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Starting in version V4.3, Feature Control Frame (FCF) flatness uses a Tchebychev algorithm. Legacy flatness still uses the Least Squares method.
Starting in V4.3, the FCF flatness algorithm was modified to use a min/max calculation (in conformance with both ISO 1101 and ASME Y14.5). This generally gives a somewhat smaller flatness value than the least squares flatness. The legacy flatness still uses the least squares flatness for all versions of PC-DMIS. This calculation is independent of the UseISOCalculations setting.

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[url="http://www.dimcax.com"]几何尺寸与公差标准[/url]

2009-11-12, 10:56 AM	#2
huangyhg 超级版主注册日期: 04-03 帖子: 18592 精华: 36 现金: 249466 标准币资产: 1080358888 标准币	回复: Flatness - Legacy and err non legacy? Starting in version V4.3, Feature Control Frame (FCF) flatness uses a Tchebychev algorithm. Legacy flatness still uses the Least Squares method. Starting in V4.3, the FCF flatness algorithm was modified to use a min/max calculation (in conformance with both ISO 1101 and ASME Y14.5). This generally gives a somewhat smaller flatness value than the least squares flatness. The legacy flatness still uses the least squares flatness for all versions of PC-DMIS. This calculation is independent of the UseISOCalculations setting. __________________ 借用达朗贝尔的名言：前进吧，你会得到信心! [url="http://www.dimcax.com"]几何尺寸与公差标准[/url]