Patent ID: 11913814
Assignee: DR. JOHANNES HEIDENHAIN GMBH
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 21:
22. A method for operating a position-measuring device comprising a carrier body having a first measuring graduation, a second measuring graduation, and a reference mark, the first measuring graduation including a plurality of graduation structures periodically arranged along a first measurement direction, the graduation structures of the first measuring graduation each extending parallel to a first direction, the second measuring graduation including a plurality of graduation structures periodically arranged along a second measurement direction, the first measurement direction and the second measurement direction being perpendicular to each other, and the reference mark extending in a second direction, the first direction and the second direction forming an angle different from 0° therebetween, the method comprising:
scanning the first measuring graduation and generating first scanning signals;
scanning the second measuring graduation and generating second scanning signals;
scanning the reference mark and generating a reference pulse; and
determining a phase angle of the reference pulse as a function of the first scanning signals and the reference pulse.