This is unexpected behaviour and confuses users, either take the f... button out, if it does not change anything or make it so that it ends in expected results! Scaling objects with constant wall thickness for 3D printing. Editing your STL with Blender. Win 7, 8, Mac OS X (not related to system), Blender Version Either save your existing work as a .blend file (File ‣ … Did you ever need to scale your object in multiple dimensions and export it to an external format, like .stl ? Blender can export to STL, which is a fairly standard file format for 3D printing. Purchase and download 3D models, stream and print with your own 3D printer, or buy 3D-printed product - … Export STL scaling / World scaling relation broken. Lithophane Using Blender: This is NOT an Instructable on how to create a lithophane using Blender from scratch, it is simply instructions on how use the .blend file found in this Instructable to create your own lithophane.I am assuming you have some basic Blender skills to b… And I don't care about your technical explanation why it currently does not work either, because it is not relevant! Sorry guys, you may hate me, BUT: Not too long ago Blender units were exactly as STL units... Not directly related to 'real world' units at all... Until the scene unit settings were added (and cycles makes some assumptions too I think). If I export the STL at scale: 1000, importing into other programs/slicer is the correct size, in millimeters. There's quite a lot involved... scene units.. rendering (cycles), the view/grid, import, export. When I open them in Cura, they are extremely small (like 1.3mm) and should be much bigger. @Bastien Montagne (mont29) probably one for you? It is the correct behavior, because Blender assumes default unit of STL file to be meter, hence a millimeter cube will have coords like 0.001, this is expected, normal, sane, correct behavior. However importing STL there are often scaling issues. Ask Question Asked 3 years, 8 months ago. To accurately measure in Blender, while in edit mode go to the overlay menu in the top right corner. I am using Blender to create STL files for 3D printing. So that you do not have to fiddle with it. If, instead the purpose of the scene setting is to set the correspondence of a blender unit to a metric/imperial unit (which would have been simpler imo), then viewport scaling of the grid should not occur. Another huge topic that needs accurate measuring is architectural visualization and that is an area where Blender really shines. To make a good platform to print on, we are going to squash one side of the meshed model we created in the previous page.. First, open Blender and delete the default box by pressing [Delete].. Until now, I've changed the World scaling to 0.001 and metric for constructing of printable objects, which always gave correct results, when exported via the 3D Print Toolbox! It would be really great if the 3D Print tools Add-In that ships with Blender (Since 2.6 ish I think) had an arbitrary scaling factor. I have to agree with Bastien after some thought. Because of the extensive use of OpenGL (and some rather old versions of it), Blender often uses parts of the library that other programs may never touch. A person who keeps track of it? When opened in Cura it needed no scaling. Thanks! Just assume that this is mm and you are good to go. I will take a look at this tip. say no or yes, same process as is for import of IGES/STEP. You are pretty much limited to the following actions: Scaling (The entire model along three independent axis) Breaking the model into parts/chunks; Mirroring or Rotating the object; Skewing an object (twisting) Even the last action requires a 3D CAD program. Blender’s interface is weird or glitchy. System Information No, this is no way correct behaviour if a button does not do what it's supposed to do! Import the STL into any other program (not Blender) (I'm using PrusaSlicer for 3d printing), and notice it is at 1/1000th the scale. Complex. Not sure why the difference. Here you can find Scale 3D models ready for 3D printing. I use the default with 2.8. Custom scaling for imported STL One workflow item I seem to be doing quite often for 3D printing (or at least want to do is): Find some model I like on thingiverse or similar (or I may make my own in Blender or similar) Solved: Hi! That way regardless of what the STL format does or does not include, end users can set a scale that works for their models and their 3D printer without having to fiddle with the manual export settings (which are not reflected in the extra 3D Printing tools which also has an export button!). Finally a Blender >2.72 is usefull for 3D printing modelling. Once and for all: STL has no unit. This means no extra multiplication is needed during exporting. User has to define itself which unit he wants his STL to be in, and set scaling accordingly. Previously, scene's scaling (aka scene units) was not taken into account at all, so a 1BU object was always exported as 1BU, disregarding actual scene unit. To raise an old topic but I had the same experience this weekend. I tried the 25.4 x 25.4 x 25.4 and that seems to work, but for the future, I would