Cordless Drill - An Additive Loft Example

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rubylion
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Cordless Drill - An Additive Loft Example

Postby rubylion » Sat Dec 14, 2019 6:03 pm

Cordless Drill. The handle was made with many sketches and the additive loft tool.
FreeCAD rules! Thank you so much for creating this software.


Screenshot_20191216_025440.png
Drill with UX
Screenshot_20191216_025440.png (361.8 KiB) Viewed 2233 times


To Kunda1
Please create your own thread in this subforum, if you don't mind. Explain full version of FreeCAD, how did you achieve this, lessons learned etc...

Thank you for your feedback. I have to admit I don't know how to create a thread :oops:
But I thought I can answer your request right here in this post, also not to spam this thread with a lot of entries.


I use FreeCAD now for some years, just for a hobby. Mostley to dig into some Ideas. First Version I used was 0.14. Since then FreeCAD really evolved a lot! One major struggle for me was the big change, when 0.17 came out, and I had to merge old creations or even reconstruct them, because of the way FreeCAD was changed at that time. At first I felt a little helpless, but now I'm glad the developers made this big step forward.
Now I'm using 0.19, which again introduces some astonishing tools (like 'linking',...). This helps tremendousley to realize cool stuff.
So FreeCAD, for me is constant learning and experimenting. Gladly there's this wonderful communitiy of people that's posting own experiences, tutorials, etc...

Now: To the objective 8-) ;)

This Drill, I made more for a presentation for another project. Therefore it is only the body, without the insides. (Anyways, gave me some headaches :mrgreen: )

FreeCAD Version: FreeCAD_0.19-18846-Linux-Conda_Py3Qt5_glibc2.12-x86_64 (Currently the most recent - He he)
Platform :Linux Mint 19.1 - KDE Plasma Desktop - Laptop Intel(R) Core(TM) i7-4720HQ CPU @ 2.60GHz / NVIDIA GTX960M (already an old machine again :roll: )

1 First thing I made was the akkumulator. I didn't use any direct reference, cause I didn't care about originality.

2 To get the handle right I took 2 images of my Cordless Drill and used the Image WB to get them into FreeCAD.
(Of course some image editing was necessary to get rid of the background.To preserve the transparency I used the PNG format for the pictures).

3 Now it was possible to use 2 sketches as guiding lines, while placing the loft-sketches verticaly more or less aligned to them. (For multiple lofting it's quite essential that the sketches are basicaly not too different in form! I mostley used a little transformed routing-sketch-object, )

4 Additive Loft: The Additive Loft Tool lets you extrude from sketch to sketch. Basically it is like connecting cut-throughs of whatever you like to create. There is a diffuculty though. As far as I understand, when you're NOT using the 'Ruled' option, the created faces are smoothed out. BUT, they behave as there is a kind of 'tension' between the cuts. Imagine bending a bamboo stick between some poles.. the more poles you bring in, AND the closer they are, the more tension is on the bamboo. At one point it's not possible to bend it against another pole anymore. In FreeCAD the smoothed out version of the AdditiveLoft is doing quite the same. The more Sketches you bring in, the more it gets missformed. Therefore I used 3 Additive Lofts after one another, while using the last sketch of the earlier Loft to start the next Loft. That's when they (seemingly) connect almost unvisible. The last Additive Loft though kind of misbehaved, and I wasn't able to fix that. So I ended the 2nd AddLft a bit above the 3rd, to have a closed surface.
As far as I understand, there is a 'tension' regulation in the algorythm of AddLfts, that changes (metaphorically speaking: releases the tension), when you use more than 10 sketches. But in my experience I had the impression, that it actually gets much stronger. (Note to the developers: Maybe whatever you mystificialy mathematically do, I guess the operand that controls the average smoothing, should be the opposite of what it is now- just a naively wild guess... furhtermore a regulatory control option for that operand would be totaly cool to have 8-) ).

5 Wellllll,, the rest isn't that wild. To achieve the 2 colors. I copied the whole handle and base part-object and did 2 cuts with the same sketch. One cuts out the lower part and one the upper.
One gets black and one blue. Voila.

6 The rest of the Drill is just some typical basic forms, cuts, polar arrays, etc.. The only thing I like to mention here too, is the very nice makro, called 'circular text', that's available through the add-on installer. With this the numbers were made and aligned to the friction control(?) of the drill.

So that's it. Hopefully I could answer your question.
CordlessDrill_Process.jpg
Creating the Drill
CordlessDrill_Process.jpg (849.8 KiB) Viewed 2233 times
Screenshot_20191216_021656.png
A sight for sore eyes... ;)
Screenshot_20191216_021656.png (221.68 KiB) Viewed 2233 times
Last edited by rubylion on Wed Dec 18, 2019 6:56 pm, edited 3 times in total.
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Kunda1
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Re: call for screenshots - By Yorik

Postby Kunda1 » Sun Dec 15, 2019 1:13 pm

rubylion wrote:
Sat Dec 14, 2019 6:03 pm
Cordless Drill
:o amazing
Please create your own thread in this subforum, if you don't mind. Explain full version of FreeCAD, how did you achieve this, lessons learned etc...
Last edited by Kunda1 on Mon Dec 16, 2019 5:40 pm, edited 1 time in total.
Reason: Split thread in to it's own.
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rubylion
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Re: call for screenshots - By Yorik

Postby rubylion » Mon Dec 16, 2019 2:04 pm

many thanx. Take a look above for your answer. best wishes
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Kunda1
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Re: Cordless Drill

Postby Kunda1 » Mon Dec 16, 2019 5:42 pm

Mod Edit: thread split off in to it's own unique thread.
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mario52
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Re: Cordless Drill - An Additive Loft Example

Postby mario52 » Thu Dec 19, 2019 5:48 pm

hi

beautifull work

6: thanks

mario
Maybe you need a special feature, go into Macros_recipes and Code_snippets, Dialog creation. My macros on Gist.github.
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rubylion
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Re: Cordless Drill - An Additive Loft Example

Postby rubylion » Thu Dec 19, 2019 8:56 pm

Thanx too. So you're the macro-guy :). The macro does a good job. Otherwise it would be quite a pain to get letters arranged in any circular way.
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Kunda1
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Re: Cordless Drill - An Additive Loft Example

Postby Kunda1 » Fri Dec 20, 2019 12:32 am

Truly impressive. Thanks for sharing and revising the post! Hope to see more of your work here. ;)
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rubylion
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Re: Cordless Drill - An Additive Loft Example

Postby rubylion » Fri Dec 20, 2019 2:11 am

OficineRobotica
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Re: Cordless Drill - An Additive Loft Example

Postby OficineRobotica » Wed Jan 08, 2020 7:38 am

Wow , incredible work. Tully beautiful. I have tried my self a similar endevour in freecad but using curves workbench....aaand failed miserably to achieve what i wanted. What I would love to see is a intuitive way of sketching on 3d surfaces so that, for example the black parts of your model can be modeled as what they really are. A 2 mm thick rubber protection on the body of the drill.

Congrats for your work. Inspiring.
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rubylion
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Re: Cordless Drill - An Additive Loft Example

Postby rubylion » Thu Jan 16, 2020 6:47 pm

Hi. Thank you for your respond. To achieve this you could do a simple copy of the handle and scale it once. Then use another copy and substract it via boolean operation. Maybe that helps. Best regards