constraining a rear pivot cyl and rod end

[Anonymous]

i've been doing a workaround for awhile now, and i guess today i'm finally
ready to fix it... ha ha... i've got iparts for pneumatic cyls we use (ipart
for the cylinder and rod)... when i use a rear pivot cyl, cyl rod, and a rod
end, i can never get them to fully constrain, no matter what order or diff
types of constraints i use.... ex.. take a simple linear slide, moving
freely(unconstrained) insert a rear pivot cyl and rod mt the cyl by its
pivot in the rear, constrain the rod inside of the cyl, place a female rod
end in the assy, constrain it on the cyl rod. Place a connection hole in
the moving part of the linear slide to connect the rod end to. Now try and
constrain the rod end to that hole... won't do it, i can move the slide to
exact postion over the rod end, measure angles and everything no problems.
The workaraound is that when it is in exact position you can sometimes get
the constraint to lock in, but if you stroke the cyl it will blow up. I'm
going to place a sample assy in the cf, i can't find anything wrong with the
parts, i'm thinking that there is some assy constraint flaw in Inventor that
has slipped thru the cracks and people have been working around it instead
of bringing it to attention... I've been doing this kind of thing since R1
and i know it has worked before, so i don't know if it started messing up in
5 or when...but i've been wrong before.... can some of you guys when you
get a chance take a peek at it...
thanks,

--
Brian Land
Mechanical Design
Lorik Tool Inc.

[Anonymous]

The assy did not resolve a few parts. This is what I have. It could not
find:

BOTTOM EJECT SLIDE BAR.ipt
SUPER 6.ipt

Regardless if you are trying to constrain the rod end to one of the parts in
the pattern it won't work as the pattern cannot move freely.
--
Sean Dotson, PE
http://www.sdotson.com
Check the Inventor FAQ for most common questions
www.sdotson.com/faq.html
-----------------------------------------------------------------------
"Brian Land" wrote in message
news:7B75B1AC86EAA1D44062DBCDF08FAAF1@in.WebX.maYIadrTaRb...
> i've been doing a workaround for awhile now, and i guess today i'm finally
> ready to fix it... ha ha... i've got iparts for pneumatic cyls we use
(ipart
> for the cylinder and rod)... when i use a rear pivot cyl, cyl rod, and a
rod
> end, i can never get them to fully constrain, no matter what order or diff
> types of constraints i use.... ex.. take a simple linear slide, moving
> freely(unconstrained) insert a rear pivot cyl and rod mt the cyl by its
> pivot in the rear, constrain the rod inside of the cyl, place a female rod
> end in the assy, constrain it on the cyl rod. Place a connection hole in
> the moving part of the linear slide to connect the rod end to. Now try
and
> constrain the rod end to that hole... won't do it, i can move the slide to
> exact postion over the rod end, measure angles and everything no problems.
> The workaraound is that when it is in exact position you can sometimes get
> the constraint to lock in, but if you stroke the cyl it will blow up. I'm
> going to place a sample assy in the cf, i can't find anything wrong with
the
> parts, i'm thinking that there is some assy constraint flaw in Inventor
that
> has slipped thru the cracks and people have been working around it instead
> of bringing it to attention... I've been doing this kind of thing since R1
> and i know it has worked before, so i don't know if it started messing up
in
> 5 or when...but i've been wrong before.... can some of you guys when you
> get a chance take a peek at it...
> thanks,
>
> --
> Brian Land
> Mechanical Design
> Lorik Tool Inc.
>
>

[Anonymous]

the pattern is completely irrevelant to this situation, it so happens that
the assy that i simplified had a pattern in it... i will send a new assy
file in, something bad happened on the pack and go, my original assy that i
took that cut from got screwed up also, wouldn't resolve the same two
files...

