The Newport ESP301-3N is a 3-axis motor controller and driver engineered for precision motion control in laboratory and industrial settings. As the successor to the ESP300, it combines a 64-bit floating-point DSP processor with advanced digital PID servo control to drive DC brush motors, 2-phase stepper motors, and 4-phase stepper motors with synchronized accuracy across up to three axes. Each axis delivers up to 3 A maximum current at 48 V output, supporting complex motion profiles including 3D linear interpolation, 2D circular contouring, and electronic gearing for master-slave configurations.
Technical Specifications
• Processor: 64-bit floating-point DSP with 0.4 ms update rate
• Control Algorithm: Digital PID servo loop with velocity and acceleration feed-forward
• Micro-step Resolution: 1000x programmable for stepper motors
• DC Motor DAC Resolution: 18-bit
• Encoder Input: 5 MHz maximum frequency
• Stepper Commutation Rate: 10 kHz
• Motor Output: 48 V maximum, 3 A per axis, 150 W total available power
• Contouring: 2D with continuous buffer loading; trapezoidal and S-curve profiles supported
• Motion Control: Synchronized point-to-point, 3D linear and 2D circular interpolation, electronic gearing, on-the-fly trajectory changes
– Key Features
• Auto-detection and auto-configuration of Newport ESP-compatible stages
• Advanced homing with encoder index pulse consideration
• Linear error and backlash compensation
• Master-slave axis synchronization with independent motor/gear ratio support
• Programmable velocity profiles for smooth low-speed stepper operation
– Interfaces
USB (VCP), RS-232, and optional IEEE-488.1 GPIB connectivity enable integration with standard laboratory and automation systems.
– Compatibility & Integration
The ESP301-3N maintains backward compatibility with existing ESP systems while offering enhanced functionality through its standard USB interface and improved front panel controls. Plug-and-play operation with compatible Newport stages minimizes configuration time and setup errors.
