Renishaw ATOM DX Installation Manual
Installation guide
M-9414-9447-01-A
ATOM DX
RSLM high accuracy linear encoder
™
rotary encoder systems
Contents
Product compliance 1
Storage and handling 2
ATOM DX system installation overview 3
RCDM rotary disc
Installation drawing 4
Mounting the disc 5
Aligning the disc 6
System connection: Top exit readhead 8
Readhead mounting and alignment:
Methods 9
Shim kit (A-9401-0050) 9
Dummy head (A-9401-0072) 10
ATOM DX calibration overview 11
System calibration 12
Restoring factory defaults 12
Enabling/disabling AGC 12
Readhead LED diagnostics 12
Troubleshooting 13
ATOM DX
Cabled readhead dimensions 15
Top exit readhead dimensions 16
Output signals 17
Speed 18
Electrical connections 19
General specications 20
Disc specications 20
ATOM DX rotary installation guide
Product compliance
C
Renishaw plc declares that ATOM DX complies with the applicable standards and regulations.
A copy of the EU Declaration of Conformity is available from our website at
www.renishaw.com/productcompliance
FCC compliance
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.
The user is cautioned that any changes or modications not expressly approved by Renishaw plc
or authorised representative could void the user’s authority to operate the equipment.
This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment.
This equipment generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely to cause harmful
interference in which case the user will be required to correct the interference at his own expense.
NOTE: This unit was tested with shielded cables on the peripheral devices. Shielded cables must
be used with the unit to ensure compliance.
ATOM DX top exit readhead
The ATOM DX top exit readhead has been designed as a system component and to be compliant with
EMC regulations for products of its type. Care must be taken with shielding and grounding arrangements
to ensure EMC performance once installed. It is the system integrator’s responsibility to implement,
test and prove EMC compatibility for the whole machine
Further information
Further information relating to the ATOM DX encoder range can be found in the ATOM DX system Data
sheet (L-9517-9736), Advanced Diagnostic Tool ADTi -100 Data sheet (L-9517-9699), Advanced Diagnostic
Tool ADTi -100 and ADT View software quick-start guide (M-6195-9321), and the Advanced Diagnostic Tool
ADTi -100 and ADT View software user guide (M-6195-9413). These can be downloaded from our website at
www.renishaw.com /opticalencoders and are also available from your local representative. This document
may not be copied or reproduced in whole or in part, or transferred to any other media or language, by any
means without the written prior permission of Renishaw. The publication of material within this document does
not imply freedom from the patent rights of Renishaw plc.
Disclaimer
RENISHAW HAS MADE CONSIDERABLE EFFORTS TO ENSURE THE CONTENT OF THIS DOCUMENT
IS CORRECT AT THE DATE OF PUBLICATION BUT MAKES NO WARRANTIES OR REPRESENTATIONS
REGARDING THE CONTENT. RENISHAW EXCLUDES LIABILITY, HOWSOEVER ARISING, FOR ANY
INACCURACIES IN THIS DOCUMENT.
The packaging of our products contains the following materials and can be recycled.
Packaging Component Material ISO 11469 Recycling Guidance
Outer box
Inserts
Bags
Low Density Polyethylene Foam LDPE Recyclable
High Density Polyethylene Bag HDPE Recyclable
Cardboard Not applicable Recyclable
Polypropylene PP Recyclable
Cardboard Not applicable Recyclable
Metalised Polyethylene PE Recyclable
Patents
Features of Renishaw’s encoder systems and similar products are the subjects of the following
patents and patent applications:
CN101300463 EP1946048 JP5017275 US7624513
CN101310165B EP1957943 US7839296 CN105008865
US9952068 CN109477736 EP3465099 US2017203210
ATOM DX rotary installation guide
REACH regulation
Information required by Article 33(1) of Regulation (EC) No. 1907/2006 (“REACH”) relating to products
containing substances of very high concern (SVHCs) is available at: www.renishaw.com / REACH
The use of this symbol on Renishaw products and/or accompanying documentation indicates that
the product should not be mixed with general household waste upon disposal. It is the responsibility
of the end user to dispose of this product at a designated collection point for waste electrical and
electronic equipment (WEEE) to enable reuse or recycling. Correct disposal of this product will help
to save valuable resources and prevent potential negative effects on the environment.
For more information, please contact your local waste disposal service or Renishaw distributor.
1
Storage and handling
Disc and readhead
Storage
+70 °C
−20 °C
N-heptane
CH
(CH2)5CH
3
Operating
3
+70 °C
0 °C
Propan-2-ol
CH3CHOHCH
Humidity
3
ATOM DX rotary installation guide
95% relative humidity
(non-condensing) to
EN 60068-2-78
2
ATOM DX system installation overview
This section gives an overview of the steps involved in installing, setting-up and calibrating an ATOM DX encoder system.
More detailed information is contained within the rest of the document.
For information on designing the readhead and disc into the system refer to the detailed installation drawings
and 3D models at www.renishaw.com /opticalencoders or contact your local Renishaw representative.
For information on the ATOM DX product range refer to the ATOM DX data sheet L-9517-9736.
IMPORTANT: Prior to installing readhead and disc, installation drawings should be reviewed to ensure correct orientation of readhead relative to disc.
Disc alignment
Optical alignment
using a microscope.
(see page 6).
Shim kit.
(see page 9).
Electrical alignment
Using two readheads.
(see page 7).
Mount and align readhead
Dummy head.
(see page 10).
Calibrate system
(see page 11).