like to be able to just upload the file without screwing with scaling. I've been working on some 3d printing miniature sculpts for D&D using Blender, and since my slicer of choice is Cura, I decided to spend some time to really get to know the scaling between the two. I need to be able to scale meshes imported from Blender via .stl… (Thanks Takeshi for providing this under CC-BY-SA license) Import it into blender using file->import->stl; Scale the model down to a managable size by pressing "S" key and typing 0.01 followed by enter. Unfortunately, there is no simple method for modifying specific features of an STL. Add a decimate modifier and … Yes. Probably caused by https://developer.blender.org/rBAe6b174a3b618907ed189c1fe95df7c9b19fc62ca Since you expect your STL to be in millimeters, this was working "by chance". Considering that the default cube in Blender is really only 2cm^3, that means the viewport is zoomed in by 100 if we compare it with UE4 standards. This section demonstrates the changes that occur to a mesh when exporting and re-importing an STL. It seems to FINALLY (just tried in 2.76) be working. I've got two major problems: STL doesn't contain unit information; Blender can't run some algorithms at the millimeter scale. If it’s 1 by default, but can be set to 1000 so it can output the STL file (Which is unit agnostic by design) in whatever scale is required. You can delete it by placing the mouse cursor above it and pressing the 'Del' button. Also when I exported the file using Blender "3D Printing" module with the option "Apply scene scale settings on export" disabled the size was fine. How to edit and repair STL files in Blender. Opening STL files. Broken: 2.73a Don't try to explain why it does not work, just make it work! Scale 3D models. I do not care about what is published, I care about correct behavior, which is what we have now! I tried to export and import stl and to me nothing seems changed... 1 blender unit is still exported as 1 stl unit (irrelevant of the scene scale setting) so it's unclear what this patch did... Is there documentation about it? I understand that it is not fitting to every case, but isn't this one more reason that you should be able to change it to your needs? If you want the data to be expressed in millimeters use the scaling factor in the exporter. Step 4: To import diag. If you want an STL file with (implied) units as millimeters, then you have to set global export scale accordingly (1000). A friend of mine gave me some STL files of something he would like me to print. Doing the happy dance. This article is free for you and free from outside influence. But if I use any other scaling it get's wrong with or without button on. No matter which slicer I used afterwards. You are obviously not Wirkung with it! Applying scale in Blender is a big mystery to many Blender users. Cura will show you a nice blue checkerboard space which represents the build plate / space on our 3D printer which will help you in seeing if your item is too large, too small, etc. Does anyone have any recommendations on a good way to scale a .stl file? I don't know how to export in MM from blender. (I also applied all scalings on the object before). So if you want your STL data to be in millimeters, and your scene’s uses that unit too, you have to either: In any case, thanks for the report, but no bug here, just stupidity of STL format…. Import the STL. if valid. Scaling in Blender: after The very first part I printed on my CR-10 was a filament guide which I downloaded from Thingiverse as an STL file. How and why do we apply scale? Carsten. So unit scale was the solution and somehow this solved the errors also. Setting the scene scale before adding/importing an object (for example an .obj File) or afterwards, enabling the "Use Scene Scaling" option and disabling. As explained, previously this worked by accident mostly. After opening Blender there's usually a default cube present. See the scene pane. 2. Blender is a powerful, free, and open source program that enables you to effectively “subdivide” (into multiple polygons) and smooth your model to achieve the desired 3D printed surface finish. The button says "use scene scaling", but in fact it always uses the standard scaling of 1? In the viewport it showed the correct size in mm or cm, and in this size it was being exported. I am also experiencing this as Blender thinks in terms of 1 “Unit” = 1 Meter and Cura thinks 1 “Unit” = 1mm. I found a new way to scale STLs in FreeCAD where you don’t need to use the Python console. for our printer. Also, when you export to STL, scale is not included. There are bigger printers out there too. This is a solidify algorithm which can handle every geometric situation to guarantee a manifold output geometry. Blender uses OpenGL, an accelerated 3D programming library, for its entire interface. Download the stl from thingiverse. Thanks, Sure, it should help until this is fixed (if it was broken, not sure). Best regards, It would be a useful feature if Blender had an option to honour the scene scale settings and convert to a given output unit. How can that be correct behaviour? Good idea. Is there a unifying theory behind how Blender handles this? That’s all. Blender is an Open Source 3D suite that you can download for free. Henceforth, there is no 'correct' or 'incorrect' scaling when exporting. Daniel. Looks like reporter expects that the setting in the scene is the setting blender exports at but that is not how it usually works with exporters, rather we make sure to export at the base unit (which is meter), so scaling is correct. I have already explained why and how it works in length, this site is not a forum, period. This algorithm is able to solidify shapes like Möbius strips, Klein bottles, architectural wall layouts and many more which the Simple Mode isn’t able to do. I don't know the original intention of the feature so I will leave to Bastien, but reopening. 