Chain

[Srimongka]

is it the roller chain generator or is it called something else and can we use the sprockets for the gears instead of the ones that are generated already in the roller chain generator because it keeps creating a new gear for it

[lynca]

The roller chain generator default in Inventor has a few quirks.
I suggest using one of thee 3rd party auto chain generator if you are having trouble.

http://www.sdotson.com/viewparts.php...20transmission
(check out the link with rollerchain.zip)
Let me know if you have trouble getting it to work

[pearldrumzach]

Hey guys... Just wondering, can anyone tell me how they constrained a chain using the .ipt files in the KoP for their drawings? I've never done chain before... only belts. I personally don't like the chain generator in Inventor (I mean, the chain looks like a belt...), and was wondering if anyone knew how to go about using .ipt files and making/constraining the chain. I've created a chain with the correct amount of links and everything... I just don't know where to go from there (I tried constraining it and got frustrated when it wouldn't work after a good hour)
Thanks!

-Zach

[lynca]

Originally Posted by pearldrumzach

I've created a chain with the correct amount of links and everything... I just don't know where to go from there (I tried constraining it and got frustrated when it wouldn't work after a good hour)

Which model did you use to create the chain (post a link to the model)?

If you made your own custom model chain ipt file, please post the file so others can understand how to help.

[JD Mather]

In an ipt file create a sketch for the path of the chain (actually I think the DAcc already does this for you).

In the ipt with the path create a workpoint on the path.

Use the Rectangular Pattern command (should be called Curve Driven

Pattern - where often the "curve" is a straight line) to pattern the workpoint but the center-to-center distance of the chain link (pitch).

In the assembly constrain one link to the first two workpoints on the path.

In the assembly use Pattern Component and use the "Rectangular Pattern" feature of the Workpoints to pattern the rest of the chain links.

http://www.chiefdelphi.com/forums/at...9&d=1200330921

[pearldrumzach]

I used the chain .ipt files in the Kit of Parts files downloaded from FIRSTbase.

JD - I created a chain, with the correct number of links. I am just unsure how to go about constraining it within the whole assembly of the robot. Is there any way I can make the chain "work" (I don't know the real word for it, but by "work" I mean can I constrain it in any way to where the chain will turn when the sprocket turns in the assembly)?

Thanks for the help, guys.

[Team1710]

Just wondering if there is a way to replace the beltish look of the chain generator. Honestly it doesn't look like chain at all. Plus our team uses ANSI 35 chain and the generator only has ANSI 40 for the smallest chain. Does anyone know how we could use ANSI 35 in the generator?

[JD Mather]

Originally Posted by pearldrumzach

JD - I created a chain, with the correct number of links. ...Is there any way I can make the chain "work"

Do not create all of the links.
You need only one roller link and one pin link (depending on the type of chain used - I haven't looked at the supplied).

Create an ipt with the path (actually I think the DAcc does this for you).
Create one workpoint on the path.
Use the Curve Driven Pattern tool (missed named - Rectangular Pattern) to pattern the workpoint at the correct pitch around the path.
(see http://home.pct.edu/~jmather/AU2006/MA13-3%20Mather.pdf - not exactly the same thing so don't get confused, but it should get you going)

Then in the assembly place the one (or two) links as needed and constrain to the points. Then use Pattern Component using the point pattern to drive the palcement of the rest of the links around the path.

To actually animate the movement of a chain is more difficult than I can explain here.

[Team1710]

Originally Posted by JD Mather

Do not create all of the links.
You need only one roller link and one pin link (depending on the type of chain used - I haven't looked at the supplied).

Create an ipt with the path (actually I think the DAcc does this for you).
Create one workpoint on the path.
Use the Curve Driven Pattern tool (missed named - Rectangular Pattern) to pattern the workpoint at the correct pitch around the path.
(see http://home.pct.edu/~jmather/AU2006/MA13-3%20Mather.pdf - not exactly the same thing so don't get confused, but it should get you going)

Then in the assembly place the one (or two) links as needed and constrain to the points. Then use Pattern Component using the point pattern to drive the palcement of the rest of the links around the path.

To actually animate the movement of a chain is more difficult than I can explain here.

This method is amazing! We're definately going to use this. Thanks a bunch!

[lynca]

Originally Posted by lynca

The roller chain generator default in Inventor has a few quirks.
I suggest using one of the 3rd party auto chain generator if you are having trouble.

http://www.sdotson.com/viewparts.php...20transmission
(check out the link with rollerchain.zip)
Let me know if you have trouble getting it to work

Above is another option that looks better as a chain than the Roller Chain Generator.

[pearldrumzach]

Originally Posted by JD Mather

Do not create all of the links.

Create an ipt with the path (actually I think the DAcc does this for you).
Create one workpoint on the path.
Use the Curve Driven Pattern tool (missed named - Rectangular Pattern) to pattern the workpoint at the correct pitch around the path.
(see http://home.pct.edu/~jmather/AU2006/MA13-3%20Mather.pdf - not exactly the same thing so don't get confused, but it should get you going)

Then in the assembly place the one (or two) links as needed and constrain to the points. Then use Pattern Component using the point pattern to drive the palcement of the rest of the links around the path.

I tried this; I created the .ipt with the path, and made a workpoint. However, when I tried to array the point, it said that you are unable to array work features (I've been trying to work on chain at school and not cut into my time at the robotics shop experimenting with it, and we only have 2008 on our school computers; is that part of my problem with arraying?). Thanks for all the help.

Originally Posted by lynca

The roller chain generator default in Inventor has a few quirks.
I suggest using one of thee 3rd party auto chain generator if you are having trouble.

http://www.sdotson.com/viewparts.php...20transmission
(check out the link with rollerchain.zip)
Let me know if you have trouble getting it to work

I've got everything set correctly in the Excel spreadsheet, and I can see the links when I mouse over them in the browser, but how do I make the chain visible?

Thanks for the help guys.

-Zach

[JD Mather]

Originally Posted by pearldrumzach

when I tried to array the point, it said that you are unable to array work features...
-Zach

Are you doing Rectangular Pattern in ipt? Zip and attach what you have so far.