Enhancement; nut and bolts to fit when 3D printed and user adjustments

[ldboehm]

Currently when 3d printing parts with nuts and bolts, they don't fit together. Some testing shows the nut need to be scaled upward by 110% when printing, then they fit on the bolt thread. Standard nuts will fit a bolt properly.

enhancement requests

• Nuts and bolts should work together virtual or printed by default.
• Nice to have would be allow some tuning by the user for thread pitch, thread clearance (size the threads up or down a little bit and head size. (hex nut)
• If you wanted to get fancy; add different head types like, philips, torx, star, etc.

[shaise]

Nuts and bolts are mechanically accurate on CAD. 3D printers add some inaccuracies that makes it not fit that well.
The following fork lets you tinker the sizes of the thread to make it work for 3D printers:
https://github.com/wieck/FreeCAD_FastenersWB/tree/scaling
you can find a discussion in the following thread:
https://forum.freecadweb.org/viewtopic.php?f=8&t=26159&p=207570&hilit=3d+printed+bolt#p207570
I do not understand you third bullet: you can do pretty much any head type you want with this workbench.

[ldboehm]

Hi Shai, Thanks for the response. 3D printing technology and printers has advanced greatly, so saying that it introduces inaccuracies toward what users are experiencing is not the correct way to state that. There are lots of things in this world that started off on paper that needed tuning to match the real world. My printer is very new, and it does an amazing job with the things I print. Some car manufacturers have announced that they are moving all parts to be created via 3D printing. The manufacturing industry is changing from 3D printing. I read through the thread you provided and seems their findings are similar to mine, scaling the part when printing is needed to make it fit right. The discussion says the bolt was scaled down to .98 and the nut scaled up to 1.05. I've seen other discussions that use the 1.08 scale. In these examples and in the thread, the parts are very simple. If the part were much more complex, then having to scale the entire part would affect all aspects of the part and that could introduce other design issues. I find the bolt is correct, but the nut needs to be scaled larger during the print process. I found that scaling to 110% gave me the desired outcome and the nut fits snug to the bolt. What that means is I had to enlarge the entire nut to make it fit right. If I and others have to scale down and/or scale up the part during the print process to make it work, then I'd argue that there is change to be made in fasteners workbench design. If you're not going to entertain reviewing how these parts match up for printing since mathematically they line up, then I'd suggest creating some type of tunable attribute within the workbench so a user can scale the nut, bolt, or clearance of the thread, so the part can be used as it was designed without having to scale it when printing. Thanks -Larry

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On Sat, Sep 29, 2018 at 4:52 PM Shai Seger ***@***.***> wrote: Nuts and bolts are mechanically accurate on CAD. 3D printers add some inaccuracies that makes it not fit that well. The following fork lets you tinker the sizes of the thread to make it work for 3D printers: https://github.com/wieck/FreeCAD_FastenersWB/tree/scaling you can find a discussion in the following thread: https://forum.freecadweb.org/viewtopic.php?f=8&t=26159&p=207570&hilit=3d+printed+bolt#p207570 I do not understand you third bullet: you can do pretty much any head type you want with this workbench. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or mute the thread.

[shaise]

As Said, You can use the modified workbench (first link above) and play with thread sizes (it will only affect the thread, not other dimensions) I have been using that myself and even 3D printed functional M3 (!) bolts and nuts on my Prusa MK3 3D printer. shai

