessible. Simulate the full approach and exit path.

Can I use the best specifications from every family variant?

No. Keep each named model and revision intact. A different arm length, controller generation or protection option can change the relevant specification. Do not combine one version’s maximum payload with another version’s maximum reach.

Is repeatability the same as finished-part accuracy?

No. The stated values are ±0.05 mm for Yaskawa Motoman PL320 scope and ±0.5 mm (manufacturer model-table scope) for the competitor scope. Finished-part results also depend on fixtures, TCP calibration, sensing, thermal conditions and tool compliance. Validate the actual process instead of treating catalogue repeatability as a complete accuracy guarantee.

How should purchase prices be compared?

Use current written quotations for Yaskawa Motoman PL320 and FANUC M-410iC/500 with the same arm, controller, software, tooling and commissioning scope. This comparison does not represent an ATC sales offer or stock confirmation. Historical review figures are not a substitute for a configuration-specific purchase quotation.

Can these robots operate safely next to people without guarding?

These specifications do not establish a safe unguarded installation. Assess the complete task, tool, load and machine interface, then implement and validate the required safeguarding and operating procedures. Do not infer collaborative operation from a compact arm, limited payload or education setting.

What should an acceptance test compare?

Use the same parts, actual tool load, fixture locations, path and quality criteria for Yaskawa Motoman PL320 and FANUC M-410iC/500. Check production timing, settling, interruptions and recovery. Include the highest layer and farthest pallet corner. Approve the exact delivered configuration and preserve its final settings.