Having a great time with my Orion. Prints are looking great. I'm having a problem with incorrect sizing, however. My prints are coming out .25mm smaller than designed. I caliper a tube to fit inside a 3d printed object, but the hole created when calipered is always smaller and the tube will not fit.
I've printed out test cubes to measure layer width. When I print with .55 width, it calipers at .55. That seems to be working fine(I'll get a micrometer soon so I can be for sure). I'm not great with editing firmware yet, but this seems like something I can't fix with slic3r settings. The height and width of the actual cube are off by .25mm.
I've worked around it by adding to design, but I know this is the incorrect fix.
Printing smaller than written
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Silentdoom
- Plasticator
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Re: Printing smaller than written
I do have to say that .25mm is a crazy small amount to be talking about. Crazy that within a month I start to worry about fractions of a millimeter! impressive technology.
Adds to my last question: If I add more perimeter, that DOES add it to the inside of the model, correct? Opposed to adding "thickness"?
Adds to my last question: If I add more perimeter, that DOES add it to the inside of the model, correct? Opposed to adding "thickness"?
Re: Printing smaller than written
DELTA_DIAGONAL_ROD can change you're X/Y scaling, and you can fine tune that value to whatever accuracy you want, when aiming for less reasonable levels of accuracy you are likely to end up hitting a few different limiting factors.
That doesn't speak for why you're Z height would be off. I'm forgetting off the top of my head what it is that would do that, but I'm thinking it's something like steps per mm.
I wouldn't go changing any firmware values just yet without more input because this seems to be multi-variable fix.
As for the slicer parameters, that is generally correct although each slicer can behave differently and may have options that determine it's priorities. I know I wouldn't try to predict what any slicer would do if you told it to build a .7mm wall with .3mm wide traces.
That doesn't speak for why you're Z height would be off. I'm forgetting off the top of my head what it is that would do that, but I'm thinking it's something like steps per mm.
I wouldn't go changing any firmware values just yet without more input because this seems to be multi-variable fix.
As for the slicer parameters, that is generally correct although each slicer can behave differently and may have options that determine it's priorities. I know I wouldn't try to predict what any slicer would do if you told it to build a .7mm wall with .3mm wide traces.
Re: Printing smaller than written
There's actually an understood phenomenon with holes in 3D printed parts in all 3D printers, but I can't find the reference right now.
[edit - FOUND IT! http://hydraraptor.blogspot.com/2011/02/polyholes.html ]
g.
[edit - FOUND IT! http://hydraraptor.blogspot.com/2011/02/polyholes.html ]
g.
Delta Power!
Defeat the Cartesian Agenda!
http://www.f15sim.com - 80-0007, The only one of its kind.
http://geneb.simpits.org - Technical and Simulator Projects
Defeat the Cartesian Agenda!
http://www.f15sim.com - 80-0007, The only one of its kind.
http://geneb.simpits.org - Technical and Simulator Projects
Re: Printing smaller than written
Yep, geneb found the link
The best thing to do is to scale up your ID hole in your model
John
The best thing to do is to scale up your ID hole in your model
John
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cope413
- Printmaster!
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Re: Printing smaller than written
I've found that .5mm bigger does the trick very well - so for a 5mm hole, I make it 5.5mm.
Fellow Philosophy majors unite!
"The proverbial achilles heel of property monistic epiphenomenalism is the apparent impossibility of ex-nihilo materialization of non-structural and qualitatively new causal powers."
"The proverbial achilles heel of property monistic epiphenomenalism is the apparent impossibility of ex-nihilo materialization of non-structural and qualitatively new causal powers."
Re: Printing smaller than written
That link makes a-lot of sense for what I've experienced. I didn't go into as deeply as nophead, I just compared two prints from an OpenSCAD piece with $fn of 720 to one of 32 and the smoother high polygon print ended up being worse, which got turned into a mental do-not-do and I hadn't thought about it more than that. Thanks for that gene 