Specifications

59
The offset register
Limit of spindle retraction
Internal counter value (invisible)
Offset register value (invisible)
Display value (visible)
Limit of spindle extension
Origin point
mark position
The preset value is shown on the display at the time of input
3mm
-3mm
5mm
6mm
4mm
12mm
Workpiece
Power ON
8mm
(6)
(5)
(8) (12)
(13)
(11)
(10)(9)(1)
(4)
(3)
(2)
(7)
Note) The example linear gage used in the above explanation is LGF-0510 (110) ZL. This linear gage has its origin point marked at a position approximately 3mm from the
limit of the spindle extension. In the case of 25/50mm-stroke types the origin point mark is positioned approximately 5mm from the spindle extension limit.
To the timing when the spindle passes over the originpoint,
the counter begins counting from the offset value.
The purpose of the offset register is to supply a value to be added to the display so
that it indicates the correct measurement value. When a preset value (the master
gage dimension) is entered into the system the current internal counter value is
subtracted from this value and the result is stored in the offset register. From then
onward this resultant value is added to the internal counter to provide the display
value, which then indicates the correct dimension relative to the datum surface.
Reference surface
Comparison measurements
Procedure
1. T
urn the display unit connected to the gage head to ON. (The offset register is set to zero at this stage.)
2. Displace the gage head spindle approximately more than 3mm from the spindle extension limit position to
make it pass over the origin point mark.
3.
The display unit will automatically read the origin point and zero-set itself.
4. Bring the gage head contact point into contact with the master gage as shown.
5. The display unit indicates the displacement from the origin point position. (Offset register still contains zero.)
6. Input the preset value (the calibrated size of the master gage, 12.000).
7. Remove the master gage so that the spindle extends to its limit.
8. The display unit displays position of the contact point relative to the datum surface (-3.000 + 8.000 = 5.000)
9. Turn OFF the display unit.
10. Turn ON the display unit.
11. Displace the gage head spindle approximately more than 3mm from the spindle extension limit position to
make it pass over the origin point mark.
12.
The display unit will automatically read the origin point and the displayed value will effectively start from the
stored offset register value (0.000 + 8.000 = 8.000).
13.
The contact tip can now be brought into contact with the workpiece to make the measurement and the
display will indicate the workpiece size (4.025 + 8.000 = 12.025).
The following is a description of the interactions that occur between Origin
Point Mark detection, the Internal Counter, the Display and the Offset
Register while setting up and making a comparison measurement with a
linear gage head.