"Sean Dotson" wrote in message
news:2B7DC57FA7A8D38B1865DD70BD632F0F@in.WebX.maYIadrTaRb...
> The assy did not resolve a few parts. This is what I have. It could not
> find:
>
> BOTTOM EJECT SLIDE BAR.ipt
> SUPER 6.ipt
>
> Regardless if you are trying to constrain the rod end to one of the parts
in
> the pattern it won't work as the pattern cannot move freely.
> --
> Sean Dotson, PE
> http://www.sdotson.com
> Check the Inventor FAQ for most common questions
> www.sdotson.com/faq.html
> -----------------------------------------------------------------------
> "Brian Land" wrote in message
> news:7B75B1AC86EAA1D44062DBCDF08FAAF1@in.WebX.maYIadrTaRb...
> > i've been doing a workaround for awhile now, and i guess today i'm
finally
> > ready to fix it... ha ha... i've got iparts for pneumatic cyls we use
> (ipart
> > for the cylinder and rod)... when i use a rear pivot cyl, cyl rod, and a
> rod
> > end, i can never get them to fully constrain, no matter what order or
diff
> > types of constraints i use.... ex.. take a simple linear slide, moving
> > freely(unconstrained) insert a rear pivot cyl and rod mt the cyl by its
> > pivot in the rear, constrain the rod inside of the cyl, place a female
rod
> > end in the assy, constrain it on the cyl rod. Place a connection hole
in
> > the moving part of the linear slide to connect the rod end to. Now try
> and
> > constrain the rod end to that hole... won't do it, i can move the slide
to
> > exact postion over the rod end, measure angles and everything no
problems.
> > The workaraound is that when it is in exact position you can sometimes
get
> > the constraint to lock in, but if you stroke the cyl it will blow up.
I'm
> > going to place a sample assy in the cf, i can't find anything wrong with
> the
> > parts, i'm thinking that there is some assy constraint flaw in Inventor
> that
> > has slipped thru the cracks and people have been working around it
instead
> > of bringing it to attention... I've been doing this kind of thing since
R1
> > and i know it has worked before, so i don't know if it started messing
up
> in
> > 5 or when...but i've been wrong before.... can some of you guys when
you
> > get a chance take a peek at it...
> > thanks,
> >
> > --
> > Brian Land
> > Mechanical Design
> > Lorik Tool Inc.
> >
> >
>
>


----------------------------------------------------------------------------
----

[Anonymous]

okay, sorry about that.... something blew up on the pack and go, i've
reworked the assy and taken the component pattern out... thanks,
bl
"Brian Land" wrote in message
news:7B75B1AC86EAA1D44062DBCDF08FAAF1@in.WebX.maYIadrTaRb...
> i've been doing a workaround for awhile now, and i guess today i'm finally
> ready to fix it... ha ha... i've got iparts for pneumatic cyls we use
(ipart
> for the cylinder and rod)... when i use a rear pivot cyl, cyl rod, and a
rod
> end, i can never get them to fully constrain, no matter what order or diff
> types of constraints i use.... ex.. take a simple linear slide, moving
> freely(unconstrained) insert a rear pivot cyl and rod mt the cyl by its
> pivot in the rear, constrain the rod inside of the cyl, place a female rod
> end in the assy, constrain it on the cyl rod. Place a connection hole in
> the moving part of the linear slide to connect the rod end to. Now try
and
> constrain the rod end to that hole... won't do it, i can move the slide to
> exact postion over the rod end, measure angles and everything no problems.
> The workaraound is that when it is in exact position you can sometimes get
> the constraint to lock in, but if you stroke the cyl it will blow up. I'm
> going to place a sample assy in the cf, i can't find anything wrong with
the
> parts, i'm thinking that there is some assy constraint flaw in Inventor
that
> has slipped thru the cracks and people have been working around it instead
> of bringing it to attention... I've been doing this kind of thing since R1
> and i know it has worked before, so i don't know if it started messing up
in
> 5 or when...but i've been wrong before.... can some of you guys when you
> get a chance take a peek at it...
> thanks,
>
> --
> Brian Land
> Mechanical Design
> Lorik Tool Inc.
>
>

[Anonymous]

Look in iCF for a fixed assy. Under the rod there are two constraints. One
is suppressed. If you want it to stroke manually leave the one suppressed.
If you want it to drive via an insert constraint suppress this one and
unsuppress the Insert.

With multiple degree of freedom systems (like this one) you can get some odd
results (parts flipping etc..)

