
33. EXTERNAL DATA INPUT
B–63002EN/01
NC FUNCTION
350
The tool compensation value for the offset number specified in the
program can be externally modified.
The input signal designates whether the input tool offset amount is:
absolute or incremental
geometry offset or tool wear offset
cutter radius compensation amount or tool length compensation
amount
It the machine is equipped with automatic measurement devices of tools
and workpiece, error can be input to the NC with this function.
External tool compensation amount range is:
0 to ±7999
in least command increment.
A program number from 1 - 9999 can be given from outside to the NC to
call the corresponding program from the NC memory.
In machines with automatic loading function of various workpiece, this
function can be used to automatically select and execute program suitable
to the workpiece.
The work coordinate system can be shifted for the shift amount given
from outside.
The shift amount specified by an input signal is set as an external offset
value for workpiece zero points by which the workpiece coordinate
system shifts. The shift amount is an absolute value, not an incremental
value.
The shift amount range is :
0 to ±7999
in least command increment.
The external data input function allows NC operation by data sent from
outside the NC (for example from the machine side).
The machine coordinate system is compensated by shift amount given
from outside. This shift amount always take absolute value; never an
increment value.
The shift amount range is:
0 to ±9999
in detection unit.
When shift amount is input, the actual machine move distance is the
difference between the previous offset amount and current offset amount.
This function is used t compensate the machine coordinate system error
caused by mechanical deformation.
By sending alarm number from outside, the NC is brought to an alarm
status; an alarm message is sent to the NC, and the message is displayed
on the screen of the NC. Reset of alarm status is also done with external
data.
Up to 4 alarm numbers and messages can be sent at a single time. Alarms
0 to 999 can be sent. To distinguish these alarms from other alarms, the
CNC displays them by adding 1000 to each alarm number. The messages
of up to 32 characters can be sent together with an alarm.
33.1
EXTERNAL TOOL
COMPENSATION
33.2
EXTERNAL
PROGRAM NUMBER
SEARCH
33.3
EXTERNAL
WORKPIECE
COORDINATE
SYSTEM SHIFT
33.4
EXTERNAL MACHINE
ZERO POINT SHIFT
33.5
EXTERNAL ALARM
MESSAGE