Hi Dennis,
As I explained: "I usually start out designing and assembling things using
Mate constraints. Later I add fastener holes, as required, remove the
Mate/Flush constraints." Unless I misunderstood, you also have to align
your parts in some way before you add the holes. I assume you don't do this
visually, as this could impact the accuracy of how other things align. So
I'm not sure what you mean when you say: "When I'm constraining holes, I
never use the mate constraints... Why create twice the constraints in a
design?" Fasteners are the glue that hold things together. When loads are
calculated, that is what determines how many fasteners, and where they are
placed. Therefore I assume you must have to always include mate or flush
constraints as an interim step. Otherwise it might become a problem with
complex assemblies, because if the fastener constraints ever become removed
for any reason there is the danger that it could impact many other parts
making recreation of relative part positions impossible.
My issue is that when I use the software's Measure tool, after I've aligned
with an insert constraint and an Angle constraint, for example, the second
set of holes lines up perfectly using full precision. Therefore I shouldn't
have to use the Angle constraint. But I have found, on a couple of
occasions, that this is necessary. This is not a big issue, but it is
curious, because the parts fail to mate with 2 Insert constraints when there
is no calculable error between the holes. It also detracts from progress,
since the reasons for the failure have to be tracked down for significance.
The above is the reason I asked if there is any way to adjust the software's
precision for constraining parts to exclude the occasional times when mating
errors occur. Usually I create hole patterns off of the hole pattern of
another using the Geometry Projection tool. Then I remove all Adaptive and
Reference listings from the Browser followed by constraining the holes with
dimensions to lock the holes in position. My reason for doing this is to
keep the files as lean as possible. Maybe this is where the errors creep
in.
Wally
"Dennis Jeffrey" wrote in message
news:5749204@discussion.autodesk.com...
When I'm constraining holes, I never use the mate constraints... Why create
twice the constraints in a design? My insert constraints always work unless
there is an error in the spacing. If you need to constrain two parts and
there is an error, then use one insert and a single angle. If I had errors,
the I would take the time to find them.
Since you cannot share any parts for an example, it would be impossible for
anyone here to see where you are going wrong.
--
Dennis Jeffrey, Autodesk Inventor Certified Expert
Autodesk Manufacturing Implementation Certified Expert.
260-399-6615
Instructor/Author/Sr. App Engr.
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"Wally" wrote in message
news:5749180@discussion.autodesk.com...