Chapter 7 Motion Control Functions
Please refer to the table below to know the differences between a machine cam (physical cam)
and an electronic cam (virtual cam).
Machine Cam (Physical Cam) Electronic Cam
Structure
Return to the original position
after one rotation.
After E-Cam rotates 360 degrees (one
revolution), it can return to the original
position and also can display by spiral
form like mosquito coil incense.
Smooth
Performance
Determined by actual process
precision
Three curves can be interpolated
between two positions upon software.
Position
Accuracy
The position accuracy is very
precise (under the condition of
no vibration)
The position accuracy is very precise,
but the actual motor position will be a
little deviated due to the delay time.
Long Distance
Motion
When the motion distance is
longer, the system needs bigger
machine cam. Making a big
machine cam is not easy.
Only need to change the values of E-
Cam curve. It is applicable for the
application of long motion distance.
If master axis
can be
eliminated
Master axis can not be
eliminated
Master axis can be eliminated for
constant speed motion application.
Users can use the signals that
generated by the servo drive.
Replacement
Need of replacement or repair.
It will cost money.
No need of replacement or repair. Users
only need to reset the parameter
settings.
Maintenance
Machine will wear. Maintenance
is necessary.
Maintenance is not necessary.
Other
Mater axis will occupy the space
and consume the power.
Space and energy saving. Good for
environmental protection.
Revision January 2011 7-29
Call 1(800)985-6929 for Sales
Call 1(800)985-6929 for Sales
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