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Stepper Motor Drive - DC Current, STR Series
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.
・Materials
The STR series stepper drives are compact, powerful, digital step & direction drives available in three power ranges: 2.2 A/phase (STR2), 4.5 A/phase (STR4) and 8 A/phase (STR8). These 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.
Each STR step motor drive operates in either 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 1.8º 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.
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.
The STR series stepper drives are compact, powerful, digital step & direction drives available in three power ranges: 2.2 A/phase (STR2), 4.5 A/phase (STR4) and 8 A/phase (STR8). These 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.
Each STR step motor drive operates in either 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 1.8º 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.
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.
| Three versions STR2, STR4 & STR8 capable of driving motors from HT08 to HT34. |
| • Switch Sellectable Parameters • Anti-Resonance • Microstepping •Misrostep Emulation •Self Testing |
Specifications
| Part Number | Supply Voltage | Control Modes | Output Current | Communication Port | Encoder Feedback |
| STR2 | 12 to 48 VDC | Step & Direction | 0.3-2.2 A/Phase | None | None |
| STR4 | 24 to 48 VDC | 0.25-4.5 A/Phase | |||
| STR8 | 24 to 75 VDC | 0.5-8.0 A/Phase |
| STEPPER DRIVE SPECIFICATION | ||||||||
| STR2 | STR4 | STR8 | STR2 | STR4 | STR8 | |||
| Amplifier Type | Dual H-bridge, 4 Quadrant | Step Input | 5-24V Sinking* | 5- 24V Differential* | ||||
| Current Control | 4 State PWM at 16kHz | 4 State PWM at 20kHz | Direction Input | 5-24V Sinking* | 5- 24V Differential* | |||
| Output Current / Phase | 0.3-2.2A, peak of sine | 0.25-4.5A, peak of sine | 0.5-8.0A, peak of sine | Enable Input | 5-24V Sinking | 5- 24V Differential | ||
| Power Supply | External 12-48 VDC | External 24-48 VDC | External 24-75 VDC | Fault Output | 30V/80mA Max, optically isolated, sinking or sourcing. | |||
| Protection | Over-voltage, Under-voltage, Motor / Wiring Shorts | Drive/ Motor Settings | ||||||
| Idle Current | 50% or 90% or running current, switch selescable | Motor Select | Dip Switches | Rotary Switch | ||||
| Modes of Operation | Step (pulse)& Direction or CW/CCW (pulse-pulse), jumper selectable | Running Current | Dip switch selectable 100%, 90%, 80% ro 70% | |||||
| Step Resolution | Switch Selectable, 200, 400, 2000, 5000, 12800 or 20000 Steps/Rev | Idel Current | Dip switch selectable 50% or 90% | |||||
| Anti-Resonance (Electronic Damping) | Raises the system damping ratio to eleminate midrange instability and allow stable operation throughout the speer range and improves setteling time. Dip Switch setting for range of load-to-motor inertia ratio | Load Inertia Ratio | Dip switch selectable (0-4X or 0-5X) | |||||
| Step Size | Switch Selectable, 200, 400, 2000, 5000, 12800 or 20000 Steps/Rev | |||||||
| Step Pulse Type | Step (pulse)& Direction or CW/CCW (pulse-pulse), jumper selectable | |||||||
| Step Noise Fliter | Jumper 150kHz, 2MHz. | Dip switch selectable, 150 kHz or 2MHz | ||||||
| Self Test | Dip switch setting for automaticly rotating step motor to test connections | Self Test | Dip switch selectable, Rotate motor back and forth | |||||
| Mocrostep Emulation | Performs high resolution stepping by synthesizing fine microsteps from coarse steps. Available from Full (200 Smooth) and Half (400 Smooth) Step resolutions. | Weight | 133 g. | 306 g | ||||
| Operation Temperature | 0 to 85° C Interior of electronics section | |||||||
| Ambient Temperature | 0 to 50° C Drive must be mounted to a suitable heatsink | |||||||
| Humidity | 90% Non-condensing | |||||||
| Agency Approvals | CE (EMC): EN 61800-3:2004, CE (LVD): EN 61800-5-1:2003 | |||||||
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Basic Information
| Category | Drive | Voltage Specifications | DC | Programming | Step & Direction or CW/CCW |
|---|---|---|---|---|---|
| Communication Ports | N/A | Closed Loop Feedback | No |
- The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .
Additional Products in this Category
- Stepper Motor Drive - AC Current, STAC Series
- Stepper Motor - Integrated Drive and Motor, STM17 Series
- ST Plus Series DC Stepper Drives
- Stepper Motor - Integrated Drive and Motor, STM23 Series
- Stepper Motor - High Torque, NEMA 17
- Stepper Motor - High Torque, NEMA 24
- Stepper Motor - High Torque, NEMA 34
- Stepper Motor - Integrated Drive and Motor, STM24 Series
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