Scale Application; End Clamps; Reference Mark And Limit Switch Actuator Installation - Renishaw RGH24 Installation Manual

Scale application

The scale applicator A-9541-0124 is designed specifically for use with the RGH24 readheads
and RGS20-S scale. Use applicator A-9541-0305 when installing RGS20-P scale.
1
Allow scale to acclimatize to installation environment prior to installation.
2
Thoroughly clean and degrease the substrate using recommended solvents (see 'Storage and handling').
Allow substrate to dry before applying scale.
3
Mark out 'START' and 'FINISH' points for the scale on the axis substrate. Ensure that there is room for the
end clamps (see 'RGS20 scale installation drawing').
4 Mount the appropriate scale applicator to the readhead mounting bracket using M2.5 screws.
Place the shim supplied with the readhead between the applicator and substrate to set the nominal height.
NOTE: Scale applicator can be mounted either way round to enable easiest orientation for scale installation.
5 Move axis close to scale start position, leaving enough room for the scale to be inserted through the
applicator as shown below.
6 Begin to remove the backing paper from the scale and insert scale into the applicator up to the
'START' point (as shown). Ensure backing tape is routed under the splitter screw.
7
Apply finger pressure to the scale at the 'START' point,
using a clean lint-free cloth, to ensure scale end
adheres well to substrate.
8 Slowly and smoothly move the applicator through the entire axis of travel, ensuring the backing paper
is pulled manually from the scale and does not catch under the applicator.
Direction of scale application
Scale
Splitter screw
Backing paper
9
Remove applicator and, if necessary, adhere remaining scale manually. Apply firm finger pressure via
a clean lint-free cloth along the length of the scale after application to ensure complete adhesion.
10 Clean the scale using Renishaw scale wipes (A-9523-4040) or a clean, dry, lint-free cloth.
11
Fit end clamps (see 'End clamps' section).
12
Allow 24 hours for complete adhesion of scale before fitting reference mark selector magnet or limit magnet.
RGH24 RGS20 installation guide
'START' point
M2.5 mounting holes
START

End clamps

A-9523-4015 is an end clamp kit designed to be used with Renishaw RGS scale.
IMPORTANT: End clamps should be used to ensure positional stability of the scale and
reference mark repeatability.
NOTE: End clamps can be mounted before or after readhead installation.
1 Remove the lacquer coating from the last
15 mm of each end of the scale with a knife
and clean with one of the recommended
solvents (see 'Storage and handling').
3
The end clamp features two small regions
of contact adhesive. These will temporarily
hold the end clamp in position while the
glue cures. Remove the backing tape
from either side.
Ensure that excess glue is wiped away from scale
as it may affect the readhead signal level.

Reference mark and limit switch actuator installation

Screw mounted or adhesive mounted reference mark and limit switch actuators are available.
Refer to RGH24 readhead installation drawing and RGS20 scale installation drawing for
actuator positioning.
Thoroughly mix up a sachet of glue
2
(A-9531-0342) and apply a small amount
to the underside of the end clamp.
4 Immediately position end clamp
over the end of the scale.
Allow 24 hours at 20 °C
for full cure.
5