Danaher Motion ACOMEL K 4000, User Manual, Page: 35 / 48

Menu B – Section 2 : Motor related parameters (cont…)
Display Description
FCC duration
(s) = DC braking current duration. This function, when activated, is
automatically initiated after a STOP command, when the DC bus
reaches 10% (
≤
35 V).
FCC current
IFCC(A) =
Value of the DC injected braking current. IFCC should not be
higher than the nominal current of the motor.
Permanent
current
IFCP(A) =
Value of the permanent injected DC braking current. This function
is used when the motor needs to be braked (holding torque) at
standstill, for example to keep air bearing spindle from rotating at
stop. We suggest setting this current not higher than 20% of the
motor nominal current.
Low freq.
smoothing = Low frequency smoothing. Some standard motors may show
stability problems at low frequency, particularly around 30 Hz. The
stability can be improved by setting here a smoothing factor, value
between
0 and 250 .
Slip
compensation = The torque of a synchronous motor is generated by the slip, i.e. the
speed difference between the rotor and the rotating field in the
stator. This slip increase with the load, consequently the speed will
drop. The correct setting of this factor, a value between
0 and 254 ,
will compensate the speed reduction due to the load and keep the
speed close to constant. The correct factor will be found by
measuring the speed under load and increasing the factor until the
speed remains constant.
Factor
254 correspond to 10% compensation for I
m
= I
REF ,
if I
m
= 0.5*I
REF ,
the compensation will be 5%.
U
S
/F
S
Pt. 1 (V/Hz)
U
S
= F
S
=
Enter the U/F characteristic. Start point 0V/0Hz is already stored.
For input information, see page 27
To complete and close the input of one partition or group of
parameters, you must, after having confirmed the last point of
the U
S
/F
S
, key in “2ndF” followed by “ENTER”. If not, your last
input will be lost.
S476-gb-0348 User Manual K4000 Page 35 / 48