Parker Electromechanical
eCL Series Closed Loop Stepper System

Closed Loop Stepper Systems - E Series

The new eCL series introduces simple and precise closed loop control to Parkers microstepping product platform. The eCL system maintains the inherent advantages of stepper control while eliminating common disadvantages through the addition of an innovative closed loop control algorithm for optimum performance

  • Available in two driver form factors (4A) and (2A)
  • 24VDC input
  • Small, precise, high torque stepper motors with connectors
  • EtherCAT and Step/Direction drive options
  • All motors include encoders (Nema8, 11, 17, 23)
  • Selectable resolution up to 50,000 steps/rev.
  • Closed loop performance without tuning

Parker eCL 

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The eCL system maintains the inherent advantages of stepper control (high torque, stiffness, responsiveness, stability, no dither, simplicity) while eliminating common disadvantages (stalling, energy usage, motor temp, high speed operation, positional accuracy) through the addition of an innovative closed loop control algorithm. 

e-Series Closed Loop Steppers 2 Closed Loop System The eCL system is an innovative closed loop stepper motor and controller that utilizes motor mounted feedback to constantly monitor shaft position. Actual motor shaft position data is updated every 25 microseconds allowing the drive to compensate for sudden load changes ensuring accurate position control. • In-position output signals controller that move is complete • Prevents stalls thru position monitoring • Alarm signal to controller if overload results in motor stalling • Reduced motor heating and energy usage Better Performance Synchronization errors and motor stalling that plague traditional stepper systems are eliminated with the eCL’s closed loop control algorithm allowing for higher torque and speed performance. The eCL also incorporates a “Peak Torque Boost” feature that increases available torque for starting and stopping by as much as 50%. Complete stop Hunting Speed Torque Conventional Stepping e-series Closed Loop No Tuning, no hunting Unlike traditional closed loop servo systems, the eCL system requires no tuning. Gains have been optimized for the motor/drive combination to insure smooth and stable motion. Once the eCL motor reaches its target position, the rotor locks into place at a perfect standstill. Traditional servo motors typically hunt between encoder pulses at standstill which could adversely affect applications requiring zero vibration.

Drive Specifications Part Number eCLD-2DC-SD eCLD-4DC-SD Ouput Current, amps 2 4 Drive Input Voltage 24VDC +/-10% Current Consumption 500mA (excluding motor current) Control Method Closed Loop Control Command Signal Type Step & Direction (1-pulse) or CW/CCW (2-Pulse) Selectable via DIP switch 5V TTL or 12-24V open collector Input Rate 500kHz maximum Rotational Direction CW/CCW (Selectable via DIP switch) Resolution 16 Selectable choices : 500, 1000, 1600, 2000, 3200, 3600, 4000, 5000, 6400, 8000, 10000, 20000, 25000, 36000, 40000, 50000 (Selectable via DIP switches) I/O Inputs Enable, Alarm reset 5-24VDC opto-isolated Outputs In-position, Alarm 5-24VDC opto-isolated Protective Functions Overcurrent, Over speed, Position Tracking Error, Over Load, Over Temperature, Over Voltage, Motor Connection Error, Encoder Connection Error, Motor Voltage Error, In-Position Error, ROM Error, Position Overflow Error LED Display Power status, In-Position status, Enable status, Alarm status Environmental 0 - 50 ºC ( 32 - 122 ºF ) 35 -85% non-condensing Standards CE (EMC) RoHS e-Series Closed Lo

Catalogs
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444.7 kB
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4.8 MB
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