drawing decimal places for metric dimensions?

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- wonginator71
  
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posted
16 years ago

Tue, Jun 12, 2007 5:00 PM

Hi to all,

Noticed something weird with showing metric dimensions in drawings, and was wondering if there is a fix for it, or some config setting.

If I want to show a dimension of 21.00mm, Pro/E seems to want to shorten this to 21mm, chopping off the two decimal places. This seems to only happen with metric dimensions, and only if the numbers after the decimal point are zeroes. This happens no matter how many decimal places I set within the Properties box.

Obviously, if the numbers are anything other than zero, they are displayed correctly. But when they are zero, they are removed by Pro/ E.

Is there a way to display these zeroes in metric? The same problem doesn't occur with English units.

Any info or advice is appreciated.

Thanks.

Lee

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- Andy
  
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posted
16 years ago

Tue, Jun 12, 2007 5:16 PM

It may be a .DTL file option. Take a look at "lead_trail_zeros" and "lead_trail_zeros_scope"

Andy

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- wonginator71
  
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posted
16 years ago

Tue, Jun 12, 2007 6:27 PM

Andy, thanks for the quick reply. Your answer was right on, I had to adjust the "lead_trail_zeros" option from its default setting to "both" in the .DTL file.

Thanks a lot. :-)

Lee

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- Ben Loosli
  
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posted
16 years ago

Wed, Jun 13, 2007 12:07 AM

Before you go and change the behavior of the system, look at the standards that your company uses to define how a drawing is to be interpreted. ASME Y14.5m-1995 says that metric dimensions do NOT use trail zeros after the decimal place. Just because you want it to look one way, doesn't make it correct.

Ben

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- David Janes
  
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posted
16 years ago

Fri, Jun 15, 2007 12:04 AM

Before you go and change the behavior of the system, look at the standards that your company uses to define how a drawing is to be interpreted. ASME Y14.5m-1995 says that metric dimensions do NOT use trail zeros after the decimal place. Just because you want it to look one way, doesn't make it correct.

Ben

Agreed! Those dimensioning with US Customary Units got away with a quick and dirty shotcut to tolerancing with the default tolerance based on number of decimal places. Therefore, a half inch, to tolerance .0003 had to be displayed as .5000, a comparable number of trailing zeros (and the plus/minus sign), making the dimesion display incredibly long. Thus the reluctance to use anything but the default tolerances. ISO makes the dimension and tolerance display as simple as possible AND encourages whole number MM dims making it much less odious to EXPLICITLY tolerance every dimension: no decimal place shortcut to tolerancing with ISO. AND no confusion over tolerances when a decimal place is inadvertently dropped because zeros are truncated automatically.

David Janes