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Karol-Or
Posts: 261
Registered: ‎11-28-2011
Message 1 of 10 (407 Views)
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Dimension in drawing not accurate

407 Views, 9 Replies
11-03-2013 03:44 AM

The diametric dimension on the right, dia. 244.9 isn't resembling the real dimension in the weldment.

You see in the sketch of extrusion 2 that i gave an internal diameter of 245.

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blair
Posts: 3,634
Registered: ‎11-13-2006
Message 2 of 10 (383 Views)

Re: Dimension in drawing not accurate

11-03-2013 07:55 AM in reply to: Karol-Or

Unable to open your assembly and drawing file but I suspect you have set your dimension styles to 0 decimal places for you drawing.

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Karol-Or
Posts: 261
Registered: ‎11-28-2011
Message 3 of 10 (366 Views)

Re: Dimension in drawing not accurate

11-03-2013 10:51 AM in reply to: blair

no, i didn't set the accuracy in the drawing to 0 decimal places, it is for 1 place.

Some other dimensions in this drawing also became a bit smaller, at about 0.1, like this one.

It seems the part, in the drawing, is shrinked a little in the Y direction.

Also the hatch in the section view is incomplete, it doesn't reach the boundary at a place.

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blair
Posts: 3,634
Registered: ‎11-13-2006
Message 4 of 10 (352 Views)

Re: Dimension in drawing not accurate

11-03-2013 03:05 PM in reply to: Karol-Or

Do a Pack-and-Go to get all the files. Open Windows Explorer and locate the IDW, RMB on the IDW and select the Pack-and-Go to collect all the files and zip them.

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IV2015 PDSU / Sim Mech 2015 /
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Distinguished Contributor
Karol-Or
Posts: 261
Registered: ‎11-28-2011
Message 5 of 10 (339 Views)

Re: Dimension in drawing not accurate

11-03-2013 10:47 PM in reply to: blair
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blair
Posts: 3,634
Registered: ‎11-13-2006
Message 6 of 10 (334 Views)

Re: Dimension in drawing not accurate

11-03-2013 10:58 PM in reply to: Karol-Or

Your "Primary Unit" was set to 0 decimal places. The Tolerance was set to multi decimal places.Capture.JPG

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IV2015 PDSU / Sim Mech 2015 /
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*Expert Elite*
Posts: 25,288
Registered: ‎04-20-2006
Message 7 of 10 (319 Views)

Re: Dimension in drawing not accurate

11-04-2013 02:26 AM in reply to: blair

Blair - did you check the Sketch2 dimension (I forget whether it was in Prep or Machining) in the Weldment.

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Distinguished Contributor
Karol-Or
Posts: 261
Registered: ‎11-28-2011
Message 8 of 10 (300 Views)

Re: Dimension in drawing not accurate

11-04-2013 05:29 AM in reply to: JDMather

Not the accuracy is the problem, i entered a round 250 diameter dimension in the model, and you can see it if you open the sketch in the part.

All the diametric dimensions in this drawing are shrinked a bit, but not the horizontal dimensions

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jtylerbc
Posts: 826
Registered: ‎09-01-2010
Message 9 of 10 (289 Views)

Re: Dimension in drawing not accurate

11-04-2013 06:09 AM in reply to: Karol-Or

Karol-Or wrote:

All the diametric dimensions in this drawing are shrinked a bit, but not the horizontal dimensions



Are you sure that your section line on the drawing is passing directly through the center?  If not, that could cause the diameters to appear slightly smaller (since you're not cutting at the full diameter), while not affecting the linear dimensions.

John Tyler
Inventor 2013
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Posts: 25,288
Registered: ‎04-20-2006
Message 10 of 10 (272 Views)

Re: Dimension in drawing not accurate

11-04-2013 07:33 AM in reply to: jtylerbc

jtylerbc wrote:
Are you sure that your section line on the drawing is passing directly through the center? 

Good catch!

These two holes do not share the same center line.

The cutting plane is 5mm left of the center.

 

 

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