HEIDENHAIN iTNC 530 HSCI - Additional FN Functions

1224 HEIDENHAIN Technical Manual iTNC 530 HSCI
Additional
FN functions
Further FN 17 functions are available for software option 45 "AFC - Adaptive
Feed Control":
 Definition of reference power. The learning phase can therefore be omitted.
The reference power is specified in percent with respect to the rated power
of the spindle. Example:
FN 17:SYSWRITE ID 622 NR0 IDX 3.0 = 85
 Direct switchover from the learning phase to adaptive feed control.
The prerequisite for this is that a valid reference load has been reached in
the meantime. Example:
FN 17:SYSWRITE ID 622 NR1 IDX 3.0 = 0
 Activating cut-based tool-wear monitoring.
The monitoring limit is specified in percent of the reference power. If the
spindle power exceeds the monitoring limit, the PLC marker M4510 will be
set. In this way, the PLC can initiate the desired reactions, such as setting
the tool life of a tool to "expired". Example:
Monitoring limit at 20% with a reference power of 50%. In this way, 60%
of the rated power output of the spindle is monitored:
FN 17:SYSWRITE ID 622 NR0 IDX 4.0 = 20
 Activating cut-based spindle-load monitoring.
The monitoring limit is specified in percent of the reference power. If the
spindle power exceeds the monitoring limit, an NC stop is triggered.
Monitoring limit at 40% with a reference power of 50%. In this way, the
system monitors for 70% of the rated power output of the spindle:
FN 17:SYSWRITE ID 622 NR0 IDX 5.0 = 20
The PLC can read in word W350 why the NC stop was triggered:
• (W350 = 1 or 2:
NC stop due to falling below the permissible minimum power
• W350 = 3:
NC stop due to detected cutter breakage (FN17 function ID 622 IDX 6.0)
• W350 = 4:
NC stop because the spindle load was exceeded (FN17 function ID 622
IDX 5.0)