FreeCAD: Quick Parametric Handle for Moka Coffee Pot in Curves Workbench from Photo for 3D Printing
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- Опубликовано: 30 сен 2024
- #FreeCAD , #CAD, #3DPrinting
Viewers question and answers to creating a quick simple handle using the multiloft tool in FreeCAD in the Curves workbench from a single png photo. This is for 3D printing a replacement handle for a Coffee pot rather than sending it to landfill. The guide teaches how to utilise the transparency of a png image and the section view to make the profiles that build up the handle from just a few sketches. Learn how to use FreeCAD to scale a image to the needed dimensions, create faces from sketch, rotate and move them into position and create a surface over the profiles. The handle is fully parametric allowing you to modify each of the sketches to add creases, flats, curves, fillets and chamfers.
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Thanks for the video. I do have a question. Once I'm okay with the multiloft I created, how do I make a 'body' out of it so I can use the partdesign toolbox?
You can import it directly into part design by making it a base feature. Create your multiloft as you have done, enter the part design workbench and first select the multiloft and whilst it's selected select the new body icon. A base feature will be created in the treeview within your body and you can carry on modelling in PartDesign. Hope that helps.
I am practicing this program by designing parts of a radio controlled aircraft. thank you for your video tutorial.
Can u make tutorial about making fishing lure in freecad?
Yes will do, a number of people have asked me to create a tutorial on the same subject
@@MangoJellySolutions it would be great sir.
Thankyou
Fantastic! Thank you!!
A question if is possible : after done the multi loft is there a method to thickness the object?
As in hollowing out to add thickness to the walls? You could add this into the profile ie if you want the handle with a open back. The other way is to use a subtractive sweep
@@MangoJellySolutions ok thanks
Hi,
Great work. A query:
Can we add rails(sketched baplines) along the outer periphery of image and use them as rails along with profile faces to get the perfect shape.
Regards
Thanks for the comment, glad you liked. Funny you should say that I am working on a tutorial exactly for that. In my curves workbench mini series I have a video around 10 days away that explains how to to use the hybrid curves. This is exactly what you need. I am working as we speak on the example video as it was going to be a two video release. One explaining the tool and the second modelling something with it. I am tempted to release the example video this week as I have had additional requests and I always go over using the tool again. I am trying to catch up with a lot of viewers questions so I think I will release it as soon as its done which should be this week.
@@MangoJellySolutions Hi,
Thank you for responding. I would like to know if it is possible to specify tangency conditions at side rails. For example if the profiles are normal to sketch plane, the generated surface be normal at everywhere along sides to the image plane.(or maybe tangent G1, G2 to a specified adjoining surface on both left and right)
Splendid, thank you. Very close to an approach I tried, but from its description multi loft isn’t intended for this, so i used something else. When/why would you choose multi loft over the other similar tools?
I saw the pictures you posted and you wouldn't be able to tell you printed it yourself. Glad to see repair rather than repurchase, and also giving the object a story with a homemade handle. In answer to your question it depends on the modelling approach. If you are doing a cross sectioned approach then you go for something like pipe shell or multi loft. This has its advantages if you don't want a seam. If its something that you can open up to get to the inside by undoing say a couple of screws then I would go for a normal modelling and mirror approach. Trouble with curves WB there are so many different surfaces and very little documentation. Most of what I have discovered is by going through the actual source code of the project and hours of experimenting. I'm still digging for all the answers lol.
@@MangoJellySolutions Ok, sounds like I’ll need to delve into the source code myself. The parts can’t easily be 3d printed because they are for stove top use. PLA won’t cut it. I’m wanting wood for aesthetics and tactile. The lid handle was machined from Lignum Vitae. The handle will be harder to make, either a ply from veneers or with a metal insert. Still working on that!
@@dnmnsmith Another option is to take the model and make a mold from it. You can do it with your slicer software for the printer or create it in FreeCad. You could then mold the handle out of all kinds of resins and fillers that are more durable than PLA. You could also create a investment casting mold around the PLA print and using the lost wax method, the PLA can be burnt out and the cavity can be filled with a metal of your choice. Over kill but possible.
Thanks
This is some coincidence. I just spent a fair amount of time polishing an old coffee pot I rediscovered in a cupboard a week ago. It has the same type of handle and I was considering 3D printing a mold to make a resin replacement.
The distance between the upper and lower ends of the " Ↄ " is 63mm on mine.
The cross section is a simple rectangle with ~3mm radiused edges.
I was wondering if annealed PLA would do it.
@@gtalkthiago The glass transition temperature is way too low. The handle would soften and sag.
These Moka pots AKA stove top espresso pots are made of machined aluminium and get hot enough to boil water even where the handle is mounted.
The original handles are made of Bakelite - thermosetting plastic
I have a prototype machined from delrin that has been successful, but a bit…plasticy. I’m after something rewarding to touch. The real one will likely be from cross laminated hardwood, but todays machining attempt did not go well.