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STM23R Series Integrated Stepper Motors

The STM23R Integrated Motor is a cost effective, high performance, motor with the drive built in. It is based on advanced digital current control technology, and features high torque, low noise, and low vibration. Operational parameters are switch selectable.
● Anti-Resonance
● Torque Ripple Smoothing
● Microstep Emulation
● Stall Detection and Stall Prevention
● Dynamic Current Control
● Command Signal Smoothing
Brand Name: MOONS'
Price: USD  163.0  -  252.0  EA
Free shipping to USA for orders of $100 or more 
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Buyer Protection:
Free Exchange if the item has quality problems within 1 year. Learn more


The STM-R is an integrated Drive+Motor, fusing step motor and drive technologies into a single device, offering savings on space, wiring and cost over conventional motor and drive solutions. STM-R offers NEMA 17, and 23 two frame sizes


Anti-ResonanceStep motor systems have a natural tendency to resonate at certain speeds.The SR drives auaomatically calculate the system’s natural frequency and apply damping to the control algorithm. This greatly improves midrange stability, allows higher speeds and greater torque utilization, and also improves settling times.
Provides better motor performance and higher speeds
Microstep EmulationWith Microstep Emulation, low resolution systems can still provide smooth motion. The drive can take low resolution step pulses and create fine resolution motion.
Delivers smoother motion in any application
Torque Ripple SmoothingAll step motors have an inherent low speed torque ripple that can affect the motion profile of the motor. By analyzing this torque ripple the system can apply a negative harmonic to counter this effect.
This gives the motor much smoother motion at low speed.
Command Signal SmoothingCommand Signal smoothing can soften the effect of immediate changes in velocity and direction, making the motion of the motor less jerky. An added advantage is that it can reduce the wear on mechanical components.
Improves smoother system performance
Improves smoother system performanceAt start-up the drive measures motor parameters, including the resistance and inductance, then uses this information to optimize the system performance.

Control Options

•Step & Direction
•CW & CCW pulse
•A/B quadrature (master encoder)
•Switch settings

Model Numbering System

Ordering Information 

Model Output Torque Standard Double shaft Encoder
STM23R-2 0.9N·m    
STM23R-3 1.5N·m    

Power Amplifier

Amplifier Type Dual H-Bridge, 4 Quadrant
Current Control 4 state PWM at 16 KHz
Power Supply External 12 - 70 volt power supply required
Input Voltage Range 10 - 75 volts min/max (nominal 12 - 70 volts)
Protection Over-voltage, under-voltage, over-temp,   internal motor shorts (phase-to-phase, phase-to-ground)
Idle Current Reduction Switch selectable for reduction to 50% or 90% of running current
Ambient Temperature 0 - 40°C (32 - 104°F) when mounted to a suitable heatsink
Humidity 90% non-condensing


Current Control Advanced digital current control provides excellent high speed torque
Speed Range Speeds up to 3000 rpm
Auto Setup Measures motor parameters to configure current control and anti-resonance gain settings
Encoder Feedback Optional 1000 line external encoder
Step Input STEP+/- Inputs: optically isolated, 5 - 24 volts, min. pulse width 250 ns., max. pulse frequency 2 MHz; motor executes one step on the falling edge of the STEP input signal
Direction Input DIR+/- Inputs: optically isolated, 5 - 24 volts, min. pulse width 50 μs, max. pulse frequency 2 MHz; direction of rotation is controlled by the DIR input state
Enable Input EN+/- Inputs: optically isolated, 5 - 24 volts, min. pulse width 100 us., max. pulse frequency 10 KHz; enables or disables the drive amplifier
Output OUT+/- Open Collector, 30 volts, 100 mA max, max. pulse frequency 10 KHz; closes when the drive encounters an error, open when the drive is operating normally

