{
  "$type": "site.standard.document",
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  "description": "The invention relates to a geodetic surveying instrument (1), configured to move a measurement light beam into a desired measurement direction (4) in space, comprising at least one movement axis (2,3) which is motorized for providing a positioning of the measurement direction (4) of the geodetic…",
  "path": "/patents/1427702",
  "publishedAt": "2022-03-23T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B25B21/00",
    "LEICA GEOSYSTEMS AG [CH]"
  ],
  "textContent": "The invention relates to a geodetic surveying instrument (1), configured to move a measurement light beam into a desired measurement direction (4) in space, comprising at least one movement axis (2,3) which is motorized for providing a positioning of the measurement direction (4) of the geodetic surveying instrument (1), and an instrument-encoder (5) at the movement axis (2,3) configured for deriving the measurement direction (4) as a measurement value of the geodetic surveying instrument (1). [0002] According to the invention, the geodetic surveying instrument (1) comprises a transmission link of the movement axis (2,3) of the geodetic surveying instrument (1) to a motor axis (7) of a stepper motor (8), which transmission link is configured with a gear reduction (1 ,14) and a slipping clutch arrangement (6), and wherein the stepper motor (8) comprises a rotational motor-encoder (9) on its motor-axis (7) and is driven by a motor controller (10) that provides a field oriented control of phase currents of the stepper motor (8), which field orientation is derived based on the rotational motor-encoder (9).",
  "title": "DRIVE SYSTEM IN A GEODETIC MEASUREMENT INSTRUMENT"
}