FANUC Series 16i /18i /21i – TA/TB

Direct input of offset value measured B

for 2 spindle lathe

Contents

1. Outline.................................................................................................................................... 2
2. Touch Sensor ........................................................................................................................ 2
3. Setting of Tool Offset Value .................................................................................................. 3
4. Setting of Z-axis Work Origin Offset (G54∼G59) .................................................................. 6
5. Signal ..................................................................................................................................... 8
6. Parameter ............................................................................................................................ 11

FANUC Series 16i /18i /21i – TA/TB

Title Direct input of offset value measured B
for 2 spindle lathe
Draw
No.
A-60156E

Edit Date Design Description Sheet 1/13

Date Jan.31.02 Desig. Apprv.
 1. Outline
In 2 spindle lathe which has the back spindle, each spindle has the workpiece
coordinate system for itself. By using this function, it is available to set
automatically the tool offset and the Z-axis workpiece origin offset corresponding
to each work coordinate system with the touch sensor.
This function is the additional option. This function needs the following functions.
− Direct input of offset value measured B (−J933)
− Workpiece Coordinate System (−J894)

2. Touch Sensor
This touch sensor makes contact in two directions in each axis, and outputs four
signals when it detects a tool contact. The contact faces are selected according to
the tool nose figures to be measured.
a) +MIT1: Contact to X-axis (+) contact face (Contact in X + direction)
b) −MIT1: Contact to X-axis (−) contact face (Contact in X – direction)
c) +MIT2: Contact to Z-axis (+) contact face (Contact in Z + direction)
d) −MIT2: Contact to Z-axis (−) contact face (Contact in Z – direction)

X axis (−) contact face

(−MIT1)

Z axis (+) contact face Z axis (−) contact face

(+MIT2) (−MIT2)
+X

+Z X axis (+) contact face

(+MIT1)

FANUC Series 16i /18i /21i – TA/TB

Title Direct input of offset value measured B
for 2 spindle lathe
Draw
No.
A-60156E

Edit Date Design Description Sheet 2/13

Date Jan.31.02 Desig. Apprv.
 3. Setting of Tool Offset Value
Determine a specific point on the machine tool as the measuring reference position.
In advance, set the distance from this point to the measuring position (contact face
of the touch sensor) as a reference value, using parameter No. 5015 to 5018 and No.
5056 to 5059. Select the tool whose offset value is to be measured, and bring it to
touch the sensor, receiving a contact detection signal (tool compensation value
write signal). The mechanical coordinate value is the distance from the tool nose
position of the measuring tool at the mechanical reference (home) position to the
measuring position; set the difference between this value and the reference value
(parameter setting) into the tool offset value memory as the tool geometry offset
value. The corresponding tool wear offset value becomes 0.
(Tool offset value to be set)
= (Mechanical coordinate value when tool compensation value write signal
has become “1”)
– (Reference value (parameter value) corresponding to the tool
compensation value write signal)

The tool offset numbers are divided into two parts for spindle 1 and spindle 2 by
the parameter No. 5053 are used.

Example )
Tool offset Value of the parameter No. 5053
number When setting = 8 When setting = 10
For spindle 1 1∼8 1∼10
For spindle 2 9∼16 11∼16

Note
In case the value of the parameter No. 5053 is 0 or more than the maximum tool
offset number, the tool offset numbers are divided into to parts as follows.

Tool offset pairs 16 32 64 99

For spindle 1 1∼8 1∼16 1∼32 1∼49
For spindle 2 9∼16 17∼32 33∼64 50∼99
Tool offset pairs 400 999
For spindle 1 1∼200 1∼449
For spindle 2 201∼400 450∼999

FANUC Series 16i /18i /21i – TA/TB

Title Direct input of offset value measured B
for 2 spindle lathe
Draw
No.
A-60156E

Edit Date Design Description Sheet 3/13

Date Jan.31.02 Desig. Apprv.
 The tool offset number can be selected by the parameter No. 5005#5 (QNI)
manually or automatically.

