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bnoll1-Visitor
1-Visitor
July 13, 2016
Question

Drawing View Orientation - 1st vs 3rd Angle (Globally)

  • July 13, 2016
  • 1 reply
  • 6332 views

Today my company has the requirement to create multiple drawings of the same model to support 1st and 3rd angle projection requirements in multiple factories.  I am seeking others input as to how companies may have handle this situation as it is duplicate work.  While a config option change allows for new view to be created in a different orientation, it does not update or change those views already on the drawing.

This seems quite simple as globally the company should decide on one angle of precision, but are there other options?  I have heard the term "declared" views, but ASME Y14.3 does not specify the use of these, nor can I find documentation online to support this theory.  Maybe they are technically known as something else?

Just looking for other opinions or suggestions.

Thanks much!

Brian


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1 reply

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RonSt.Pierre12-Amethyst
12-Amethyst
July 13, 2016

First of all, a model does not have defined "views", only the drawing does.

With that being said, it is conceivable to create two separate drawings that point to the same model.

One drawing could use a first angle.dtl while the other uses a thirdangle.dtl.

Units could possible be troublesome if they need to be different...

There is a third option - view arrow method.

ron

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RonSt.Pierre12-Amethyst
12-Amethyst
July 13, 2016

found it...

viewarrowmethod.png

B
23-Emerald III
BenLoosli23-Emerald III
23-Emerald III
July 13, 2016

The issue with using a single projection type, be it 1st or 3rd angle or arrows, is the end users have become trained/used to seeing the drawing in a certain orientation. We had issues at a prior company when we went to a single 3rd angle projection and the european plant had to adjust to reading the drawings differently as they were used to 1st angle. While the software and ISO/ASME standards may allow a single view orientation to be applied globally, the standards do not take into consideration the of decades of using a certain method in the plant. Training is one method to remind the people using the drawings that this is the new method, how do you handle the existing drawings being used for current production. This would have the people reading them having to check each drawing to be sure they have the proper view orientation in their mind for every drawing. Redrawing all current production drawings to the new orientation method is not practical or cost effective.

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