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How would you tolerance the channels on this part?
[COLOR=#000000][FONT=Arial]See attached image / print.
Hello. The customer has asked for advice on how to modify/improve the characteristics on this print. The features needing control are the seven [/FONT][/COLOR][B].0255-.0260[/B][COLOR=#000000][FONT=Arial] long, [/FONT][/COLOR][B].0255-.0260[/B][COLOR=#000000][FONT=Arial] deep channels. The profile controls are completely up for modification and in fact need to be changed.[/FONT][/COLOR]
[COLOR=#000000][FONT=Arial]This print invokes ASME Y14.5.[/FONT][/COLOR]
[B]Here is the crux of the issue: [/B][COLOR=#000000][FONT=Arial]The channel size at any 2-point section is critical. However, the overall length of the channels, which is 14 inches, can allow generous straightness deviation, because the mating parts that move through these channels are more like "al dente spaghetti." The same is true for the depth of these channels (any 2-point depth must be .0255-.0260).[/FONT][/COLOR]
[COLOR=#000000][FONT=Arial]How would you tolerance this print to maintain the 2-point .0255-.0260 channel width and depth requirements while allowing these same channels deviation in form, size and orientation over their entire 14 inch length?[/FONT][/COLOR]
[LIST][*]1. Can the independency symbol be utilized here somehow?[/LIST]
[LIST][*]2. Is it sufficient to only include the size tolerance and no geometric control since ASME Y14.5 is invoked, so rule #1 applies?[/LIST]
[LIST][*]3. Can/should profile of a line be used?[/LIST]
[COLOR=#000000][FONT=Arial]Any other thoughts?[/FONT][/COLOR]
[COLOR=#000000][FONT=Arial]Much appreciated.
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