Application Examples ASDA Series Application Note
3-26 March, 2015
3.2.3.2 The Meaning of E-cam Curve
The transverse axis of E-cam curve is the pulse number which sent out by master axis. The
vertical axis is the moving distance of ball screw, which is the wrapping length on bobbin. The
tape shall be placed in orderly arrangement on bobbin.
Figure 3.2.8 The meaning of E-cam curve
Use multiple E-cam curves
In this application, the system applies multiple groups of E-cam curve. The tape starts from the
middle of bobbin, when it reaches the endpoint, it stops at the preserved length (The setting of
preserved length is not included in E-cam curve. It is completed by lead pulse). Then, execute
another curve of opposite direction to return to another endpoint. Execute the command
repeatedly until it reached the setting value. The configuration of curve and motion is shown as
Figure 3.2.9 and the time sequence of motion is shown as Figure 3.2.10.
Half
wrapping
length
Wrapping
length
Wrapping
length
The pulse number that
master axis needs for
wrapping 0.5 layer
The pulse number that
master axis needs for
wrapping 1 layer
The pulse number that
master axis needs for
wrapping 1 layer
Figure 3.2.9 Multiple groups of E-cam curve
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