CMT Magnetic Linear Encoder

by Precizika Metrology

The CMT magnetic linear encoder are non-contact type with a measuring length of up to 50 meters (164 ft). 

These encoder are used to convert linear displacements of essential machine components into electrical signals providing information about the value and direction of the displacement.

The encoder is intended to use in particular heavy conditions. It is protected against elements of technological processes and mechanical actions.

Encoder consists of metal based magnetic band MP, reading head and profile rail PS with protective band. The length of magnetic band could be up to 50 m. 

Encoder could be supplied with external zero signal actuator (magnet), which allows usage one of many reference marks made on magnetic band. Zero signal actuator is not necessary if the magnetic band with reference marks made according customer requirements (MP200Z) is used. The reading head has LED, which indicates the reference mark passage by head.

Two versions of output signals are available:

• CMT-F - Square-wave signals, with integrated subdividing electronics for interpolation.

• CMT-AV - Sinusoidal signals, with amplitude approx. 1 Vpp, which require external subdividing electronics.



MECHANICAL DATA

Version CMT-F CMT-AV
Measuring length (ML) up to 50 m. (max. 20 m. with MP500) up to 50 m. (max. 20 m. with MP500)
Repeatability ± 1 increment ± 1 increment
Max. measuring frequency 300 kHz 300 kHz
Power supply (5...28) DC ± 5 % V (5...28) DC ± 5 % V
Current consumption without load 60 mA max 60 mA max
Current consumption with load 140 mA max (with 5 V and R = 120 Ω); 115 mA max (with 12 V and R = 1.2 kΩ); 90 mA max (with 28 V and R = 1.2 kΩ) 140 mA max (with 5 V and R = 120 Ω); 115 mA max (with 12 V and R = 1.2 kΩ); 90 mA max (with 28 V and R = 1.2 kΩ)
Phase shift between signals 90° ± 5° 90° ± 5°
Protecion (IEC 529) IP67 IP67
Operating temperature 0...+50°C 0...+50°C
Storage temperature +20...+80°C +20...+80°C
Permissible humidity 100 % non condensing 100 % non condensing
Permissible vibration (55...2000 Hz) 300 m/s2 300 m/s2
Permissible shock (11 ms) 1000 m/s2 1000 m/s2
Output signal shape Square-wave TTL pulses Sine-wave
Output signals 6 - two main + one zero signal and their complementary Two main + one zero (square-wave pulse)
Output scheme Line driver (push-pull optional) Line driver; push-pull
Weight of reading head 40 g 100 g
Standard cable length 2 m 2 m
Max. cable length of head 10.0 m 10.0 m
Max. cable length of encoder (2 m of head + adapter) 100.0 m 100.0 m
Electrical protections from inversion of power supply polarity; from short circuit on output port from inversion of power supply polarity; from short circuit on output port

 

APPLICATIONS

  • Robotics
  • Packaging
  • Retrofitting
  • Factory Automation
  • Turning machines & centers
  • Automotive

PART NUMBER CONFIGURATION TABLE