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On Sun, Sep 30, 2018 at 1:52 AM ldboehm ***@***.***> wrote: Hi Shai, Thanks for the response. 3D printing technology and printers has advanced greatly, so saying that it introduces inaccuracies toward what users are experiencing is not the correct way to state that. There are lots of things in this world that started off on paper that needed tuning to match the real world. My printer is very new, and it does an amazing job with the things I print. Some car manufacturers have announced that they are moving all parts to be created via 3D printing. The manufacturing industry is changing from 3D printing. I read through the thread you provided and seems their findings are similar to mine, scaling the part when printing is needed to make it fit right. The discussion says the bolt was scaled down to .98 and the nut scaled up to 1.05. I've seen other discussions that use the 1.08 scale. In these examples and in the thread, the parts are very simple. If the part were much more complex, then having to scale the entire part would affect all aspects of the part and that could introduce other design issues. I find the bolt is correct, but the nut needs to be scaled larger during the print process. I found that scaling to 110% gave me the desired outcome and the nut fits snug to the bolt. What that means is I had to enlarge the entire nut to make it fit right. If I and others have to scale down and/or scale up the part during the print process to make it work, then I'd argue that there is change to be made in fasteners workbench design. If you're not going to entertain reviewing how these parts match up for printing since mathematically they line up, then I'd suggest creating some type of tunable attribute within the workbench so a user can scale the nut, bolt, or clearance of the thread, so the part can be used as it was designed without having to scale it when printing. Thanks -Larry On Sat, Sep 29, 2018 at 4:52 PM Shai Seger ***@***.***> wrote: > > Nuts and bolts are mechanically accurate on CAD. 3D printers add some inaccuracies that makes it not fit that well. > The following fork lets you tinker the sizes of the thread to make it work for 3D printers: > https://github.com/wieck/FreeCAD_FastenersWB/tree/scaling > you can find a discussion in the following thread: > https://forum.freecadweb.org/viewtopic.php?f=8&t=26159&p=207570&hilit=3d+printed+bolt#p207570 > I do not understand you third bullet: you can do pretty much any head type you want with this workbench. > > — > You are receiving this because you authored the thread. > Reply to this email directly, view it on GitHub, or mute the thread. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#31 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AFi1QCE21vKxYcsoz4fsp3TfQkxtLruYks5uf_mQgaJpZM4XAm46> .

[ldboehm]

My apologies, I missed that. I am confused though, do I just re-install the workbench, or do I have to install this branch somehow, and if so how?

…

On Sat, Sep 29, 2018 at 4:52 PM Shai Seger ***@***.***> wrote: Nuts and bolts are mechanically accurate on CAD. 3D printers add some inaccuracies that makes it not fit that well. The following fork lets you tinker the sizes of the thread to make it work for 3D printers: https://github.com/wieck/FreeCAD_FastenersWB/tree/scaling you can find a discussion in the following thread: https://forum.freecadweb.org/viewtopic.php?f=8&t=26159&p=207570&hilit=3d+printed+bolt#p207570 I do not understand you third bullet: you can do pretty much any head type you want with this workbench. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#31 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ApfQhalp_wqEnqeNj1cTuuymzte3vV4bks5uf92hgaJpZM4XAm46> .

[shaise]

Hi, It can not be installed automatically. you should go to the link, click the green "clone or download" button, and download the zip file. Then go to the folder where the original files are installed (on windows it should be "C:\Users\<user name>\AppData\Roaming\FreeCAD\Mod\fasteners") and unzip and overwrite with the altered version shai

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On Sun, Sep 30, 2018 at 7:03 PM ldboehm ***@***.***> wrote: My apologies, I missed that. I am confused though, do I just re-install the workbench, or do I have to install this branch somehow, and if so how? On Sat, Sep 29, 2018 at 4:52 PM Shai Seger ***@***.***> wrote: > Nuts and bolts are mechanically accurate on CAD. 3D printers add some > inaccuracies that makes it not fit that well. > The following fork lets you tinker the sizes of the thread to make it work > for 3D printers: > https://github.com/wieck/FreeCAD_FastenersWB/tree/scaling > you can find a discussion in the following thread: > > https://forum.freecadweb.org/viewtopic.php?f=8&t=26159&p=207570&hilit=3d+printed+bolt#p207570 > I do not understand you third bullet: you can do pretty much any head type > you want with this workbench. > > — > You are receiving this because you authored the thread. > Reply to this email directly, view it on GitHub > < #31 (comment) >, > or mute the thread > < https://github.com/notifications/unsubscribe-auth/ApfQhalp_wqEnqeNj1cTuuymzte3vV4bks5uf92hgaJpZM4XAm46 > > . > — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#31 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AFi1QIYHUtXYR43mio7nrZqpaShbWtdvks5ugOtZgaJpZM4XAm46> .

[ldboehm]

I'm running MacOS High Sierra and I can't figure out where FreeCAD is stored! Any idea?

