How to CNC a Bowl - Two Sided CNC Machining - "The Shallow Flow Bowl" - Fusion 360 File Available!

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Hey guys! I came up with a new way to do two sided machining on my CNC machine. If you have a CNC router, and you want to machine out both sides, then you have to have some method for aligning the second operation (the bottom side). Check out this video for how I make this "Shallow Flow Bowl". This one concentrates on using Fusion 360 for the toolpaths (the CAM). You can make it too! / corbincncwoodworking - Corbin's CNC Woodworking Group on Facebook!
Update: I now have a more "traditional" two sided machining way of doing this project in Vectric VCarve / Aspire: • How To CNC a Bowl in V...
I wrote up a complete set of directions (PDF) along with the Fusion 360 file all setup with my particular machine's toolpaths, which should work well for most CNC router machines. Get it at:
Corbin's Workshop Fusion 360 Version: www.corbinsworkshop.com/shop/...
Corbin's Workshop VCarve Version: www.corbinsworkshop.com/shop/...
Etsy Fusion 360 Version: www.etsy.com/CorbinsWorkshopS...
Esty Vectric VCarve Version: www.etsy.com/CorbinsWorkshopS...
The file requires some basic Fusion 360 knowledge, but I do cover a lot of the details on how to use it in the plans/directions. I will release a Vectric VCarve version in the future! I'll also talk about VCarve makes things like this difficult.
3D printable hold downs:
www.corbinsworkshop.com/shop/...
*or*
www.etsy.com/CorbinsWorkshopS...
Bits/Materials:
* 3/8 bit: amzn.to/43CNTNP
* 1/4" spiral up cut - from 2L
www.2linc.com/product/square-...
Part # PWE2-250-1C1.25
and Part # PWB2-250-1C1.125
* Finish: amzn.to/3X5hTPY
* Tape: amzn.to/3qMTEtL
I'll have a few bowls available for sale on www.corbinsworkshop.com
Typically two sided machining is done with some dowels for alignment...and this method works great for projects that you can cut through with a single bit. For woodworking, with typical bits, that is about 1-1/4", or up to about 2.5", if your design allows cutting exactly half of each side. For complex shapes, like a bowl, you are limited to your cutter height, unless you do some clever stepping out to avoid collisions. This makes it more difficult to leave space for alignment holes.
Machine: Avid CNC Pro 4'x8' with an ATC / Automatic Tool Changer
Thanks everyone!
Corbin Dunn
www.corbinstreehouse.com // blog
www.corbinsworkshop.com // Products, CNC files (many are free)
** Some links are affiliate links...but I use these products myself! **
Timestamps:
0:00 Intro
0:32 The Idea
1:13 Bottom Setup
2:51 Bottom Machining
3:23 Making the Jig
4:19 Jig Setup / Use
5:25 Machining the Top
6:11 Finishing Up
6:52 Finished Shots
Music: Simon More - Tropical Love
Use via CC by attribution
#cncwoodworking #cnc #woodworking

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Опубликовано:

28 июн 2024

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Комментарии : 33

@maestro8008 Год назад

This is the best bowling video I've ever seen!

@CorbinDunn Год назад

Haha!

@woodworkingandautomation 10 месяцев назад

Dowel pins rock! Excellent idea!

@shughes599 Год назад

I love the workflow!

@CorbinDunn Год назад

Thanks!

@michaellitzkow8123 3 месяца назад

Very nice product. Your careful thinking on procedure really paid off.

@CorbinDunn 3 месяца назад

Thanks!

@cncwoodcrafofficial Год назад

Great job

@johnagorman 5 месяцев назад

That's crazy!! So beautiful Thank you

@CorbinDunn 4 месяца назад

Thank you too!

@ukie5130 8 месяцев назад

Super nice work.

@CorbinDunn 8 месяцев назад

Thanks!

@edmelzark1069 6 месяцев назад

Beautiful job

@CorbinDunn 6 месяцев назад

Thanks Ed!

@wittworks Год назад

Fantastic thumbnail ❤

@CorbinDunn Год назад

Photoshop is making stuff easy these days!

@jothammcmillan8854 Год назад

Great video with some tips that I will likely use in the future. My one suggestion is that there is some value in using wooden dowels in that if you're CAM operation is somehow screwed up (not that I ever make that mistake... ), then if the bit collides with the dowel, it will survive a wood dowel as opposed to likely chipping on a steel dowel. I love the 3d printed clamps that I use for exactly that reason.

@CorbinDunn Год назад

Thanks! Yes, that is a good point about the wood dowels. I usually use them the first time I do a new project/design, and then I move to steel dowels when I reproduce it again.

@workermancycles Год назад

such a great idea! Do you find any warp-age of the bowls after removing so much material? Or is it not much of an issue? It looks like all of the bowls are at least tow pieces of wood glued together...so I assume that helps quite a bit. Great job man!

@CorbinDunn Год назад

So far I haven't had any warping issues. I've had some done at least a month or so, but the humidity is fairly stable where I'm at in the US. The multi-piece ones will definitely maintain the shape better! I've sometimes layered them with the grain at 90 degrees to help with any expansion/contraction, but it doesn't seem to make a difference, so I go with aesthetics.

@joshpit2003 Год назад

Nicely done dude. What is your tolerance/slop for the bowl and jig fit? 0.005 surface offset? Too tight and I imagine you can't compress into the tape too much. Too loose, and I imagine a twisting force could break the minimal tape surface bond. Makes me think allowed slop is directly proportional to tape thickness (ie: how much torsional force the tape can handle).

@joshpit2003 Год назад

Also: Have you ever played with using one of those razor-jaw vices in this application? The ones that grab onto a very small amount of stock. I'm not sure if they will work on wood, or how easy the marring would be to remove with sand-paper after, but it seems like it could work.

@CorbinDunn Год назад

Yeah! That took some time to figure out. I move the jig, in the model, about 0.045" up before I do the boolean cutout of the bowl on it. This gives it a gap underneath. I think this was too much...as I used some blue tape under the jig to give it a little less space., so about .030" might be ideal. I had problems with my first tests where the bowl would easily pop off. I found some pretty thin double sided tape; the thicker tape lets the workpiece move and have too much play.

@CorbinDunn Год назад

I haven't tried those! It is hard to avoid denting the woods -- especially redwood...it dents so easily.

@joshpit2003 Год назад

@@CorbinDunn Interesting. That's a much larger offset than I would have guessed. As for the razor-jaws: I'd definitely expect the knife edge of the jaws to bite into the wood (it bites into the metal) and leave a mark, but it takes such a small bite that you might be able to easily account for it and then file it off after. I'm just not sure if you could get the required hold-down strength from it, but I'm also surprised and impressed that such a thin double-sided tape works. So maybe.

@paulschreiber Год назад

These look great! Want to sell me any?

@CorbinDunn Год назад

I've got about 5 I've posted on corbinsworkshop.com; currently I'm selling them for $50/bowl. I did a small run of them, but I need to figure out my real time and material costs to get a better feel for what I should price them at.

@drevjuk Год назад

Wery difficult way

@CorbinDunn Год назад

What way do you suggest?

@mebmakes Год назад

Sorry, Mey-la-mine? That's a new pronounciation to me!

@CorbinDunn Год назад

Haha! I know...I can never remember how people pronounce that word. I've called it May-lah-meen, and may-lah-mine, both of which are not right. Maybe one day I'll learn it :)