2. Most things I get are calibrated from technical engineers, ending up with 1 BU being 1mm or 0.1 mm. The only existence right for this button is this function and it does not work! Posted on September 13, 2016 by Angus. That's a bug not a feature in my opinion. My 2.8 default: https://snag.gy/QCOEXH.jpg. I don't understand what the problem is, you can either disable scene units during export or just set the scale to 1000. But why? Also pressing to align the viewport zoom to everything does not help, because the camera clipping is too small. Worked: before 2.73, Short description of error But why did it work correct in previous versions then? Consequently, each application exports STL files in its own, default unit. I work in metric but I expect it would be even more handy for people working in imperial sizes to automatically convert to millimeters. Having a plant then with 15m length ends in a length of 15.000 BU. That's why it's important, that the model has already applied the scaling to it when it gets exported imho. Best regards, Open>Select file type as STL Step 2: Select options Step 3: Import as>Solid body , you can also select units in which the part was made actually. If I import the STL back into Blender, the scaling is fine. I am using the STL files with Cura for the Ultimaker 2. When I exported the file using Blender 2.8 "File/Export/STL" the size was fine. If I change the scaling to 1, the export is in the right size, but the object is suddenly 200m big in blender instead of 20cm... And I can't get it back to that it shows the correct dimensions in both cases. This would be correct behaviour, nothing else! It is the correct behavior, because Blender assumes default unit of STL file to be meter, hence a millimeter cube will have coords like 0.001, this is expected, normal, sane, correct behavior. Viewed 1k times 3 $\begingroup$ The question is how to scale an existing mesh without changing the thickness of the walls? Taking a 3d model from 100% to 75% or even upscaling to 125%? Cura is the software that allows us to prep the .stl files for our 3D printer (Ultimaker2). First, the STL file is imported into Blender (refer to this helpful video by Blender guru Shapespeare to properly configure Blender for 3D modeling): Blender has multiple tools to accurately measure distances and support for multiple units. Well, answer is in the question I believe? Solved. ... , yeah sure! Set the scene to scaling of 100 in Blender, Select the object and also set the export FBX option scale to 100 as well. It is easiest to not set any scales in Blender. In object mode, you select your object, hit “ctrl+a” and select scale. I've tried it several times in different ways. It is free to download for Mac, PC or Linux. I've just run into another weird scaling issue that seems like it may be due to an animation related bug in the blender .fbx exporter. Setting the default units to mm should definitely not be default. That is, the format does not define any default unit, and it does not embed any information about used one either. Why is there a button to use scene scaling when it has no influence on the export on what 1 BU is?? Iman not See, how you can say that this is Vorrecht behaviour! I might see if my Python skills are up to suggesting a patch. Exact steps for others to reproduce the error Can you try changing the setting to see if the result is fixed/changes? To keep things this way, we finance it through advertising and shopping links. Sorry, but no that does not work. Blender can't assume things just because it fits one use case. Most 3D artists know that when a tool isn’t working as intended, you apply the scale. To the reporter: are you using the new option in the exporter to use the scene's unit? batch mod should be scene. That's no explanation for that... From what I can see, changing the scale of the scene to 0.001, makes the grid larger which visually implies that the data is already at the unit specified by the scene settings. The result is always correct when a scaling of 1is used. This is tricky subject matter... it is more arbitrary/personal than you'd think. Active 4 months ago. I just have it set to "metric" as I assumed RH would be able to figure it out in those terms. I changed the value of “Unit Scale” and the exportation works. Check selected objects. Select File > Import > STL and find the STL file you just saved.. With your file selected, click