Linear Motor Tracks Parts, U-Channel Magnetic Motor Assemblies

$5.00

Lorderan produce the most comprehensive standard linear motors ranges in the industry and all OEM linear motor tracks, (iron-core Linear motors and ironless linear motors), U Types and Flat Linear Motors, for a multitude of applications including no contact, low noise, and high temperature environments.

If you have a question, please contact us to speak with a magnet specialist.

$5.00
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Lorderan offers the most comprehensive standard linear motors range in the industry and all OEM linear motor Tracks - ironcore linear motors, ironless linear motors, U Types and flat  linear motors benefit from Lorderan's unique design. This architecture enables an excellent peak force density in the magnetic gap, as well as unmatched thermal efficiency, which is a significant advantage for thermal-drift-sensitive precision machines.

Custom Linear Motor Assemblies, Why choose Lorderan

  • Unique technology
  • Unmatched performances
  • Direct drive expertise
  • High quality and Compeitive prices
  • Ease of integration
  • Product range

What is a Linear Motor-----Direct Drive Advantages

Reduced cost of ownership

Direct coupling of the payload to the motor’s moving part eliminates the need for mechanical transmission elements such as leadscrews, timing belts, rack and pinion, and worm gear drives. Unlike brushed motors, there is no contact between the moving parts in a direct drive system. Therefore there is no mechanical wear resulting in excellent reliability and long lifetime. Fewer mechanical parts minimize maintenance and reduce the system cost. The direct drive technology intrinsic to a linear motor based system results in an efficient and effective gearless assembly.

Easy integration

linear motors are available in a wide range of sizes and can be easily adapted to most applications.unmatched standard product offering includes ironless and ironcore linear motors. Each technology has specific advantages:

(1) Ironcore linear motors’ configuration minimizes the volume required for integration in machines. They are very compact and produce the greatest force per package size.

(2) Ironless linear motors’ shape is very thin and gives machine builders great flexibility in locating the motors. In addition, ironless motors provide no force ripple and have very low moving masses.

Dynamic performance

Linear motor applications have a wide range of dynamic performance requirements. Depending on the specifics of a system’s duty cycle, the peak force and maximum speed will drive the selection of a motor:

An application with a light payload that requires very high speed and acceleration will typically utilize an ironless linear motor (that has a very light moving part containing no iron). As they have no attraction force, ironless motors are preferred with air bearings, when the speed stability has to be below 0.1%.

Ironcore motors produce greater force per package size by using laminations to concentrate the magnetic flux. With a larger continuous force, these motors fit very well to mid- and high-dynamic applications requesting high duty cycle.

Wide force-speed range

Direct drive linear motors deliver high force over a wide range of speeds, from a stalled or low speed condition to high velocities. Linear motors can achieve very high velocities (up to 15 m/s) with a trade off in force for ironcore motors, as technology becomes limited by eddy current losses.

Linear motors achieve very smooth velocity regulation, with low ripple. The performance of a linear motor over its velocity range can be seen in the force-speed curve present in the correponding data sheet.

What is a Linear Motor ----- Principle

Linear motors are a special class of synchronous brushless servo motors. They work like torque motors, but are opened up and rolled out flat. Through the electromagnetic interaction between a coil assembly (primary part) and a permanent magnet assembly (secondary part), the electrical energy is converted to linear mechanical energy with a high level of efficiency. Other common names for the primary component are motor, moving part, slider or glider, while the secondary part is also called magnetic way or magnet track.

Since linear motors are designed to produce high force at low speeds or even when stationary, the sizing is not based on power but purely on force, contrary to traditional drives.

The moving part of a linear motor is directly coupled to the machine load, saving space, simplifying machine design, eliminating backlash, and removing potential failure sources such as ballscrew systems, couplings, belts, or other mechanical transmissions. Finally, the bandwidth and the stiffness of the motion system are much higher, giving better positional repeatability and accuracy over unlimited travel at higher speeds.

Given that frameless linear motors do not include a housing, bearings, or feedback device, the machine builder is free to select these additional components in order to best fit the application requirements.

CONTROL OPTION

In order for a linear servo motor to operate properly, it needs to be connected to a motion controller and servo amplifier (sinusoidal or trapezoidal). A feedback device (encoder, resolver) is also needed in order to close the servo position loop. See diagram 1 for operation flow.

Step 1. A program or motion profile will be written on a PC or laptop and downloaded to the motion controller. This program will contain parameters such as speed, acceleration, deceleration, PIDs, desired position, etc…

Step 2. Based on the program parameters, the motion controller will send a +/- 10V reference signal to the servo amplifier.

