US 2022/0128962 A1Published application

Control device

AssigneeOMRON Corporation

InventorsYuto YASUI, Junji SHIMAMURA, Masahiko NAKANO, Takafumi OKURA, Tomonori SHIMAMURA

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Abstract

A work machine for performing a predetermined task through electronic cam control causes a master axis and a slave axis to return to have the correlation following an electronic cam profile after stop of electronic cam control. A predetermined position, which is a position of a slave axis drive corresponding to a cam angle of the stopped master axis, is obtained based on an electronic cam profile in response to stop of synchronization control over a master axis drive and the slave axis drive performed in the work machine. In response to the stopped slave axis drive being determined to be at a position deviating from the predetermined position, a return path is calculated based on the predetermined position and an interference section, in a range of cycles for the slave axis drive, in which the slave axis drive interferes with the workpiece for the predetermined task.

Claims4

Dependent claims

A controller for a work machine including a master axis drive corresponding to a master axis and a slave axis drive corresponding to a slave axis, the work machine being configured to cause the slave axis drive to perform a predetermined task on a workpiece, the controller being configured to perform synchronization control of a position of the slave axis drive based on an electronic cam profile corresponding to a cam angle of the master axis, the controller comprising:

an obtainer configured to obtain a predetermined position based on the electronic cam profile in response to stop of synchronization control over the master axis drive and the slave axis drive, the predetermined position being a position of the slave axis drive corresponding to a cam angle of the stopped master axis;
a calculator configured to calculate, in response to the stopped slave axis drive being determined to be at a position deviating from the predetermined position, a return path based on the predetermined position and an interference section in which the slave axis drive interferes with the workpiece for the predetermined task, the interference section being in a range of cycles for the slave axis drive, the return path causing the slave axis drive to reach the predetermined position while avoiding the interference section;
and
a return unit configured to move the slave axis drive to the predetermined position on the return path by driving the slave axis drive.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 17/434,916Filed 5 Mar 2020
Priority: JP 2019-04811615 Mar 2019
Published: 28 Apr 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

G05B 19/058
Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts: safety, monitoring
G05B 19/056
Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts: programming the PLC
G05B 19/06
Program control other than numerical control, i.e. in sequence controllers or logic controllers: using cams, discs, rods, drums or the like
G05B 19/18
Electric: numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as…