Delta D25886 Manual do Utilizador descarregar pdf (Página 197)

4. Motion Control Instruction

4-156 DVP-MC operating manual

4.7.9. Control feature of flying shear function

Flying shear is a kind of special e-cam function. In continuous shearing, the flying shear curve for the first

cycle is shown below.

 Explanation of areas

Acceleration area: After the flying shear relation is established successfully and when master axis runs to

MasterStartPosition, slave axis starts to accelerate from static state and finally slave axis and master keeps

the synchronous speed. The process is named as the Acceleration area.

Sync area: In this area, slave axis and master axis run at the fixed speed ratio (1:1 usually). And the cutting of

material occurs in this area.

Return area: After the Sync area finishes, slave axis starts to decelerate and finally slave axis rotates

reversely to the SlaveWaitPosition and then stops. The process is named as the Return area.

 Steps for flying shear

1. After the flying shear function is started up, slave axis runs to the SlaveWaitPosition and stops there.

2. When master axis runs to the MasterStartPosition, slave starts to chase after master axis and the flying

shear function enters the acceleration area.

3. When the sync area starts, master axis is in the MasterSyncPosition and slave axis is in the

SlaveSyncPosition. Meanwhile, slave axis and master axis keep the synchronous speed and the

synchronous bits of relevant instructions turn on.

4. The shear axis will run according to user program after the sync bit is on

5. When slave axis reaches the SlaveEndPosition, the synchronous area ends and the sync bit is reset.

Meanwhile, slave axis starts to decelerate and the flying shear function enters the return area.

6. In the end, slave rotates reversely to the SlaveWaitPosition.

 Function feature

1. User could set up the cutting length freely according to the technological requirement

2. User could set up the position and length of the sync area freely according to the technological

requirement

3. In sync area, slave axis and master axis run at the fixed speed ratio (speeds are same usually). And the

cutting of material occurs in this area.

4. After the flying shear function is started up, slave axis runs following the phase of the master axis.

Therefore, master axis could move at a constant speed, acceleration, deceleration and irregular speed.

5. After flying shear function ends, slave axis will still return to the SlaveWaitPosition.

Slave axis

Sync area

Master axis

Return area

Acceleration

area

SlaveEndPosition

MasterSyncPosition

MasterStartPosition

CutLength

SlaveSyncPosition

SlaveWaitPosition

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