CAMheads CNC Router Forum By: CAMaster CNC

Go Back   CAMheads CNC Router Forum By: CAMaster CNC > Tips & Techniques > CAMaster Cabinetmaking

Reply
 
Thread Tools Display Modes
  #1  
Old 12-17-2014, 03:29 PM
dustboy dustboy is offline
Camaster Owner
 
Join Date: Aug 2013
Location: San Leandro, CA
Posts: 132
Default Tips for through-drilling melamine?

I've started cutting melamine closet parts for a local installer. When I through-drill my 5mm holes (for dividers, etc) I get some chip-out and even a little bulge on the back side.

I'm using a brand-new 5mm brad point bit from US Router Tools (with the 1/4" shank for the PC router). It runs at the minimum (~12,000) RPM at 60 vertical IPM. It cuts about .01" into the spoil board. A clean spoil board helps but we're still getting more chip than we want (i.e., more than none).
__________________
Near West Cabinets

Evan Andersen

Stinger III X3
15 HP FPZ Regen Vacuum
Reply With Quote
  #2  
Old 12-17-2014, 03:32 PM
james mcgrew's Avatar
james mcgrew james mcgrew is offline
Administrator, (MOD, KOTR)
 
Join Date: Sep 2008
Location: ridgeway sc
Posts: 6,508
Default

Why thru drill the shelf holes, is he using a single sheet or component construction,, we drill 5mm 12.5 deep (1/2")
__________________
James McGrew
CAMaster ATC 508
The principle of Measure twice cut once has not been replaced by a CNC

www.mcgrewwoodwork.com

https://www.facebook.com/pg/Mcgrew-W...=page_internal

Camera 1 ATC Closeup !
https://video.nest.com/live/esNTrZ
Reply With Quote
  #3  
Old 12-17-2014, 03:52 PM
dustboy dustboy is offline
Camaster Owner
 
Join Date: Aug 2013
Location: San Leandro, CA
Posts: 132
Default

These are closet verticals. On left and right verticals we half-drill, but center verticals have two sides. I don't want to get into 2-sided operations.
__________________
Near West Cabinets

Evan Andersen

Stinger III X3
15 HP FPZ Regen Vacuum
Reply With Quote
  #4  
Old 12-17-2014, 03:57 PM
james mcgrew's Avatar
james mcgrew james mcgrew is offline
Administrator, (MOD, KOTR)
 
Join Date: Sep 2008
Location: ridgeway sc
Posts: 6,508
Default

then you need a 5mm 2x2 compression bit. if there is such a thing
__________________
James McGrew
CAMaster ATC 508
The principle of Measure twice cut once has not been replaced by a CNC

www.mcgrewwoodwork.com

https://www.facebook.com/pg/Mcgrew-W...=page_internal

Camera 1 ATC Closeup !
https://video.nest.com/live/esNTrZ
Reply With Quote
  #5  
Old 12-17-2014, 07:26 PM
eandico eandico is offline
CAMaster Owner
 
Join Date: Jun 2010
Posts: 1,282
Default

I have gotten 5mm 2+2 compression tools from Centurion tools in the past.
They have a .25 shank.
I used them a lot with my old cnc because it wasn't ATC.
I could drill shelf pins cut dados and cut out cab boxes with no tool change.
__________________
Best,
Nick
www.theeandicompany.com
Reply With Quote
  #6  
Old 12-17-2014, 07:29 PM
machineitright machineitright is offline
Camaster Owner
 
Join Date: Mar 2014
Posts: 125
Default

dustboy,

Try reducing the feed rate by half for the last .060 of the depth and see if this helps.
__________________
Donnie Horton
machineitright@hotmail.com
Stinger II SR-44
Recoil ready
FTC, Laser Cross Hair, NEMA 34 900 oz motors
3 KW HSD spindle
Spindle speed control
VCP+Cut3D+PVC
Reply With Quote
  #7  
Old 12-18-2014, 12:11 PM
dustboy dustboy is offline
Camaster Owner
 
Join Date: Aug 2013
Location: San Leandro, CA
Posts: 132
Default

I think Donnie has it right, I was reluctant to reduce the feed because this bit has to drill thousands of holes in its lifetime. My first bit lasted a year and it was still going when I replaced it.

If the last little bit is slow it shouldn't heat up too much. Is there a way to do this in Vcarve without adding a second toolpath?
__________________
Near West Cabinets

Evan Andersen

Stinger III X3
15 HP FPZ Regen Vacuum
Reply With Quote
  #8  
Old 12-18-2014, 02:12 PM
Scott12 Scott12 is offline
CAMhead Friend
 
Join Date: Mar 2013
Posts: 19
Default

I do that all the time with a 5 mm V point bit. No blow out on the back side.
__________________
Scott Williams
Cabinet Solutions
CAMaster Cobra 510 ATC
State College, PA
Reply With Quote
  #9  
Old 12-18-2014, 04:58 PM
dustboy dustboy is offline
Camaster Owner
 
Join Date: Aug 2013
Location: San Leandro, CA
Posts: 132
Default

Quote:
Originally Posted by Scott12 View Post
I do that all the time with a 5 mm V point bit. No blow out on the back side.
Have you found one that will fit a Porter Cable collet?
__________________
Near West Cabinets

Evan Andersen

Stinger III X3
15 HP FPZ Regen Vacuum
Reply With Quote
  #10  
Old 12-19-2014, 05:03 PM
Scott12 Scott12 is offline
CAMhead Friend
 
Join Date: Mar 2013
Posts: 19
Default

Haven't really looked as mine goes in my spindle.
__________________
Scott Williams
Cabinet Solutions
CAMaster Cobra 510 ATC
State College, PA
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 02:33 PM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.