Which robot is better for this application?

DENSO HM-4085 is the stronger starting point for 10 kg planar handling within the selected 850 mm SCARA envelope, while Mitsubishi Electric RH-12FRH is worth shortlisting for 12 kg planar handling within the selected 850 mm SCARA envelope. 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 10 kg for the specified DENSO HM-4085 example and 12 kg for Mitsubishi Electric RH-12FRH 12 kg / 850 mm, subject to all documented load and orientation conditions. Include the tool, adapters, sensors and carried part. Four axes do not provide arbitrary wrist pitch and roll.

Does the stated reach guarantee access to my fixture?

No. The comparison gives 850 mm for DENSO HM-4085 and 850 mm for Mitsubishi Electric RH-12FRH 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 ±0.025 mm for DENSO HM-4085 scope and ±0.015 mm 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 DENSO HM-4085 and Mitsubishi Electric RH-12FRH 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 DENSO HM-4085 and Mitsubishi Electric RH-12FRH. Check production timing, settling, interruptions and recovery. Include the most difficult loaded approach and retreat. Approve the exact delivered configuration and preserve its final settings.