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Used compacting in Guangdong, China

Overview

SCARA (Selective Compliance Assembly Robot Arm) robots are compact, high-speed pick-and-place and assembly robots with a rigid vertical axis and compliant horizontal axes. They excel at fast horizontal movements, tight repeatability, and small footprints, making them ideal for electronics assembly, packaging, and light machine tending. SCARAs offer high cycle rates and simple programming but have limited vertical reach and flexibility compared with multi-axis articulated robots.

FAQ

What key specs should I check when buying a SCARA robot?

Check payload, horizontal reach, repeatability, cycle time, wrist axes, controller type, and mounting orientation. Also confirm electrical requirements and available I/O for your end effector and PLC.

Is it better to buy new or used?

New gives warranty and latest controllers; used can be cost-effective if well-documented. For used units verify maintenance history, encoder and motor condition, controller firmware, and run a factory acceptance test.

How should a SCARA be shipped to avoid damage?

Ship in original or custom crating with vibration dampers. Secure the arm in transport position, remove or lock bearings if required, and insure against shock. Use rigid rigging—shift-sensitive components need protection from heavy handling.

What do I need for installation and commissioning?

Plan for a flat, vibration-free mounting surface, proper power and grounding, network connections, and safe workcell guarding. Expect onsite robot parameter tuning, end-effector setup, and controller-to-PLC/vision integration.

How often does a SCARA need maintenance?

Regular checks every 3–6 months: inspect cables, connectors, belts or harmonic drives, lubricate as manufacturer specifies, verify encoder signals and backlash. Replace wear items per hours or cycles and follow the OEM schedule.

Can I reuse end-effectors from other machines?

Often yes if mechanical interfaces and payload limits match. Verify flange compatibility, signal/electric connections, and that the tool weight doesn’t exceed the robot’s dynamic payload rating.

What safety and certification should I look for?

Ensure compliance with local machinery safety standards (e.g., ISO 10218, ISO/TS 15066), proper guarding or rated safety controllers, emergency stops, and documented risk assessment for collaborative or fenced cells.

How do I integrate vision or PLC systems?

Confirm the controller supports the communication protocols you need (Ethernet/IP, Profinet, Modbus, TCP/IP). Many SCARA controllers have built-in vision interfaces or SDKs for third‑party cameras; budget for software tuning and I/O mapping.