…

On Sun, Sep 30, 2018 at 1:33 AM Shai Seger ***@***.***> wrote: As Said, You can use the modified workbench (first link above) and play with thread sizes (it will only affect the thread, not other dimensions) I have been using that myself and even 3D printed functional M3 (!) bolts and nuts on my Prusa MK3 3D printer. shai On Sun, Sep 30, 2018 at 1:52 AM ldboehm ***@***.***> wrote: > Hi Shai, > Thanks for the response. > > 3D printing technology and printers has advanced greatly, so saying > that it introduces inaccuracies toward what users are experiencing is > not the correct way to state that. There are lots of things in this > world that started off on paper that needed tuning to match the real > world. > > My printer is very new, and it does an amazing job with the things I > print. Some car manufacturers have announced that they are moving all > parts to be created via 3D printing. The manufacturing industry is > changing from 3D printing. > > I read through the thread you provided and seems their findings are > similar to mine, scaling the part when printing is needed to make it > fit right. The discussion says the bolt was scaled down to .98 and the > nut scaled up to 1.05. I've seen other discussions that use the 1.08 > scale. In these examples and in the thread, the parts are very > simple. If the part were much more complex, then having to scale the > entire part would affect all aspects of the part and that could > introduce other design issues. I find the bolt is correct, but the > nut needs to be scaled larger during the print process. I found that > scaling to 110% gave me the desired outcome and the nut fits snug to > the bolt. What that means is I had to enlarge the entire nut to make > it fit right. > > If I and others have to scale down and/or scale up the part during the > print process to make it work, then I'd argue that there is change to > be made in fasteners workbench design. If you're not going to > entertain reviewing how these parts match up for printing since > mathematically they line up, then I'd suggest creating some type of > tunable attribute within the workbench so a user can scale the nut, > bolt, or clearance of the thread, so the part can be used as it was > designed without having to scale it when printing. > > Thanks > -Larry > > On Sat, Sep 29, 2018 at 4:52 PM Shai Seger ***@***.***> > wrote: > > > > Nuts and bolts are mechanically accurate on CAD. 3D printers add some > inaccuracies that makes it not fit that well. > > The following fork lets you tinker the sizes of the thread to make it > work for 3D printers: > > https://github.com/wieck/FreeCAD_FastenersWB/tree/scaling > > you can find a discussion in the following thread: > > > https://forum.freecadweb.org/viewtopic.php?f=8&t=26159&p=207570&hilit=3d+printed+bolt#p207570 > > I do not understand you third bullet: you can do pretty much any head > type you want with this workbench. > > > > — > > You are receiving this because you authored the thread. > > Reply to this email directly, view it on GitHub, or mute the thread. > > — > You are receiving this because you commented. > Reply to this email directly, view it on GitHub > < #31 (comment) >, > or mute the thread > < https://github.com/notifications/unsubscribe-auth/AFi1QCE21vKxYcsoz4fsp3TfQkxtLruYks5uf_mQgaJpZM4XAm46 > > . > — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#31 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ApfQhcoOeyPaW9yglnc4fd8bw8NdrC6Uks5ugFemgaJpZM4XAm46> .

[shaise]

you should try and ask on the freecad forum:
https://forum.freecadweb.org/

[shIxx01]

Hi,
the fork (link above) can not be found via addon manager. There is only your FastenersWB. But you should find the fork according to its installation instructios in addon manager. However, manual instalation works and the WB is available in the dropdown list in Freecad. but if I also install your WB now, it behaves strange. The icon of the fork will be displayed, but your WB (where you can not scale) will load.
So both WB can not coexist (and yes, they are in different folders).

Please fix this issue so both Fastener WB'scan coexist in the addon manager and also in freecad

[shaise]

The latest version supports 3D printed bolts and nuts. See
https://forum.freecadweb.org/viewtopic.php?f=8&t=26159&start=20#p282313

[luzpaz]

@shaise what's left in this ticket?

[shaise]

dont know. I think the issue is solved

[luzpaz]

@ldboehm hi, it's been a minute 😉
Do you mind looking over this ticket and checking if it's fully satisfied and report back so we know what is its status?

[ldboehm]

Feel free to close it. IMHO adjusting thread size and width should be in the automatically updated Workbench.
Having to download code and overwrite manually isn't the greatest user experience.

[shaise]

@ldboehm , this feature exists in the formal, updated, Workbench

[luzpaz]

@shaise thanks for weighing-in. If issues are closed, please consider closing them. Thanks!

[ldboehm]

Closing