•QNI=0 (Manual selection)

Set the cursor to the desired tool compensation number by operating the MDI
(such as page and cursor keys).
•QNI=1 (Automatic selection)
In the offset write mode, the cursor is set to the desired tool compensation
number, using the tool compensation number input signal.
For spindle 1, the cursor is set to a tool compensation number selected by the
input signal.
For spindle 2, the cursor is set to the sum of the value specified in parameter
No. 5053 and the tool compensation number selected by the input signal. In
this case, the MDI cannot be used to change the cursor position on the offset
screen.

Note
If the tool compensation number specified by the tool compensation number
input signal is out of range, the last tool compensation amount memory number
for each spindle is set up.

FANUC Series 16i /18i /21i – TA/TB

Title Direct input of offset value measured B
for 2 spindle lathe
Draw
No.
A-60156E

Edit Date Design Description Sheet 4/13

Date Jan.31.02 Desig. Apprv.
 • 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”.

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”.

(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”.

FANUC Series 16i /18i /21i – TA/TB

Title Direct input of offset value measured B
for 2 spindle lathe
Draw
No.
A-60156E

Edit Date Design Description Sheet 5/13

Date Jan.31.02 Desig. Apprv.
 ∼G59)
4. Setting of Z-axis Work Origin Offset (G54∼
In 2 spindle lathe which has the back spindle, each spindle has the workpiece
coordinate system for itself.
By assigning any G code from G54 to G59 for each workpiece coordinate system,
this function set Z-axis work origin offset of them automatically.

[Z-axis work origin offset]

= − ([Z-axis tool geometry offset] − [Z-axis machine coordinate value])

Any G code from G54 to G59 can be selected manually or automatically by the
parameter No. 5051#1(WNI).

•WNI=0 (Manual selection)

Set the cursor to the desired workpiece coordinate system G54 to G59 by
operating the MDI (such as page and cursor keys).

Note
You cannot set the value to the external workpiece origin offset (EXT).
When the cursor coincides with the external workpiece origin offset (EXT),
the warning “ ”Write inhibited” occurs in setting the work origin offset value write
signal to 1.

•WNI=1 (Automatic selection)

Set the parameter No. 5054 and No.5055 in advance to the G code number of
the workpiece coordinate system corresponding with them. CNC select the
workpiece coordinate system automatically by their parameters in the
workpiece origin offset write mode.

NOTE
If the value set in this parameter is 0, or if the value falls outside the valid data
range, 54 is assumed for the workpiece coordinate system memory for spindle
1, while 57 is assumed for the workpiece coordinate system memory for spindle
2.

The tool offset number used for measurement is selected manually or

automatically by the setting of the parameter No.5005#5. (QNI).

•QNI=0 (Manual selection)

Specify the desired tool compensation number in parameter No. 5020.

•QNI=1 (Automatic selection)

The cursor is set to the desired tool compensation number, using the tool
compensation number input signal.
For spindle 1, the cursor is set to a tool compensation number selected by
the input signal.
For spindle 2, the cursor is set to the sum of the value specified in parameter
No. 5053 and the tool compensation number selected by the input signal is
used.

FANUC Series 16i /18i /21i – TA/TB

Title Direct input of offset value measured B
for 2 spindle lathe
Draw
No.
A-60156E

Edit Date Design Description Sheet 6/13

Date Jan.31.02 Desig. Apprv.
 • Basic Procedure to Set Z-axis
workpiece origin offset Value
The Z-axis workpiece origin offset value is automatically set by the following
operation. This has to be performed after measurement of the tool geometry
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 Z-axis work piece coordinate offset value is computed
on the machine coordinate system.
(3) Set the workpiece origin offset value write mode select signal WOQSM
(G039.6) to “1”.
The CRT display is automatically changed to the work coordinate system
setting screen, and the “OFST” indicator starts blinking in the status
indication area in the bottom of the screen, which informs that the
workpiece origin offset value write mode is ready.
Then the measured spindle check signal S1MES (F062.3) or S2MES
(F062.3) is set to “1”.

