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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Camshaft
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<blockquote data-quote="Deleted member 3831" data-source="post: 105095"><p>Sorry folks, but I don't work in half measures, and measuring cam profiles or valve lifts at 5 degree increments and 3 places of decimals, guestimating the fourth data figure is not my way of working. </p><p>If you want to compare cam profiles, you need data for every degree of rotation, even the base circle, and to an accuracy of at least 6 decimal places. My linear encoder reads data to eight decimal places, and the rotary encoder to 1/60 th of a degree if necessary. I am not interested in loaning this equipment out to anyone.</p><p></p><p>I design cams for race engines, but I have measured cams for friends and others where a detailed record of a profile was wanted. I did such an exercise some years ago for members of the Aerial club, they arranged to send me cams, some coming from distant parts of the world, and after measuring all the profiles, they have now a complete set of data for each profile, in a form that can be used for the manufacture of new cams should ever the club decide they are needed.</p><p></p><p>With elderly cams, some wear usually has to be allowed for, and inevitably some of the old designs left much to be desired. Problems of this kind were eased by using modern smoothing methods, while leaving the original character of the design more or less intact.</p><p></p><p>If anyone would care to send me one of these Andrews cams, I will measure it and then return it with a data file in S96 format, which can be opened in Notepad or Wordpad to view the data, or in an additional R file, which contains full manufacturing data.</p></blockquote><p></p>
[QUOTE="Deleted member 3831, post: 105095"] Sorry folks, but I don't work in half measures, and measuring cam profiles or valve lifts at 5 degree increments and 3 places of decimals, guestimating the fourth data figure is not my way of working. If you want to compare cam profiles, you need data for every degree of rotation, even the base circle, and to an accuracy of at least 6 decimal places. My linear encoder reads data to eight decimal places, and the rotary encoder to 1/60 th of a degree if necessary. I am not interested in loaning this equipment out to anyone. I design cams for race engines, but I have measured cams for friends and others where a detailed record of a profile was wanted. I did such an exercise some years ago for members of the Aerial club, they arranged to send me cams, some coming from distant parts of the world, and after measuring all the profiles, they have now a complete set of data for each profile, in a form that can be used for the manufacture of new cams should ever the club decide they are needed. With elderly cams, some wear usually has to be allowed for, and inevitably some of the old designs left much to be desired. Problems of this kind were eased by using modern smoothing methods, while leaving the original character of the design more or less intact. If anyone would care to send me one of these Andrews cams, I will measure it and then return it with a data file in S96 format, which can be opened in Notepad or Wordpad to view the data, or in an additional R file, which contains full manufacturing data. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Camshaft
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