--
Sean Dotson, PE
http://www.sdotson.com
Check the Inventor FAQ for most common questions
www.sdotson.com/faq.html
-----------------------------------------------------------------------
"Brian Land" wrote in message
news:65AAD3728E4CD6A0769061E4733D6AFF@in.WebX.maYIadrTaRb...
> okay, sorry about that.... something blew up on the pack and go, i've
> reworked the assy and taken the component pattern out... thanks,
> bl
> "Brian Land" wrote in message
> news:7B75B1AC86EAA1D44062DBCDF08FAAF1@in.WebX.maYIadrTaRb...
> > i've been doing a workaround for awhile now, and i guess today i'm
finally
> > ready to fix it... ha ha... i've got iparts for pneumatic cyls we use
> (ipart
> > for the cylinder and rod)... when i use a rear pivot cyl, cyl rod, and a
> rod
> > end, i can never get them to fully constrain, no matter what order or
diff
> > types of constraints i use.... ex.. take a simple linear slide, moving
> > freely(unconstrained) insert a rear pivot cyl and rod mt the cyl by its
> > pivot in the rear, constrain the rod inside of the cyl, place a female
rod
> > end in the assy, constrain it on the cyl rod. Place a connection hole
in
> > the moving part of the linear slide to connect the rod end to. Now try
> and
> > constrain the rod end to that hole... won't do it, i can move the slide
to
> > exact postion over the rod end, measure angles and everything no
problems.
> > The workaraound is that when it is in exact position you can sometimes
get
> > the constraint to lock in, but if you stroke the cyl it will blow up.
I'm
> > going to place a sample assy in the cf, i can't find anything wrong with
> the
> > parts, i'm thinking that there is some assy constraint flaw in Inventor
> that
> > has slipped thru the cracks and people have been working around it
instead
> > of bringing it to attention... I've been doing this kind of thing since
R1
> > and i know it has worked before, so i don't know if it started messing
up
> in
> > 5 or when...but i've been wrong before.... can some of you guys when
you
> > get a chance take a peek at it...
> > thanks,
> >
> > --
> > Brian Land
> > Mechanical Design
> > Lorik Tool Inc.
> >
> >
>
>

[Anonymous]

Sean... what did u do to get it too work?... i tried yours and it worked, i
reopened the one i sent which looks identical and mine won't constrain... i
know you fixed it but... what did u do...

"Sean Dotson" wrote in message
news:DC7E6B016E19941635EBC72583E709CA@in.WebX.maYIadrTaRb...
> Look in iCF for a fixed assy. Under the rod there are two constraints.
One
> is suppressed. If you want it to stroke manually leave the one
suppressed.
> If you want it to drive via an insert constraint suppress this one and
> unsuppress the Insert.
>
> With multiple degree of freedom systems (like this one) you can get some
odd
> results (parts flipping etc..)
>
> --
> Sean Dotson, PE
> http://www.sdotson.com
> Check the Inventor FAQ for most common questions
> www.sdotson.com/faq.html
> -----------------------------------------------------------------------
> "Brian Land" wrote in message
> news:65AAD3728E4CD6A0769061E4733D6AFF@in.WebX.maYIadrTaRb...
> > okay, sorry about that.... something blew up on the pack and go, i've
> > reworked the assy and taken the component pattern out... thanks,
> > bl
> > "Brian Land" wrote in message
> > news:7B75B1AC86EAA1D44062DBCDF08FAAF1@in.WebX.maYIadrTaRb...
> > > i've been doing a workaround for awhile now, and i guess today i'm
> finally
> > > ready to fix it... ha ha... i've got iparts for pneumatic cyls we use
> > (ipart
> > > for the cylinder and rod)... when i use a rear pivot cyl, cyl rod, and
a
> > rod
> > > end, i can never get them to fully constrain, no matter what order or
> diff
> > > types of constraints i use.... ex.. take a simple linear slide,
moving
> > > freely(unconstrained) insert a rear pivot cyl and rod mt the cyl by
its
> > > pivot in the rear, constrain the rod inside of the cyl, place a female
> rod
> > > end in the assy, constrain it on the cyl rod. Place a connection hole
> in
> > > the moving part of the linear slide to connect the rod end to. Now
try
> > and
> > > constrain the rod end to that hole... won't do it, i can move the
slide
> to
> > > exact postion over the rod end, measure angles and everything no
> problems.
> > > The workaraound is that when it is in exact position you can sometimes
> get
> > > the constraint to lock in, but if you stroke the cyl it will blow up.
> I'm
> > > going to place a sample assy in the cf, i can't find anything wrong
with
> > the
> > > parts, i'm thinking that there is some assy constraint flaw in
Inventor
> > that
> > > has slipped thru the cracks and people have been working around it
> instead
> > > of bringing it to attention... I've been doing this kind of thing
since
> R1
> > > and i know it has worked before, so i don't know if it started messing
> up
> > in
> > > 5 or when...but i've been wrong before.... can some of you guys when
> you
> > > get a chance take a peek at it...
> > > thanks,
> > >
> > > --
> > > Brian Land
> > > Mechanical Design
> > > Lorik Tool Inc.
> > >
> > >
> >
> >
>
>

