kmanstudios 1,120
Can you post a piece of this stl to examine and where this file came from?
Can you post a piece of this stl to examine and where this file came from?
Thank you gentlemen:
Here is the STL (it was reduced from 134 mb to 25mb STL by makexyz.com) ( file attached) Can supply the original 138 mb file if wanted/needed.. please advise
Oddly the first 3 print tries were very poor but at least it was printing Yesterdays' Slices printed Without any Z .. sigh.
Cura doesn't crash but it does seize up for a few mins, maxing out my i7 processor to 100% in process. So somethings amiss somewhere I suspect.
Here is a Cura file 65mb. I'm wanting to print this 37.2" diameter (real life size) as a 1:12 scale model) so detail will obviously suffer
Ooops . thought It might be useful to submit the Original File.
Bit big tho at 138mbs
OK, got a chance to look at it. You have a few issues with the file. Mostly stemming from being designed for CNC Milling and not for FDM printing.
CNC Milling's objective is to make parts that will then be assembled and have all the working parts designed. Here you can see that the heat sinks (A) for a piston is removed, it has openings for all the parts from rods to piston to spark chambers and when the flywheel is removed (B) you can see it has all the interior structure as well. This is designed to be a working metal engine.
This will give you a few problems to start with.
So, if you enable print thin walls by unhiding options in the preferences, you can get this result.
This will still have the problems of all the internal structure. But all that yellow is Cura trying to compensate for extremely thin walls and will not be a sturdy print.
I removed the Heat Sink portion of a piston and some hosiery (Pun intended) from the model and capped them off. This was not an easy task, but it will show the difference in how it looks for CNC Milling and FDM printing. The capped version of a model can be much printed much quicker due to working on the outside structure and not all the super thin walls and unseen parts. I am including a file that produces this result for you to see the difference like this:
(A) Is the original file. It still has a bit of yellow thin wall to it, but not nearly as much.
(B) Is the same file, but put a small (0.2mm) Horizontal expansion on it in "Per Model Settings" and it perks right up.
One last problem with a file with this thin of edges is that the nozzle size greatly impacted the ability of the sampling process to get the thin details. This file is Cura 3.2.
AA63DP_EngineTroubles.curaproject.3mf
Edited by kmanstudios
Wow... I'm both Flattered and Humbled by your Efforts.. Thank You!
New at this being my only credible excuse :-)
I knew that it was a CNC type file and that It would print all the Internal bits, albeit unnecessarily for my needs, I assumed / thought that was unavoidable baggage.
I'm only after a simple, looks like the real thing facsimile version.. viewed from the outside
Your provided File is interesting.... I had given thought to Printing the individual bits But Frankly had zero idea of how to separate them into pieces I can post printing assemble into my desired model. No idea of how to tho.
IF I could get One Cylinder Complete with it's Valve gear (pushrod is unlikely to print well in any event and a Bit of ali tube/wire could easily be retrofitted)
It's the detail of a Complete Cyl that is all that I'm after/ need tbh.. If it becomes a case of Simplifying.
The crankcase is simply a Hollow can shape devoid of any significant detail.. That I can fabricate manually ...fairly easily .
Thought was that I could print 9 cyl assemblies then glue them onto my diy cranckase
IF? I could trouble you further on this Can you provide some "how to" info on how I might get this file to Print One almost (no pushrod) complete Cylinder?
Regards
Dan,
vancouver canada
Edited by danilo
17 minutes ago, danilo said:Wow... I'm both Flattered and Humbled by your Efforts.. Thank You!
First, you are quite welcome. Second, do not be flattered as I just like to solve problems. Advances my knowledge and helps others. I do this sort of thing here as well as others. I think I jut got to it first
Now, I will have to put on the thinking cap as for the easiest way for you to get to your goals. I mean, most of my knowledge is centered on modeling and some high end programs that are expensive. But I wonder if a few people here could chime in and offer some easy ways to do this.
Edit: What programs and type of modeling are you using now if any? That would help
Erm... None.
As above: Komplete Newbie I'm after an engine model for a 1;12th scale DH2 model (ww1 aircraft) I'm attempting to build.
Tripped over this Le Rhone engine file and was delighted. sadly it's proven not nearly as simple an exercise as I anticipated
Take a look at DesignSpark Mechanical. That would be a great starting place. And it is free!!
Thank.you ! Downloaded it..500 mb a biggie ! Opened and starting to explore it
Cool. I know that a lot of people here like it and since you are looking for engineering on this project, I thought you may take a shot at it.
OK Small issue tho (beyond having to guess where the front door was :-)
It won't let me register? 3 separate Email addy's...3 seperate User names.. said All were in use.. As if
Will try it again a bit later. hoping traffic at least might lessen
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gr5 2,294
If it doesn't crash then it's up to the task.
The problem is almost certainly that there are errors in the model. STL format is just a bunch of unordered triangles. Likely you have wall inside of solids or you have holes in your walls such that cura can't figure out what is inside and what is outside. If you look at the model in xray view you may see some red areas - if so then those are problem areas.
In addition each triangle has a "normal" which indicates which side of the triangle is "inside" and which is "outside" aka touching air.
I would try this - first I would decimate the model a bit so it's easier to work with - this step is optional though:
http://www.shapeways.com/tutorials/polygon_reduction_with_meshlab
Then I would repair the model:
netfabb free repair service is here (but you have to create an account):
https://service.netfabb.com/login.php
Do those two steps and it will probably slice fine. Or at least the second step.
If you created the model yourself and you did it in sketchup then I can give you a guide to repair sketchup models which is a better route (if you plan to make changes to the model later) than using netfabb.
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