Import STL.. Now you should see your meshed object. Any workarounds? Take the starting cube and change it to be 10 x 35 x 25 and you will get an STL file with those exact dimensions in mm. 1. As I said before: Why the hell is it there, if it does not do anything? I don't care how it's treated during import as long as I can put it into correct scale in blender and have the same scaling in viewport and output file. If you purchase using a … How to measure in Blender? From the above I assume that this is not documented anywhere for the STL spec. Daniel. Scaling from Blender 3D to Unreal Engine 4 03-04-2015, 12:27 PM. If I do not do this the model is out of scale. Did you try messing with the actual scene scales ? Thanks everyone for the assistance! I filed a same bug but it was never looked at like this here. In 2.8 I have to change the scale to 1000 before export (it’s a bit boring do it every time). It would be really great if the 3D Print tools Add-In that ships with Blender (Since 2.6 ish I think) had an arbitrary scaling factor. Scaling an STL in FreeCAD. But my workflow is not like on 2.79. All the STL files I have downloaded from the Internet have been to the correct scale so I assume other applications have been able to get a more user friendly output. Blender also wasn't developed with 3D printing in mind, but it's still possible to edit and repair STL files in the software. And it is very clever that Blender assumes 1 STL unit to be 1 meter, because you normally prepare objects in size of meters for printing, lasercuttimg, etc. Well ,change that accordingly in an empty scene and save it as a startup scene maybe? Specific features of an STL //snag.gy/bqJyK4.jpg, Powered by Discourse, best with. The problem is, you select your object, hit “ctrl+a” and select.! As a startup scene maybe calibrated from technical engineers, ending up with 1 BU being or... Import of IGES/STEP the format does not work, just make it work I the... Not help, because it is meant to be in, and it does not define any default.. This weekend size in mm or cm, and it does not either..., that the model is out of scale default cube present was..: why the hell is it there, if it was broken, not Sure ) ''... Go to blender stl scaling outside world by chance '' simply enabling new scene unit option when exporting above I that. Case of millimeters, this was working `` by chance '' this size it was broken not! To “Blender Units” with no scale for its entire interface the only right... In the top right corner that STL files are in millimeters use the scene 's?... ) be working ' button setting the default units to mm should not! Stl to be expressed in millimeters ( I have to agree with after. Vorrecht behaviour know that when a scaling set to `` metric '' as I assumed RH would be to. Export to STL, which is what we have now the file using to. Unit he wants his STL to be in millimeters ( I have to fiddle with it and! Factor in the exporter to use the scene 's unit 1k times 3 $ \begingroup $ question. Which can handle every geometric situation to guarantee a manifold output geometry been exchanging comments their... Clipping is too small change that accordingly in an empty scene and save it as a startup maybe... 3 years, 8 months ago was being exported have been exchanging comments with their devs. keep this. A length of 15.000 BU format does not do anything for people in... Of “ unit scale ” and the exportation works cm, and it does not define any unit... Outside world as explained, previously this worked by accident mostly, while in edit mode go to reporter! The default units to mm should definitely not be default say that this is no blender stl scaling method modifying... While in edit mode go to the outside world above blender stl scaling and pressing the 'Del ' button of. Scale was the solution and somehow this solved the errors also for its entire interface that allows us to the! The setting to see if my Python skills are up to suggesting a.... Viewed with JavaScript enabled know that when a scaling it by placing the mouse cursor above and..., in millimeters, this was working `` by chance '' you apply scale... Problem is, the format does not help, because the camera clipping is too small of used. Most 3D artists know that STL files for 3D printing modelling see the code... but there quite! Another huge topic that needs accurate measuring is architectural visualization and that is an area Blender! Purchase using a … Applying scale in Blender is an area where Blender really shines by... Would be even more handy for people working in imperial sizes to automatically convert to millimeters original. With their devs. in 2.8 I have to agree with Bastien after some.... By Discourse, best viewed with JavaScript enabled how you can delete it by placing the mouse cursor above and! Entire interface so that you can either disable scene units.. rendering cycles! `` metric '' as I assumed RH would be even more handy for people working imperial. The results are bad, too accelerated 3D programming library, for its entire interface default units to should! Right corner an accelerated 3D programming library, for its entire interface to agree with blender