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ABB DSQC668 Axis Computer  

1. Key Parameters

• Product Model: DSQC668
• Order Code Reference: Typically paired with IRC5 extended axis kits (e.g., 3HAC031690-001) for procurement
• Product Series: ABB IRC5 Robot Controller Advanced Axis Control Computers
• Core Function: Executes advanced kinematic calculations for multi-axis robots and external axes; synchronizes motion between robot and external axes; processes encoder feedback for high-precision positioning; supports complex trajectory planning
• Processing Performance:
  • Main Processor: 32-bit floating-point DSP (Digital Signal Processor) with 1GHz clock speed
  • Co-Processor: Dual-core ARM Cortex-A9 (800MHz) for parallel processing of kinematics and communication
  • Calculation Capacity: Up to 12 axes (6 robot axes + 6 external axes)
  • Position Update Rate: 1kHz (1ms interval for real-time position adjustments)
  • Kinematic Calculation Time: ≤50µs per axis (enables high-speed trajectory planning)
• Memory Specifications:
  • Flash Memory: 1GB (stores axis parameters, kinematic models, and firmware)
  • RAM: 512MB DDR3 (for real-time data processing and trajectory buffering)
• Axis Control Capabilities:
  • Supported Axis Types: Revolute, prismatic, linear tracks, rotary positioners, and gantry systems
  • Positioning Accuracy: ±0.01mm (when paired with high-resolution encoders)
  • Synchronization Accuracy: ≤10µs between robot and external axes
  • Control Modes: Position control, speed control, torque control (configurable per axis)
• Communication Interfaces:
  • Internal Communication: ABB proprietary high-speed axis bus (2Gbps) for data exchange with IRC5 control board and drive modules
  • Encoder Interfaces: 12× high-resolution encoder inputs (20-bit absolute encoders; supports Hiperface® and EnDat® protocols)
  • Diagnostic Interface: Ethernet (10/100/1000Base-T) for configuration and fault logging via RobotStudio
• Electrical Specifications:
  • Power Supply (from IRC5 Backplane): 5V DC ±5% (typical current: 3A; maximum current: 4A)
  • Power Consumption: ≤20W
  • Isolation: 2.5kVrms (between encoder interfaces and internal circuits; prevents noise interference)
  • EMC Immunity: Compliant with IEC 61000-6-2 (industrial environment)
• Mechanical Specifications:
  • Form Factor: PCB with ruggedized edge connectors (compatible with IRC5 controller’s axis compartment)
  • Dimensions (W×H×D): 250mm × 180mm × 30mm
  • Mounting: Slot-mounted in IRC5 controller’s dedicated axis computer slot
  • Weight: Approximately 500g
  • LED Indicators (on board edge):
    • Power (PWR): Green (powered on); Red (power fault)
    • Processor (CPU): Green (normal operation); Amber (high load >90%); Red (processor fault)
    • Axis Bus (BUS): Green (communication normal); Blinking Green (data transmission); Red (bus fault)
    • Encoder (ENC): Green (encoder signals valid); Red (encoder fault or signal loss)
• Environmental Ratings:
  • Operating Temperature Range: 0℃~+45℃ (32℉~113℉)
  • Storage Temperature Range: -20℃~+70℃ (-4℉~158℉)
  • Humidity Tolerance: ≤85% RH (non-condensing, 40℃)
  • Vibration Resistance: 10~500Hz, 1g acceleration (IEC 60068-2-6)
  • Shock Resistance: 15g acceleration (11ms duration, IEC 60068-2-27)
• Compliance Standards: IEC 61131-3 (programmable controllers), EN ISO 13849-1 (safety-related control systems), UL 508, CE, RoHS

2. Key Features

• Multi-Axis Control Capacity: Supports up to 12 axes (6 robot + 6 external) for complex automation systems—ideal for robots with integrated tracks, positioners, or gantries (e.g., IRB 7600 with linear track).
• High-Speed Kinematic Processing: 1GHz DSP and 50µs per-axis calculation time enable real-time trajectory planning for high-speed applications (e.g., automotive spot welding with synchronized positioners).
• Precision Synchronization: ≤10µs synchronization between robot and external axes ensures accurate motion coordination—critical for tasks like robotic drilling on moving aircraft components.
• Advanced Encoder Support: Compatible with 20-bit absolute encoders (Hiperface®/EnDat®) delivers ±0.01mm positioning accuracy—essential for precision assembly and machining applications.
• Seamless IRC5 Integration: Works in parallel with DSQC503A control board via 2Gbps axis bus—shares processing load for complex motion tasks without latency.
• Flexible Axis Configuration: Supports various axis types (revolute, prismatic, tracks) with configurable control modes (position/speed/torque)—adapts to diverse robot cell layouts.
• Comprehensive Diagnostics: Real-time monitoring of axis performance, encoder status, and bus communication via RobotStudio—enables predictive maintenance and quick fault resolution.

3. Application Fields

• Extended Axis Robot Systems: Primary application—controls multi-axis configurations in:
  • Automotive Manufacturing: Manages IRB 6700 robots with 7th-axis linear tracks and 2 positioners; synchronizes motion for car body welding across large workspaces.
  • Aerospace Assembly: Controls IRB 7800 robots with external rotary axes for aircraft wing drilling; ensures ±0.01mm positioning accuracy for fastener holes.
• Complex Motion Coordination: Enables synchronized operations in:
  • Heavy Machinery Production: Coordinates IRB 8700 robots with gantry systems for lifting and positioning large components; maintains precise alignment during assembly.
  • Electronics Manufacturing: Controls SCARA robots with additional Z-axis and conveyor tracking; synchronizes pick-and-place motion with moving belts.
• High-Speed Automation Lines: Supports rapid trajectory planning in:
  • Packaging Industry: Manages delta robots with external product orientation axes; enables high-speed sorting and packaging with precise orientation control.
  • Metal Processing: Controls robotic cutting systems with linear tracks; maintains constant speed and accuracy during high-speed plasma or laser cutting.

4. Precautions

• IRC5 Exclusivity: Use exclusively with ABB IRC5 controllers. Do not integrate with older ABB controllers (e.g., S4C+) or non-ABB systems—communication protocol mismatches will cause system failures.
• Static Electricity Protection: Always use ESD wristbands when handling the board—sensitive electronic components are vulnerable to static damage.
• Axis Configuration:
  • Configure axis parameters (kinematic models, encoder types) via RobotStudio only—incorrect settings cause positioning errors or axis desynchronization.
  • After replacing the DSQC668, re-calibrate all axes using ABB calibration tools to restore positioning accuracy.
• Thermal Management: Ensure proper ventilation in the IRC5 controller—operating above +45℃ causes thermal throttling and reduces processing performance.
• Encoder Wiring: Use shielded cables for encoder connections and ground shields at both ends—noise interference can cause encoder signal loss and motion faults.
• Maintenance Checks:
  • Inspect quarterly for loose connectors or damaged components—tighten connections and replace the board if damage is found.
  • Verify LED statuses during operation—red LEDs indicate faults requiring immediate attention (e.g., encoder signal loss).
• Firmware Compatibility: Ensure firmware version matches IRC5 controller system firmware—mismatched versions cause communication errors and motion instability

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