公开(公告)号：US20180321062A1

公开(公告)日：2018-11-08

申请号：US15775970

申请日：2016-12-01

Applicant: RENISHAW PLC

Inventor： Finlay Jonathan EVANS ,  James Reynolds HENSHAW ,  Stephen Lindsey TOCKNELL ,  Richard David James GEARING

IPC: G01D5/347

CPC classification number: G01D5/34753 ,  G01D5/34715 ,  G01D5/34776

Abstract: A sealed encoder module for mounting onto a machine so as to measure relative displacement of first and second parts of the machine. The sealed encoder module can comprise, a scale, a readhead comprising a scale signal receiver, and an integral protective housing which encapsulates at least the scale and said scale signal receiver. The sealed encoder module can be configured to determine and output diagnostic information regarding a scale signal detected by the readhead.

公开(公告)号：US20230286099A1

公开(公告)日：2023-09-14

申请号：US18246776

申请日：2021-10-06

Applicant: RENISHAW PLC

Inventor： Samuel David HOYLE ,  Benjamin Jason MERRIFIELD ,  Stephen Lindsey TOCKNELL ,  Paul ANDREWS

IPC: B23Q17/24 ,  B24B49/12 ,  G01B11/02

CPC classification number: B23Q17/2457 ,  B23Q17/2485 ,  B24B49/12 ,  G01B11/02 ,  B23Q2717/00

Abstract: An improved method is described for measuring a dimension (e.g. diameter) of a non-toothed tool, for example a grinding tool such as a diamond coated burr. The method may be implemented on a machine tool, such as a lathe, machining centre or the like. The method comprises passing a beam of light from a transmitter to a receiver. The receiver produces a received intensity signal related to the intensity of received light. Analysis of variations in the received intensity signal is performed when a rotating tool is moved relative to the light beam to enable a dimension of the tool to be measured. In particular, it may be determined when the received intensity signal has crossed a threshold for at least a defined duration, the defined duration being less than the time taken for one complete rotation of the tool.

公开(公告)号：US20210385364A1

公开(公告)日：2021-12-09

申请号：US17432014

申请日：2020-03-11

Applicant: RENISHAW PLC

Inventor： Graham Richard FERGUSON ,  Stephen Lindsey TOCKNELL

IPC: H04N5/225 ,  B23Q17/00 ,  H04N5/235

Abstract: An optical tool measurement device for a machine tool is described. The device includes a light source for directing light towards a tool-sensing region and a sensor for detecting light from the tool-sensing region. A shutter assembly for selectively protecting the sensor from contamination is also provided. The shutter assembly is to provide a closed configuration in which the sensor is covered by the shutter assembly thereby preventing contamination of the sensor and an open configuration in which light can pass to the sensor through a first aperture of the shutter assembly. Furthermore, the shutter assembly is configured to additionally provide a constricted configuration in which light can pass to the sensor through a second aperture of the shutter assembly, the second aperture being smaller than the first aperture. In this manner, the device has enhanced resistance to contaminants, such as swarf and coolant, present in the machine tool environment.

公开(公告)号：US20210207981A1

公开(公告)日：2021-07-08

申请号：US17205505

申请日：2021-03-18

Applicant: RENISHAW PLC

Inventor： Finlay Jonathan EVANS ,  James Reynolds HENSHAW ,  Stephen Lindsey TOCKNELL ,  Richard David James GEARING

IPC: G01D5/347

Abstract: A sealed encoder module for mounting onto a machine so as to measure relative displacement of first and second parts of the machine. The sealed encoder module can comprise, a scale, a readhead comprising a scale signal receiver, and an integral protective housing which encapsulates at least the scale and said scale signal receiver. The sealed encoder module can be configured to determine and output diagnostic information regarding a scale signal detected by the readhead.

公开(公告)号：US20210123774A1

公开(公告)日：2021-04-29

申请号：US17128875

申请日：2020-12-21

Applicant: RENISHAW PLC

Inventor： Finlay Jonathan EVANS ,  James Reynolds HENSHAW ,  Stephen Lindsey TOCKNELL

IPC: G01D5/347

Abstract: An encoder apparatus comprising a scale and a readhead assembly comprising a scale signal receiver. The scale and the scale signal receiver are located within a protective housing which is configured to protect them from contamination located outside the protective housing and comprises a seal through which the scale signal receiver can be connected to a part outside the protective housing. The arrangement of the scale signal receiver inside the protective housing is independent of the scale and protective housing.

公开(公告)号：US20180356261A1

公开(公告)日：2018-12-13

申请号：US15775961

申请日：2016-12-01

Applicant: RENISHAW PLC

Inventor： Finlay Jonathan EVANS ,  James Reynolds HENSHAW ,  Stephen Lindsey TOCKNELL

IPC: G01D5/347

CPC classification number: G01D5/34753 ,  G01D5/34715 ,  G01D5/34761 ,  G01D5/34776

Abstract: An encoder apparatus comprising a scale and a readhead assembly comprising a scale signal receiver. The scale and the scale signal receiver are located within a protective housing which is configured to protect them from contamination located outside the protective housing and comprises a seal through which the scale signal receiver can be connected to a part outside the protective housing. The arrangement of the scale signal receiver inside the protective housing is independent of the scale and protective housing.