Switch Selections

Running current - output current is set by SW1 & SW2 with a total of 4 settings: 50%, 70%, 90% and 100% of the running current.
Idle Current - can be set by SW3 for 50% of running value to reduce motor and drive heating, or for 90% when a high holding torque is required.
Self test - set by SW4 to check the physical operation of the motor.
Input Noise Filter - set by SW5 this filters out unwanted electrical noise. The frequency of the filter can be set to 150KHz or 2MHz.
Step Smoothing Filter - also called microstep emulation, smooth motion can be obtained from coarse command signals by setting SW6 to ON.
Anti-Resonance/Electronic Damping - setting SW7 for the proper inertia load, low (OFF) or high (ON), can greatly improve the motor’s performance.
Step Pulse Type - SW8 allows the motor to be used with either CW/CCW pulse type command signals (ON), or STEP/DIR pulse type signals (OFF).
Microstep resolution - SW9, SW10, SW11, and SW12 set the microstep resolution at one of 16 settings: 200, 400, 800, 1600, 3200, 6400, 12800, 25600, 1000, 2000, 4000, 5000, 8000, 10000, 20000, or 25000 steps/rev.

Compare Item Price
Buy Now
STM23R-2 $163.00
STM23R-3 $180.00
STM23R-2E $248.00
STM23R-3E $252.00
STM23R-2D $172.00
STM23R-3D $174.00

Torque Curves

Dimension (Units: mm)

2D Drawings
Title Type Size(KB) Date View times Download
STM23R-3_2D Drawing.pdf PDF 30 2017-05-19 3
STM23R-3D_2D Drawing.pdf PDF 48 2017-05-19 3
STM23R-2_2D Drawing.pdf PDF 32 2017-05-19 2
STM23R-3_2D Drawing.DWG DWG 150 2017-05-19 1
STM23R-3E_2D Drawing.pdf PDF 32 2017-05-19 1
STM23R-2D_2D Drawing.DWG DWG 306 2017-05-19 0
STM23R-2D_2D Drawing.pdf PDF 54 2017-05-19 0
STM23R-2E_2D Drawing.pdf PDF 39 2017-05-19 0
STM23R-2E_2D Drawing.DWG DWG 263 2017-05-19 0
STM23R-2_2D Drawing.DWG DWG 130 2017-05-19 0
STM23R-3D_2D Drawing.DWG DWG 213 2017-05-19 0
STM23R-3E_2D Drawing.DWG DWG 174 2017-05-19 0
3D Model
Title Type Size(KB) Date View times Download
STM23R-3_3D Model.step STEP 13738 2017-05-17 7
STM23R-2_3D Model.step STEP 13651 2017-05-17 3
Title Type Size(KB) Date View times Download
STM23R Series_Brochure.pdf PDF 1455 2017-05-16 8
User Manual
Title Type Size(KB) Date View times Download
STM23R Series_User Manual.pdf PDF 3646 2017-05-16 22
Title Type Size(KB) Date View times Download
STM23R Series_Specifications.pdf PDF 995 2017-05-16 6
Quick Start
Title Type Size(KB) Date View times Download
STM23R Series_Quick start.pdf PDF 704 2017-05-16 6
Title Type Size(KB) Date View times Download
STM23R Series_CE.pdf PDF 665 2017-05-17 2
STM23R Series_RoHS.pdf PDF 264 2017-05-17 2
Title Type Size(KB) Date View times Download
RS485 Bus Utility Setup RAR 1834 2017-06-14 101
CANopen Test Tool RAR 4768 2017-06-14 85
ST Configurator 3.3.8_Software.rar RAR 24052 2017-06-14 74

Delivery & Packaging

Ensure your ordered products are always safely packaged from easy click to
fast delivery to your hands

Fast Delivery

Fast Cross-Border Delivery MOONS' chooses DHL as our main international express shipping partner. As the world's leading logistics specialist, DHL provides our customers with fast and professional inter- national door-to-door delivery service.
Estimated Delivery Time: e.g. China-USA major cities 3 business days.

Safely Packaging

In order to ensure your shipments withstand the long trip and arrive safely and intact, MOONS' specially designed Individual package to pass the drop test with its stable structure. Besides, the package is made from recyclable materials, providing you with professional safety delivery.

Professional Product Label

Considering all possible harsh application environments, MOONS' specially designed label for each product, which passes water-resistance test, durability rub test, high temperature resistance and corrosion resistance tests.

Tip: This label design is suitable for products of stepper motor.