Calypso TP

[[Mi...]]

Whats the difference in Align Of Feature and Base Alignment in the true position box??

When I go in and ask for a TP calypso seems to default to Align To Feature.

Never really paid much attention to it until today. I do not use a lot of TP around here...

[[Jo...]]

I've not noticed that. In case you haven't seen this feature, You can select your Datums, and then "save as" a named set. After that, it will be in the drop down menu.

[[Cr...]]

Align to feature will automatically pull whatever alignment you have called to for that feature.

[[Mi...]]

Sounds good.

I just leave it on Align to feature then....

[[Ri...]]

Unless you properly build the alignment using the can/may/must rule, then you will possibly see differences between alignment of feature and if you manually built the DRF.

Also typically the Base Alignment doesn't follow OTE and/or ISO5459.

[[Jo...]]

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Richard, is there a provision for custom DRF ? I think ASME Y 14.5-2009 onwards allows it, but I don't see how to implement that without using alignment to do so.

[[Ri...]]

No - you would have to use an alignment to achieve that.

I am not opposed to people using alignments for their Positions/Profiles - I do it a lot myself.

I just see a lot of people, fresh or not using the Base Alignment as their DRF and their Base Alignment is not built correctly to match their DRF as noted on the drawing.