Shim Kit (A-9401-0050) - Renishaw ATOM DX Series Installation Manual

Shim kit
(A-9401-0050)
This method is intended for
applications where the
rideheight of the readhead
cannot be adjusted.
Shims
Readhead mounting surface
2.3 ±0.2 mm
Shims of a known thickness are inserted between the mounting face of the readhead and the bracket to give
the correct rideheight of 2.5 mm (±0.2 mm).
The kit consists of:
A-9401- A-9401-
Part numbers
0041 0042
Shim thickness
20 40
(µm)
Quantity in
10 10
pack
1 Using a digital dial gauge or similar measure
the distance from the readhead mounting
surface to the scale surface.
Care must be taken to ensure the scale
surface is not scratched.
Renishaw offer a DTi adapter (A-9401-0105)
that can be used to assist with this process.
– Insert the gauge into the adapter and
zero the gauge on a flat surface.
– Position or fix the gauge /adapter in
place of the readhead and measure
the distance to the scale surface.
Contact your local Renishaw representative
for details of the DTi adapter and digital
dial gauge.
ATOM DX
linear installation guide
The system should be designed to
Top of
scale
achieve a nominal distance of
2.3 mm (±0.2 mm) from the readhead
mounting surface to the top of the scale.
A-9401- A-9401- A-9401- A-9401-
0043 0044 0045 0046
60 80 100 200
10 10 20 20
2
Subtract the distance measured from the
nominal rideheight of 2.5 mm to calculate
the required shim thickness.
For example, if the distance measured
is 2.37 mm, the required shim thickness
is 130 µm.
3 Select a combination of two shims that
gets within 10 µm of the difference.
For distances less than 100 µm a single
shim should be used, for distances greater
than 100 µm select one thick (≥100 µm)
and one thin (<100 µm) shim.
In the above example this could either be
1 × 100 µm shim and 1 × 40 µm shim or
1 × 100 µm shim and 1 × 20 µm shim.
4
Place the chosen shim(s) between the
readhead and the bracket.
A-9401-
0047
5
Fix the readhead to the bracket using
300
2 off M2 × 6 screws in diagonally opposite
fixing holes, ensuring that the readhead is
10
tightened down evenly and parallel to the
bracket face.
6
Connect the readhead to the receiving
electronics and power-up.
7
Check the readhead set-up LED is flashing
Green along the full axis of travel.
8
Proceed with 'System calibration' section
(see page 17).
DTi adapter
Readhead
mounting
surface
13