Encoder with Hollow Shaft Type

Hollow-shaft encoders are used for applications with large shaft diameters. They allow clamping equipment or workpieces to be introduced through the shaft.

Applications include, for example, direct drives for milling machines or lathes. Siemens hollow shaft type encoders are called SIZAG and SIMAG

SIZAG hollow shaft encoder produces sinusoidal signal output (1Vpp). A hollow shaft encoder consists of gearwheel and scanning head. The gearwheel is available in 256 or 512 teeth. The maximum permissible speed which can be handled by 256 teeth variant is 24,000RPM while the 512 teeth variant is only 12,000RPM.

SIMAG H is an incremental measuring system capable of obtaining rotational angles and speeds. Its area of application includes hollow
shafts with direct drive units 1 FE1, 1 PH2, and for self-sustaining spindle encoders.

The measuring system SIMAG H consists of the following three components:

• Gearwheel: The gearwheel carries a magnetic imprint. The gearwheel is mounted on the shaft.
• Scanning head: The scanning head scans the incremental and reference tracks located on the gear wheel without touching it.
• Cable assembly: This assembly is completely pre-fabricated. Signal lines are connected to it. Hollow shaft measuring system.

All type of Siemens hollow shaft encoders can be adapted individually to existing space requirements and are compatible with Siemens servodrive system SIMODRIVE 611.