LINEAR MOTORS IN PARALLEL SYSTEMS Who we are Dynetics, founded in - - PowerPoint PPT Presentation

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LINEAR MOTORS IN PARALLEL SYSTEMS Who we are Dynetics, founded in - - PowerPoint PPT Presentation

Dec 25, 2022 361 likes •770 views

LINEAR MOTORS IN PARALLEL SYSTEMS Who we are Dynetics, founded in 1994, with offices in Germany and the Netherlands assist engineers in selecting the best suitable motor for their mechatronical assignment. Dynetics represents leading

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LINEAR MOTORS IN PARALLEL SYSTEMS

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SLIDE 2

Who we are

Dynetics, founded in 1994, with offices in Germany and the Netherlands assist engineers in selecting the best suitable motor for their mechatronical assignment. Dynetics represents leading manufacturers such as Nidec Servo, Tsukasa, Shinano Kenshi, NPM, Mellor Electrics and offers a wide range of small motors up to 150 Watt with various technologies. Dynetics helps economizing your design by offering solutions with optimum price-performance ratio. For stepping motors we offer driver units from Nidec Servo, SHS; from NPM we offer the Motion controller IC‘s. For equipment cooling we offer a variety of axial instrument ventilators and radial blowers from leading manufacturers such as Nidec Servo, and Royal electric. Many of our motors can be „customized“with double or modified shafts, encoders, different windings, etc. All fans and motors can be fitted with connectors per customer request.

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Dynetics is located near the High Tech Campus Eindhoven and has a perfect location at the heart of Europe’s leading R&D region. The Eindhoven, Louvain, Aachen triangle (ELAt) is an area that has acquired a strong European position in micro-electronics/nano-electronics and life sciences.

In an area of just one square kilometre, more than 8,000 researchers, developers and entrepreneurs work closely together developing the technologies and products of tomorrow.

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SLIDE 4

Who we are

Dynetics can devide the product specialism in 6 groups:

  • 1. Stepping motors
  • 2. Linear motors
  • 3. Brushless DC- motors (with or without gear head)
  • 4. Brush motors (with or without gear head)
  • 5. Fans & blowers
  • 6. Customized solutions
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SLIDE 5

Who we are

Nippon Pulse's family of Linear Shaft Motors are the next generation linear brushless motor. When reliability, zero maintenance, zero cogging, and precision are paramount, the Linear Shaft Motors from Nippon Pulse are an ideal component choice, offering the user uncompromised performance, ease of use, compact package size, and high value

Linear motors

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SLIDE 6

From Nippon Pulse

Linear Motors in Parallel

Booth 4-490

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Parallel Motor Example

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SLIDE 8
  • Pick and place
  • Glass cutters
  • Laser engraving
  • Sealant applicators

Linear Motor Parallel Applications

Cartesian/gantry robots

Linear Motion Applications

http://www.fisnar.com/robots_f9800n http://www.greller.com/ http://www.auto-alt.com/index.php http://www.technocnc.com/cnc-router-systems/lc-series-cnc-router.htm

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SLIDE 9

Linear Motor Parallel Applications

High Force

  • Material testing
  • Punches

Linear Motion Applications

http://www.ecvv.com/product/513821.html

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SLIDE 10

Linear Motor Parallel Applications

High Precision/Accuracy

  • Microscopes
  • Optics
  • Semiconductor

Linear Motion Applications

http://www.illumina.com/index.ilmn http://huron-technologies.com/products/tissuescope.html

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SLIDE 11

How Do We Do It Today?

Motion Options

  • Ball Screws
  • Belt Drives
  • Linear Motors

Linear Motion Options

Linear Linear Motor

  • tor

Belt Belt Driv Drive Ball Ball Scr crew ew

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SLIDE 12
  • Issues with parallel drive systems

– Orthoganality/squaring issues – Flatness – Sine errors

  • Linear Shaft Motor overview
  • Why the Linear Shaft Motor excels in

parallel systems

Overview

Overview

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SLIDE 13

Traditional Linear Motors

Issue:

  • Keeping orthoganality/square

alignment between parallel drive systems.

  • Impacts ball screws (binding),

electric linear motor, belt drive Perfectly parallel Partially skewed (alignment error)

Alignment Issues in Parallel Linear Systems

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SLIDE 14

Traditional Linear Motors

Issue:

  • Binding
  • Straightness Error
  • Yaw error
  • Impacts ball screws (binding),

electric linear motor, belt drive Perfectly parallel Partially skewed (alignment error)

Alignment Issues in Parallel Linear Systems

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SLIDE 15

Traditional Linear Motors

Issue:

  • Sine error, force difference caused by

misalignment of coils/magnetic tracks

  • The parallel drives are not properly

tracking together

  • Appear in electric motors

Alignment Errors in Parallel Linear Systems

Sine Error Equation

Fdif – Force difference between the two coils Fgen – Force generated Ddif – Length of misalignment MPn-n – North to North Magnetic pitch

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SLIDE 16

Traditional Linear Motors

Issue:

  • Mechanical linkage; errors in chain

drives are the mechanical equivalent of sine error

  • Occurs in non-electric motors

Alignment Errors in Parallel Linear Systems

http://cfnewsads.thomasnet.com/images/large/007/7281.jpg

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Traditional Linear Motors

Issue:

  • Ensuring the flatness, on each side and relative to each other, of the parallel

drive systems

  • Impacts electric linear motors, ball-screws

Flatness Issues in Parallel Linear Systems

Image courtesy of IBEX Engineering

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SLIDE 18

Traditional Linear Motors

Flatness Issues in Parallel Linear Systems

High Force Low Force

Large Gap Small Gap Optimal Point

Issue:

  • Lack of flatness results in

variation in magnet/coil gap

  • Large gap results in lower

force

  • Small gap results in high

force but increases binding potential

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SLIDE 19

Traditional Linear Motors

Solution:

  • Drive/control each motor

independently while electronically synched; expensive option considering cost of multiple sets of electronics

Solution to Alignment/Flatness Issues

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SLIDE 20

Simple

Läufer Magnete Spulen Stator

Two Parts

  • 1. Forcer ~ Coils
  • 2. Shaft ~ Magnets

Linear Shaft Motor

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Simple Non-contact

  • Large Air Gap

0.5mm to 5.0mm nominal annular air gap (1 to 10mm total)

  • Non-critical

No variation in force as gap varies over stroke of device

Linear Shaft Motor

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SLIDE 22

22

Coil Magnetic Flux (a) Flat type Ineffective use of flux (b) Cylindrical type Effective use of flux

Only upper side flux is effective All flux is effective

Magnets Coil

Linear Shaft Motor

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SLIDE 23

High Precision Non-contact Simple

  • First linear motor

designed for Ultra-High Precision market

Linear Shaft Motor

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Coreless Linear Motor

  • Linear Shaft Motor is shaft type (cylindricality) coreless linear motor.

Simple Design

  • The motor has simple structure with a simple drive principle.

High Responsiveness

  • The linear motor will respond “obediently” to the instruction from driver with very high responsiveness

High Accuracy

  • High responsiveness will achieve high accuracy positioning, low ripple (unevenness) at low speed and

quick positioning at high acceleration and deceleration for high accuracy application.

High Cost Performance

  • The simple structure allows for easy intergation into mass produced devices without sacrificing

performance.

Easy handling and maintenance

  • Replacing a ball screw is simple since the motor is a shaft type. The motor is supported at both ends so

there is no concern about flatness during assembly.

  • There is no concern about unevenness of thrust force due to air gap variation.
  • There is no concern about the motor wearing out since it is completely non-contact.

Linear Shaft Motor

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Linear Shaft Motor in Parallel

Issue:

  • Keeping orthoganality/square

alignment between parallel motors Perfectly parallel Partially skewed (alignment error)

Reducing Impact of Alignment Issues

Solution: Non-critical air gap

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SLIDE 26

Linear Shaft Motor in Parallel

Issue:

  • Costly electronics duplicated for

parallel system Perfectly parallel Partially skewed (alignment error)

Reducing Impact of Alignment Issues

Solution: One encoder, one servo drive

  • 1°freedom-of-motion when mechanically

tied together

  • When given same signal, act as one

motor

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SLIDE 27

Linear Shaft Motor in Parallel

Issue:

  • Sine error, force difference caused

by misalignment of coils/magnetic tracks

Reducing Impact of Sine Error

Traditional Linear Motor 30mm N-N pole pitch 1mm misalignment = 21% loss of power Linear Shaft Motor 90mm N-N pole pitch 1mm misalignment = 7% loss of power Sine Error

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SLIDE 28

Traditional Linear Motors

Flatness in Linear Shaft Motor parallel systems:

  • Non-critical air gap reduces impact of flatness issues
  • Allows for greater variance in machining
  • Reduces machining costs

Flatness Issues in Parallel Linear Systems

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Linear Shaft Motor in Parallel

Solution:

  • Linear Shaft Motor allows feedback

and force generation to be at the center

  • f mass for accurate positioning
  • Impossible in other linear systems to

achieve this, require two encoders and two servo drives

  • Forces can be greatly increased

Placing Feedback at the Center of Mass

Encoder

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Linear Shaft Motor in Parallel

4-axis parallel Moving Table

Unlimited Linear Shaft Motors in Parallel

Solution:

  • Because the Linear Shaft Motor needs

just one encoder and one servo drive, number of motors is unlimited

  • Force is multiplied by number of Linear

Shaft Motors in the system

  • System must maintain adequate

stiffness

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Linear Shaft Motor in Parallel

  • A high precision motor, multiple

Linear Shaft Motors can be set up in parallel with relative ease.

  • Multiple Linear Shaft Motors set

up parallel can be run using only

  • ne encoder and one drive.
  • Using multiple Linear Shaft

Motors in a Gantry system will greatly improve force.

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SLIDE 32

G8 TABLE

S500Q 3,3METER STROKE PARALLEL DRIVE

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SLIDE 33

Item Velocity & Acceleration Up to 1,600 mm/s - Up to 0.5G Velocity Stability Velocity = 100mm/s Settling time Condition Velocity : 400mm/s 0.15G ±5um Jitter 20 Seconds Position Difference Velocity : 100 mm/s Acceleration : 0.1G Travel : 1000mm Test Stage : Robostar 8GEN Demo Stage

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Item Yaskawa Velocity 1,600mm/s Maximum Acceleration 0.5G Velocity Stability ±0.21% PTP Move & Settling 400ms Position Difference n/a Jitter at Stop n/a

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Item Trilogy Velocity 1,600mm/s Maximum Acceleration 0.5G Velocity Stability ±0.08% PTP Move & Settling 320ms Position Difference n/a Jitter at Stop n/a

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Item Tecnotion Velocity 1,600mm/s Maximum Acceleration 0,5G Velocity Stability ±0,09% PTP Move & Settling 320ms Position Difference n/a Jitter at Stop n/a

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Item Linear Shaft Motor Velocity 1,600mm/s Maximum Acceleration 0.5G Velocity Stability ±0.06% PTP Move & Settling 280ms Position Difference 1.66um Jitter at Stop 52.3nm

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Item Linear Shaft Motor Velocity 1,600mm/s Maximum Acceleration 0.5G Velocity Stability ±0.06% PTP Move & Settling 280ms Position Difference 1.66um Jitter at Stop 52.3nm

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SLIDE 39

German office: Dutch office: