
A-79344E
Title
Draw
No.
Ed. Date Design Description
Date Jan.06.’04 Design. Apprv.
2/24
page
FANUC Series 30i-MODEL A
Input of tool offset value measured B
General
When the touch sensor is provided, the tool offset value can be
automatically settable in the tool offset memory, by moving the tool to
make contact with the touch sensor during manual operation. The
workpiece coordinate system shift amount can also be automatically set.
・Touch sensor
Either of the following two cases may be selected depending on parameter setting.
1) If TS1 (bit 3 of parameter No. 5004) is 0
The touch sensor has two direction–specific contact faces for each axis, thus outputting four
signals (+MIT1, +MIT2, –MIT1, and –MIT2) when contact is detected.
2) If TS1 (bit 3 of parameter No. 5004) is 1
A touch sensor based on one contact input outputs one signal (+MIT1) when the one–contact
input detects contact. So, which of directions of each axis is involved is automatically
determined, and feeding in the corresponding axis direction is disabled.
+Z
Z axis
+
contact face
(+MIT2)
Z axis
-
contact face
(-MIT2)
X axis
-
contact face
(-MIT1)
X axis
+
contact face
(+MIT1)
+X
Touch Sensor
・Setting 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. 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)