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2 - Fagor Automation

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Selection criteria<br />

5.<br />

SELECTING CRITERIA<br />

Asynchronous spindle motor and servo drive selection<br />

232<br />

DDS<br />

HARDWARE<br />

Ref.1307<br />

214<br />

The power required in this case P F is calculated as follows:<br />

Motor<br />

Speed<br />

F. H5/7<br />

Frictional load. Required power.<br />

µ Friction coefficiente Mechanical efficiency<br />

mL Table mass in kg V Linear speed in m/min<br />

Power needed to accelerate and decelerate an asynchronous spindle<br />

motor<br />

There are three methods to control the acceleration and deceleration process<br />

of the machine spindle:<br />

Acceleration limited by time.<br />

F. H5/8<br />

Acceleration limited by time.<br />

Load<br />

T. H5/2 Acceleration limited by time.<br />

Method Acceleration limited by time.<br />

Control Speed increases linearly in time until the command<br />

speed is reached.<br />

Comment The acceleration torque is constant.<br />

Different acceleration ramps depending on the speed reached.<br />

0<br />

Ta<br />

F. H5/9<br />

Different accelerations depending on speed.<br />

0<br />

speed<br />

Ta<br />

speed<br />

·mL ·V<br />

PF = (kW)<br />

6120·<br />

adjust<br />

adjust<br />

time<br />

time

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