STM Series Drives

STM23

The STM Series is an integrated stepper drive+motor unit, fusing step motor and drive technologies into a single device, offering savings on space, wiring, and cost over conventional motor and drive solutions.
The STM also fits with the ST product family of step motors and drives for a complete motion control system.

Dynamic Current Control

Anti-Resonance

Torque Ripple Smoothing

Microstep Emulation

OUTPUT TORQUE:

STM23x-2 - to 125 oz-in

STM23x-3 - to 210 oz-in
PROTECTION:

Over-Voltage

Under-Voltage

Over-Temp

Motor Shorts

Motor Open Phase

Models

S - models

Pulse & Direction
CW/CCW Pulse
A/B Quadrature
Velocity (Oscillator) mode
Host commands (SCL compatible)
SiNet Hub compatible
ST Configurator software for setup

Connections

3 digital inputs
1 digital output
1 analog input

Q - models

Stand-alone operation
Q Programmer for complex motion
Conditional processing
Math functions
Multi-tasking
Register manipulation
Encoder following
“Generic” HMI compatibility

Connections

3 digital inputs
1 digital output
1 analog input

Specifications

POWER AMPLIFIER: All Models
AMPLIFIER TYPE	Dual H-Bridge, 4 Quadrant
CURRENT CONTROL	4 state PWM at 20 kHz
OUTPUT TORQUE	STM23x-2 Series - TO 125 OZ-IN WITH SUITABLE POWER SUPPLY STM23x-3 Series - TO 210 OZ-IN WITH SUITABLE POWER SUPPLY
POWER SUPPLY	External 12 - 70 VDC – Power Supply Required
INPUT VOLTAGE RANGE	12 - 70 VDC
PROTECTION	Over-Voltage, Under-voltage, Over-Temp, Motor/wiring shorts (Phase-to-Phase, Phase-to-Ground)
IDLE CURRENT REDUCTION	Reduction range of 0 – 90% of Running Current after delay selectable in milliseconds
AMBIENT TEMPERATURE	0 to 40 °C (32 - 104 °F) (mounted to suitable heatsink)
HUMIDITY	90% non-condensing

CONTROLLER: All Models
MICROSTEP RESOLUTION	Software selectable from 200 to 51,200 steps/rev in increments of 2 steps/rev
ANTI-RESONANCE (Electronic Damping)	Raises the system damping ratio to eliminate midrange instability and allow stable operation throughout the speed range and improves settling time
TORQUE RIPPLE SMOOTHING	Allows for fine adjustment of phase current waveform harmonic content to reduce low-speed torque ripple in the range 0.25 to 1.5 rps
AUTO SETUP	Measures motor parameters and configures motor current control and anti-resonance gain settings
SELF TEST	Checks Internal & External Power supply voltages. Diagnoses open motor phases and motor resistance changes >40%. Detects encoder wiring and signal faults (differential encoder only)
MICROSTEP EMULATION	Performs high resolution stepping by synthesizing fine microsteps from coarse steps (Step & Direction Mode Only)
COMMAND SIGNAL SMOOTHING	Software configurable filtering reduces jerk and excitation of extraneous system resonances (Step & Direction Mode Only)

CONTROLLER: S Models
NON-VOLATILE STORAGE	Configurations are saved in FLASH memory on-board the DSP
MODE OF OPERATION	Step & Direction, CW/CCW, A/B Quadrature, Oscillator, Joystick, SCL, Hub
STEP AND DIRECTION INPUTS	STEP +/- Optically isolated, 5-24 Volt. Minimum pulse width = 250 ns. Maximum pulse frequency = 3 MHz Function: Step, CW Step, A Quadrature, Encoder Following, CW Limit, CW Jog, START/STOP (Oscillator mode) DIR +/- Optically isolated, 5-24 Volt. Minimum pulse width = 250 ns. Maximum pulse frequency = 3 MHz Function: DIR, CCW Step, B Quadrature, Encoder Following, CCW Limit, CCW Jog, Sensor, DIR (Oscillator mode) Adjustable bandwidth digital noise rejection filter on all inputs
ENABLE INPUT	EN +/- Optically isolated, 5-24 Volt. Minimum pulse width = 250 ns. Maximum pulse frequency = 3 MHz Function: ENABLE, RESET, SPEED 1/SPEED 2 (Oscillator mode)
OUTPUT	Optically isolated, 24V, 40mA MAX Function: Fault, Motion, Tach.
ANALOG INPUT RANGE	0 to 5 VDC
ANALOG INPUT RESOLUTION	12 bits
COMMUNICATION INTERFACE	RS-232 or RS-485

CONTROLLER: Q Models
INPUTS	STEP +/- Optically isolated, 5-24 Volt. Minimum pulse width = 250 ns. Maximum pulse frequency = 3 MHz Function: Step, CW Step, A Quadrature, Encoder Following, CW Limit, CW Jog, START/STOP (Oscillator mode), General Purpose Input DIR +/- Optically isolated, 5-24 Volt. Minimum pulse width = 250 ns. Maximum pulse frequency = 3 MHz Function: DIR, CCW Step, B Quadrature, Encoder Following, CCW Limit, CCW Jog, Sensor, DIR (Oscillator mode), General Purpose Input EN +/- Optically isolated, 5-24 Volt. Minimum pulse width = 250 ns. Maximum pulse frequency = 3 MHz Function: ENABLE, RESET, SPEED 1 /SPEED 2 (Oscillator mode), General Purpose Input Adjustable bandwidth digital noise rejection filter on all inputs
OUTPUT	Optically isolated, 24V, 40mA MAX Function: Fault, Motion, Tach.
ANALOG INPUT RANGE	0 to 5 VDC
ANALOG INPUT RESOLUTION	12 bits
COMMUNICATION INTERFACE	RS-232 or RS-485

APPROVALS: All Models
AGENCY APPROVALS	RoHS CE Certified

PHYSICAL: All Models
MASS	STM23x-2xx = 1lb 14oz STM23x-3xx = 2lb 10oz
ROTOR INERTIA	STM23x-2xx = 1.42 oz-in² STM23x-3xx = 2.51 oz-in²
OPERATING TEMP RANGE	20 to +50 °C (32 - 122 °F)

Speed/Torque Curves

Software

ST Configurator™ – Configure all ST, STAC and STM stepper products

ST Configurator Motor Screen — Motor Screen

Features:

Intuitive interface
Supports all STM integrated steppers
Supports all ST and STAC stepper drives
Drive status and alarm monitoring
Self-test function to test drive/motor operation

About this software:

Used for setup and configuration of the drive+motor.

System Requirements:

Microsoft Windows 10, 8, 7, Vista or XP, 32-bit or 64-bit.