2. Scale installation procedure.
Refer to the relevant RGH22 or RGH41 system installation guides for general details of scale
application including: location, orientation, protection and operating environment. Also scale and
mounting surface (substrate) preparation.
2.1 Applicator assembly
.
Select an appropriate adaptor, as described in section 3, and attach it to the applicator body using
the screw and hexagon key provided. This will give either 11.5 mm or 15.5 mm offset dimension
from the scale centreline to the mounting face.
2.2 Axis preparation.
Refer to the relevant RGH22 or RGH41 system installation guides for axis preparation details.
Mark a line on the substrate parallel to the axis guideway at the desired position of the scale centreline.
2.3 Readhead mounting bracket alignment
.
To lay the scale at a given position using the
RGA22 applicator, it is necessary to set the
machine bracket, on which the readhead mounts,
at the appropriate offset given in 2.1 above,
from the known scale centreline position.
1. Set the machine bracket with 11.5 mm or
15.5 mm offset from scale centreline,
as appropriate, depending upon which
way round the readhead is to be mounted.
This can be done by measurement or
by attaching the assembled applicator to
the machine bracket, locating it into the
readhead setting gauge and adjusting
the position to align the setting gauge
notch over the marked centreline,
see Figure 2a.
2. Adjust the readhead mounting bracket
to ensure that the readhead mounting
face is square to the scale’s mounting
surface and parallel to the axis guideway
within the tolerances shown in Figure 2a.
2.4 Scale guide preparation
1. Cut scale to the required length and feed into
the scale guide slot. The scale profile is
symmetrical, therefore it can be applied
either way round.
Hint:
To ensure that the scale backing paper
engages in the splitter blade, carefully roll
back the leading 5-10 mm and then
re-attach. Do
not
fold the backing paper
as this will prevent correct engagement
2. Feed the scale as far as point X, (Figure 2b),
checking that the backing paper is removed
correctly by the feeding action.
3. If required, lock scale at this position
by fitting and lightly tightening the
extension handle as shown.
Do not use excessive torque as this
could damage the scale guide or scale face.
2.5 Scale application
1. Move the axis to the start of travel, noting direction of scale application.
2. Turn plunger release knob to the UP position to ensure that applicator plunger is retracted.
3. Engage the scale guide into the applicator head
until the detent clicks
(see Figure 2c).
Figure 2b Scale insertion
Scale
Release
paper
Scale guide
‘Lock’
Extension handle
X
Figure 2c Scale positioning
20
Start of
measuring length
Limit stop
Limit of
travel
Plunger release knob
‘UP’-retracted
Extension
handle
‘unlock’
End of
scale mark
Scale
centre-line
mark
Notch aligns with
scale centre-line
Readhead
setting gauge
Figure 2a Applicator set-up
*0.5 - 1.0
F-Axis guideway
15.5- Adaptor M - 9531-0193
11.5-Adaptor M-9531-0191
0.1 F
0.15
*
Adaptor
Machine bracket
3
