Lenze DSD - Manual (Page 159)

Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23
159
7 Applications
7.14 Synchronous drive - single roll
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7.14.2.2 Tensile force, infeed
7.14.2.3 Tensile force, outfeed
7.14.2.4 Efficiency, roll mechanics
7.14.2.5 Moment of inertia, rolls/material
Symbol Description
F
in
The tensile force on the material belt at the input side of the roll, i.e. where the material ap-
proaches the roll.
• Only positive values possible.
• The difference in force between the input side and the output side has to be provided by the
drive.
Possible messages
 Ratio of the tensile forces F
in
/ F
out
> limit value ( 441)
 Ratio of the tensile forces F
out
/ F
in
> limit value ( 441)
Symbol Description
F
out
The tensile force on the material belt at the output side of the roll, i.e. where the material moves
away from the roll.
• Only positive values possible.
• The difference in force between the input side and the output side has to be provided by the
drive.
Possible messages
 Ratio of the tensile forces F
in
/ F
out
> limit value ( 441)
 Ratio of the tensile forces F
out
/ F
in
> limit value ( 441)
Symbol Description
η
Brg
Efficiency
• Takes into account the overall mechanical losses, e.g. those resulting from friction between
the material belt and the roller or serrations on the roller.
Symbol Description
J Moment of inertia of the drive roll of the material to be conveyed (if relevant), etc.
• The moment of inertia has an effect on the dynamic torque!
• Value can be entered directly or calculated using the inertial calculator.
Inertial calculator ( 407)