Mounting The Disc - Renishaw ATOM Installation Manual

Mounting the disc

Mounting surface design
The recommended mounting surface (hub/shaft) profile must allow for the following features:
Overspill areas either side of the adhesive mounting surface for excess adhesive to run-off.
u
u Sufficient clearance between the disc ID and hub/shaft to allow correct alignment.
A small height clearance between the disc contact surface and the adhesive mounting surface
u
to allow application of a controlled thin film of adhesive.
u A maximum outer diameter of the disc contact surface to ensure it is not touching the black mask
on the reverse of the disc. See table below for dimensions.
Disc size (mm)
17 20 25
Maximum OD
of disc contact
* 9.52 14.2
surface (mm)
*
17 mm disc can be mounted on black mask due to space constraints. All other size discs the black mask must not impede the disc contact surface.
Cross section of typical hub and disc assembly
Clearance between disc ID
and hub/shaft
Black mask
Adhesive
mounting surface
Disc contact surface
Contact your local Renishaw representative for more information on designing the
mounting surface, suggested materials and adjustment methods.
ATOM
rotary installation guide
30 50
27 36 56
19.28 39.04
16.12 25.04 45.36 56.66
Customer hub
RCDM disc
Adhesive overspill areas
Gluing the disc
There are 2 recommended types of adhesives for bonding the disc to the hub/shaft:
u UV cure adhesive (such as Dymax OP4, gel version)
Room cure 2-part epoxy (such as Araldite 2014)
u
68 108
97.3
2 Using a weight (or similar) ensure the disc touches the hub/shaft over the entire disc contact surface.
3
Align the disc so it is concentric with the hub/shaft.
4 Cure the adhesive.
1
Apply a thin bead of adhesive to the
adhesive mounting surface.
It should be of sufficient quantity only to
fill the gap between the hub and disc.
Small amounts may run-off into adhesive
overspill areas, however these areas
should not be filled with adhesive.
Disc contact
surface
Weight
Weight
See cross section drawing
Bead of
adhesive
Adhesive
mounting surface
Movement of disc during
alignment procedure
5