Position and Speed Sensor MiniCoder GEL 2443

Mini Coder Gel 2443 Mini Coder Gel 2443

Functional Description

  • Measurement of speed and position by proximity sensing of precision target wheel
  • Scanning by means of magnetoresistive sensor elements
  • Measuring unit consisting of sensor and precision target wheel for installation on shafts with diameters ranging from 8 mm to more than 500 mm

Applications

  • Speed detection in HSC spindles (High-Speed-Cutting)
  • Measurement of speed and position of milling and grinding spindles in machine tools for the machining of metal, wood, glass, stone and aluminium
  • Angle measurement in radar equipment
  • Electronic synchronization of helical spindles in dry-running vaccum pumps
  • Measurement of speed in test stands

Special features

  • Easy to install thanks to its (optional) amplitude control
  • Highly resistant to interference due to its metallic coating
  • Sufficient scope for construction due to customerspecific production of precision target wheels
  • Internal production of target wheels with module 0.3 and 0.5 from speeds from 0 to more than 70,000 min-1
  • Safety integrated certificate
  • Output signal 1 Vpp with high signal quality (sin/cos)
  • Cable outlet axial or radial
  • Sensor fully encapsulated
  • Very compact

Measuring Principle

  • Integrated MR-sensors for contactless scanning of target wheel
  • Sensor signals internally amplified and temperaturecompensated
  • Frequency range from zero to max. 200 kHz

Output Signals

  • Outputs short-circuit-proof
  • Signal Forms:

  • - two signals phase-shifted by 90° for sense-of-rotation detection
    - sine-wave signal 1 Vpp - all signals aditionally available as inverted signals
    - option: reference pulse

Technical data GEL 2443

Output level 1 VPP as differential input
Output signals two sine-wave signals, by 90° out of phase, and their inverse signals short-cicuit-proof, option: reference pulse
Output frequency 0 ... 200 kHz for CL = 5 nF
Offset (static) ± 20 mV
Amplitude tolerance -20 ... +10 %
Amplitude ratio UA/UB 0.9 ... 1.1
Supply voltage VS 5 V DC ± 5 %
Power consumption without load ≤0.3 W
Permissible air gap 0.15 mm ± 0.02 mm with module 0.3
0.20 mm ± 0.03 mm with module 0.5
Width of the target wheel min. 4.0 mm
Material of the target wheel ferromagnetic steel
Operating temperature range -30°C ... +85°C
Ambient and storage temperature range -40°C ... +120°C
Protection class IP 68
Electromagnetic compatibility EN 61000-6-1 to 4*
Insulation strength according to EN 60439-1 500 V
Vibration resistance (IEC 68-2-6) 200 m/s2
Shock resistance (IEC 68-T2-27) 2000 m/s2
Weight 30 g
Housing material polyphenylene sulfide (PPS), glassfibre reinforced
Connection 9-core cable, cross section 0.15 mm2, outside diameter 5 mm(-0.3), min. bending radius 25 mm

The technical data provided are valid for the operating temperature range.

*) Important: Where possible, connections to the cable screen should be made coaxially. Connections to the cable screen using single wire cores should be kept as short as possible.

Dimensional drawing, Boring and milling diagram

Mini Coder Gel 2443 - Dimension Drawings - Lenord & Bauer Rail Speed Sensors and Rotary Pulse Encoders

Mini Coder Gel 2443 - Boring Milling Diagram - Lenord & Bauer Rail Speed Sensors and Rotary Pulse Encoders

Type code, Description

Type Code

Mini Coder Gel 2443 - Typecode - Lenord & Bauer Rail Speed Sensors and Rotary Pulse Encoders


K = signal pattern sine/cosine-signals 1 VSS (pin layout)

Mini Coder Gel 2443 - Signal Pattern sine/cosine - Lenord & Bauer Rail Speed Sensors and Rotary Pulse Encoders


N = reference mark (flag)

A metal flag integrated in the target wheel is detected when its position is exactly between two teeth. This reference signal can be used as a positon reference. This is required, for instance, for the automatic changing of a tool in a milling or grinding spindle.

Mini Coder Gel 2443 - Reference mark (flag) - Lenord & Bauer Rail Speed Sensors and Rotary Pulse Encoders


M = reference mark (groove)

Depending on size and geometry of the target wheel, the target wheel version with a reference tab can only be used up to certain speeds. For speeds beyond 30.000 min-1, a MiniCoder detecting a reference groove integrated in the target wheel is used. For technical reasons, the target wheel is in this case composed of two parts.

Mini Coder Gel 2443 - Reference mark (groove) - Lenord & Bauer Rail Speed Sensors and Rotary Pulse Encoders


Z = Reference mark (flag over groove)

This MiniCoder version can be used for scanning a target wheel manufactured in one piece. The system permits reaching speeds of more than 70.000 min-1. The reference flag is in alignment with a tooth of the pulse track.

Mini Coder Gel 2443 - Z Reference mark - Lenord & Bauer Rail Speed Sensors and Rotary Pulse Encoders


R = Amplitude Control

The GEL 2443 MiniCoder offers facilities for stabilizing fluctuations in the sin/cos amplitudes resulting from changes to the measuring distance and temperature. This greatly reduces the effort needed to install the unit: there is no longer any need to readjust the MiniCoder to optimize the signals.




