Was told sketchup is bad for 3d printing
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Bence çok iyi.
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Good morning to all of you.
Is SketchUp performing well to produce STL gear files? -
Although I have been using SU for near a decade now, I will only be getting a 3D printer in July/August, so I'm no expert on 3D printing. But I have done a lot of research on the subject.
The thing to remember in creating SU models that will print well is IMHO attention to detail.
SU is a surface modeller. Any curve is a series of straight line vectors, they are not the smooth curves you see if the model is smoothed. That smoothness is only an illusion via the SU display s/w.
The printer prints in straight lines, very small straight lines, but nothing is a true curve. So to get a reasonably smooth curve in the printer you need the curve divided into a lot of segments. SU default is 24 segments in a 360 degree circle. Great for small curves, but large curves may need 120 segments. That I think may be the reason some prints come out less than desired.
The other critical thing is the bead size the printer is making. The current standard .4mm so any feature Lines or curve segments) in the model that is less than .4mm will not print well, if at all. You can get print nozzles as small as .15mm, but that will really slow down a slow print to begin with. So making curves requires a minimum segment size no less than the nozzle size.
You need to preview the final model in SU with hidden and smoothed lines turned off before you output the STL file. That is what the print will/should look like.
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Hello guys,
I am new to forum as well as sketch. I started it as a hobby and little into it, I understood that I am liking it. Tried few basic stuff and printed it out But I am having real problems with the scale. the scale is hard and please if anyone can suggest how to set up scale for the 3D print. -
@emilia27 said:
Tried few basic stuff and printed it out But I am having real problems with the scale. the scale is hard and please if anyone can suggest how to set up scale for the 3D print.
What version of SketchUp are you using? Your profile says 2018 Free/Make and you are using Linux. There is no such version of SketchUp that supports Linux. Help us help you by giving us the correct information.
In SketchUp you would normally use real world dimensions. For some models with very tiny detail I find it easier to work by treating millimeters and meters. That is, if something is 10mm long in reality, I model it 10 m long. When importing the exported .stl file you just need to set the import units to millimeters.
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Further to my previous reply, I forgot a very important parameter to set in SU.
Model scale.
For the size most printers can make, you need curves with very short segments, but SU doesn't work well with very short lines, especially at the high resolution most printers are capable of.
So you need to use a large scale for the drawing. Then in your slicer scale it down to life size.
The simplest way is to go metric for the drawing, and draw in centimetres, where 1 cm is 1 mm printed. A 10:1 scale that is easy to visualize and compute. It is just a simple mental moving of the decimal point in your measurements.
I know it is tough for North Americans to work in metric. Even for me, in Canada, which is supposedly metric, but not us old folks. I only use metric for 3D print designs. F.P.S everything else.
Then all you need to do is set the slicer at a 10:1 ratio and print. No complex ratio conversion math.
One other thing. For curves in your model, such as bearing mounts, gear teeth, use a high number of segments. That will allow a smoother fit. Same with bolt holes that are not threaded by the bolt. For screws and bolt holes that are force threaded by the screw/bolt, go with larger segments, I use 12 for a full circle. That will give a bit more thread bite in the final part, so fewer segments in the hole are not critical.
Where curve surface smoothness is not important, use large segments. That will also speed up the printing a fair bit.
Finally, you really need to experiment with practice parts at various segment sizes, nozzle sizes and slicer parameters before printing for real.
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Yes, quite true, especially for really small printed stuff.
But for me, divide by 10 is mentally far easier than divide by 1,000. -
Our methods are the same, just the scale is different. For what I am doing I need to mentally imagine the item at true full size from the measurements I see in SU. 10:1 is easier for me.
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I do exactly the same thing.
I just need to visualize the object in real size. If I needed to extrude something 6 mm I just pull up 6.
No mental math involved unless I have a real world object whose dimensions are in inches and I have to model it. Then I use a calculator, (inch to mm), again, no mental math.
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Hi guys. I'm new to the forum, but I already have a little experience with sketchup. My question is probably more practical. Will it be convenient to use sketchup in the development of 3D models for a 3D printer? I recently bought it, and now I have a question - should I continue working in sketchup or master some new program like 3dsmax.
I just read several articles about 3D printers, about their device, about nozzles, filaments and much more. But I don't have a clear understanding if I can continue working in sketchup normally, or will it be a "pain"?
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Your output on the printer will only be as good as the input file. Whether that file is made in SketchUp or Max or Maya is not the issue.
Prints fail because of user error and/or unfamiliarity with the printer itself. It is best to test, test, test.
Also having a understanding of what type of mesh works well for a print is important. There are extensions that help identify issues.
Baby steps and SketchUp will be your best friend
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@annanikolson said:
Hi guys. I'm new to the forum, but I already have a little experience with sketchup. My question is probably more practical. Will it be convenient to use sketchup in the development of 3D models for a 3D printer? I recently bought it, and now I have a question - should I continue working in sketchup or master some new program like 3dsmax.
I just read several articles about 3D printers, about their device, about nozzles, filaments and much more. But I don't have a clear understanding if I can continue working in sketchup normally, or will it be a "pain"?
I have been 3D printing already 3 years and I am using pretty much only Sketchup for modeling the 3D printed parts. Sketchup works really well if you plan to print functional parts. In some cases I have been using some other 3D modeling software but this has been mainly when I have downloaded some parts from Thingiverse and I have needed to make some modifications.
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