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Electronic cam
Electronic cam for complex, cyclical motion sequences
Drive application: Electronic cam
In the past, mechanical cam disks were always used for
harmonizing complex movement sequences in cyclical
machinery.
With this method, a centrally driven shaft, the bevel-gear
shaft, ensured synchronous operation of all cam disks. The
speed of this bevel-gear shaft could determine the
production speed of the machine. However, this mechanical
solution is very inflexible and can no longer cope with the
requirements of modern production and processing machines.
As a result, mechanical cam discs in system and mechanical
engineering are increasingly being replaced by
electronically controlled drives called electronic cams.
Electronic cam applications can be found in the following
sectors:
The figure displays a typical example of electronic cam
application. Freshly filled yogurt pots at the end of a
conveyor belt are transferred to an adjacent conveyor belt
for further processing. The tines of the rake are inserted
between the yogurt pots, lifting and transferring them. The
electronic cam can be used to realize a motion sequence
ensuring that the pots are lifted smoothly.
The solution with MOVIDRIVE®
Separate unit series
The solution for the drive application with MOVIDRIVE®
is based on a special software that is integrated into the
"MOVIDRIVE® drive inverter with electronic
cam" unit series. The entire motion sequence is
controlled in the inverter. External control is not required
for the electronic cam.
Electronic cam editor
A user-friendly cam editor will support you during startup.
Using a movement plan, you define the curve profile of the
slave drive based on various movement types. You also have
the option of importing existing cam data. You can use a
physical drive or a virtual master encoder as the master
drive. You can also set application-specific parameters for
the engagement and disengagement phases of the slave drive
using the cam editor. For example, the slave drive can be
engaged as either event-driven or position-based.
Disengaging can also be event-driven or can occur after a
predefined number of cycles.
Optimize curve profile
After you have created the curve, you can represent the
three derivations speed, acceleration, and jerkiness. You
can thus use your PC to optimize the curve profile for
smooth running.
Curve point table
The curve editor generates the curve point table based on
the curve profile. This curve point table is the basis for
the dependence of master and slave drives. You can also
import an existing curve profile in the form of a curve
point table.
Movement control with IPOSplus®
A significant feature of the MOVIDRIVE® drive
inverters that comes into play with the electronic cam is
the integrated IPOSplus® positioning and
sequence control system. An IPOSplus® program in
MOVIDRIVE® controls the entire motion sequence
in MOVIDRIVE® as machine-oriented as possible.
In addition, further system-specific functions can be
controlled with this IPOSplus® program.
The advantages at a glance
- Wide range of functions
- High system flexibility
- User-friendly electronic cam editor
- Import option for curve data
- Optimization of smooth running, maximum acceleration
and oscillation tilt
- Monitor mode for optimum diagnostics
- Virtual encoder can be used as the master encoder
- Either terminal control or fieldbus control
- Units can be linked with the existing standard system
bus
- All movement control is carried out by the IPOSplus®
program in MOVIDRIVE®
- Decentralized concepts can be implemented more easily
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