LumberJocks

Carving Green Lumber

  • Advertise with us

« back to Woodworking Skill Share forum

Forum topic by tyskkvinna posted 659 days ago 719 views 0 times favorited 9 replies Add to Favorites Watch
View tyskkvinna's profile

tyskkvinna

1295 posts in 1487 days


659 days ago

I am doing some CNC carvings on green lumber. It was a living tree less than two months ago.

I am not concerned about cracking or checking or any of that—for what I’m doing, any of this will simply be “features”.

What I AM wondering is about the tooling, feeds and speeds. Any of you that use a CNC ever run green lumber through? Any tips? I was burning the wood a little.

If you run a regular router on green wood is there any suggestions there I can use? It’s kind of new territory for me.

I am going straight from log to carving, so drying it is kind of out of the question :) (Not going to wait several years to carve them)

-- Lis - Michigan - http://www.missmooseart.com - https://www.etsy.com/people/lisbokt


9 replies so far

View SASmith               's profile (online now)

SASmith

1489 posts in 1488 days


#1 posted 659 days ago

What kind of wood is it you are trying to carve?
Is the bit still sharp?
Are you using a variable speed router?

-- Scott Smith, Southern Illinois

View tyskkvinna's profile

tyskkvinna

1295 posts in 1487 days


#2 posted 659 days ago

Mulberry and Ash. (Not at the same time obviously)

The bit is super sharp. I’m using insert tooling and change it out as necessary.

The router can do anything from 2k to 24k. I usually cut around 20k.

-- Lis - Michigan - http://www.missmooseart.com - https://www.etsy.com/people/lisbokt

View KenBry's profile

KenBry

449 posts in 948 days


#3 posted 659 days ago

Drying doesn’t have to take years, Depending on the log a lumber yard might be able to dry it in a kiln.

-- Ken, USAF MSgt, Ret.

View SASmith               's profile (online now)

SASmith

1489 posts in 1488 days


#4 posted 659 days ago

Wish I could be of more help.
My only suggestion would be to vary the RPMs to see if that helps prevent burning.

Hopefully someone else will chime in with a solution to your problem.

-- Scott Smith, Southern Illinois

View DS's profile

DS

2079 posts in 922 days


#5 posted 659 days ago

Burning means the chip load is too low.
To increase the chip load, either reduce the RPMs on the spindle, or, increase the feed rate IPMs.
If you have a load meter on the spindle, you could tell if the feed rate is maxed out already. Too fast and you risk breaking the bit.
I’d try a lower rpm on the spindle first.

-- "Hard work is not defined by the difficulty of the task as much as a person's desire to perform it.", DS251

View DS's profile

DS

2079 posts in 922 days


#6 posted 659 days ago

The “Goldilocks” procedure:

In a production situation it is important to test cutter performance in real world circumstances.
I will buy 3 new bits whenever a new material is being cut or a new tool is being tried. I fully expect to ruin 2 of the bits. This allows me to bracket the cutter for optimum performance for long-term production.

Too slow burns up the bit
Too fast fractures the bit.
In the middle is JUST RIGHT.

Before this procedure, my operator would never thought of running 1100 ipm for his outline cuts, but, with the proper high speed tooling, this is totally acheivable. It took the Goldilocks test to prove it. Now, production on the CNC is almost twice what it used to be.

-- "Hard work is not defined by the difficulty of the task as much as a person's desire to perform it.", DS251

View tyskkvinna's profile

tyskkvinna

1295 posts in 1487 days


#7 posted 658 days ago

Out of curiosity, what kind of parameters do you run with 1100 ipm? I sometimes run at 1000ipm on acrylic.

-- Lis - Michigan - http://www.missmooseart.com - https://www.etsy.com/people/lisbokt

View DS's profile

DS

2079 posts in 922 days


#8 posted 654 days ago

1100 ipm is high speed tooling. We were cutting 1/2” PBC Melamine. It was a 3/8” diameter three flute down spiral chipbreaker/finisher at 20k rpm. Most standard tooling runs 400 to 600 ipm.

-- "Hard work is not defined by the difficulty of the task as much as a person's desire to perform it.", DS251

View Jim Jakosh's profile

Jim Jakosh

10248 posts in 1607 days


#9 posted 653 days ago

Hi Lis. sorry I can’t help you there but DS251 seems to have the know how on the CNC. ..........Jim

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!!

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com

Latest Projects | Latest Blog Entries | Latest Forum Topics

GardenTenders.com :: gardening showcase