Note
After that, the measured spindle select signal S2TLS (G040.5) cannot be
changed until the workpiece origin offset value write mode select signal
WOQSM (G039.6) is changed to “0”.

(4) Select a tool to be measured.

(5) Check tool offset numbers.
The tool offset number corresponding to the tool required for
measurement, shall be set in the parameter (No.5020) in advance. The
tool offset number can also be set automatically by setting the tool offset
number input signal (with parameter No.5005#5(QNI)=1).
(6) Near the tool to an end face of the workpiece.
(7) Place the tool edge to the end face (sensor) of the workpiece using manual
operation. When the tool edge contacts the end face of the workpiece,
input the workpiece origin offset write signal WOSET (G040#7). The Z–
axis the workpiece origin offset is automatically set.
(8) Release the tool.
(9) Set the workpiece origin offset value write mode signal WOQSM (G39.6)
to “0”.
i) The writing mode is canceled and the blinking “WSFT” indicator
light.
ii) The measured spindle check signal S1MES (F062.3) or S2MES
(F062.4) is set to “0”.

FANUC Series 16i /18i /21i – TA/TB

Title Direct input of offset value measured B
for 2 spindle lathe
Draw
No.
A-60156E

Edit Date Design Description Sheet 7/13

Date Jan.31.02 Desig. Apprv.
 5. Signal

Tool offset write mode select

Signal GOQSM<G039#7>
[Classification] Input signal
[Function] The mode for writing tool compensation is selected.
[Operation] When this signal is turned “1” in a manual operation mode, the mode for writing
tool compensation is selected. The control unit then automatically switches the
screen displayed on the CRT to the tool geometry compensation screen and blinks
the “OFST” status display in the bottom of the screen to notify that the mode has
been changed to the mode for writing tool compensation.

Tool offset write signal

+MIT1#1, −MIT1#1, +MIT2#1, −MIT2#1
<X004#2, #3, #4, #5> (Path1)
+MIT1#2, −MIT1#2, +MIT2#2, −MIT2#2
<X013#2, #3, #4, #5> (Path2)
+MIT1#3, −MIT1#3, +MIT2#3, −MIT2#3
<X011#2, #3, #4, #5> (Path3)
[Classification] Input signal
[Function] Each of these signals inhibits the tool from being fed along the corresponding axis
during manual operation. When signal GOQSM for selecting the mode for writing
tool compensation is set to “1”, the manual feed is inhibited and also the tool
geometry compensation along the axis is automatically calculated and the result is
set in tool compensation memory.
[Operation] When these signals are turned “1”, the control unit operates as follows:
• Inhibits tools from being fed along the corresponding axis during manual
operation.
+MIT1: Inhibits the tool from being manually fed in the positive direction
along the X-axis.
–MIT1 : Inhibits the tool from being manually fed in the negative direction
along the X-axis.
+MIT2 : Inhibits the tool from being manually fed in the positive direction
along the Z-axis.
–MIT2 : Inhibits the tool from being manually fed in the negative direction
along the Z-axis.
• When signal GOQSM for selecting the mode for writing tool compensation is
turned “1”, the manual feed interlock signal also automatically calculates the
tool geometry compensation for the tool compensation number pointed to by
the cursor and sets the result in tool compensation memory.

Note
This signal is used as the manual feed interlock signal in each axis direction.

FANUC Series 16i /18i /21i – TA/TB

Title Direct input of offset value measured B
for 2 spindle lathe
Draw
No.
A-60156E

Edit Date Design Description Sheet 8/13

Date Jan.31.02 Desig. Apprv.
 Tool offset number select signals
OFN0∼∼OFN5<G039#0∼ ∼#5>
OFN6∼∼OFN9<G040#0∼ ∼#3>
[Classification] Input signal
[Function] Selects the tool offset number.
[Operation] When the mode for writing tool compensation is selected, the cursor is
automatically positioned on the tool geometry compensation number selected by
these signals.
A tool offset number is specified by 10–bit binary number. Number 0 to 998
corresponds to the compensation number 1 to 999.

