CNC router question

[the_digital_dentist]

Can the CNC router cut corrugated cardboard?  What sort of bit would be best for that?

[Pete Prodoehl]

A drag knife might work.


Pete

On 1/11/18 8:50 AM, the_digital_dentist wrote:
> Can the CNC router cut corrugated cardboard?  What sort of bit would
> be best for that?

> --

[rocky53204 .]

Can't think of any reason why you can't do that.

Too big to laser cut?

Steel or carbide router bit could be used with equal results.

Clamping might be an issue. Might have to sandwich cardboard between plywood sheets.

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[Eric Berna]

How about adding a laser to the CNC Router? Something like this?

https://www.banggood.com/450nm-3500mW-3_5W-Blue-Laser-Module-With-TTL-Modulation-for-DIY-Laser-Cutter-Engraver-p-1103261.html?rmmds=search&cur_warehouse=CN

I know why not, I’m just kidding.

Eric

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[rocky53204 .]

CNC/laser, it's been done may not be suitable for cutting cardboard.

http://www.rockler.com/laser-engraving-module-for-cnc-piranha-fx

Eric

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[Steve Pilon]

Give it a try with a bit. Whats the worst that can happen?

[Brent Bublitz]

"Whats the worst that can happen?"

A massive fire? A rotating bit might not be the best. I would do a drag knife. 

On Thu, Jan 11, 2018 at 11:24 AM, Steve Pilon <spi...@gmail.com> wrote:

Give it a try with a bit. Whats the worst that can happen?

--

[Steve Pilon]

Well I mean stay and watch it close. 

[felisha]

A drag knife with a vacuum table is ideal. http://donektools.com/ has one that uses standard utility knife blades and mounts in a router collet. You just have to make sure not to power the router or spindle motor. Also some experimentation with the trailing cut and how you can make corners with it is needed. A few different CAM solutions support drag knifes. Some of the Vectric product support drag knife path generation as well. 

[Pete Prodoehl]

There are some DIY versions as well:
https://www.thingiverse.com/search?q=drag+knife


Pete

[the_digital_dentist]

I've almost concluded that instead of cutting individual sheets and gluing them together, it may be better to glue first and cut a thick stack using a jig saw tethered to the center of the stack with an appropriate length of cable/chain.  That way I could cut maybe 1-2" thickness at one go.

Now, where do I get corrugated board, approximately 4' x 4', enough to stack up to about 8" thick?  I can use smaller pieces and glue them together, so I could use scrap boxes, but it would be nice if there were a cheap source of larger stuff - maybe mattress or appliance boxes.  It doesn't matter if the material has been folded.  Maybe I should be dumpster diving at furniture stores?

[Felisha Wild]

Furniture stores or recycling centers would be good sources I would think for bigger sheets.

Virus-free. www.avg.com

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Our Daily Salt, LLC
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On Fri, Jan 12, 2018 at 4:31 PM, the_digital_dentist <mark.r...@gmail.com> wrote:

I've almost concluded that instead of cutting individual sheets and gluing them together, it may be better to glue first and cut a thick stack using a jig saw tethered to the center of the stack with an appropriate length of cable/chain.  That way I could cut maybe 1-2" thickness at one go.

Now, where do I get corrugated board, approximately 4' x 4', enough to stack up to about 8" thick?  I can use smaller pieces and glue them together, so I could use scrap boxes, but it would be nice if there were a cheap source of larger stuff - maybe mattress or appliance boxes.  It doesn't matter if the material has been folded.  Maybe I should be dumpster diving at furniture stores?

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[felisha]

Actually we could glue it all together and spin it like a lathe horizontally. No danger in that right? :D

[Felisha Wild]

What about cutting it in one shot with a bandsaw and a circle cutting jig. 

On Jan 12, 2018 5:04 PM, "felisha" <fel...@ourdailysalt.com> wrote:

Actually we could glue it all together and spin it like a lathe horizontally. No danger in that right? :D

--

[Mathew Melk (BOD At-Large)]

Hey Mark, Maker Faire Milwaukee has a good working relationship with Ritzman Appliance In Hales Corners has set aside cardboard from refrigerator, washer, or dryer boxes for usage at Maker Faire Milwaukee in the past. They install appliances regularly but they can't hold onto the cardboard for very long so it will need to be picked up weekly or twice a week. If you would like I can reach out to them on your behalf and see if they are interested in setting some aside for your project. Seeing as you are on recovery for the next couple weeks I won't tell them to start saving any yet.

Mat

[Bryan MacKenzie]

I work for a packaging company and we have a sample making table.  We chew through a lot of cardboard and recycle it.  I'm happy to bring in a stack of strap if anyone has a need for it.

Bryan

[the_digital_dentist]

Thanks for all the replies.  I think I'm going to have to put this project on the back burner until I'm a little more mobile again, in a couple weeks.  I suspect that gathering big boxes from the appliance store is going to be the way to go.