[Anonymous]

I had to delete a lot of constraints and start over. You had a few that
were in conflict with each other if you added the insert. As I said with
multiple degree of freedom assys it's more of an art than a science.

--
Sean Dotson, PE
http://www.sdotson.com
Check the Inventor FAQ for most common questions
www.sdotson.com/faq.html
-----------------------------------------------------------------------
"Brian Land" wrote in message
news:8C69210B9DF02BC4AD691EAEAF6E49DF@in.WebX.maYIadrTaRb...
> Sean... what did u do to get it too work?... i tried yours and it worked,
i
> reopened the one i sent which looks identical and mine won't constrain...
i
> know you fixed it but... what did u do...
>
> "Sean Dotson" wrote in message
> news:DC7E6B016E19941635EBC72583E709CA@in.WebX.maYIadrTaRb...
> > Look in iCF for a fixed assy. Under the rod there are two constraints.
> One
> > is suppressed. If you want it to stroke manually leave the one
> suppressed.
> > If you want it to drive via an insert constraint suppress this one and
> > unsuppress the Insert.
> >
> > With multiple degree of freedom systems (like this one) you can get some
> odd
> > results (parts flipping etc..)
> >
> > --
> > Sean Dotson, PE
> > http://www.sdotson.com
> > Check the Inventor FAQ for most common questions
> > www.sdotson.com/faq.html
> > -----------------------------------------------------------------------
> > "Brian Land" wrote in message
> > news:65AAD3728E4CD6A0769061E4733D6AFF@in.WebX.maYIadrTaRb...
> > > okay, sorry about that.... something blew up on the pack and go, i've
> > > reworked the assy and taken the component pattern out... thanks,
> > > bl
> > > "Brian Land" wrote in message
> > > news:7B75B1AC86EAA1D44062DBCDF08FAAF1@in.WebX.maYIadrTaRb...
> > > > i've been doing a workaround for awhile now, and i guess today i'm
> > finally
> > > > ready to fix it... ha ha... i've got iparts for pneumatic cyls we
use
> > > (ipart
> > > > for the cylinder and rod)... when i use a rear pivot cyl, cyl rod,
and
> a
> > > rod
> > > > end, i can never get them to fully constrain, no matter what order
or
> > diff
> > > > types of constraints i use.... ex.. take a simple linear slide,
> moving
> > > > freely(unconstrained) insert a rear pivot cyl and rod mt the cyl by
> its
> > > > pivot in the rear, constrain the rod inside of the cyl, place a
female
> > rod
> > > > end in the assy, constrain it on the cyl rod. Place a connection
hole
> > in
> > > > the moving part of the linear slide to connect the rod end to. Now
> try
> > > and
> > > > constrain the rod end to that hole... won't do it, i can move the
> slide
> > to
> > > > exact postion over the rod end, measure angles and everything no
> > problems.
> > > > The workaraound is that when it is in exact position you can
sometimes
> > get
> > > > the constraint to lock in, but if you stroke the cyl it will blow
up.
> > I'm
> > > > going to place a sample assy in the cf, i can't find anything wrong
> with
> > > the
> > > > parts, i'm thinking that there is some assy constraint flaw in
> Inventor
> > > that
> > > > has slipped thru the cracks and people have been working around it
> > instead
> > > > of bringing it to attention... I've been doing this kind of thing
> since
> > R1
> > > > and i know it has worked before, so i don't know if it started
messing
> > up
> > > in
> > > > 5 or when...but i've been wrong before.... can some of you guys
when
> > you
> > > > get a chance take a peek at it...
> > > > thanks,
> > > >
> > > > --
> > > > Brian Land
> > > > Mechanical Design
> > > > Lorik Tool Inc.
> > > >
> > > >
> > >
> > >
> >
> >
>
>

[Anonymous]

Hi!

