MiniCODER Basic GEL 2440
The measuring system comprises a scanning unit Mini-
CODER basic and a precision target wheel
Precision target wheels for attachment to shafts with a
shaft diameter from 8 mm to 130 mm are to be ordered
Limited selection of target wheel variables available
Magnetoresistive sensors contactlessly scan the target
wheel and acquire the rotational speed
Output signals are two 90º phase offset square-wave
signals, their inverse signals TTL / RS 422 as well as a
Equipped with integrated interpolation, internal ampli-
fication of the sensor signals
Evaluates the signals from the reference gap and in this
way references the position
Output signal level TTL / RS 422 Frequency range 0 to ≤ 500 kHz Rotational speed measurement range from 0 to over
Temperature range -20 ºC to +100 ºC Protection class IP 68
Maintenance and wear-free due to the magnetic meas-
Suitable for target wheels with module 0.4 or 0.5 Extremely robust thanks to fully encapsulated electron-
Flexible cable laying due to axial cable outlet
Field of application
Position and rotational speed acquisition in machine
Construction and design
The measuring unit comprises a scanning unit and a measuring scale. The system does not need dedicated
bearings for this task, as the measuring scale is mounted directly on the shaft. The market-optimised system operates
contactlessly and is extremely compact.
Sensors, magnet and electronics are manufactured using the latest micro system technology and are fully encapsulated,as such they are particularly resistant to shocks and vibration. A further advantage of this system is that it is maintenance and wear-free and therefore reduces operating costs.
Output signals (signal pattern)
The MiniCODER basic outputs square-wave signals with TTL level. In addition, it evaluates signals from a reference gap (TG).
|TG||+ 5 V DC ± 5 %||TTL|
Vs Supply voltage
Vout Signal output
The MiniCODER basic can detect reference marks in the form of a gap. This reference pulse detected can be used
for referencing the position.
The selection of the reference mark is defined by the size and rotational speed of the target wheel used, as both parameters have an effect on the forces acting on the reference mark.
Reference mark G - gap
On a target wheel a tooth is milled away over half the width of the tooth wheel. In this way there is a gap in the reference track that is detected.
The sin/cos signals generated in the encoder are interpolated
and output as square-wave signals. The interpolation
factors 1, 2, 4 and 8 are available. The interpolation is undertaken
directly in the sensor.
On the usage of a target wheel with 250 teeth and the selection of an interpolation factor of 8, the MiniCODER basic provides 2000 square-wave signals per turn.
The module describes the relationship between the number of teeth and the outside diameter of a target wheel. Given the same number of teeth the following applies: the smaller the module the smaller outside diameter.
Air gap table
|Type||Module||Air gap d,
|4||0.4||0.15 mm||±0.03 mm|
|5||0.5||0.15 mm||±0.03 mm|
The MiniCODER must be ordered to suit the target wheel.
The MiniCODER basic are supplied with a flying lead.
Connection type K - flying lead
With the connection type K (flying lead) there are 4 cable lengths available: 30, 150, 250, 600 cm.
|Supply voltage VS||5 V DC ± 5 %, reverse polarity protected|
|Current consumption||≤ 60 mA|
|Output level||TTL / RS422|
|Output signal||Two square-wave signals offset by 90º and their inverse
signals, short-circuit-proof; with reference pulse
|Output frequency||≤ 500 kHz|
|Power consumption without load||≤ 0.3 W|
|Electromagnetic compatibility||EN 61000-6-1 to 4 (1)|
|Dielectric strength||500 V, in accordance with EN 60439-1|
|Permissible air gap||0.15 mm ± 0.03 mm|
|Width of the target wheel||min. 4.0 mm|
|Target wheel material||Ferromagnetic steel|
|Housing material||Die cast zinc|
|Assured operating temperature range||-20 ºC to +100 ºC|
|Operating and storage temperature range||-20 ºC to +100 ºC|
|Protection class||IP 68|
|Vibration resistance||100 m/s2, in accordance with DIN EN 60068-2-6|
|Shock resistance||1000 m/s2, in accordance with DIN EN 60068-2-27|
|Max. permissible cable length||100 m (Pay attention to voltage drop on the supply cable)|
|Connection||9-core cable, core cross-section 0.15 mm2, outside diame-
ter 5-0.3 mm, min. bending radius 25 mm.
Dimensional drawing, boring and milling sketch,
Dimensional drawing GEL 2440 - axial cable outlet
Boring and milling sketch
For the measurement of rotary movements, MiniCODERs form a unit together with target wheels. The target wheel size and the related diameter depend directly on the module and the number of teeth.
Standard target wheels
Standard target wheels are available on short delivery times from stock. For specifications and designs see "Technical information ZAx / ZFx".
|Core colour||Signal / function||TG|
|brown||VS||+ 5 V supply voltage|