STR Stepper Drives | Applied Motion

Series Features

Prices starting at $90
Step & direction or pulse/pulse control
Advanced microstepping control
Anti-resonance increases torque
Microstep emulation provides smooth motion
Idle current reduction reduces motor heating
Simple setup with on-board switches
Matched step motors available
Six models to choose from
(For integrated motors with similar features see the STM-R Integrated Steppers)

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Products in the Series

* Items with web only pricing are highlighted in yellow. * Closeout priced products are highlighted in green.

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Model Number	Supply Voltage	Control Modes	Output Current, Continuous	Communication Ports	Encoder Feedback	1pc.	Compare
STR2	12-48 VDC	Step & Direction	0.3-2.2 A/Phase	NA	No	$117.00	905
STR3	12-48 VDC	Step & Direction	0.3-3.0 A/Phase	NA	No	$108.00	1610
STR4	24-48 VDC	Step & Direction	1.12-4.5 A/Phase	NA	No	$128.00	63
STR8	24-75 VDC	Step & Direction	2.35-8.0 A/Phase	NA	No	$128.00	117
STRAC2	90-240 VAC	Step & Direction	0.5-2.5 A/Phase	NA	No	$464.00	1783
STRAC8	90-240 VAC	Step & Direction	0.5-8.0 A/Phase	NA	No	$549.00	1784

Series Details

STR series stepper drives are compact, powerful, digital step & direction drives available for operation with either AC or DC supply voltages. Drives for DC power are ideal for smaller motors (NEMA sizes 11, 14, 17, 23), when physical space is limited around the drive, and when multiple drives are used on a common power supply. AC powered drives are best for larger motors (NEMA sizes 23, 24 and 34) and when maximimum power is required.

DC powered STR drives:

STR2 ... up to 2.2 A/phase ... DC supplies of 12 to 48 VDC
STR3 ... up to 3.0 A/phase ... DC supplies of 12 to 48 VDC
STR4 ... up to 4.5 A/phase ... DC supplies of 24 to 48 VDC
STR8 ... up to 8.0 A/phase ... DC supplies of 24 to 75 VDC

AC powered STRAC drives:

STRAC2 ... up to 2.4 A/phase ... AC supplies of 90 to 240 VAC
STRAC8 ... up to 8.0 A/phase ... AC supplies of 90 to 240 VAC

Advanced performance for basic applications

All STR drives are great for OEM applications requiring basic step & direction control of a 2-phase step motor. STR drives feature advanced microstepping performance and sophisticated current control with anti-resonance. Anti-resonance electronically damps motor and system resonances, which improves motor smoothness and torque over a wide speed range.

Every STR step motor drive operates in step & direction or pulse/pulse control mode. Selecting between these two modes is done by moving a jumper located under the cover of the drive. Each STR drive can microstep up to 20,000 steps/rev with a 1.8° step motor (1/100 step), and can even microstep the step motor when the command pulses are low resolution. This feature is called Microstep Emulation. All drive setup is done via dip or rotary switches on the side of the drive, including motor selection, running current, idle current, and step resolution. No software is required.

A large offering of compatible step motors

STR stepper drives are available with a large family of compatible 2-phase step motors, selected to optimize performance of both the drive and motor. Compatible step motors are listed on each drive's product page in the Recommended Products section. Speed-torque curves are also listed on drive pages, and are an excellent starting point for determining the best drive + motor + power supply combination for your application