Hiwin 25.12345, Руководство по сборке

Страница: 18 / 64

18
Options of the linear tables
Assembly Instructions
Linear Tables HT-L
HTL-01-0-EN-1905-MA
4.5.2 TTK70 1)
The TTK70 distance measuring system is used in the linear tables HT-L for absolute position determination, without reference
run. The position determination is magnetic with very high resolution. The sensor board which is aligned with the measuring
level is equipped with Hall sensors on two parallel tracks. Their arrangement corresponds to the division of the magnetic
scale into an incremental and an absolute component. To calculate the absolute position values during operation, the
encoder first detects the absolute starting position when the linear motor is started via the Manchester encoding. Then all
further actual positions of the drive are determined via the incremental position on the magnetic track or via sine/cosine
signals. The measuring system is integrated inside the axis in order to save space. The interface for the electrical connection
is located on the side of the carriage. The system is integrated via the HIPERFACE ® interface.
1) Manufacturer: SICK AG
Information on connection and pin assignment can be found in Section 6.6.2.2
For professional commissioning and integration into the system with the HIPERFACE ® interface, please refer to the manufac-
turer’s documentation.
NOTE
4.6 Hall sensor
For motionless commutation, a Hall sensor with digital output signal is available for linear tables HT-L. The digital Hall sen-
sors have three square signals offset through 120° (see Fig. 4.8).
Fig. 4.8 Output signal from digital Hall sensor with single ended output
0°
Hall A
Hall C
Hall B
Motor W-U
Motor V-W
Motor U-V
60° 120° 180° 240° 300° 360°
|
Sensor signal either 0 or 1
|
A combined analysis of the motor voltage supply and Hall sensor determines reliably the motor’s sense of direction.
|
Analysis based on the rotor displacement angle between 0° and 90° (ideally 0° and 45°)
For more information about connection and pin assignment, please refer to Section 6.6.2.2
NOTE