Why wouldn't you make separate subassembly of cylinder parts? Then import
it to main assembly and make it adaptive. You could move piston by driving
constrain under main assembly! You would reach at least two advantages: In
main assembly there would be only one line in bom representing cylinder and
the secondly you could use that same cylinder in other assemblies too
without constaining cylinder parts again.

-Alpo-

[Anonymous]

come on Sean (-: .... i need to walk back through it myself, because
obviously i'm constraining things in a way that Inventor doesn't like
because that cyl-rod thing happens to me all the time... i'm fixing to open
yours back up and see if i can see whats different...

"Sean Dotson" wrote in message
news:2DE9FA1412BA34327E6247D8EF42D395@in.WebX.maYIadrTaRb...
> I had to delete a lot of constraints and start over. You had a few that
> were in conflict with each other if you added the insert. As I said with
> multiple degree of freedom assys it's more of an art than a science.
>
> --
> Sean Dotson, PE
> http://www.sdotson.com
> Check the Inventor FAQ for most common questions
> www.sdotson.com/faq.html
> -----------------------------------------------------------------------
> "Brian Land" wrote in message
> news:8C69210B9DF02BC4AD691EAEAF6E49DF@in.WebX.maYIadrTaRb...
> > Sean... what did u do to get it too work?... i tried yours and it
worked,
> i
> > reopened the one i sent which looks identical and mine won't
constrain...
> i
> > know you fixed it but... what did u do...
> >
> > "Sean Dotson" wrote in message
> > news:DC7E6B016E19941635EBC72583E709CA@in.WebX.maYIadrTaRb...
> > > Look in iCF for a fixed assy. Under the rod there are two
constraints.
> > One
> > > is suppressed. If you want it to stroke manually leave the one
> > suppressed.
> > > If you want it to drive via an insert constraint suppress this one and
> > > unsuppress the Insert.
> > >
> > > With multiple degree of freedom systems (like this one) you can get
some
> > odd
> > > results (parts flipping etc..)
> > >
> > > --
> > > Sean Dotson, PE
> > > http://www.sdotson.com
> > > Check the Inventor FAQ for most common questions
> > > www.sdotson.com/faq.html
> >
> -----------------------------------------------------------------------
> > > "Brian Land" wrote in message
> > > news:65AAD3728E4CD6A0769061E4733D6AFF@in.WebX.maYIadrTaRb...
> > > > okay, sorry about that.... something blew up on the pack and go,
i've
> > > > reworked the assy and taken the component pattern out... thanks,
> > > > bl
> > > > "Brian Land" wrote in message
> > > > news:7B75B1AC86EAA1D44062DBCDF08FAAF1@in.WebX.maYIadrTaRb...
> > > > > i've been doing a workaround for awhile now, and i guess today i'm
> > > finally
> > > > > ready to fix it... ha ha... i've got iparts for pneumatic cyls we
> use
> > > > (ipart
> > > > > for the cylinder and rod)... when i use a rear pivot cyl, cyl rod,
> and
> > a
> > > > rod
> > > > > end, i can never get them to fully constrain, no matter what order
> or
> > > diff
> > > > > types of constraints i use.... ex.. take a simple linear slide,
> > moving
> > > > > freely(unconstrained) insert a rear pivot cyl and rod mt the cyl
by
> > its
> > > > > pivot in the rear, constrain the rod inside of the cyl, place a
> female
> > > rod
> > > > > end in the assy, constrain it on the cyl rod. Place a connection
> hole
> > > in
> > > > > the moving part of the linear slide to connect the rod end to.
Now
> > try
> > > > and
> > > > > constrain the rod end to that hole... won't do it, i can move the
> > slide
> > > to
> > > > > exact postion over the rod end, measure angles and everything no
> > > problems.
> > > > > The workaraound is that when it is in exact position you can
> sometimes
> > > get
> > > > > the constraint to lock in, but if you stroke the cyl it will blow
> up.
> > > I'm
> > > > > going to place a sample assy in the cf, i can't find anything
wrong
> > with
> > > > the
> > > > > parts, i'm thinking that there is some assy constraint flaw in
> > Inventor
> > > > that
> > > > > has slipped thru the cracks and people have been working around it
> > > instead
> > > > > of bringing it to attention... I've been doing this kind of thing
> > since
> > > R1
> > > > > and i know it has worked before, so i don't know if it started
> messing
> > > up
> > > > in
> > > > > 5 or when...but i've been wrong before.... can some of you guys
> when
> > > you
> > > > > get a chance take a peek at it...
> > > > > thanks,
> > > > >
> > > > > --
> > > > > Brian Land
> > > > > Mechanical Design
> > > > > Lorik Tool Inc.
> > > > >
> > > > >
> > > >
> > > >
> > >
> > >
> >
> >
>
>

