Device for positioning a component receptacle unit of an automatic placement machine for printed circuit boards
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Jul 11, 2002
app pub date -
Jun 22, 2001
filing date -
Jan 9, 2001
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
The rotary positioning of a suction pipette (5) serving for receiving a component (8) takes place with the aid of an incremental encoder arrangement essentially comprising a stationary read head and a rotatable segmental disk (9) which has an incremental track (10) for measuring a traversed angle of rotation for the fine positioning and also one of two full tracks (12a, 12b) arranged in opposite quadrants (11a, 11c) of the segmental disk (9) and serving for rapid movement into an initial position of the suction pipette (5) for receiving a component (8). According to the invention, to supplement the full tracks (12a, 12b) the segmental disk (9) is in this case provided with an additional marking (13a; 13b', 13b'; 13c) in order to ensure, by means of the incremental encoder arrangement, a reproducible angular orientation of the suction pipette (5) with respect to the initial position. (in this respect, FIG. 3a)
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