
A-60156E
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Sheet
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Design
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FANUC Series 16
i
/18
i
/21
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– TA/TB
Direct input of offset value measured B
for 2 spindle lathe
Jan.31.02
5/13
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Basic Procedure to Set
Tool Offset Value
The tool offset value is automatically set to the tool offset memory by the
following operation.
The distance between the measured reference position, which is the tool nose
position of the standard tool or the imaginary position , and the tool nose
position of the actual used tool is set as the tool offset value.
(1)
Select the spindle measuring the tool offset by the measured spindle
select signal (G040.5)
(2)
Execute manual reference position return.
By executing manual reference position return, a machine coordinate
system is established.
The tool offset value is computed on the machine
coordinate system.
(3)
Select manual handle mode or manual continuous feed mode and set the
tool compensation value write mode select signal GOQSM to “1”. The
CRT display is automatically changed to the tool offset screen
(geometry), and the “OFST” indicator starts blinking in the status
indication area in the bottom of the screen, which informs that the tool
compensation value writing mode is ready.
Then the measured spindle check signal S1MES (F062.3) or S2MES
(F062.3) is set to “1”.
(4)
Select a tool to be measured.
(5)
Move the cursor to the desired offset number by manual or automatic
operation.
(6)
Near the tool to the sensor by manual operation.
(7)
Place the tool edge to a contacting surface of the sensor by manual
handle feed. Bring the tool edge in contact with the sensor. This causes
the tool compensation value writing signals (+MIT1, –MIT1, +MIT2 or –
MIT2) to input to CNC. The tool compensation value writing signal is
set to “1”, and the :
i) The axis is interlocked in this direction and its feeding is stopped.
ii) The tool offset value extracted by the tool offset memory (tool
geometry offset value) which corresponds to the offset number
shown by the cursor is set up.
(8)
For both X-axis and Z-axis, their offset value are set by the operations
(5) and (6). The offset value is set to X-axis or Z-axis coinciding with the
cursor.
(9)
Repeat operations (4) to (8) for all necessary tools.
(10)
Set the tool compensation value writing mode signal GOQSM to “0”.
i) The writing mode is canceled and the blinking “OFST” indicator
light.
ii) The measured spindle check signal S1MES (F062.3) or S2MES
(F062.4) is set to “0”.
Note
After that, the measured spindle select signal S2TLS (G040.5) cannot be
changed until the tool compensation value write mode select signal GOQSM
(G039.7) is changed to “0”.