Fagor DDS Series, Hardware Manual

Page: 209 / 406

   Selection criteria
5.
Ref.1912
· 209 ·
DDS
HARDWARE
The power required in this case P
F
is calculated as follows:
Power needed to accelerate and decelerate an asynchronous
spindle motor
There are three methods to control the acceleration and deceleration
process of the machine spindle:

Acceleration limited by time.
 Different acceleration ramps depending on the speed reached.
F. H5/7
Frictional load. Required power.
µ
Friction coefficiente

Mechanical efficiency
m
L
Table mass in kg
V
Linear speed in m/min
F. H5/8
Acceleration limited by time.
T. H5/2 Acceleration limited by time.
Method
Acceleration limited by time.
Control
Speed increases linearly in time until the command speed is
reached.
Comment
The acceleration torque is constant.
F. H5/9
Different accelerations depending on speed.
T. H5/3 Different accelerations depending on speed.
Method
Different accelerations depending on speed
Control
Linear acceleration avoiding abrupt variations in transmitted
torque.
Comment
Emulation of the square sine function for speed by using ramps.
Load
Motor
Speed
P
F

·m
L
·V
6120·

=
(kW)
adjust
time
0
Ta
speed
adjust
time
0
Ta
speed