Step 3. The servo amplifier will take the reference input signal and provide the necessary current to generate the required force from the motor to move to the desired position.

Step 4. The motor will move to the desired position at the programmed speed and acceleration.

Step 5: Motor position is sent back to the controller (typically 500 times per second) to verify that the desired position has been reached and maintained.

RETURNS POLICY

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SHIPPING

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Q. What is a duty cycle?
A. Duty cycle is defined as (time on) / (time on + time off) per cycle. A lower duty cycle allows the motor to be run with as much as three times its continuous current rating for a short time period to produce higher forces than if the motor runs continuously.

Q. Do standard rotary motor electronics work with linear motors?
A. Lorderan' linear motors are designed to operate with most off-the-shelf controls and drives. Basically, linear motors use the same electric circuit as rotary motors. This applies to stepper, brush and brushless, and AC linear motors alike.

Q. Can a linear motor be mounted vertically or horizontally?
A. Yes. A linear motor provides the same performance when mounted vertically, upside down, or horizontally. However, a vertically-mounted linear motors must be counterbalanced.

Q. Can more than one stepper motor forcer be mounted on a stepper motor platen?
A. Yes, multiple forcers that move independently may be mounted on one platen, as long as they do not physically interfere with each other.

Q. Can more than one brushless linear motor moving coil (primary) assembly be used with a single magnet assembly (secondary)?
A. Yes, more than one coil assembly can be used in conjunction with a single magnet assembly as long as the coil assemblies do not physically interfere with each other.

Q. Does Lorderan make speciality motors for waterproof, vacuum, or clean room environments?
A. Yes, linear motors can be built for a variety of operating environments. To determine if a linear motors is suitable for a specific application, an applications engineer must review the application specifications.

Q. What types of linear motors does Lorderan make?
A. We offer of the broadest lines of linear motors in the industry, so customers are assured they get the best linear motor solution for their application. Our product line includes single-, and dual-axis linear steppers, single- and double-sided linear brushless and brush motors, non-commutated DC motors, enclosed positioning stages, single and cross roller bearing positioning stages, AC linear induction motors, polynoid linear actuators and position verification sensors. Also, new concepts in linear motion technology are continuously being introduced.

Q. Does Lorderan make solenoids?
A. Lorderan makes a polynoid AC linear motor and a non-commutated DC linear motor, both of which are similar to solenoids. The polynoid provides long stroke with constant force is both directions. (With a solenoid, force is only applied in one direction). Travels are only limited by end stops on the support rod. The non-commutated DC linear motor provides short stroke, up to 5 inches, with constant force in both directions.

Q. What are the advantages of a moving magnet actuator over a solenoid?
A. A moving magnet actuator is a DC motor which can be operated as a servo. This allows the device to move with extreme accuracy to any position throughout its entire stroke. The moving magnet actuator is well-suited for short stroke applications.

Q. What are the advantages of a linear motor over a lead screw?
A. The advantages of linear motors include higher velocities [>80 in/sec (>2 m/s)], non-wear moving part, free movement when power is off, no backlash because there are no mechanical linkages.

Q. What are the minimum and maximum sizes of linear motors?
A. Lorderan' linear motors are available in a variety of shapes and sizes beginning with 1/4" diameter. If a standard motor won't meet a customer's specific requirements, a custom motor can be built for the application.

Q. What type of feedback devices are available?
A. Feedback devices are not included with standard motors. However, a position verification sensor is offered for single and dual axis linear stepper motors and optical encoders are offered for closed-loop positioning systems.

Q. What happens if the system loses power of velocity feedback?
A. If a power loss occurs, the system loses all stiffness. So, if the payload is moving, it will continue to move until it hits a stop or until friction brings it to a stop. If the system is already stopped, it will not be affected. If the feedback loop is lost, it may lead to a runaway situation. This condition can be avoided with the use of soft and hard stops as well as braking systems.

Q. Do magnets ever lose their magnetism over time?
A. Lorderan' linear motors use rare earth magnets, which maintain their strength over time. However, when operating at high temperatures (>150°C), rare earth magnets can lose strength.

Q. What is cogging?
A. Cogging is a tendency of some linear motors to move in discrete distances rather than infinitely variable distances. The effect is a result of varying magnetic forces along the length of the motor.

Q. Does Lorderan offer full motion control solutions?
A. Yes, Lorderan can provide you with a full motion control solution including motor, bearing, amplifier, and motion controller.
Linear Motor Tracks Parts, U-Channel Magnetic Motor Assemblies
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