ISO 9001:2015
Modern means of measuring equipment
  • Eng

Optical incremental linear encoder RGH24

Renishaw plc (Graet Britain)

Encoder RGH24
Encoder RGH24

When working with an open, non-contact RGH24 encoder , the unique RGS20-S tape size of 20 μm from Renishaw is used, with a resolution of up to 10 nm! RGH24 compact head is ideally suited for use in coordinate tables (Microstage systems), actuators and other cases with limited available space.

Characteristics and benefits of the RGH24 reading head

- Ultra-compact reading head with built-in interpolator provides output of digital and analog output signals corresponding to the industrial standard.
- Non-contact design provides high speed and reliability of work at zero friction and absence of mechanical wear.
- A simple procedure for installing and adjusting the reading head due to the presence of a special built-in LED indicator.
- Optical signal filter system guarantees high signal stability under conditions that prevent the use of most open optical encoders.
- Zero mark ensures the repeatability of the initial position, and the limit switches - the automatic signal giving the initiating stop of the moved node.
- It is offered with various options for connectors, including a 10-pin JST-connector, which is convenient when embedding the system.

Scale tape RGS20-S in 20 μm steps

RGS20-S tape with a pitch of 20 microns is made of a thin flexible steel strip, which is coated with gold to provide high reflectivity and corrosion resistance. This tape can be fixed, using a self-adhesive base, on most materials used in the industry, including metals, ceramics and composite materials.
- The tape is supplied on a reel, it can cut off parts of the desired length, up to 70 m.

RGS20-S tape has temperature characteristics corresponding to the characteristics of the substrate on which the tape is attached, which simplifies the process of compensating for the effect of temperature.
- A special device is provided for fast and accurate installation of the scale tape (patented).

The lacquer coating of the tape is easy to clean and is resistant to external influences that occur when manipulating the tape.

You can always cut a piece of any necessary length that optimizes inventory management and minimizes waste.
- High accuracy of linearity tolerance of 3 μm / m provides high overall accuracy with simple adjustment procedure.


Built-in LED
head position indicator
Measuring range, m: up to 50
Length, m: optical scale RGS20S from 0,1 to 50 (more than 50 m by special order)
optical scale RGS20PC from 1 to 50
Resolution of digital output signal RS422, nm: 10, 20, 50 , 100, 200, 500, 1000, 5000
Resolution of analog output signal: 1 Vpp
12 mkA
Step of the scale, mkm: optical scale RGS20S 20
optical scale RGS20PC 20
Max speed, m/s: for digital output signal up to 10
for analog output signal up to 4
Clearance between reading head
and optical scale, mm:
0,8 0,1
System accuracy at 20 C, μm/m: 15 ( 3 with 2-point compensation)
Scale option: with self-adhesive base
Coefficient of thermal expansion, μm/m/: corresponds to the substrate material, the ends of the scale are fastened by clamps
Supply voltage, V: 5 5 %
Current consumption (without load), mA: 120
Material: optical scale RGS20S thin, flexible steel gilded strip with protective lacquer coating
optical scale RGS20PC thin, flexible steel gilded strip with protective polyester coating for increased resistance to the effects of aggressive chemicals
Cable: flexible, 8-core, double-shielded, 4.4 mm outer diameter, bending life more than 20x10 6 cycles with a bending radius of 20 mm
Length of the cable, m: 1.5, 3, 5 (connector type Dsub (9- and 15-pin), round connector (9-pin), free terminal (without connector) or connector JST)
Dimensions of the reading head RGH24 (height × length × width), mm: 14,8 × 36,0 × 13,5
Mass of the reading head, g: 11
Mass of the cable, g/m: 34
Reference mark (zero): Magnetic actuator (one-way repeatability up to 1 resolution unit)
Limit switches: One switch
Temperature, : process from 0 to + 55
storage from 20 to + 70
Degree of protection: IP40
Maximum humidity
(without compensation), %:
process 80
storage 95
Process acceleration, m/s 2: 500
Impact (in non-operating state,
6 ms, half-sinusoidal impulse), m/s 2:
Vibration (in operation mode, at, at 55-2000 Hz), m/s 2: not more than 100

Additional information