Mounting Of Scale - Sony SJ700A Series Instruction Manual

3-4-1. Mounting of scale

〈1〉 When the mounting surface already meets
parallelism and flatness requirements
When the scale mounting surface is finished and meets the
parallelism and flatness specifications below, just mount the
scale. (For scales of L < 1250 mm (49"), use two M4 x 10 hex
socket head cap screws and two plain washers (M); for scales of
L > 1250 mm (49"), use three M4 x 10 hex socket head cap
screws and three plain washers (M). Tightening torque: 350
N.cm/35 kgf.cm)
Flatness of A, B surfaces
Parallelism of A, B surfaces to
machine table movement
Provide the range shown in Fig. 3-5 for surface A.
The above tolerances suppose no quick change in the surfaces
and no obstacle in the way between the right and left mounting
surfaces.
〈2〉 When the scale mounting surface is a casting
surface
Mount the scale using mounting brackets
(1) When the scale mounting surface is a casting
surface and parallelism is not satisfied
Use mounting brackets and adjust so that the parallelism
specified in 〈1〉 may be satisfied.
SJ700A
within 0.15 mm (0.006")
Mounting brackets are only necessary at the left and right
foot areas of the scale. They do not need to extend the entire
length of the scale. However, if it is not possible to measure
the parallelism of the left and right feet due to the movable
length of the mounted unit, it will be necessary to make
longer mounting brackets.
Shorter than the machine table stroke
Fig. 3-6 Length of mounting brackets and measurement
of their parallelism
Mounting bracket
9
(E)