Delta ASDA-A3 Series User Manual page 306

ASDA-A3
To avoid drastic speed change during operation, when plotting the system, take the arc length
between cutter ends, cutting length, and the synchronous speed zone into consideration.
The synchronous speed zone is fixed based on the machining requirements for the materials;
whereas the cutting length is determined by the acceleration and deceleration zones. Therefore,
in addition to the cutter diameter, the cutter number can determine the speed and alleviate the
speed variation caused by the acceleration or deceleration of the motor, which makes the system
operation smoother. You can also use a lower power motor to have a more cost-effective servo
system.
Create an E-Cam curve
You can plot the E-Cam curve for the rotary shear system through ASDA-Soft or macros of the
servo drive. There are four methods to create E-Cam curves for rotary shear applications.
[Rotary Shear - W/O Sync. Zone], [Rotary Shear - Fixed Sync. zone], and [Rotary Shear -
Adjustable Sync. Zone] are designed for common rotary shear applications. The differences
among the three are whether there is a synchronous speed zone and whether this zone is
adjustable. [Rotary Shear - Printing Machine] is specially designed for creating curves for printing
machines. Two macros provided by the servo drive are available for creating E-Cam curves.
Macro #6 can create E-Cam curves with fixed synchronous speed zone and Macro #7 can create
E-Cam curves with adjustable synchronous speed zone for rotary shear applications. The required
setting parameters and the rotary shear mechanical structure are shown in Figure 7.3.7.7.
N: pulse number per encoder revolution
A: gear teeth number of the motor; B: gear teeth number of the cutter
L: cutting length; C: number of cutters
d1: cutter diameter; d2: encoder diameter
Figure 7.3.7.7 Mechanical structure of rotary shear
Motion Control
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