Mitutoyo ABSOLUTE ABS AT1123 - Precautions on Designing the Mounting Surface

14
2 Setup for Mounting
No. 99MBE095B
2.4.5 Precautions on Designing the Mounting Surface
The following describes precautions on designing the mounting surface.
For details of the mounting specications, refer to
"4.6 External View and Dimensional Drawings of
the Scale Main Unit" on page 38.
For details of the mounting procedures, refer to
"3 Mounting onto the Machine" on page 15.

Precautions
y The mounting surfaces of the scale main unit and the detector head must be machine-processed
and the atness must be 0.05/500 or below.
y There is a gap between the scale main unit and the detector head mounting surfaces, therefore,
remove it by the machine processing so that the gap is within the processing tolerance of 2±0.1
mm. When adjusting the position by inserting a spacer, etc., be sure to measure the gap before
mounting the scale.
y When mounting the scale main unit, the position must be adjusted in the vertical direction, as indi-
cated in the gure below.
It is recommended to use positioning pins, etc. to simplify the position adjustment.
Note that the vertical reference for positioning the scale main unit is the aluminum frame surface.
y Use the head xing block to adjust the clearance between the scale main unit and the detector
head.
For the details of the mounting method, refer to
"3 Mounting onto the Machine" on page 15.
Positioning pin
Aluminum frame surface
Horizontal
direction
Vertical
direction
Head xing block
Detector head
Detector head
xing surface
Scale main unit
Scale main unit
mounting surface
Scale main unit
Aluminum frame surface
Head xing block
Detector head
Gap: 2±0.1 mm
(machine-processed)
2±0.224.5
(gap between
Detector head and aluminum frame)
The dimensions of the installation
gap are di󰀨erent between the front
and the back side depending on the
gradient of the Detector head.