Can I skip roughing ?

This forum is for general discussion about Cut3D
Post Reply
DougE
Vectric Apprentice
Posts: 18
Joined: Thu Jan 01, 2015 7:01 pm
Model of CNC Machine: cnc Shark- -other

Can I skip roughing ?

Post by DougE »

If I am cutting foam material with a ball nose that has 1 inch of cutting length...

Can I avoid the roughing cut and just do finish cut ?

Would I change the plunge rate to be lower ?

Or would this simply mangle the piece ?

I will be cutting a total of 2 inches deep. Would I instead break the 2 inch slices into 1 inch slices and then run each file one after the other ?

**I apologize for a lot of newbie-ish questions. I'm just trying to NOT mess up my machine or get hurt.

I appreciate your time and help greatly

DougE

User avatar
IslaWW
Vectric Wizard
Posts: 1302
Joined: Wed Nov 21, 2007 11:42 pm
Model of CNC Machine: The Ultimate Woodworking Machine
Location: Marquette, MI, USA

Re: Can I skip roughing ?

Post by IslaWW »

doug...
One way or the other you will have to make sure that you do not force the bit to cut deeper than its CEL. I would suggest either a roughing pass or a taper bit with a long CEL
Gary Campbell
CNC Technology & Training
The Ultimate Woodworking Machine
GCnC411 (at) gmail.com

User avatar
Leo
Vectric Wizard
Posts: 3065
Joined: Sat Jul 14, 2007 3:02 am
Model of CNC Machine: 1300 x 1300 x 254 Chinese Made
Location: East Freetown, Ma.
Contact:

Re: Can I skip roughing ?

Post by Leo »

I cut HDU as deep as the flute length and I don't slow it down. Really it is dependent on your machine and what it is capable of. I don't know your machine.

I would not recommend trying to cut deeper than the flute length.

IF - the flute length is 2" - then try it at 2"

IF - the flute length is 1" - then try it at 1"
Imagine the Possibilities of a Creative mind

www.leosworkshop.com

DougE
Vectric Apprentice
Posts: 18
Joined: Thu Jan 01, 2015 7:01 pm
Model of CNC Machine: cnc Shark- -other

Re: Can I skip roughing ?

Post by DougE »

Does anyone know where I can come upon some 1/4" ball nose end mills with 2 inch flute length ?

**Yeah,.. I'm googled knee deep,.. but still looking.

Thank you Leo and Isla for your input.

DougE

User avatar
Rcnewcomb
Vectric Wizard
Posts: 3946
Joined: Fri Nov 04, 2005 5:54 am
Model of CNC Machine: GCnC/WinCNC
Location: San Jose, California, USA
Contact:

Re: Can I skip roughing ?

Post by Rcnewcomb »

Does anyone know where I can come upon some 1/4" ball nose end mills with 2 inch flute length ?
The closest I could find was 1.75" LOC on a 0.25" ballnose bits available through MSC: ->Link
Image

I've used bits from Gary Beckwith. He sells the BDP003 1/4” diameter straight ballnose with a 1-1/2” LOC on a 1/4” shank, 3” OAL: ->Link
Image
- Randall Newcomb
10 fingers in, 10 fingers out
another good day in the shop

User avatar
Leo
Vectric Wizard
Posts: 3065
Joined: Sat Jul 14, 2007 3:02 am
Model of CNC Machine: 1300 x 1300 x 254 Chinese Made
Location: East Freetown, Ma.
Contact:

Re: Can I skip roughing ?

Post by Leo »

Harvey Tool has a lot of specialty stuff like that.
Imagine the Possibilities of a Creative mind

www.leosworkshop.com

Bobtail Farm
Vectric Craftsman
Posts: 156
Joined: Mon Dec 01, 2014 3:53 pm
Model of CNC Machine: Homemade

Can I skip roughing ?

Post by Bobtail Farm »

Niagara and Kodiak

Post Reply