Note
This signal is available only when the parameter No.5005#5 (QNI) =1.

Work origin offset write

mode select signal
WOQSM<G039#6>
[Classification] Input signal
[Function] Select the mode for writing the work origin offset.
[Operation] When this signal is turned “1” in a manual operation mode, the mode for writing
the work origin offset is selected. The control unit then automatically switches the
screen displayed on the CRT to the tool geometry compensation screen and blinks
the “WSFT” status display in the bottom of the screen to notify that the mode has
been changed to the mode for writing the work origin offset.

Work origin
offset write signal
WOSET<G040#7>
[Classification] Input signal
[Function] Automatically calculates and sets the work origin offset amount for the workpiece
coordinate system.
[Operation] When this signal turns to “1” in the mode for the work origin offset for the
workpiece coordinate system, it triggers automatic calculation and setting of the
Z-axis work origin offset amount for the workpiece coordinate system.

Measured spindle
select signal
S2TLS <G040#5>
[Classification] Input signal
[Function] The spindle measuring the tool offset amount and Z-axis work origin offset
amount is selected.
[Operation] When this signal turns to “1” in the mode for the work origin offset for the
workpiece coordinate system, it triggers automatic calculation and setting of the
Z-axis work origin offset amount for the workpiece coordinate system.

FANUC Series 16i /18i /21i – TA/TB

Title Direct input of offset value measured B
for 2 spindle lathe
Draw
No.
A-60156E

Edit Date Design Description Sheet 9/13

Date Jan.31.02 Desig. Apprv.
 Measured spindle check signal 1
S1MES <F062#3>
Measured spindle check signal 2
S2MES <F062#4>
[Classification] Output signal
[Function] The spindle under measurement is specified.
[Output condition] These signals check which head is being measured in the tool offset write mode or
the workpiece origin offset write mode according to the S2TLS (spindle
measurement select) signal.
If spindle 1 is selected, S1MES = 1 and S2MES = 0. If spindle 2 is selected,
S1MES = 0 and S2MES = 1.

Signal address

#7 #6 #5 #4 #3 #2 #1 #0
#1 #1 #1 #1
X004 -MIT2 +MIT2 -MIT1 +MIT1

X011 -MIT2#3 +MIT2#3 -MIT1#3 +MIT1#3

X013 -MIT2#2 +MIT2#2 -MIT1#2 +MIT1#2

#7 #6 #5 #4 #3 #2 #1 #0
G039 GOQSM WOSQM OFN5 OFN4 OFN3 OFN2 OFN1 OFN0

G040 WOSET S2TLS OFN9 OFN8 OFN7 OFN6

#7 #6 #5 #4 #3 #2 #1 #0
F062 S2MES S1MES

FANUC Series 16i /18i /21i – TA/TB

Title Direct input of offset value measured B
for 2 spindle lathe
Draw
No.
A-60156E

Edit Date Design Description Sheet 10/13

Date Jan.31.02 Desig. Apprv.
 6. Parameter
#7 #6 #5 #4 #3 #2 #1 #0
5005 QNI
[Data type]
type] Bit
QNI In Direct input of offset value measured B or this function
0 Not automatically select the tool offset number
1:Automatically selects a tool offset number

#7 #6 #5 #4 #3 #2 #1 #0
5051 WNI DSN
[Data type]
type] Bit
DSN When this function is used:
0 : One touch sensor is used for both main spindle 1 and main spindle 2.
1 : Two touch sensors are used for both main spindle 1 and main spindle 2.

WHI When a workpiece reference point offset value is set in workpiece coordinate
system memory with the tool setter function for 1–turret, 2–spindle lathes:
0 : The value is set at the current cursor position.
1 : A memory is automatically selected. (The workpiece coordinate system
memory set in parameter No.5054 or No.5055 is selected.)

