mag spring magnetic springs

8/10/2019 Mag Spring Magnetic Springs

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MagSpring, unlike mechanicalsprings, deliver a constant forceover their entire working rang

MagSpring, consists of only twocomponents: a stator and a slider

MagSprings are totally passive.Their operation is based entirely on a uniqueapplication of permanent magnets no electricity at all.

The constant force spring technology for industrial applications

MagSprin g Magnetic Sprin gs


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Slider

NeodymiumMagnet

Bearing

StatorNeodymiumMagnet

Magnet ic Spring MagSpring

MagSpring products can best be described as"magnetic springs." The term "spring", how-ever, is to be understood to mean that Mag-Spring components generate a constant forceover their entire working range, while the char-acteristic curve for a typical mechanical springshows an increase in force with increasing dis-placement (see Fig. Right). The generation offorce that is independent of the stroke makesMagSprings preferable for balancing weightforces in vertical drive applications. MagSpringproducts can best be described as "magnetic-Since MagSprings are purely passive ele-ments, a defined function or position of a de-vice can be ensured in a power-off condition.

For example, a gripper or press head on a ver-tical mount can be held up, or a slider can bepushed in or pulled out with a constant force.

Mode of Operation

The mode of operation is based on the attrac-tive force of permanent magnets. Accordingly,no energy source (electricity, compressed air,etc.) is needed, so that safety-related applica-tions can also be addressed. The special de-sign of the flow-guiding components and themagnets translates the strongly non-linearrelationship between force and displacementin magnet-iron arrangements into a constantforce curve. Depending on the strength classof the MagSpring, the peurmanent magnetsare either in the stator, in the slider, or in bothcomponents. The slider is guided by an inte-grated plain bearing, so that MagSprings canbe used comparably to gas pressure springs ina design.


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Application of Constant Force

Thanks to the constant force-displacement curve,many other applications are possible, such as thegeneration of a constant

press force, regardless of position; application ofa constant holding force across a large strokerange; or single-sided force support in drive ap-plications.

The effective force is in the range of +/- 10% ofthe nominal force, due to material and manufac-turing tolerances.

FMagSpring

FMagSpring

Mechanical Spring

Stroke

Stroke

FSpring

Force

Force

Holding Function(Power-off)

Since MagSprings arepurely passive elements, adefined function or position

of a device can be en-sured in a power-off condi-tion. For example, a grip-per or press head on avertical mount can be heldup, or a slider can bepushed in or pulled outwith a constant force.

Working Range

In the relaxed state, the slider is ap-proximately centered in the stator, whilethe working end of the slider extends

somewhat out of the end of the stator.(Fundamentally, however, both ends ofthe slider can be used to mount loads.)From this rest position, the slider can bepulled or pushed out of the stator in bothdirections. The force increases fromzero to the nominal force within a shortstroke length. The working stroke thencontinues with a constant force. Thestart position (SP) describes the dis-tance between the working end of theslider and the end of the stator at thebeginning of the constant force range.

FMagSpring


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M01-20x60/50: Force 11-22N / Stroke 50mm



The MagSpring has a constant force, as soon as the slider has been pulled out or pushed by the distance SP.

The distance SP is measured between the unmarked slider end and the end of the stator (threaded end).

50mm stroke withconstant force

Dimensions in mm

Constant force [N] Stator mass [g (lb)] Slider mass [g (lb)]



130mm stroke with constant force

Dimensions in mm





Dimensions in mm


MS01-20 Fam ily


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Dimensions in mm


Ordering Information

MagSpring Stator 20x60mm

Slider for MagSpring M01-20x60/50, Force 11N



Stator

Slider

MagSpring M01-20 with 50mm stroke





Stator

Slider


Stator

Slider

Stator

Slider





MagSpring M01-20 with 210 mm stroke

MagSpring Stator 20x140mm 0250-2207

Slider for MagSpring M01-20x300/290, Force 11N 0250-2311Slider for MagSpring M01-20x300/290, Force 17N 0250-2312

Slider for MagSpring M01-20x300/290, Force 22N 0250-2313


MS01-20 Fam ily


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50mm stroke withconstant force

Dimensions in mm


125mm stroke with constant forceDimensions in mm





Dimensions in mm




MS01-37 Fam ily


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Dimensions in mm


Ordering Information





Stator

Slider




Slider for MagSpring M01-37x155/125, Force 50NSlider for MagSpring M01-37x155/125, Force 60N

Stator

Slider


Stator

Slider

Stator

Slider





MagSprings M01-37 with 200mm stroke





MagSprings M01-37 with 275mm stroke

MS01-37 Fam ily


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Flange and Adaptor for MagSpring

Material: Aluminum (AlMgSi), black anodizedMass: approx. 30g (0.066lb)

Dimensions in mm

Item Description Part Number

Flange MagSpring M01-20 - fits guides H01-23

Flange for MagSpring M01-20

Flange for MagSpring M01-37


Dimensions in mm


Flange MagSpring M01-20 - fits guides H01-37 and B01-37

- fits guides H01-48 and B01-48

Flanges


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Adaptor MagSpring M01-20 / Guides H01-23

Adaptor for MagSpring M01-20 and Guides H01-23


Dimensions in mm


Adaptor MagSpring M01-37 / Guides H01-37 and B01-37

Adaptor for MagSpring M01-37 and Guides H01-37 / B01-37


Dimensions in mm


Adaptor MagSpring M01-37 / Guides H01-48 and B01-48

Adaptor for MagSpring M01-37 and Guides H01-48 / B01-48


Dimensions in mm

Adapters


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Mount ing

Mounting flanges and adapters are availablefor mounting MagSpring magnetic springs. Us-

ing these accessories, the magnetic springscan be mounted directly on an H01 linear guideor a B01 bridge guide.

The flange for mounting the MagSpring statorsis secured with T-nuts in the T-slot provided forthis purpose on the linear or bridge guide.

For weight balancing in vertical installations,the lower slider end of the MagSpring is at-tached to the guide shaft of the guide using theadapter.

Depending on the installation orientation of theguide, the adapter is attached to the guideshaft at the front mounting plate (motor on top)or the rear end of the guide shaft (motor on thebottom).

Motor on the top Motor on the bottom

AdapterMA01

FlangeMF01


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Materials

Slider:Chromium-Nickel Steel 1.4301

Stator:Iron, electroless nickel plated

Bearing:POM based

Mounting

The stators can bemounted via the screwthread, or with a clamp,as desired. There areappropriate mountingflanges for both sizes.When attaching theslider to the load mass,care should be taken that any parallelismerrors are compensated for with a flexiblecoupler.

Combination with H-Guides

The illustration to the right shows a vertical ar-

rangement of an H01 linear guide together witha MagSpring. The MagSpring presses upwardwith a constant force. The weight load is bal-anced by the MagSpring, and the linear motorthus bears less load.

If the electrical power supply is interrupted, theMagSpring supports the load, or moves it into asafe waiting position.


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NTI AG

Haerdlistrasse 15CH - 8957 SpreitenbachTel.: +41-(0)56-419 91 91Fax: +41-(0)56-419 91 92E-Mail: [email protected]

Web: www.linmot.com

LinMot, Inc.

5750 Townline RoadElkhorn, WI 53121Tel.: 877-546-3270Fax: 800-463-8708E-Mail: [email protected]

Web: www.linmot-usa.com

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