ATOM Miniature Encoder System
Overview
ATOM Miniature Encoder System
ATOM is the world's first miniature encoder with filtering optics, providing improvements in dirt immunity, signal stability and reliability for linear and rotary applications.
ATOM features a number of other advances that help maintain signal stability, including integral Auto Gain Control and Auto Offset Control, along with a highly reliable IRED light source, making the product suitable for use in applications demanding quality and dependability.
The miniature readhead is available in 2 formats: hi-flex cable output or Flexible-Printed Circuit (FPC) output. .The FPC version helps reduce overall package size, with a reduced Z-height and easy cable routing.
ATOM is available with a range of high-accuracy optical linear and rotary scales, including conventional glass spars, 'unbreakable' stainless steel tape scales and glass discs. Installation has been simplified by an intuitive set-up LED on the readhead that indicates signal level. Optical reference mark phasing and incremental signal optimization can be achieved with the simple press of a button.
ATOM is suitable for use in variety of applications that require compact size, including laser scanners, CMM arms, semiconductor manufacturing, compact linear motors/motion stages, small DDR torque motors, galvanometers and microscope stages.
ATOM - miniaturization without compromise.
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Specifications
Operating and electrical specifications
| Power Supply | 5V +/- 10% Ripple |
ATOM readhead typically <50 mA ATOM with ACi typically <100 mA ATOM with Ri typically <100 mA ATOM with Ti typically <200 mA NOTE: Current consumption figures refer to unterminated systems. For analogue outputs a further 10mA in total will be drawn when terminated with 120R. For digital outputs a further 25mA per channel pair (eg A+, A-) will be drawn when terminated with 120R. Power from a 5V dc supply complying with the requirements for SELV or standard IEC BS EN 60950-1. 200 mVpp maximum@frequency up to 500kHz |
| Temperature | Storage Operating |
-20°C to +70°C 0°C to +60°C |
| Humidity | Rated up to 40°C, 95% relative humidity (non-condensing) | |
| Sealing | Cable variant IP40 Ri interface IP20 FPC variant IP20 (with lid fitted) Ti interface IP20 |
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| Acceleration (scale and readhead) | Operating | 400m/s2, 3 axes, BS EN 60068-2-27:2009 |
| Shock (scale and readhead) | Operating | 1000m/s2, 6 ms, 1/2 sine, 3 axes, BS EN 60068-2-27:2009 |
| Vibration | Operating | 100m/s2max@ 55Hz to 2000Hz, 3 axes BS EN 60068-2-6:2008 |
| Mass |
FPC readhead 2.3g
Cable 18g/m Ri 70g Cable readhead 4g
ACi 4g Ti 100g |
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| EMC Compliance |
Cable Variant FPC variant and ACi |
BS EN 61326-1:2013 Designed as system components and to be compliant with EMC regulations for products of their 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 compliance for the whole machine. |
| Environmental | Compliant with EU Directive 2011/65/EU (RoHS) | |
| Readhead Cable | 10 core, high flex, EMI screened cable, outside diameter 3.5mm maximum Flex life > 20x106 cycles at 20mm bend radius, maximum length 3m. (Extension cable up to 25m when using Renishaw approved extension cable) UL recognised |
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| FPC Cable | 16 core, 0.5mm pitch, maximum exposed conductor length 2.5mm, maximum length 1m | |
| Connector options |
Cable Variants FPC |
Interboard connector compatible with the Ri, Ti and ACi (cable variant) interfaces 15 way, D-type connector 16 core, 0.5mm pitch, ,compatible with ACi (FPC variant) |
| Typical SDE (analogue) | 40um version < +/-120nm 20um version <+/-75nm | |
Readhead Numbering
RTLF Tape Scale
| Scale type | Length | Increments | Part Number (where xxxx is the length in cm) |
Head gain setting |
| 40um (high accuracy) | 10mm to 90mm | 10mm | A-9408-xxxx | 0 |
| 100mm to 10mm | 50mm | |||
| 40um | 10mm to 90mm | 10mm | A-9407-xxxx | 0 |
| 100mm to 10mm | 50mm | |||
| 20um (high accuracy) | 10mm to 90mm | 10mm | A-9406-xxxx | 0 |
| 100mm to 10mm | 50mm |
RCLC glass scale
| Length (mm) | 20um | 40um | Head gain setting |
| 18 | A-9404-2018 | A-9404-4018 | 1 |
| 30 | A-9404-2030 | A-9404-4030 | 1 |
| 55 | A-9404-2055 | A-9404-4055 | 1 |
| 80 | A-9404-2080 | A-9404-4080 | 1 |
| 100 | A-9404-2100 | A-9404-4100 | 1 |
| 105 | A-9404-2105 | A-9404-4105 | 1 |
| 130 | A-9404-2130 | A-9404-4130 | 1 |
Interface Numbering
0004
0020
0040
0100
0200
0400
1000
2000
4000
10KD
20KD
20um system
5um
1um
0.5um
0.2um
0.1um
50um
20um
10um
5um
2um
1um
40um system
10um
2um
1um
0.4um
0.2um
0.1um
40um
20um
10um
4um
2um
Dimension
*On FPC Variants the Set-up LED cut-out is circular.
Not optical centerline.
| Maximum speed | 40um system - 20 m/s 20um system - 10 m/s |
RTLF Installation
Technical Specifications
| Material | Hardened and tempered martensitic stainless steel fitted with a self-adhesive backing tape |
| Form | 0.41mm x 8mm (H x W) (including adhesive) |
| Scale pitch | 20um and 40um |
| Datum fixing | Adhesive datum clamp (A-9585-0028) secured with Loctite®435 |
| Reference mark | Auto-phase optical reference mark repeatable to unit of resolution throughout specified speed and temperature range Customer de-selectable reference marks at 50mm spacing Reference mark in the center of scale for lengths |
| Accuracy (At 20°C) | 40um (high accuracy) &emsp +/-5 um/m 40um &emsp +/-15 um/m 20um &emsp +/-5 um/m |
| Coefficient of thermal expansion/td> | ~10.6 um/m/°C* |
| Length | 10mm to 90mm in 10mm increments 100mm to 10m in 50mm increments measuring length = Overall length - 3mm |
| Mass | 12.2g/m |
*Substrate coefficient of thermal expansion does not need to match that of the scale.
Maximum recommended axis length 1m for 20um system.
RCLC Installation
Technical specifications
| Material | Soda lime glass fitted with a self-adhesive backing tape | ||||||||||||||||
| Form | 1.1mm x 6.35mm (HxW) (including adhesive) | ||||||||||||||||
| Scale pitch | 20um and 40um | ||||||||||||||||
| Datum fixing | Fillet of adhesive (A-9531-0342) on one side of the scale | ||||||||||||||||
| Reference mark | Auto-phase optical reference mark repeatable to unit of resolution throughout specified speed and temperature range Either mid or one end of travel, determined by orientation of the readhead |
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| Accuracy (at 20°C) | ±3um | ||||||||||||||||
| Coefficient of thermal expansion | ~8um/m/°C | ||||||||||||||||
| Length (mm) |
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| Mass | 13.9g/m |