Specifications

■
Air injection and oil lubrication
In the standard configuration, the end cap section is provided with an M5 tap hole for air injection and oil
lubrication. For more detailed information, please refer to the Instruction Manual (sold separately).
3. Bring the scale into contact with the stop
surfaces and install.
Installation example
Scale installation accuracy is improved when a
stop surface is made. This also simplifies
reinstallation of the scale.
1. Check and adjust the scale bracket’s parallelism
with respect to the machine guide, and then secure
in place. As shown in the figure, adjust the
parallelism over the entire bracket length even when
making a difference in levels on the scale installation
surface.
Example 1 (recommended):Installation when a
stop surface of the scale and slider is made
with the bracket
Example 2: Installation when a stop surface of the
scale and slider is not made with the bracket
2. Check and adjust the height and parallelism
of the slider bracket, and then secure in place.
1. Adjust the parallelism of the scale bracket and slider
bracket with respect to the machine guide, and
then secure in place. Adjust the height and
parallelism of the slider bracket with respect to the
scale bracket, and then secure in place.
2. Adjust the parallelism with respect to the machine
guide of the scale rear while measuring the scale
rear with a dial gauge. Tighten the set screws.
<Measurement method>
Measure at two points where the measurement
distance is as wide as possible and at the same
distance from the right and left scale ends. If using
a scale with intermediate foot plate, be sure to also
measure the intermediate foot plate.
3. Insert the supplied spacer (t = 1.0 mm) in the
space between the scale and slider, and then adjust
the slider position while bringing the slider into
contact with the scale.
Linear Scale SR77
Fig. 1
Opening facing
downward
（○）
Opening facing
（△）
Opening
（×）
Fig. 2
Coolant
Scale and slider installation notes
· Do not turn on the power before installing the scale.
· Install the scale with the opening on the scale unit facing downward. If the opening cannot be turned
downward, it should face horizontally. Never install it facing upward. (Fig. 1)
· Remove off the coating around the tap hole to ground the scale unit using the installation surface
contact with the scale.
· Be aware that the scale will be damaged if slider moved outside the measuring length (ML).
· In environments where coolant can splash directly on the scale, be sure to mount a cover on the
scale to protect the scale from splashing. (Fig. 2)
Fig. 4
Plastic hook
Fig. 3
Slider holder L
Slider holder R
Clamp nut
Clamp nut
end cap
· The slider holders are used to secure the slider in place during transport.
They are not guides for installation.
· Do not take off the slider holders, if possible, until immediately before securing the slider.
· Even if the slider holders are removed, the plastic hook provided on the slider allows the slider to
maintain an approximate positional relationship with the scale unit.
· The plastic hook can come off if the slider is forcibly twisted or other excessive force is applied. If the
plastic hook comes off, return the plastic hook back to its original position before performing the
installation. (See Fig. 4.)
· After removing the slider holder, be sure to take off the clamp nuts remaining on the scale.
· Before installing the scale, check that the alignment of the installation surface (or installation
brackets) is within the standards.
· Use a scale installation bracket, where applicable, having a length covering the entire scale length.
The parallelism of the scale may be harmed if only using a bracket divided for the installation section.
· The foot plates on both ends and intermediate foot plate installed on the scale unit are used as the
installation guides.
· Loosely turn the mounting screws first. Determine the alignment and then tighten the screws to
fasten the scale. (See Fig. 5.)
Fig. 5
Bring into contact
Both ends : M8 x 16 (20 N.m)x.
Intermediate foot plate : M4 x 10 (2.7 N.m)
Slider : M4 x 20 (2.7 N.m)
Bring into contact
Fig. 8
Fig. 11
spacer (t = 1.0 mm)
* Please measure it with two points that took the measurement interval widely as much as possible at a place of the same distance from the measurement
method right and left scale both ends. In the case of the intermediate foot scale with, please measure the intermediate foot part.
Scale
bracket
Or
Fig. 6
Unit: mm
7.5 ± 0.05
0.1 MG
Fig. 9
Unit: mm
0.1 MG
0.05 MG
0±0.2
0.05
or less
Slider bracket
Slider bracket
Scale bracket
Unit: mm
Fig. 10
Same distance
from scale ends
0.1 MG
Unit: mm
Fig. 7
57.9±0.3
0±0.2
0.05
or less
Slider bracket
Scale bracket
Slider bracket
0.05 MG
57.9 ± 0.3
16 17