[Anonymous]

if you did this, then every time you moved the cyl it would change the cyls
position in every other assy that you referenced it in...

"Alpo Siekkinen" wrote in message
news:opro6a8ie5xs4e9c@discussion.autodesk.com...
> Hi!
>
> Why wouldn't you make separate subassembly of cylinder parts? Then import
> it to main assembly and make it adaptive. You could move piston by driving
> constrain under main assembly! You would reach at least two advantages: In
> main assembly there would be only one line in bom representing cylinder
and
> the secondly you could use that same cylinder in other assemblies too
> without constaining cylinder parts again.
>
> -Alpo-

[Anonymous]

also there are no ipart assys right now and my cyls are iparts...
"Alpo Siekkinen" wrote in message
news:opro6a8ie5xs4e9c@discussion.autodesk.com...
> Hi!
>
> Why wouldn't you make separate subassembly of cylinder parts? Then import
> it to main assembly and make it adaptive. You could move piston by driving
> constrain under main assembly! You would reach at least two advantages: In
> main assembly there would be only one line in bom representing cylinder
and
> the secondly you could use that same cylinder in other assemblies too
> without constaining cylinder parts again.
>
> -Alpo-

[Anonymous]

Basically all I did was blow away most of the constraints then...

1. Mate the guide rod axially to the guide block
2. Make and angle constraint between the top of the long part and the top
of the cyl mtg bracket (this will be redundant later)
3. Mate the rod axially to the cylinder
or
4. Insert the rod into the cylinder



