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Motion Control

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ASDA-A3

7

The application of flying shear is divided into two types according to the clutch engagement

time. The first type is fully engaged. Its E-Cam curve includes the acceleration zone,

synchronous speed zone, deceleration zone, and reset zone. The slave axis is completely

controlled by the E-Cam system. The second type is partially engaged: the E-Cam operation is

triggered by the signal, and the E-Cam curve has no reset zone. After one cycle of E-Cam

operation, the clutch disengages and uses the PR command to reset. Then, the E-Cam waits for

the next trigger signal. As shown in Figure 7.3.8.2 using a cutting machine as an example, the

material feeder is the master axis and the cutting axis is the slave axis. The feeder maintains at

a constant speed, and the cutting axis operates according to the E-Cam curve or PR command.

Acceleration

zone

Reset path

Cutting path

Same speed zone

Deceleration

zone

Cutting axis (slave

axis) path

Cutter starts

Material feeder axis

(master axis) path

Figure 7.3.8.2 Cutting path and operation cycle of the cutting machine

Fully engaged

The fully engaged E-Cam application is suitable for cutting operations without marks. Its E-Cam

curve includes the acceleration zone, synchronous speed zone, deceleration zone, and reset

zone. The master axis operates at a constant speed. The slave axis operates according to the

E-Cam curve and the cutting is complete in the synchronous speed zone. In each cycle, the

slave axis starts from the acceleration zone. To avoid wasting materials in the first cycle, set the

initial lead pulse before engaged (P5.087). The setting value is the total pulse number of the

synchronous speed zone, deceleration zone, and reset zone. If the cutting sensor and material

are not aligned during the first cutting, you need to add the offset pulse number of the sensor.

Cutting point

Cutting length

Cutting point

Cutting length

Cutting point

Sync. speed zone Dec.

zone

Speed curve

(PUU/s)

Reset

zone

Acc. Sync. speed zone Dec.

zone

zone

Reset

zone

Acc.

zone

Position

curve (PUU)

7-132

Delay of first cycle

E-Cam cycle

Sensor offset

Initial lead pulse before engaged

(P5.087)

Figure 7.3.8.3 Fully engaged E-Cam cycle of the cutting machine

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