5-155
5-6-15 E-Cam Function Description
Traditional mechanical Cam needs go through special processing to achieve the required cam
curve. Whenever an procedure adjustment is required, the user has to change to the corresponding
mechanical cam and this can result in the problem and inconvenience of correction. The idea of
E-Cam has thus derived. The differences, advantages and disadvantages of mechanical cam and
E-Cam are listed in the following table.
Type Mechanical cam E-Cam
Planning
The longer the travel is, the larger the cam is
and more difficult
Software automatic correction
Accuracy Precise command under stable environment Consider servo delay error
Precision Differs from actual processing Software automatic correction
Convenience Main axle must exist and cannot be left out
Main axle can be left out under
constant speed
The idea of E-Cam derives from the need to replace the traditional cam to plan master and slave.
The position relationship between master and slave is planned by software to realize the status as if
there is a virtual cam between master and slave. Two major functions of E-Cam planning: including
“flying shear” and “rotary cut”.
Flying shear function description
Flying shear diagram
Set flying shear to 1 by ECA01 and Cn001=6 (internal position control) to plan flying shear
function. The user can plan according to actual disc distribution and select virtual main axle
(automatic planning) or physical main axle (feeding axle feedback planning) by ECA02.0 (feedback
source selection) for setting. If the user chooses the physical main axle (feeding axle feedback
planning) to set, the main axle encoder feedback must be connected to CN8 slot. When E-Cam
function and feedback source selection are determined, the user can start setting the associated
parameters of master and slave as follows:
Feeding direction
Feeding axle
Cutting axle
Feedin
axle encoder
feedback
Cutting axle encoder feedback
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