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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet Mongrel
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<blockquote data-quote="Chris Launders" data-source="post: 89373" data-attributes="member: 2010"><p>One problem I have found with these modern gizmo's is that if you give someone a drawing and they copy it unless they're careful it gets smaller and if that person copies it, it gets smaller again. Someone once sent me a drawing for an engine plate (about 8" long) which I copied and gave to a friend (who's friend could get laser cutting done) who copied it and gave it to the laser cutter. Result, 6 pairs of engine plates 3/8" too short.</p><p>That's when I learnt about this problem. </p><p>By the way my local patternmakers will only work off hard copies of drawings and will insist the customer verifies the drawing is correct.</p><p>I've had it happen even where I've given them a drawing and told them "it needs to be this size, bring me one before doing a run" and the prototype was still too small, when I laid it on the drawing and it didn't match the only reply was I don't know how that happened, I do, not knowing what they're doing !!!</p></blockquote><p></p>
[QUOTE="Chris Launders, post: 89373, member: 2010"] One problem I have found with these modern gizmo's is that if you give someone a drawing and they copy it unless they're careful it gets smaller and if that person copies it, it gets smaller again. Someone once sent me a drawing for an engine plate (about 8" long) which I copied and gave to a friend (who's friend could get laser cutting done) who copied it and gave it to the laser cutter. Result, 6 pairs of engine plates 3/8" too short. That's when I learnt about this problem. By the way my local patternmakers will only work off hard copies of drawings and will insist the customer verifies the drawing is correct. I've had it happen even where I've given them a drawing and told them "it needs to be this size, bring me one before doing a run" and the prototype was still too small, when I laid it on the drawing and it didn't match the only reply was I don't know how that happened, I do, not knowing what they're doing !!! [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet Mongrel
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