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Modulo positioning
Modulo positioning for clocked rotary motions
Drive application: Modulo positioning
Whenever material is transported, for example, in conveyor
or logistic applications, a large number of motion sequences
must be controlled. These are often linear movements in the
form of hoists, trolleys or conveyor belts, and rotary
movements in the form of rotary tables. The rotary movements
of rotary tables or rotary distributors, for example, are
frequently clocked. Conveyor belts, so-called timing belts,
also represent clocked applications.
Rotary tables are a specific drive application. The material
is always clocked one specified angle further for further
processing. Typically, the movement is only performed in one
direction. Rotary distributors are another application. In
this case, the material is distributed among different
positions. Distance-optimized positioning is often required.
The new position is always reached using the shortest route.
The clocked conveyor belt application is similar to the
rotary table. The material on the conveyor belt is always
clocked one specified length further. A complete conveyor
belt cycle corresponds to a 360° movement of a rotary
table.
The solution with MOVIDRIVE®
Set parameters instead of programming
The drive solution with MOVIDRIVE® is based on
the “Modulo Positioning” application module. The
“Modulo Positioning” application module is part of the
MOVITOOLS® MotionStudio software for MOVIDRIVE®
and can be accessed as soon as the license is purchased. The
user-friendly interface guides you through the process of
setting the parameters. Only those parameters required for
the specific application, such as positions, ramps and
speeds, must be entered. The application module uses this
information to create the control program and loads it into
the inverter. MOVIDRIVE® assumes complete
movement control, thus freeing up the machine control. You
have the option of selecting whether the inverter is
controlled by binary input or by fieldbus.
Wide range of functions
No matter how large the variety of applications, the wide
range of functions provided by the "Modulo
Positioning" application module offers the right
solution for every task.
- 16 target positions or step widths can be defined and
selected. Control using the fieldbus also allows you to
define target positions and step widths as variable
values.
- For each of the 16 target positions or step widths,
you can set the travel speed and ramp separately.
- The angle error can be corrected with flying
referencing when the gear unit reduction ratio is an odd
number.
- For a non-positive (= with slip) connection between
the motor shaft and application, an external incremental
encoder can be referenced.
- The application units can be defined as required.
- Automatic calculation of position resolution and
graphical position display.
- Guided, easy-to-follow startup procedure and
diagnostics.
Movement control with IPOSplus®
One of the main MOVIDRIVE® features used in the
application modules is IPOSplus® positioning and
sequence control. Based on the specifications, an IPOSplus®
program in MOVIDRIVE® controls the entire
motion sequence through the application module as
machine-oriented as possible in MOVIDRIVE®.
Further applications
In addition to rotary tables, rotary distributors and timing
belts, the "Modulo Positioning" application module
can naturally be used for further applications. Examples
are:
The advantages at a glance
- Wide range of functions
- User-friendly user interface
- You only have to enter the parameters needed for the
application
- Guided parameter setting process instead of
complicated programming
- No programming experience required
- Rapid familiarization with the system
- Either terminal control or fieldbus control
- Movement control is carried out completely by the
IPOSplus® program in MOVIDRIVE®
- Decentralized concepts can be implemented more easily
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