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Old 01-13-2014, 10:00 AM   #11
Bowesmobile
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This is quite the task you've undertaken. I'm a mehanical engineer and have designed on Inventor, AutoCAD, Solid Edge, Unigraphics and Catia V5. So if you get stuck I can probably help you. Also, when you're done with your models would you mind forwarding them to me as IGES or STEP files? I would love to tinker around with them on Solid Edge. Let me know if you need any help. I can probably help you model some items in my spare time if you like. Let me know.
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Old 01-15-2014, 05:49 PM   #12
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Woahhh !! That is patience/perseverance !!! I'm halfway through my degree in mechanical engineering so I could probably help if a problem arise ( I work mainly with Solid Edge and SolidWork ).
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Old 01-27-2014, 07:45 PM   #13
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How do I "constrain" the assembly to keep the pistons as they should be?

I've tried a "directed angle" constraint, piston top vs crank main bearing axis, 90*. No go.
And a few others 90* to the crank centerline. Nothing seems to work as desired.


The wheel is grounded. So when I grab a counterweight I can rotate the assy. FWIW.
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Old 01-27-2014, 08:14 PM   #14
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Quote:
Originally Posted by iminhell View Post
http://i34.photobucket.com/albums/d120/iminhell/inventor/pistonsallover_zpsaeba5077.png

How do I "constrain" the assembly to keep the pistons as they should be?

I've tried a "directed angle" constraint, piston top vs crank main bearing axis, 90*. No go.
And a few others 90* to the crank centerline. Nothing seems to work as desired.


The wheel is grounded. So when I grab a counterweight I can rotate the assy. FWIW.
You can align the bottom or top surface of the piston (assuming its a flat surface somwhere). To the X, Y or Z planes depending on your orientation. Remember to turn off the distance and make it a "floating" distance. This will keep the surfaces parallel. Also if you designed everything on the same center-line it would be good to mate/align the centerlines of the pistons to whatever plane is the centerline of your assembly. Let me know if this helps.

Last edited by iminhell; 02-13-2014 at 12:06 AM.
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Old 01-28-2014, 02:13 PM   #15
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It helped, but wasn't possible the way I took your descriptions.

I ended up drawing a temporary half bore to hold everything straight.
Aligned the piston tops and centerlines.
Aligned my 1/2 bore to my wheel.
Did a tangent on the piston the bore is around.
Works.


I tried to figure out how to animate it and show you/everyone, but that process I haven't mastered yet. Doesn't help that my internet isn't very reliable right now.

I did find out Showcase is too big to run well on my laptop. LOTS of processor required for it, holy cow.
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Old 01-29-2014, 07:52 AM   #16
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Quote:
Originally Posted by iminhell View Post
It helped, but wasn't possible the way I took your descriptions.

I ended up drawing a temporary half bore to hold everything straight.
Aligned the piston tops and centerlines.
Aligned my 1/2 bore to my wheel.
Did a tangent on the piston the bore is around.
Works.


I tried to figure out how to animate it and show you/everyone, but that process I haven't mastered yet. Doesn't help that my internet isn't very reliable right now.

I did find out Showcase is too big to run well on my laptop. LOTS of processor required for it, holy cow.
Thats right you're using Inventor. Sorry had a lapse of the program you're on. Well good to know it gave you a good direction! You're models look good so far. just keep updating your progress. Seems like to are trying to be a little flashy with showing a moving model, lol. Dont worry about that. I'm impressed you've trudged on this far. I haven't done motion on Inventor. But Solid Edge is pretty easy to do and export as a movie file. Can't remember the extension off hand. Keep up the good work and you can add motion after you're done.
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Old 01-29-2014, 08:55 AM   #17
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Inventor just requires a lot of computational power to do the movie. This was 12 years ago but we used it on a program to make a 30 second clip of a robot we had physically built move around and perform "actions". I am sure the tool for 3D movie and manipulation has greatly improved since then.
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Old 02-01-2014, 01:59 AM   #18
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Damn, awsome work so far!
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Old 02-13-2014, 12:10 AM   #19
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There is the top view of the exhaust ports as they are right now. I don't like how they turned out though.
The short side radius is too long/tall, they don't merge quite right (at about the right point though) and I need to figure out how to flatten the bottom at the exit.

Used the "Sweep" option to build them. Kind of a PITA. You have to use 3 planes to get the shape that I have now.
I'm thinking to get it just the way I want I'm going to have to use at least 5. Real tedious. But you can make some really intricate shapes.
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