CNC Foam Insert Experiment

Рет қаралды 148,226

5 жыл бұрын

I wanted to try to create custom cut foam inserts for shipping products so I picked up some closed cell and EVA foams for some tests. The closed cell foam (black) is a seat cushion and the EVA foam (gray) is an exercise mat.
I experimented with a compression bit, downward spiral, up spiral bit and engraving bit. Probably not a surprise that the compression and downward spiral bits performed the best. In the EVA foam the cut quality was amazing and the engraving samples also came out super crisp. In the closed cell foam, hard to tell in the video, the climb cut was actually really nice but the pockets were pretty bad. I think the key is going to be smaller step overs and slower feeds.
Links to the tools I used.
Downspiral Carbide Straight Bit 1/4" D - amzn.to/2GivXyO
Amana Tool 46350-K Compression Spiral 1/4" D - amzn.to/2IsHHC9
SGS 30446 3 2 Flute Square End Mill 1/4" D - amzn.to/2Uq3cVY
Amana Tool RCK-361 Solid Carbide Insert 30 Deg x 0.010 - amzn.to/2UoA29t
Amana Tool RC-1075 CNC In-Groove Insert Engraving Tool Body 1/4 Inch SHK x 2-1/2 Inch Long - amzn.to/2Dh2mF8
DEWALT DWP611 1.25 HP Max Torque Variable Speed Compact Router with Dual LEDs - amzn.to/2Dkoyyh

Пікірлер: 26

@JoshuaMcQueen 3 жыл бұрын

Thank you so much for making this video. Saved me a lot of time and effort having to do these experiments myself.

@giddybots 6 ай бұрын

That you for this. I make tires for my combat robots from eva foam, been using my cricut to cut them from 2mm sheets and gluing them together to get the desired width. I have a bunch of those foam floor mats and am about finished building a mpcnc so cutting my tires from that will be my first project. I have no clue how to choose bits so this gets me on the right track for these projects. Gluing the layers resulted in out of round, uneven tires that needed a lot of truing on my homemade tire truer. Hoping the cnc'd ones will need only a quick truing before applying traction compound. Will also go from 15-20 minutes a tire to 5ish, which really adds up on a 4WD that needs at least 3 sets of spares on hand at fights. Maybe my second cnc project will be foam chassis inserts for shock absorption around the electronics. I know a billet HDPE chassis is also on my list.

@JesseSchoch 3 жыл бұрын

conventional works much better than climb on foam from my testing.

@mikekiske 4 жыл бұрын

You just saved my day! Thank you.

@blackdogsdesignco5037 4 жыл бұрын

Cool!

@j.pearson3740 5 жыл бұрын

Try undercut milling for the finish cut instead of climb milling. I pocket clear by climb milling so that the foam doesn't peel off in a long strand, and get picked up by the cutter. I then do a finish cut (0.2mm) by undercut milling, and this leaves a neat edge.

@blackdogsdesignco5037 5 жыл бұрын

Thanks, I’ll try that!

@robevans8555 4 жыл бұрын

Yes I fine this to work great also

@bobj49f2 8 ай бұрын

How did you fasten the material to the spoil board? I'm trying to router a 1/4" rubber mat and am having trouble keeping stuck to the spoil board. I need to be able to remove it once I'm done.

@VacFink 2 жыл бұрын

You might get better results with a slower spindle speed and fast feed rate. The feeds and speeds for most foam cutting bits have a slow spindle speed.

@benbencom 5 жыл бұрын

EVA foam actually laser cuts very well

@blackdogsdesignco5037 5 жыл бұрын

I would love to get one at some point

@rockwalldesign 4 жыл бұрын

laser that thing

@rockwalldesign 4 жыл бұрын

Check my video with EVA tiles

@blackdogsdesignco5037 4 жыл бұрын

Will do

@caros4279 3 жыл бұрын

What kind of end mill did you use for the lettering?

@blackdogsdesignco5037 3 жыл бұрын

Amana Tool RCK-361 Solid Carbide Insert 30 Deg x 0.010 - amzn.to/2UoA29t Amana Tool RC-1075 CNC In-Groove Insert Engraving Tool Body 1/4 Inch SHK x 2-1/2 Inch Long - amzn.to/2Dh2mF8

@MrNotebookguy 3 жыл бұрын

Well I was thinking the same thing but as I saw from your video the result is horrible :) Thanks for sharing

@OlegVScherbakov 5 жыл бұрын

Hello! And what kind of machine do you use?

@blackdogsdesignco5037 5 жыл бұрын

This is the 18” x 24” Solsylva built from a set of plans.

@uzkanda 5 жыл бұрын

Polished endmills, try, will make a world of difference.

@MonkeyMaster1707 4 жыл бұрын

Does it matter what bit you use?

@MonkeyMaster1707 4 жыл бұрын

Also is the first one high density or low density, and how thick is it?

@blackdogsdesignco5037 4 жыл бұрын

Yeah, I would recommend a down cutting or compression bit. Made a huge difference in wall quality compared to an up cut.

@MonkeyMaster1707 4 жыл бұрын

Thank you!

@blackdogsdesignco5037 4 жыл бұрын

It’s 3/4” thick and fairly dense. I think as long as you test your speeds and feeds you won’t have any problems either way. Down cutting seems to make the biggest difference.