Better material

This section is for useful tips and tricks for Aspire

Better material

Postby hdtheater » Wed Oct 07, 2015 2:23 am

I have been carving a sign out 3/4" MEDEX as regular grades of MDF tend to crumble with fine details. However, the details on this sign are too fine for MEDEX. Hoping someone might recommend a material that won't crumble with fine details.

Image

You can see the edges of the letters crumble off. My only other choice is to make the pocket tool path shallower, but I am at 1/16" depth now.

Thanks,

-Eric
Thanks,

-Eric
hdtheater
Vectric Craftsman
 
Posts: 183
Joined: Tue Apr 27, 2010 11:00 pm
Location: DFW Texas
Model of CNC Machine: CNC RouterParts Pro 48x96

Re: Better material

Postby Leo » Wed Oct 07, 2015 2:27 am

HDU is a better material.
Imagine the Possibilities of a Creative mind

www.leosworkshop.com
User avatar
Leo
Vectric Wizard
 
Posts: 2950
Joined: Sat Jul 14, 2007 3:02 am
Location: East Freetown, Ma.
Model of CNC Machine: 1300 x 1300 x 254

Re: Better material

Postby hdtheater » Wed Oct 07, 2015 2:42 am

Thanks Leo. That is on my list. My only concern is that it is a composite material that could come apart like MEDEX. Wondering if there is a solid material that could work. I thought I might have to make a mold out of resin after a good carve.
Thanks,

-Eric
hdtheater
Vectric Craftsman
 
Posts: 183
Joined: Tue Apr 27, 2010 11:00 pm
Location: DFW Texas
Model of CNC Machine: CNC RouterParts Pro 48x96

Re: Better material

Postby kzeyus » Wed Oct 07, 2015 4:30 am

HDU, PVC (not expanded PVC), Corian, Nyloboard
Ken Zey
Rogers, AR
http://www.CedarSlabSigns.com
http://www.lookoutmercantile.com
Shopbot PRS Alpha 72x144
kzeyus
Vectric Wizard
 
Posts: 343
Joined: Wed Sep 27, 2006 4:05 pm
Location: Rogers, AR

Re: Better material

Postby hdtheater » Wed Oct 07, 2015 7:21 pm

I have some Corian. Did not think about that.

What kind of feeds and speeds does Corian require?
Thanks,

-Eric
hdtheater
Vectric Craftsman
 
Posts: 183
Joined: Tue Apr 27, 2010 11:00 pm
Location: DFW Texas
Model of CNC Machine: CNC RouterParts Pro 48x96

Re: Better material

Postby Leo » Thu Oct 08, 2015 2:33 am

hdtheater wrote:Thanks Leo. That is on my list. My only concern is that it is a composite material that could come apart like MEDEX. Wondering if there is a solid material that could work. I thought I might have to make a mold out of resin after a good carve.


Medex is a material like HDU, but enhanced a little for moisture control. It is not an exterior material like Extira is. It is wood (paper) fiber bonded with a bonding agent. It is not particularly stable or strong especially with small detail.

HDU - is a plastic foam and is a molded product. Unlike Medex or MDF or Extira - it is a single solid (as solid as foam can be) product. It is not a composite of a few different materials like Medex is.

The HDU will hold better detail than Medex.

Corian is a LOT denser and harder than HDU - but still a plastic material. Corian cuts very nicely and can take some very intricate detail. It IS brittle and can break easily. You can sand it file it and paint it.

Another nice material is PVC. You can buy it in sheets or at the big box stores like Lowes or Home Depot. It is the PVC trim boards. PVC is a little tough to paint after the surface skin has been cut away, but with a good several coats of Primer - it will paint nicely. PVC is a plastic - harder and denser than HDU, but softer and looser than Corian.
Imagine the Possibilities of a Creative mind

www.leosworkshop.com
User avatar
Leo
Vectric Wizard
 
Posts: 2950
Joined: Sat Jul 14, 2007 3:02 am
Location: East Freetown, Ma.
Model of CNC Machine: 1300 x 1300 x 254

Re: Better material

Postby hdtheater » Thu Oct 08, 2015 3:40 am

Thanks again. I appreciate the detail on the materials.