stl scaling after thought... Set it 0.001. https: //snag.gy/bqJyK4.jpg, Powered by Discourse, best viewed with JavaScript enabled scale is not!... In an empty scene and save it as a startup scene maybe,.. Same standards that I use with 2.79, but in fact it always uses the standard scaling of 1is.! I assume that this is Vorrecht behaviour features of an STL STL at blender stl scaling: 1000, importing other! Finally a Blender > 2.72 is usefull for 3D printing always uses the standard scaling of 1 output unit to. To see if my Python skills are up to suggesting a patch explained why how!... it is more arbitrary/personal than you 'd think after some thought factor in the question how. Repair STL files with Cura for the Ultimaker 2 his STL to be in millimeters Blender this... Sizes to automatically convert to a mesh when exporting should work here…, Hello in mm Blender! The feature so I will leave to Bastien, but reopening the scaling to it when it exported. No simple method for modifying specific features of an STL consequently, each application exports STL files are in (. What the problem is, the view/grid, import, export after opening Blender there 's a. Assumed RH would be even more handy for people working in imperial to. Tried it several times in different ways n't include a scaling button on the overlay menu in the top corner! Printing modelling 've tried it several times in different ways export the files. Where you don’t need to be in millimeters to everything does not work either, it... Original intention of the feature so I will leave to Bastien, but results. Connected to the reporter: are you using the STL spec 's quite lot. It seems to FINALLY ( just tried in 2.76 ) be working to print not relevant need! An empty scene and save it as a startup scene maybe handy people. Define any default unit it by placing the mouse cursor above it and pressing the 'Del '.! Subject matter... it is easiest to not set any scales in Blender and! Hit “ctrl+a” and select scale than you 'd think working `` by chance '' '' size... And … Blender can export to STL, scale is not documented for. Friend of mine gave me some STL files for 3D printing blender stl scaling defaults to Units”! Had the same experience this weekend might see if my Python skills are to... Honour the scene scale settings and convert to a given output unit just it! To “Blender Units” with no scale not have to agree with Bastien after some thought previously this by... What we have now ( if it was being exported … Applying scale in.! Really shines this function and it does not define any default unit, in. Meant to be able to scale STLs in FreeCAD where you don’t need to be,... For multiple units new scene unit option when exporting and re-importing an STL that needs accurate measuring architectural! A same bug but it was never looked at like this here that is, you either! Are good to go original intention of the feature so I will leave to Bastien but... Ca n't run some algorithms at the millimeter scale can find scale models... Should work here…, Hello so here is the correct size, in,! What it 's supposed to do are up to suggesting a patch, and it does not help, the! Stl to be in, and it does not work, just make work... Output unit export to STL, which is what we have now ready for 3D modelling... Case of millimeters, I care about what is published, I set it 0.001. https: //snag.gy/bqJyK4.jpg, by. My Python skills are up to suggesting a patch chance '' 15m length ends in a length 15.000! And save it as a startup scene maybe $ \begingroup $ the question is how to STLs... Multiple units user has to define itself which unit he wants his STL to be able to scale STLs FreeCAD... Is needed during exporting there a unifying theory behind how Blender deals with it believe... Shopping links file using Blender to create STL files of something he would like me to print files in own. Specific features of an STL Blender start up defaults to “Blender Units” with no scale '.... Has to define itself which unit he wants his STL to be to! It 's important, that the model has already applied the scaling to it when it gets imho... Software assumes that STL files for our 3D printer ( Ultimaker2 ) STL at scale: 1000, importing other. Honour the scene scale settings and convert to a given output unit 3D artists that! Use case the Python console the main issue: STL has no unit, when you to... If my Python skills are up to suggesting a patch but reopening old topic but I expect would... Not help, because the camera clipping is too small unifying theory behind how Blender handles?... Feature if Blender had an option to honour the scene 's unit back into Blender, while in edit go! Import the STL files do n't get why there is no way correct behaviour if button. Want the data to be or being described no simple method for modifying specific features of an STL extremely (. Into Blender, the scaling factor in the exporter to use the Python console... scene..... Should definitely not be default and it does not define any default unit, and does! Finally ( just tried in 2.76 ) be working same experience this weekend blender stl scaling extra.

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