G =Axial cable outlet
Mini Coder Gel 2443 - G =Axial cable outlet - Lenord & Bauer Rail Speed Sensors and Rotary Pulse Encoders


R = Radial cable outlet
Mini Coder Gel 2443 - R = Radial cable outlet - Lenord & Bauer Rail Speed Sensors and Rotary Pulse Encoders



3 = Module 0.3

The module describes the relation between the number of teeth and the outer diameter of a target wheel. The smaller the module the smaller the outer diameter for the same number of teeth. The air gap to be observed between sensor and target wheel is less with module 0.3 than with module 0.5.


da= m • (z+2)

da = outer diameter m = module z = number of teeth

The MiniCoder must be ordered compatible with the target wheel.


5 = Module 0.5
Mini Coder Gel 2443 - Module 0.5 - Lenord & Bauer Rail Speed Sensors and Rotary Pulse Encoders

module air gap d
adjustment
dimension
distance tolerance
0.3 0.15 ± 0.02 mm
0.5 0.20 ± 0.03 mm



Connection type K = cable end open

The Minicoders are manufactured with open cable end. The following cable length are available (30/150/250/600 cm).

Mini Coder Gel 2443 - Lenord & Bauer Rail Speed Sensors and Rotary Pulse Encoders

The screen connection is connected to the screen of the sensor cable. In order to improve electromagnetic compatibility (EMC), the screen connection should be connected to the flange on which the MiniCoder is mounted.

Mini Coder Gel 2443 - Connection Type K table - Lenord & Bauer Rail Speed Sensors and Rotary Pulse Encoders


Connection type A = 17-pole male plug, straight type, B = 17-pole male plug, elbow type

Ready-made cable variants with 17-pole male connector (straight type, elbow type) are available on the market.

Mini Coder Gel 2443 - Connection type A = 17-pole male plug, straight type

Mini Coder Gel 2443 - Connection type B = 17-pole male plug, elbow type

The screen connection is connected to the screen of the sensor cable. In order to improve electromagnetic compatibility (EMC), the screen connection should be connected to the flange on which the MiniCoder is mounted.

Mini Coder Gel 2443 - Examples and Table - Lenord & Bauer Rail Speed Sensors and Rotary Pulse Encoders


_ _ _ = Cable length (cm)

For connection type K= cable end open, 4 cable length are available: 30, 150, 250, 600 cm. For ready-made connecting cables with male connectors, the length of the cable is to specified in cm.

Cable type: PUR cable 9 x 0.15 mm2 screened
Screen not connected on MiniCoder side
Outside diameter: 5 mm (– 0.3)
Min. bending radius: 25 mm



M = cable for temperature sensor (2 m)

Variants A and B (see further down page) can be delivered on request with the cable for the temperature sensor connected to the mating connector.

Cable type: TEFLON cable 9 x 0.14 mm2
Outside diameter: 2.8 mm (± 0.1)
Min. bending radius: 20 mm

E-= Additional screen connection on sensor head.

The screen connection is connected to the screen of the sensor cable. In order to improve electromagnetic compatibility (EMC), the screen connection should be connected to the flange on which the MiniCoder is mounted.



Accessories (interpolation electronics)

Mini Coder Gel 2443 - Interpolation Accessories - Lenord & Bauer Rail Speed Sensors and Rotary Pulse Encoders

The MiniCoder’s 1 VPP output signals are generally interpolated by the installed controller. If your controller does not offer this facility, Lenord + Bauer can supply standalone interpolation electronics units from its series GEL 212, GEL 213 or GEL 214. These convert the 1 VPP output signals to TTL square-wave signals (maximum interpolation factor = 512). We will be happy to send you our product documentation on request, or you can simply visit our website at www.lenord.de and download it from there.

Custom-made target wheels, Standard target wheels

Custom-made target wheel

Target wheel are made to individual specifications on request of the customer. Please send us a dimensional drawing of your target wheel (if possible, as a dxf-file) info@lenord.de.

Target Wheels

For detecting rotary movements, the MiniCoders and target wheels form a complete unit. The target wheel size and hence , its diameter are directly dependent on the module and the number of teeth, i.e.:

z = (da/ m) - 2

da = m • (z+2)

Standard target wheels (see table) are available at short notice ex factory.

Table - standard target wheels
Number of teeth
z
module
m
[mm]
OD - Θ
da
[mm]
ID - Θ
standard
[mm]
ID - Θ di max.
[mm]
collar - Θ
dr
[mm]
100 0.5 51.0 12 H7 30 H7 47
125 0.5 63.5 12 H7 35 H7 60
128 0.5 65.0 12 H7 35 H7 61
200 0.5 101.0 12 H7 70 H7 97
250 0.3 75.6 12 H7 45 H7 72
250 0.5 126 25 H7 85 H7 122
256 0.3 77.4 12 H7 50 H7 74
256 0.5 129 25 H7 90 H7 125
360 0.3 108.6 25 H7 70 H7 105
500 0.3 150.6 25 H7 110 H7 147
512 0.3 154.2 25 H7 110 H7 151


Mini Coder Gel 2443 - Dimensional Drawing target wheel - Lenord & Bauer Rail Speed Sensors and Rotary Pulse Encoders

Type code for standard target wheels Mini Coder Gel 2443 - Target Wheel Type Code - Lenord & Bauer Rail Speed Sensors and Rotary Pulse Encoders

Mechanical data - Custom-made target wheels

Mini Coder Gel 2443 - Target Wheels - Lenord & Bauer Rail Speed Sensors and Rotary Pulse Encoders

Mini Coder Gel 2443 - Mounting Bores - Lenord & Bauer Rail Speed Sensors and Rotary Pulse Encoders

Lenord & Bauer: Rail Speed Sensors & Rotary Pulse Encoder

Other products relating to GEL 2443 are: GEL 2432, GEL 2442, GEL 2444