ATOM™ incremental encoder system with CENTRUM™ CSF40 rotary (angle) disc
Features
- Readhead size: 20.5 x 12.7 x 7.85 mm (20.5 x 12.7 x 6.8 mm for FPC version)
- Analogue or digital with resolutions down to 2 nm
- Speed up to 20 m/s
- Stainless steel self-centring disc
- Low Sub-Divisional Error (SDE) of <±120 nm
Benefits
- Miniature package
- Filtering optics design enabling high dirt immunity
- Advanced Diagnostic Tool for easy fault finding
- Robust metal scale disc with innovative alignment flexures
- Fixing options: bolts or clamp
- Quick and easy to install
What is ATOM?
ATOM is Renishaw's miniature non-contact optical incremental linear and rotary encoder system. Its innovative design combines miniaturisation with leading-edge signal stability, dirt immunity and reliability. This combination is unique in the market place and represents a significant advance in the performance and reliability of miniature encoders.
ATOM is supplied in hi-flex cable and flexible-printed circuit (FPC) variants.
A range of interfaces is available including the standard Ri, a high-performance Ti and the compact open ACi interface.
What is CENTRUM™ CSF40?
CENTRUM CSF40 is a stainless steel encoder scale disc. It includes innovative alignment flexures that automatically centre the scale when pushed onto a shaft, providing improved metrology performance.
CENTRUM self-centring scale discs are quick and easy to install 'right first time': no additional gauges or set-up devices are required.
The discs are made from robust stainless steel, which is resilient and easy to clean.
With 40 µm pitch incremental graduations, CENTRUM discs are available in a range of sizes and fixing options. For custom disc sizes, please contact your local Renishaw representative.
Why choose this encoder system?
Miniature encoder where space is at a premium
ATOM, available in sizes as small as 6.8 mm x 20.5 mm x 12.7 mm, allows for integration in the tightest of spaces. There are a number of options to choose from including both cabled and component FPC versions.
High reliability and system performance
ATOM is the world's first miniature encoder system incorporating Renishaw's unique filtering optics design. This is further enhanced by dynamic signal processing within the readhead including Auto Gain Control and Auto Offset Control. This combination allows ATOM to have higher dirt immunity and signal purity which is comparable to, if not better, than our standard size readheads with SDE as low as ±120 nm. The result is smoother velocity control for improved scanning performance and increased positional stability, essential parameters for many motion control applications.
Self-centring robust scale disc
Self-centring CENTRUM scale discs feature excellent part-to-part reproducibility and are easy to install 'right first time', every time.
The built-in alignment flexures are used to locate the scale disc both during scale manufacture and subsequent disc mounting, ensuring that the scale marks are concentrically located about the mounting shaft.
Interface options
ATOM comes with a variety of interface options which allows greater flexibility to integrate the encoder within your system design.
Ri interface
- Ri interfaces offer analogue 1 Vpp or digital interpolation outputs down to 0.1 µm (clocked) and 1 μm (non-clocked) in a compact low cost package.
- This is contained within an industry standard 15 way D-type connector shell, including CAL button.
Ti interface
- Ti interfaces are designed for applications that require higher speed, lower SDE and digital interpolation down to 20 nm and include a CAL button.
- Clocked outputs have been optimised for speed and performance at all resolutions for industry-standard controllers.
- Analogue variants are also available.
ACi interface
- ACi interfaces are a range of high performance, miniature, open interpolator subsystems.
- They bring unparalleled price-performance benefits to today's motion systems that need fine resolution coupled to high speed performance in an ultra compact, open format, small footprint solution and have provision for calibrating the system.
- Digital interpolation down to 20 nm at up to 40 MHz clocked output is available.
- FPC, cabled or PCB connector versions available.
Technical specifications
Measuring standard | Stainless steel disc |
Readhead size (LxWxH) | Cable variant: 20.5 mm x 12.7 mm x 7.85 mm FPC variant: 20.5 mm x 12.7 mm x 6.8 mm |
Scale pitch | 40 µm |
Thermal expansion coefficient | 15.5 ±0.5 µm/m/°C |
Disc outer diameter | Fixing options: Bolts: 38.4 mm to 120 mm Clamp: 31 mm to 120 mm For other sizes, contact Renishaw |
Line count | Fixing options: Bolts: 2 482 to 9 142 Clamp: 1 900 to 9 142 |
Reference mark | Single reference mark |
Graduation accuracy | ±0.5 µm |
| Installed accuracy | < ±10 µm (when following recommended mounting) |
| Installed eccentricity | Typically < ±5 µm |
| Shaft diameter | Fixing options: Bolts: 7 mm to 88.6 mm Clamp: 7 mm to 95 mm |
Maximum speed | (see data sheet for details) |
Sub-Divisional Error (SDE) | Typically < ±120 nm |
Dynamic signal control | Real time signal conditioning including Auto Gain Control (AGC) and Auto Offset Control (AOC) for optimised performance across a range of operating conditions |
Incremental signals Analogue
| 1 Vpp (See data sheet for details of angular resolutions) |
Incremental signals
| From 10 m to 2 nm resolution (See data sheet for details of angular resolutions) |
Electrical connection | Cable readhead: Interboard connector compatible with the Ri, Ti and ACi interfaces or 15 way, D-type connector |
Power supply | 5 V ± 10% < 50 mA (readhead) < 200 mA (with Ti interface) < 100 mA (with Ri interface) < 100 mA (with ACi interface) (unterminated) |
Vibration (operating) | 100 m/s² max @ 55 Hz to 2000 Hz, 3 axes |
Shock (operating) | 500 m/s², 11 ms, ½ sine, 3 axes |
Operating temperature | 0 °C to +70 °C |
Sealing | Cable variant: IP40 Ri/Ti interface: IP20 ACi interface: IP00 |
Refer to data sheets for full details.