HEIDENHAIN iTNC 530 HSCI - Adjusting Linear and Torque Motors

1138 HEIDENHAIN Technical Manual iTNC 530 HSCI
Adjusting linear
and torque motors
 First determine the oscillation frequencies and adjust the filters (see "Setting
the filters in the speed controller" on page 1134).
 To adjust linear and torque motors, activate the Optimization/Linear
motor adjustment function in TNCopt.
This makes it possible to automatically find the controller parameters in the
sequence P factor, k
V
factor, I factor (also see the TNCopt User's Manual). An
NC program must be started in which the motor is moved back and forth.
Because inhomogeneity of magnets, changing the air gap, and other factors
can cause linear motors to oscillate more strongly at certain positions,
HEIDENHAIN recommends adjusting the motor over a large range of traverse
(approx. 300 mm to 500 mm).
During adjustment, TNCopt automatically increases the newly adjusted
controller factor after each reversal point until it detects an oscillation limit. The
respective current value is displayed in TNCopt. Usually you can already hear
the oscillation limit being reached. In this case the oscillation limit is set per
command button (see the TNCopt User's Manual). The factors are reduced
after detection of the oscillation limit. Then they are considered to be
optimized values.
Particularly the optimization of the I factor often results in very low frequency
oscillations that the controller does not recognize as oscillations. Here the
oscillation limit must be set by command button.
 Move the axis back and forth.
The P factor, k
V
factor or I factor is automatically increased by 10 % of the
current value.
 As soon as you hear an oscillation in the axis (also visible on the iTNC's
oscilloscope with I noml), set the oscillation limit via command button (see
the TNCopt User's Manual).
The determined P factor, k
V
factor or I factor is reduced and assumed.
TNCopt automatically switches to finding the next factor.
 Also repeat the finding of the k
V
factor and I factor.
The P, I and k
V
factors were found.
 Enter the determined values at the control in MP2500.x, MP2510.x and
MP1510.x.