Magnescale LH71 Setting Manual

LH71/72
Segmented error
compensation function
Setting manual
1. First of all
This function defines the section within the movable range of the measuring unit and corrects the mechanical error for each section. Since
the compensation value is calculated from the reference point, it is valid only when using the measurement unit with built-in reference
point scale. The range that can correct the segmented error is the range of 7 digits (display resolution) that is displayed based on the
reference point (0) of each axis.
In order to use this function, it is necessary to measure the error between the movement of the machine and the actual movement
(detection amount of the measuring unit) with a laser interferometer or the like in advance. Then, determine the compensation value for
the segmented error from the measurement result, and input the compensation value to the display unit.
After completing the input of the compensation value, perform the reference point reading operation to enable the interval error
compensation. Depending on the tendency of the measured mechanical error, the linear compensation function may be sufficient, so
please judge.
NOTE:
- When the segmented error function is set, the reference point reading mode is automatically entered when the detailed settings are
completed / when the power is turned on / when the error is cleared.
- The compensation value is zero in the area that exceeds the segmented error compensation (the area that exceeds the set range, the
range that cannot be set).
- If the display overflows, the compensation value data will be invalid.
2. Setting flow of Segmented error compensation function
Measurement of mechanical error:
STEP 1
Measure the machine error with a laser interferometer, length reference device, etc. based on the
reference point position (0 mm) of the scale so that the error curve can be visualized.
Creation of compensation data:
STEP 2
Create compensation data by determining compensation points from the visualized error curve.
Input of compensation data:
STEP 3
Input compensation data (compensation point, compensation value) to the display unit
Reference point reading:
STEP 4
Read reference point in reference point mode.
Finished
LH71/LH72 Segmented error compensation Setting manual
Ver. ２ (2020.11)
CS&S
1/5