5020 Tool offset number used for the input of tool offset value measured B
[Data type]
type] Byte
[Valid data range] 1 to the number of tools to be compensated.
Set the tool offset number used for the input of tool offset value measured B
function or this function (i.e. when workpiece coordinate system shift value is set).
This parameter is valid when the tool offset number is not selected automatically
(Parameter No.5005#5(QNI)=0).

Distance (X1P) between reference position and X axis + contact surface

5015
on the touch sensor 1

Distance (X1M) between reference position and X axis - contact surface

5016
on the touch sensor 1

Distance (Z1P) between reference position and Z axis + contact surface

5017
on the touch sensor 1

Distance (Z1M) between reference position and Z axis - contact surface

5018
on the touch sensor 1

FANUC Series 16i /18i /21i – TA/TB

Title Direct input of offset value measured B
for 2 spindle lathe
Draw
No.
A-60156E

Edit Date Design Description Sheet 11/13

Date Jan.31.02 Desig. Apprv.
 Distance (X2P) between reference position and X axis + contact surface
5056
on the touch sensor 2

Distance (X2M) between reference position and X axis - contact surface

5057
on the touch sensor 2

Distance (Z2P) between reference position and Z axis + contact surface

5058
on the touch sensor 2

Distance (Z2M) between reference position and Z axis - contact surface

5059
on the touch sensor 2
[Data type] 2–word
[Unit of data]
Increment system IS-B IS-C Unit
Millimeter machine 0.001 0.0001 mm
Inch machine 0.0001 0.00001 inch

[Valid data range] −99999999∼99999999

They set the distance (with sign) between the measurement reference position and
sensor contact surface. For an axis under diameter programming, set it by a
diameter value.

Measurement reference position

X1M X2M

X1-axis X2-axis
X1P -(contact surface) -(contact surface)
X2P

Z1-axis Z1-axis Z2-axis Z2-axis

+(contact surface) -(contact surface) +(contact surface) -(contact surface)
Z1M
Z2P
X-axis X2-axis
+(contact surface) +(contact surface)
Touch sensor 1 Touch sensor 2
Z2M
Z1P

NOTE
These parameters are enabled when the DSN parameter (parameter
No.5051#0) is set to 1.

FANUC Series 16i /18i /21i – TA/TB

Title Direct input of offset value measured B
for 2 spindle lathe
Draw
No.
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Edit Date Design Description Sheet 12/13

Date Jan.31.02 Desig. Apprv.
 5053 Bias for tool offset numbers for measured tool offset value setting
[Data type] Byte
[Unit of data] Number
[Valid data range] 1 to maximum tool offset count
When this function is used, this parameter allocates tool offset numbers for
measured tool offset measurement values to spindle 1 and spindle 2.

Example: When the tool offset count is 16 pairs

Tool offset number

When setting = 8 When setting = 10
For spindle 1 1∼8 1∼10
For spindle 2 9∼16 11∼16

NOTE
If 0 is set for this parameter, or if the maximum tool offset count is exceeded, the
following is assumed:

Tool offset number

16 32 64 99
For spindle 1 1∼8 1∼16 1∼32 1∼49
For spindle 2 9∼16 17∼32 33∼64 50∼99

Tool offset number

400 999
For spindle 1 1∼200 1∼449
For spindle 2 201∼400 450∼999

5054 G code of workpiece coordinate system selected for spindle 1

5055 G code of workpiece coordinate system selected for spindle 2

[Data type] Byte
[Unit of data] Number
[Valid data range] 54 to 59
When the parameter No.5051 (WNI) is set to 1, in each of these parameters, a
workpiece coordinate system from G54 to G59 for workpiece reference point offset
value setting.

NOTE
If the value set in this parameter is 0, or if the value falls outside the valid data
range, 54 is assumed for the workpiece coordinate system memory for spindle
1, while 57 is assumed for the workpiece coordinate system memory for spindle
2.

FANUC Series 16i /18i /21i – TA/TB

Title Direct input of offset value measured B
for 2 spindle lathe
Draw
No.
A-60156E

Edit Date Design Description Sheet 13/13

Date Jan.31.02 Desig. Apprv.