I borrowed some HDU scrap from a friend and have some Corian to attempt to resolve my issues.

I need to find a local supplier of sheets of PVC too just in case.

Finished this sign is about 20" in diameter.
Thanks,

-Eric
hdtheater
Vectric Craftsman
 
Posts: 183
Joined: Tue Apr 27, 2010 11:00 pm
Location: DFW Texas
Model of CNC Machine: CNC RouterParts Pro 48x96

Re: Better material

Postby dealguy11 » Thu Oct 08, 2015 3:43 pm

HDU is intended for carved signs. It comes in different densities - 15 lbs and 20 lbs are typical. Both take a lot of detail and are intended for outside applications. They also paint very nicely. 20 lb. is stiffer (and heavier, if that matters) than 15 lb. but either should take the detail required for this sign.
Steve Godding
D&S Artistic Woodworking http://www.dsartisticwood.com
User avatar
dealguy11
Vectric Wizard
 
Posts: 1438
Joined: Tue Sep 22, 2009 9:52 pm
Location: Henryville, PA
Model of CNC Machine: Anderson Selexx 510

Re: Better material

Postby Peter Stenabaugh » Wed Jan 27, 2016 9:23 pm

Another thought for material like MDF (I am not familiar with HDU - we dont see that in Canada under that name. However for mdf one solution you can try is to get some 'wood hardener'. Such a product is available from Min Wax. this is actually designed to be used on semi rotten, or soft corky type of woods. It is some type of plastic product, but it has the ability to soak into the wood and when it cures you have a very hard durable surface that should be good for routing where you need strength and rigidity.

I dont know if this is suitable for exterior applications or not but checking on the MinWax website may reveal more information. I have some of this stuff although I have never used it yet, so I am not speaking from experience, but this is exactly the type of application this product is designed for.

Another product that might work is a substance like 'Cactus Juice' or similar products that people are using for infusing soft wood for turning pens etc. This stuff as well as the Minwax product are basically 'wood stabilizers' and the liquid is a very water thin material that soaks into the wood and then needs to be cured. MinWax, I believe cures on its own, but the Cactus Juice or similar products need to be baked in a low temperature oven, so that may not work for large projects.

Here is a link to a product similar to Min Wax - http://www.colonialmedical.com/rotted-w ... -2615.html - This material appears to be suitable for outdoor use.
Minwax link: http://www.minwax.com/wood-products/mai ... d-hardener This also appears to be outdoor safe.

Pete
Peter Stenabaugh
Vectric Craftsman
 
Posts: 189
Joined: Wed Jun 07, 2006 7:26 pm
Location: Calgary, Alberta Canada

Re: Better material

Postby Leo » Thu Jan 28, 2016 12:29 am

I know a few people in Canada that use HDU.

HDU is not a brand name, it is a material. High Density Urethane.

There are several brands. DunaFoam, CoraFoam, SignFoam, Precisionboard (Coastal Enterprises) to name a few.

Some are more expensive than others.

Density weights are not the same from one supplier to another.

Look at sign supply places for a source.
Imagine the Possibilities of a Creative mind

www.leosworkshop.com
User avatar
Leo
Vectric Wizard
 
Posts: 2950
Joined: Sat Jul 14, 2007 3:02 am
Location: East Freetown, Ma.
Model of CNC Machine: 1300 x 1300 x 254

Re: Better material

Postby Peter Stenabaugh » Thu Jan 28, 2016 12:52 am

ok, great Leo, thanks for the heads up.

Pete
Peter Stenabaugh
Vectric Craftsman
 
Posts: 189
Joined: Wed Jun 07, 2006 7:26 pm
Location: Calgary, Alberta Canada

Re: Better material

Postby James M » Thu Jan 28, 2016 1:50 am

I haven't seen the PVC material at the big box stores up here in Calgary, Alberta Canada either.

James
James M
 
Posts: 33
Joined: Sun Apr 26, 2015 9:06 pm
Location: Calgary, Alberta
Model of CNC Machine: TBA


Return to Aspire - Tips and Tricks

Who is online

Users browsing this forum: No registered users and 7 guests