# US 5,777,446 A · Method of positioning a part > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,777,446 A - Document ID: US5777446A - Status: Granted - Kind: A - Application number: 08/679,272 - Filed: 1996-07-12 - Granted: 1998-07-07 - Earliest claimed: 1995-07-27 - Assignees: Robert Bosch GmbH - Inventors: Norbert Knab; Holger Pruessel - Web page: https://patentgrep.com/patent/US5777446A ## CPC - G05B 19/42: Recording and playback systems, i.e. in which the program is recorded from a cycle of operations, e.g. the cycle of operations being manually controlled, after which this record is played back on the same machine - E05Y 2400/34: Pulse count limit setting - E05Y 2800/00: Details, accessories and auxiliary operations not otherwise provided for - G05B 2219/36464: Position, teach, store extreme, full open, closed positions - G05B 2219/41099: Calibration by going to two extremes, limits, counting pulses, storing values - G05B 2219/43113: Give stop order a certain number of motor rotations before end stop - G05B 2219/43179: Speed changes gradualy from constant value to zero - G05B 2219/45242: Door, panel, window operation, opening, closing - G05B: CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (systems for controlling or regulating non-electric variables G05D; systems for regulating electric or magnetic variables G05F; control devices or systems insofar as characterised by mechanical features only G05G) - E05Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF ## Abstract A method of positioning a part includes the steps of reciprocatingly moving a part between two end positions by a drive, generating a control signal for the drive upon reaching the end positions, stopping the drive or changing a drive direction of the drive upon receipt of the control signal; detecting a position of the drive after a first reaching of at least one of the end positions by the part, storing the detected position of the drive, and during further approaches of the end positions by the part, stopping the drive or changing the drive direction before reaching the end positions. After a selectable number of approaches of the part to at least one of the end positions the drive is stopped only when the end position is reached and the position of the drive is detected and stored once again. ## Claims ### Claim 1 A method of positioning a part, comprising the steps of reciprocatingly moving a part between two end positions by a drive; generating a control signal for the drive upon reaching the end positions; stopping the drive or changing a drive direction of the drive upon receipt of the control signal; detecting a position of the drive after a first reaching of at least one of the end positions by the part; storing the detected position of the drive and, during further approaches of the end position by the part, stopping the drive or changing the drive directions before reaching the end positions unless a postadjustment is performed, said postadjustment being performed after a selected number of approaches of the part to at least one of the end positions, said postadjustment including stopping the part at reaching one of the end positions again detecting the position of the drive, storing said position detected again for use in place of said position previously stored. ### Claim 2 (depends on 1) A method as defined in claim 1, wherein said detecting includes determining a position of a drive shaft of the drive during first reaching of the end positions, and subsequently detecting a number of revolutions of the drive shaft between the end positions. ### Claim 3 (depends on 1) A method as defined in claim 1; and further comprising slowly reducing a rotary speed of a drive shaft of the drive before reaching a stopped position by the drive before the end positions. ### Claim 4 (depends on 3) A method as defined in claim 3, wherein said stopping before reaching the end position includes stopping a drive shaft of the drive after a selectable number of revolutions of the drive shaft before reaching the end positions. ### Claim 5 (depends on 4) A method as defined in claim 4, wherein said stopping includes stopping the drive after 1-5 revolutions of the drive shaft before reaching the end positions. ### Claim 6 (depends on 5) A method as defined in claim 5, wherein said stopping includes stopping the drive after 2 revolutions of the drive shaft before reaching the end positions. ### Claim 7 (depends on 1) A method as defined in claim 1, wherein the number of approaches of the part to at least one of the end positions is selected to be between 3 and 9. ### Claim 8 (depends on 7) A method as defined in claim 7, wherein the number of approaches of the part to one of the end positions is selected to be 5. ### Claim 9 (depends on 1) A method as defined in claim 1; and further comprising slowly reducing a rotary speed of a drive shaft of the drive before reaching the end positions by the drive. ### Claim 10 A device for positioning a part, comprising a drive for reciprocating the part between two end positions; means for generating a control signal for said drive during reaching the end positions; means for stopping said drive or changing its drive direction in response to the control signal; means for detecting a position of said drive during a first approach of at least one of the end positions by the part; means for storing the detected position of the drive, said means for stopping said drive or changing its drive direction being formed so that during further approaches of the end position by the part, the drive is stopped or the drive direction is changed before reaching the end positions unless a post adjustment is performed after a selected number of approaches of the part to at least one of the positions, by stopping the part at reaching one of the end positions, again detecting the position of the drive, storing said position detected against for use in place of said position previously stored.