Lenze DSD - Manual (Page 156)

7 Applications
7.14 Synchronous drive - single roll
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Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23
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7.14 Synchronous drive - single roll
Synchronous drives are part of the production process of continuous material which is produced or
refined at a high speed. At the starting and end point of these systems they are often combined with
winding drives. Alternatively also cross cutters and flying saws can separate the material at the end
of a production line and thus provide the transition from continuous production to a quickly clocked
job production. In production lines the synchronous drives are the most important drives, since they
control the material flow and therefore the machining process.
The individual rolls can be equipped with single drives and can be mechanically coupled. Apart from
factors resulting from fixed mechanical conditions, the torque to be transmitted basically depends
on the friction coefficient between the material and roll surface. In application cases where the fric-
tion coefficient can be strongly reduced, e. g. due to pollution, corresponding measures like an anti-
spin control within the control structure are to be provided to avoid slip between the circumferen-
tial roller speed and the web.
In order to be able to couple high tensile forces into the web, usually roll arrangements with great
angles of wrap in the form of S- or omega rolls are designed.
Application examples
• Production, refinement of paper or film webs
• Production and refinement of textile webs
• Rolling of slabs, plates
• Rolling, annealing, and refinement of metal plates
• Wire drawing machines
• Printing of paper or film webs, textiles