How can I control warp?

[jlholu]

I recently made a travel case for a client which had two 3D graphics that were raised .500" and three logos and title engraved in the new surface.

The starting material was made from solid cherry which measured 14" x 10" x 1.500". The next day after all the routering was complete, the lid worped approximately.060-.090.

How can I control the worping when removing so much material from one side?

[steve_g]

Jim…
I’m not answering from experience, just thinking out loud!
Taking that much off one side is going to cause warping… perhaps the two large raised objects could have been applied to thinner stock… Or build up The stock with cross laminated cherry.
I suspect it would be too expensive to have the raw wood high pressure chemically stabilized…
SG

[Brady Watson]

Jim,
The way I would do it is eliminate removing all that material to begin with. Just cut the 3D relief portions out individually as appliques and glue them on. The slight variation in grain between them will actually make the elements pop out more. You can even use different woods to add a bit of contrast.

-B

[Brady Watson]

Jim,
The way I would do it is eliminate removing all that material to begin with. Just cut the 3D relief portions out individually as appliques and glue them on. The slight variation in grain between them will actually make the elements pop out more. You can even use different woods to add a bit of contrast.

-B

[Brady Watson]

Jim,
The way I would do it is eliminate removing all that material to begin with. Just cut the 3D relief portions out individually as appliques and glue them on. The slight variation in grain between them will actually make the elements pop out more. You can even use different woods to add a bit of contrast.

-B

[Brady Watson]

Jim,
The way I would do it is eliminate removing all that material to begin with. Just cut the 3D relief portions out individually as appliques and glue them on. The slight variation in grain between them will actually make the elements pop out more. You can even use different woods to add a bit of contrast.

-B

[Brady Watson]

Jim,
The way I would do it is eliminate removing all that material to begin with. Just cut the 3D relief portions out individually as appliques and glue them on. The slight variation in grain between them will actually make the elements pop out more. You can even use different woods to add a bit of contrast.

-B

[bleeth]

Hey Brady-I think your server has the hiccups!!

Jim-I'm with Brady on this. Two carvings should have been appliques.

[scottp55]

Boy, That Brady guy repeats himself a lot :) :)

[Kyle Stapleton]

You could also try pocketing out the back side by 1/2" to try to keep things even.

[Brady Watson]

Holy Stromboli Batman!!!

I guess Nancy was fooling with the server last night because it wouldn't take my reply or gave lip about waiting for flood control etc.

I thought for sure I'd wake up to a totally new and modern forum software...

-B

[jlholu]

Thanks Scott, Brady and Kyle for your comments! I didnt think about the laminating or separate 3D cutouts. I'll have to try both in couple of my upcoming projects. I did consider removing the same amount of stock on both sides to equalize the stress but didn't want to waiste that much material.

[cowboy1296]

Thats the million dollar question. One thing that helps and its still no cure all. I get my planks from a furniture maker. he buys boards that are about 10 foot long. He then rips them into strips between 3-4 inches wide. then mismatching the grain he glues them back together, creating planks that are 60 inches long and 18 inches wide, by 1.7 inches thick. But they still warp after i cut the 3-d file but not as much. I have done everything except cutting a pocket on the back. Those that have done this does the pocket work.

[Davo]

those valves are awesome!

how did you create those?

[jlholu]

Davo - I work for Fisher Controls who manufactures both valves. I was able to get the stl files from the Engineering Dept and had one of my coworkers modify for the final shell graphic. I was able in import that into Aspire for my cut files.