Posts Tagged 'Linear Step Motor'

New 20mm Linear Stepper Motor now available from Nippon Pulse

RADFORD, Va. – Nippon Pulse is excited to introduce its smallest linear stepper motor yet, the PFL20 Linearstep. The PFL20 is a highly efficient, high thrust tin-can linear actuator with a 20mm diameter and a bipolar winding.

PFL20 is RoHS-compliant, has a 30/60mm effective stroke, and can reach 6 N of force at 200 pps. With 24 steps per revolution, the lead screw has a 1.2mm thread pitch; the PFL20 also reaches 5V rated voltage, resistance of 33 Ohms/phase and inductance of 12mH/phase. The datasheet with additional specifications can be found here.

The simple structure of Linearstep motors – just a threaded rotor hub and lead screw – helps to save space and reduce costs, due to fewer components needed compared to systems that convert rotary motion to linear. Linearstep motors are also easy to control, and can be ordered with unipolar or bipolar windings and a variety of usable voltages. In addition to the 20mm motor size, this motor is also available in 25mm (captive or non-captive option) and 35mm diameter sizes.

Nippon Pulse’s tin-can linear actuators, including the Linearstep, are also available for customization; contact an applications engineer to learn more about our customization capabilities.

Information on the PFL20 from Nippon Pulse can be viewed at:

https://www.electromate.com/assets/catalog-library/pdfs/nippon-pulse/Nippon_Pulse_pfl20_specsheet.pdf

For further information, please contact:

EDITORIAL CONTACT:
Warren Osak
sales@electromate.com
Toll Free Phone:   877-737-8698
Toll Free Fax:       877-737-8699
www.electromate.com

 

Tags:  Linear Step Motor, PFL20, Stepper Motor, Electromate, Nippon Pulse

A Primer on Stepper Motors

A Step Motor is a motor with windings in the stator and permanent magnets attached to the rotor. It provides fixed mechanical increments of motion; these increments are referred to as steps and are generally specified in degrees. A step motor, in conjunction with a stepper drive, rotates in predefined angles proportional to the digital input command (stepper) pulses. A typical full-step system achieves 200 steps per revolution, this equates to 1.8º per full step.

STEPS/REVOLUTION

Steps per revolution equals 360° divided by step angle (0.9°, 1.8°, 3.75°, 7.5° and 15°) when the motors are driven in full-step excitation mode.

0.9° = 400 steps/rev
1.8° = 200 steps/rev
7.5° = 48 steps/rev
15° = 24 steps/rev

ADVANTAGES/DISADVANTAGES

There are several advantages of using stepper motors.  Step motors provide acceleration torque equal to running torque and require no maintenance.  Speed can easily be determined and controlled by remembering speed equals steps per revolution divided by pulse rate.  Stepper motors can also make fine incremental moves and do not require a feedback encoder (open loop). Stepper motors also have fast acceleration capability and have non-cumulative positioning error. Along with excellent low speed/high torque characteristics without gear reduction, stepper motors can also be used to hold loads in a stationary position without creating overheating.

Disadvantages of step motors include: loss of synchronization resulting position error, resonance affecting motor smoothness, limited operation at high speeds, running hot, and can stall with excessive loads.

TYPES OF STEPPER MOTORS

Variable Reluctance:  Has teeth on the rotor and stator but no rotor permanent magnet.

Permanent Magnet:  Has a permanent magnet for a rotor but no soft iron rotor teeth.  Permanent magnet step motors can be subdivided into ‘tin-can or can-stack’ and ‘hybrid’, tin-can (can-stack) being an inexpensive version, and hybrid versions constructed with higher quality bearings, smaller step angle and higher power density.

Hybrid Synchronous:  Combines the magnet from the permanent magnet motor and the rotor and stator teeth from the variable reluctance motor.

ROTARY OR LINEAR STEPPER MOTORS

Step motors can be linear or rotary.  Electromate® offers a full line of low-cost short-delivery hybrid rotary step motors from sizes NEMA 8 to NEMA 42, including IP65 rated step motors and stepper gearmotors.  Electromate®‘s step motors are available in 4, 6 & 8 lead configurations for bipolar or unipolar operation, and can be wired in series or parallel.  All our step motors have optional rear shaft extensions, encoders and gearboxes.

Linear Step Motors are also known as Step Motor Linear Actuators, and have a threaded rod/acme screw in place of a smooth shaft.  Linear step motors provide a simple motion system at a fraction of the cost of conventional rotary stepper motors and traditional linear motion systems.  Linear step motors offers a wide range of customizable options, including various screw pitches, screw lengths, bipolar or unipolar windings, and several operating voltages.

CLICK HERE to view Electromate’s full family of Stepper Motors.

For more information, please contact:

EDITORIAL CONTACT:
Warren Osak
sales@electromate.com
Toll Free Phone:   877-737-8698
Toll Free Fax:       877-737-8699
http://www.electromate.com

 

Tags:  Step Motor, Stepper Motor, Rotary Step Motor, Linear Step Motor, Step Motor Linear Actuator, Variable Reluctance Motor, Hybrid Synchronous Motor,  Permanent Magnet Motor, Electromate


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