A method of finding a feature using a machine tool

A machine tool, application and installation technology, applied in the field of scanning measurement tools to identify objects, can solve the problems of long measurement time and slow measurement process

Active Publication Date: 2015-10-21
RENISHAW PLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of applying such a system is that the measuring process is relatively slow and thus requires a long measuring time if a large number of measuring points is required

Method used

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  • A method of finding a feature using a machine tool
  • A method of finding a feature using a machine tool
  • A method of finding a feature using a machine tool

Examples

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Embodiment Construction

[0048] refer to figure 1 , shows a machine tool installation 2 comprising a machine tool 4 , a controller 6 , a PC 8 and a transmitter / receiver interface 10 . The machine tool 4 includes a motor (not shown) for moving a spindle 12 holding a dummy probe 14 relative to a workpiece 16 positioned on a table 15 . The position of the spindle 12 (and thus the analog probe 14) is precisely measured in a known manner using an encoder or the like. This measurement provides spindle position data defined in the machine coordinate system (x, y, z). A numerical controller (NC) 18 (which is part of the controller 6 ) controls the x, y, z movement of the spindle 12 in the working area of ​​the machine tool and also receives data on the position of said spindle.

[0049]As will be appreciated, in alternative embodiments, relative motion in any or all of the x, y, z dimensions may be provided by motion of the table 15 relative to the spindle. Furthermore, relative rotational motion of simula...

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PUM

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Abstract

A method of finding a feature of an object using an analogue probe mounted on a machine tool. The method includes the analogue probe and/or object following a course of motion which causes the analogue probe's surface sensing region to traverse across the feature to be found a plurality of times whilst approaching the feature over successive traverses so as to ultimately arrive in a position sensing relationship with the feature so as to collect scanned measurement data about the feature along at least part of a traverse.

Description

technical field [0001] The invention relates to a method for identifying objects, in particular to a method for identifying objects by using a scanning measurement tool installed on a coordinate positioning device. Background technique [0002] It is known to mount a measuring probe in a machine tool spindle for movement relative to a workpiece in order to measure said workpiece. In practice, the probe is typically a touch trigger probe, eg as described in US Patent No. 4,153,998 (McMurtry), which generates a trigger signal when the probe's stylus touches the workpiece surface. The trigger signal is obtained for a so-called "jump" input to the numerical controller (NC) of the machine tool. In response, the relative motion of the object and workpiece is stopped, and the controller takes an instantaneous reading of the machine's position (ie, the position of the spindle and probe relative to the machine). This is obtained from the machine's measuring device, such as an encod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/04G05B19/401B25J9/16
CPCG01B7/012G01B21/045
Inventor 约翰·奥尔德凯温·戴特
Owner RENISHAW PLC
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