ATOM DX rotary installation guide
3
RCDM rotary disc: Installation drawing (Cabled readhead shown)
For dimensioned readhead drawings see pages 15 and 16.
Centre of alignment band
Set-up LED
10.25 ± F
A ± E
Reference mark
Dimensions and tolerances in mm
Glass disc
Forward direction
of disc
(increasing count)
(Pitch tol. ±1°)
0.36
Rideheight (for calibration):
2.5 ±0.08 (40 µm version)
2.5 ±0.04 (20 µm version)
Operating rideheight:
2.5 ±0.11 (40 µm version)
2.5 ±0.055 (20 µm version)
D1
D2
D3
Centre of
alignment band
Alignment band for
aligning the disc
on the hub/shaft
2.3
Black mask 10 µm (±5 µm) thick on reverse of disc
underneath incremental and reference track
(Roll tol. ±1°)
0.22
For detailed installation drawings, including tolerances, refer to www.renishaw.com /opticalencoders
Disc
size
(mm)
17 – 1 024 3.275 8.10 16.9 13.04 10.63 – 0.1 – 0.1
20 – 1 250 3.275 11.00 19.9 15.92 12.07 – 0.1 – 0.1
25 – 1 650 6.46 16.10 24.9 21.01 14.62 – 0.125 – 0.075
27 – 1 800 9.625 18.00 26.9 22.92 15.57 – 0.125 – 0.075
30 4 096 2 048 12.8 21.15 29.9 26.08 17.15 0.1 0.125 0.075 0.125
36 5 000 2 500 12.8 26.90 35.9 31.83 20.03 0.125 0.175 0.075 0.2
50 7 200 3 600 25.5 40.90 49.9 45.84 27.03 0.125 0.2 0.075 0.2
56 8 192 4 096 25.5 47.25 55.9 52.15 30.19 0.125 0.2 0.1 0.225
68 10 000 5 000 25.5 58.55 67.9 63.66 35.94 0.15 0.2 0.125 0.3
108 16 384 8 192 50.9 99.20 107.9 104.30 56.26 0.2 0.2 0.225 0.3
Line count
20 µm
version
40 µm
version
D1
(mm)
D2
(mm)
D3
(mm)
Optical diameter
(mm)
(mm)
Radial tolerance
A
20 µm
version
E (mm)
40 µm
version
Longitudinal
tolerance F (mm)
20 µm
version
40 µm
version
ATOM DX rotary installation guide
4
Mounting the disc
Mounting surface design
The recommended mounting surface (hub / shaft) profile must allow for the following features:
u
Overspill areas either side of the adhesive mounting surface for excess adhesive to run-off.
u
Sufcient clearance between the disc ID and hub / shaft to allow correct alignment.
u
A small height clearance between the disc contact surface and the adhesive mounting surface
to allow application of a controlled thin lm 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 27 30 36 50 56 68 108
Maximum OD
of disc contact
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.
9.52 14.2 16.12 19.28 25.04 39.04 45.36 56.66 97.3
*
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)
u
Room cure 2-part epoxy (such as Araldite 2014)
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 but these areas should not
be filled with adhesive.
See cross section drawing
Cross section of typical hub and disc assembly
Clearance between disc ID
Black mask
Disc contact surface
and hub / shaft
Adhesive
mounting surface
Customer hub
Adhesive overspill areas
Contact your local Renishaw representative for more information on designing the
mounting surface, suggested materials and adjustment methods.
ATOM DX rotary installation guide
RCDM disc
Bead of
adhesive
Disc contact
surface
Adhesive
mounting surface
2
Using a weight (or similar) ensure the disc touches the hub / shaft over the entire disc contact surface.
Weight
Weight
Movement of disc during
alignment procedure
3
Align the disc so it is concentric with the hub / shaft.
4
Cure the adhesive.
5
Aligning the disc
There are two possible ways to accurately align the disc to minimise eccentricity:
u
Optical alignment using a microscope
u
Electrical alignment using two readheads
The method chosen to align the disc on the system depends upon the application and available
space, etc. It should be noted that the graduations and alignment band are accurately concentric
with each other but not with the glass disc. The following sections outline how to align the disc
using these methods.
NOTE:
The disc should not be mounted on the black mask on the reverse of the disc
(apart from 17 mm disc).
Optical alignment
This method uses a microscope, which could be connected to a camera,
to monitor the movement of the alignment band as the disc is rotated.
Position the microscope / camera over the alignment band on the disc so that any
1
displacement of the alignment band due to rotation of the disc / hub assembly
can be observed.
Alignment
band
Microscope
and camera
2
Rotate the disc / hub assembly and observe the maximum and minimum limits of movement
of the alignment band as shown below.
Maximum movement
Minimum movement
0° Rotation
3
Note the axis position at the limits of movement.
4
Rotate the disc so either of these limits of movement is located under the microscope.
5
Gently move the disc relative to the hub in a radial direction so the alignment band
90° Rotation 180° Rotation 270° Rotation
moves half way between the limits of movement.
NOTE: The alignment band is 30 µm wide.
Position of disc at limit of movement of alignment band.
Alignment band
Direction of
movement
Microscope
ATOM DX rotary installation guide
RCDM disc / hub
assembly
Position of maximum or
minimum limit of movement
of the alignment band
6
Rotate the assembly and repeat steps 3 to 5 until the total alignment band
movement is within the design specications.
7
Cure the adhesive.
8
Recheck the run-out.
Contact your local Renishaw representative for more information on aligning the disc.
6
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