--
Sean Dotson, PE
http://www.sdotson.com
Check the Inventor FAQ for most common questions
www.sdotson.com/faq.html
-----------------------------------------------------------------------
"Brian Land" wrote in message
news:62730E3AEF7D9F929341D7FC699EA5F4@in.WebX.maYIadrTaRb...
> come on Sean (-: .... i need to walk back through it myself, because
> obviously i'm constraining things in a way that Inventor doesn't like
> because that cyl-rod thing happens to me all the time... i'm fixing to
open
> yours back up and see if i can see whats different...
>
> "Sean Dotson" wrote in message
> news:2DE9FA1412BA34327E6247D8EF42D395@in.WebX.maYIadrTaRb...
> > I had to delete a lot of constraints and start over. You had a few that
> > were in conflict with each other if you added the insert. As I said
with
> > multiple degree of freedom assys it's more of an art than a science.
> >
> > --
> > Sean Dotson, PE
> > http://www.sdotson.com
> > Check the Inventor FAQ for most common questions
> > www.sdotson.com/faq.html
> > -----------------------------------------------------------------------
> > "Brian Land" wrote in message
> > news:8C69210B9DF02BC4AD691EAEAF6E49DF@in.WebX.maYIadrTaRb...
> > > Sean... what did u do to get it too work?... i tried yours and it
> worked,
> > i
> > > reopened the one i sent which looks identical and mine won't
> constrain...
> > i
> > > know you fixed it but... what did u do...
> > >
> > > "Sean Dotson" wrote in message
> > > news:DC7E6B016E19941635EBC72583E709CA@in.WebX.maYIadrTaRb...
> > > > Look in iCF for a fixed assy. Under the rod there are two
> constraints.
> > > One
> > > > is suppressed. If you want it to stroke manually leave the one
> > > suppressed.
> > > > If you want it to drive via an insert constraint suppress this one
and
> > > > unsuppress the Insert.
> > > >
> > > > With multiple degree of freedom systems (like this one) you can get
> some
> > > odd
> > > > results (parts flipping etc..)
> > > >
> > > > --
> > > > Sean Dotson, PE
> > > > http://www.sdotson.com
> > > > Check the Inventor FAQ for most common questions
> > > > www.sdotson.com/faq.html
> > >
> > -----------------------------------------------------------------------
> > > > "Brian Land" wrote in message
> > > > news:65AAD3728E4CD6A0769061E4733D6AFF@in.WebX.maYIadrTaRb...
> > > > > okay, sorry about that.... something blew up on the pack and go,
> i've
> > > > > reworked the assy and taken the component pattern out... thanks,
> > > > > bl
> > > > > "Brian Land" wrote in message
> > > > > news:7B75B1AC86EAA1D44062DBCDF08FAAF1@in.WebX.maYIadrTaRb...
> > > > > > i've been doing a workaround for awhile now, and i guess today
i'm
> > > > finally
> > > > > > ready to fix it... ha ha... i've got iparts for pneumatic cyls
we
> > use
> > > > > (ipart
> > > > > > for the cylinder and rod)... when i use a rear pivot cyl, cyl
rod,
> > and
> > > a
> > > > > rod
> > > > > > end, i can never get them to fully constrain, no matter what
order
> > or
> > > > diff
> > > > > > types of constraints i use.... ex.. take a simple linear slide,
> > > moving
> > > > > > freely(unconstrained) insert a rear pivot cyl and rod mt the cyl
> by
> > > its
> > > > > > pivot in the rear, constrain the rod inside of the cyl, place a
> > female
> > > > rod
> > > > > > end in the assy, constrain it on the cyl rod. Place a
connection
> > hole
> > > > in
> > > > > > the moving part of the linear slide to connect the rod end to.
> Now
> > > try
> > > > > and
> > > > > > constrain the rod end to that hole... won't do it, i can move
the
> > > slide
> > > > to
> > > > > > exact postion over the rod end, measure angles and everything no
> > > > problems.
> > > > > > The workaraound is that when it is in exact position you can
> > sometimes
> > > > get
> > > > > > the constraint to lock in, but if you stroke the cyl it will
blow
> > up.
> > > > I'm
> > > > > > going to place a sample assy in the cf, i can't find anything
> wrong
> > > with
> > > > > the
> > > > > > parts, i'm thinking that there is some assy constraint flaw in
> > > Inventor
> > > > > that
> > > > > > has slipped thru the cracks and people have been working around
it
> > > > instead
> > > > > > of bringing it to attention... I've been doing this kind of
thing
> > > since
> > > > R1
> > > > > > and i know it has worked before, so i don't know if it started
> > messing
> > > > up
> > > > > in
> > > > > > 5 or when...but i've been wrong before.... can some of you guys
> > when
> > > > you
> > > > > > get a chance take a peek at it...
> > > > > > thanks,
> > > > > >
> > > > > > --
> > > > > > Brian Land
> > > > > > Mechanical Design
> > > > > > Lorik Tool Inc.
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > >
> > > >
> > >
> > >
> >
> >
>
>

[Anonymous]

Yes you are right. That is why i use fixed cylinder model (part in library)
and have separate rod end. Then i bring them to assembly separately and
make insert constrain between cylinder rod and rod end. That insert can i
drive without problems. When the "stroke" is out there is a cap between
cylinder rod and rod end, but who cares? At least i can check movements all
right. If i need assembly drawing showing cylinder when sroke is out, i
simply make a copy of original cylinder for this purpose, and that model
can i use later also. So after years i have two models / cylinder, stroke
in and out.


-Alpo-