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Applied Motion Products STM24x-xxx Integrated Drive+Motor w/Encoder

STM24x-xxx Integrated Drive+Motor w/Encoder

The STM24SF-3AE and STM24SF-3RE integrated stepper is a drive+motor unit, fusing a NEMA 24 step motor and a sophisticated, 6.0 A/phase (peak-of-sine) step motor drive into a single device. Power to the drive, located at the rear of the motor, must be supplied by an external DC supply.


This integrated stepper can operate in the following control modes: step (pulse) & direction, velocity (oscillator), and streaming serial commands (SCL). (STM24 integrated steppers do not support stored-program operation with the Applied Motion 4-axis and 8-axis SiNet Hubs). All STM24 integrated steppers are setup and configured using Applied Motion’s ST Configurator™ software.


An integral 1000-line (4000 count/rev) incremental encoder is housed inside the same enclosure as the drive electronics, providing protection from dust and debris. The integration of the encoder means the stepper can perform special functions not available otherwise. Stall Detection notifies the system as soon as the required torque is too great for the motor, which results in a loss of synchronization between the rotor and stator, also known as stalling. Stall Prevention actually prevents stalling of the step motor by dynamically adjusting motor speed to maintain synchronization of the rotor to the stator. This unique feature allows step motors to operate in a much broader range of applications than previously available to step motors, such as torque-control applications. The Stall Prevention feature also performs static position maintenance, which maintains the position of the motor shaft when at rest.


The STM24SF-3AE and STM24SF-3RE comes with 4 digital I/O points, called Flex I/O points, because each point can be individually defined as an input or an output. As inputs, the Flex I/O points accept signals of 5-24 VDC and can be used for connecting pulse & direction signals, end-of-travel limit switches, jog switches, quadrature encoder signals, PLC outputs, sensors, or many other signal types. When defined as digital outputs, the Flex I/O points can be connected to PLC inputs, counters, lights, relays, or other devices. The unit also comes with 1 analog input that accepts 0-5 VDC signals, which can be us


The STM24SF-3AE comes with an RS-232 port for programming and serial communications. The STM24SF-3RE comes with an RS-485 port for programming and serial communications.


Features include:

  • Sophisticated current control
  • Anti-resonance
  • Torque ripple smoothing
  • Microstep emulation
  • Step & direction, CW/CCW pulse, and A/B quadrature control modes
  • Oscillator (velocity) control mode
  • Streaming serial commands
  • Built-in incremental encoder

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SPECIFICATIONS

Part Number Frame Size Supply Voltage Control Mode Holding Torque (oz-in) Communication Ports Encoder Feedback
STM24SF-3AE NEMA 24 12-70 VDC Step & Direction
Velocity (Oscillator)
Streaming Commands
340 RS-232 Yes
STM24SF-3RE NEMA 24 12-70 VDC Step & Direction
Velocity (Oscillator)
Streaming Commands
340 RS-485 Yes