Sony BS78 Series Instruction Manual page 50

4
Insert the scale between the scale clamp and the mounting surface while pressing the datum surface of
the scale (see Fig. 3-9) lightly against the reference abutment surface (Note). Gradually and alternately
tighten screws A and B of the scale clamp indicated in the figure. (Use only the left-side scale clamp for
clamps with two screws, and use the center scale clamp for clamps with three screws.) (Final fastening
torque: 1.4 N . m)
BS78-40N/NS/R/RS
B
A
n
When pressing the scale against the reference surface, lightly press two points on the edge of the scale
surface opposite the reference surface with your fingers with a force of 9.8 N or less as shown in Fig. 3-13
below.
If the middle part of the scale is pressed with a force of 4.9 N or more as shown in Fig. 3-13 below, or if the
scale is installed with deformation, the specified accuracy cannot be achieved. (This also applies to the
following procedures. If it appears that the scale has been bent by force, loosen the scale clamp and mount it
again properly.)
10
(E)
BS78-70N/NS/R/RS, 270N/NS/R/RS, 320N/NS/R/RS
A
BS78-120N/NS/R/RS, 170N/NS/R/RS,
220N/NS/R/RS, 370N/NS/R/RS, 420N/NS/R/RS
B
A
Fig. 3-12
CORRECT
Fig. 3-13
B
WRONG
BS78