Profiles and Spirals with a 3/4" Barley Twist bit

Topics related to wrapped rotary machining in Aspire or VCarve Pro
Post Reply
User avatar
Rcnewcomb
Vectric Wizard
Posts: 3801
Joined: Fri Nov 04, 2005 5:54 am
Model of CNC Machine: GCnC/WinCNC
Location: San Jose, California, USA
Contact:

Profiles and Spirals with a 3/4" Barley Twist bit

Post by Rcnewcomb »

These are 13" 2x2 pine scraps that came off a packing crate. I used a Magnate 7558 3/4" Barley Twist bit.
15K RPM, 60 IPM, 0.1" pass depth

Depth of cut for these pieces ranged from 0.125" to 0.1875"

I did not use a rounding toolpath at all since the profile and spiral toolpaths overlapped each other.
The profile columns took about three and a half minutes. (0:03:30)
The spiral column took about five and a half minutes. (0:05:30)
Attachments
IMG_1336.jpg
IMG_1337.jpg
IMG_1342.jpg
- Randall Newcomb
10 fingers in, 10 fingers out
another good day in the shop

User avatar
Rcnewcomb
Vectric Wizard
Posts: 3801
Joined: Fri Nov 04, 2005 5:54 am
Model of CNC Machine: GCnC/WinCNC
Location: San Jose, California, USA
Contact:

Re: Profiles and Spirals with a 3/4" Barley Twist bit

Post by Rcnewcomb »

Here is a video of the spiral being carved: Spiral Barley Twist Column
- Randall Newcomb
10 fingers in, 10 fingers out
another good day in the shop

User avatar
dhellew2
Vectric Wizard
Posts: 1204
Joined: Thu May 22, 2008 10:14 pm
Model of CNC Machine: Legacy Artisan 72
Location: Royal City Washington

Re: Profiles and Spirals with a 3/4" Barley Twist bit

Post by dhellew2 »

More variations of the barley twist. Dale
IMG_3515.JPG
IMG_4105 cropped.jpg
You will get old if you live long enough!

Dale

User avatar
Rcnewcomb
Vectric Wizard
Posts: 3801
Joined: Fri Nov 04, 2005 5:54 am
Model of CNC Machine: GCnC/WinCNC
Location: San Jose, California, USA
Contact:

Re: Profiles and Spirals with a 3/4" Barley Twist bit

Post by Rcnewcomb »

used a 1" barley twist. around 10 minutes of machine time.
Attachments
IMG_1352.jpg
- Randall Newcomb
10 fingers in, 10 fingers out
another good day in the shop

User avatar
Mark's Wood Chips
Vectric Craftsman
Posts: 194
Joined: Thu Mar 19, 2015 12:36 pm
Model of CNC Machine: ShopSabre 23 with Rotary
Location: Hubertus, WI 53033
Contact:

Re: Profiles and Spirals with a 3/4" Barley Twist bit

Post by Mark's Wood Chips »

dhellew2 wrote:More variations of the barley twist. Dale
IMG_3515.JPG
IMG_4105 cropped.jpg
Both of you guy's barley twists are intriguing. I'm struggling with 4th axis work and I notice quite a bit or deflection near the center of the run on smaller diameter parts. Dale's walking sticks are beautiful and I would like to try to make something similar. Dale, could you post a photo of how you deal with deflection on long, narrow parts? Any other hints like tool bits and depth of cuts would be appreciated.

Mark

mark-s
Vectric Apprentice
Posts: 201
Joined: Sat Feb 03, 2018 2:03 am
Model of CNC Machine: diy 4 X 4 CNC Router
Location: So. Cal.

Re: Profiles and Spirals with a 3/4" Barley Twist bit

Post by mark-s »

Really like the walking sticks.
Nice work fellas.
mark-s

Post Reply