Special:
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[DAT] (requires LDraw-compatible viewer)
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Subject:
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Re: Problem with click hinge part(s)?
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Newsgroups:
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lugnet.cad.dat.parts
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Date:
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Sun, 20 Jun 2004 15:41:33 GMT
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3091 times
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In lugnet.cad.dat.parts, Ross Crawford wrote:
> In lugnet.cad.dat.parts, Chris Dee wrote:
> > In lugnet.cad.dat.parts, Ross Crawford wrote:
> > > In lugnet.cad.dat.parts, Chris Dee wrote:
> > > > In lugnet.cad.dat.parts, Joel Hoornbeek wrote:
> > > > > I'm working on modeling a recent creation in MLcad, and noticed that
> > > > > there is a difference in the height of the .dat versions of these parts:
> > > > > <http://www.peeron.com/inv/parts/30386
> > > > > <http://ldraw.org/library/official/images/47/30386.png>>
> > > > >
> > > > > <http://www.peeron.com/inv/parts/30387
> > > > > <http://ldraw.org/library/official/images/47/30387.png>>
> > > > >
> > > > > When they are lined up side-by-side, the click hinge portions do not line
> > > > > up. This picture is saved from MLcad, and shows the problem:
> > > > > <<http://www.brickshelf.com/gallery/ClassicSmiley/Temp/hingeproblem.gif>>
> > > > >
> > > > > Has anyone else noticed this?
> > > > >
> > > > > -Joel
> > > > > P.S. This is the fourth time I've tried to post this... Let's hope I
> > > > > get the confirmation e-mail this time.
> > > >
> > > > Joel
> > > >
> > > > Thanks for bringing this to our attention. I'll do what I can to correct
> > > > the official part library in the next parts update.
> > >
> > > without measuring, just by sight, I'd say the 1x2 is the incorrect one,
> > > it's lugs should be moved up to match the 1x4
> > >
> > > ROSCO
> >
> > Actually its the other way about. 30387 is wrong. More accurately, the
> > subpart s/30387s01.dat does not match the guidance notes in p/clh1 and
> > p/clh4.
> >
> > 0 // Placement on side of bricks; rotate accordingly,
> > 0 // place on side 10 Ldu below top surface.
> >
> > I've uploaded a corrected version to the parts tracker
> > http://www.ldraw.org/cgi-bin/ptdetail.cgi?f=parts/s/30387s01.dat
>
> OK Chris, I've gotta disagree here - I just measured a representative sample
> of my click hinges, and the lugs are ALL closer to the top of vertical end
> wall than the bottom. The position of the lug in your new version is
> definitely incorrect. Whether thats a problem with the primitive or the
> sub-part I don't know, but it definitely needs changing.
>
> ROSCO
We are both partially right - but there is a generic problem with these parts.
The important dimension is the position of the axis of rotation of the click
hinge, relative to the brick. For the geometry to work this must be the same
distance down (+y) from the top surface of the brick as it is across (+x) from
the end of the brick.
And this dimension needs to be 10LDu for the following configuration to work,
which it does:
0 Untitled
0 Name: tr30386.dat
0 Author: MLCad
0 Unofficial Model
1 7 0 0 0 1 0 0 0 1 0 0 0 1 30386.DAT
1 7 60 0 -20 1 0 0 0 1 0 0 0 1 30386.DAT
1 7 40 -8 -10 1 0 0 0 1 0 0 0 1 3795.DAT
1 7 40 40 0 0 -1 0 1 0 0 0 0 1 30386.DAT
1 7 40 40 -20 0 -1 0 -1 0 0 0 0 -1 30386.DAT
0
So the position of the click hinges are now correct in the revised s/30387s01 on
the Parts Tracker.
What is wrong (on all of these click hinge bricks) and why you see what you do,
is the dimensions of the diagonal chamfer below the click hinges. These are 1LDu
too large, decreasing the visible surface of the end wall confounding your
measurements.
I'm not sure how this slipped through the parts review process (especially as we
have updated these all once already), but I'll work on the revisions and post
here when I've something to show.
Chris
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Message has 1 Reply:
Message is in Reply To:
 | | Re: Problem with click hinge part(s)?
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| (...) my click hinges, and the lugs are ALL closer to the top of vertical end wall than the bottom. The position of the lug in your new version is definitely incorrect. Whether thats a problem with the primitive or the sub-part I don't know, but it (...) (20 years ago, 10-Jun-04, to lugnet.cad.dat.parts, FTX)
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