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Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23 167

7Applications

7.15 Synchronous drive of squeegees

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7.15.2.9 Static friction coefficient of roll surface

7.15.2.10 Safety coefficient static friction

Conditions

For a reliable power transmission from the drive roll to the material the following condition has to

be met. Otherwise a warning appears.

7.15.2.11 Velocity

Symbol Description

Static friction coefficient

• The power transmission between roll and material length is effected by friction. The coeffi-

cient of static friction specifies how great the force to be transmitted can be in proportion to

the normal force on the roll.

• Value can be entered directly or selected from the "Physical coefficients" table.

Static friction

Possible messages

Difference of the tensile forces F

- F

out

> limit value ( 441)

Symbol Description

S Safety coefficient

• The differential force |F

-F

out

| always has to be smaller than the Static friction to prevent

slippage. The coefficient S provides for a safety reserve that can be individually adapted to

the application.

Possible messages

Difference of the tensile forces F

- F

out

> limit value ( 441)

out

– F μ

100

---------

–





⋅⋅<

Symbol Description

v Speed of the web

• Value is entered in the Motion dimensioning step.

1 2 ... 162 163 164 165 166 167 168 169 170 171 172 ... 495 496

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