HEIDENHAIN iTNC 530 HSCI - The Three Files of Adaptive Feed Control

1226 HEIDENHAIN Technical Manual iTNC 530 HSCI
The three files of adaptive feed control:
File of the global control parameters: AFC.TAB
In the AFC.TAB table, which must be saved in the TNC:\ root directory, you
enter the basic control settings with which the TNC is to perform the feed-rate
control.
The data in this table are default values that are copied during the teach-in cut
to the file associated with the respective machining program, where they
serve as the basis for controlling.
Control parameters for the subsequent standard control strategy are already
saved there. Other settings can be programmed as desired.
The static control parameters that must be programmed in AFC.TAB for each
cutting-data set are:
Column Function
NR Consecutive line number in the table (has no further functions)
AFC Name of the control strategy. You must enter this name in the
AFC column of the tool table. It specifies the assignment of
control parameters to the tool.
FMIN Minimum feed rate at which the TNC is to perform an overload
reaction if the feed rate falls below this value for one second.
Enter the value in percent of the programmed feed rate.
FMAX Maximum feed rate in the material up to which the TNC can
automatically increase the feed rate. Enter the value in percent
of the programmed feed rate.
FIDL Feed rate for traverse when the tool is not cutting (feed rate in
the air). Enter the value in percent of the programmed feed rate.
FENT Feed rate for traverse when the tool moves into or out of the
material. Enter the value in percent of the programmed feed
rate.
OVLD Desired reaction of the iTNC to overload:
 M: Perform an NC-function macro defined by the OEM
 S: Immediately perform an NC stop
 F: Perform an NC stop once the tool has retracted
 E: Only display an error message on the screen
 –: Do not perform an overload reaction
The iTNC conducts a shutdown response if the maximum
spindle power is exceeded for more than one second and at the
same time the feed rate falls below the minimum you defined.
POUT Spindle power at which the TNC is to detect tool exit from the
workpiece. Enter the value in percent of the learned reference
load. Recommended input value: 8%
SENS Sensitivity (aggressiveness) of regulation. A value between 50
and 200 can be entered. 50 is for slow control, 200 for a very
aggressive control. An aggressive control reacts quickly and
with strong changes to the values, but it tends to overshoot.
Recommended value: 100