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Author Topic: What do I need for drilling with DWC?  (Read 3716 times)

Butch Elrod

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What do I need for drilling with DWC?
« on: April 25, 2013, 07:48:43 AM »
I've been asked about drilling holes for a cribbage board.  What do I need?  A self centering drill bit?  Will this require a new or special collet?
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Tom S

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Re: What do I need for drilling with DWC?
« Reply #1 on: April 26, 2013, 04:18:53 AM »
what size are the holes?

Butch Elrod

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Re: What do I need for drilling with DWC?
« Reply #2 on: April 26, 2013, 10:48:45 AM »
what size are the holes?

1/8" for commercially available pegs.
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Tom S

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Re: What do I need for drilling with DWC?
« Reply #3 on: April 27, 2013, 03:38:28 AM »
you should be ok just to drill with it. no need to use a center drill.

Butch Elrod

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Re: What do I need for drilling with DWC?
« Reply #4 on: April 27, 2013, 08:00:21 AM »
That's the impression I'm getting from reading elsewhere.  Apparently a lot of cribbage boards are made using a commercially purchased template.  Of those made with CNC, I've found some say they use a spiral flute router bit and an other said 'end mill'.

On a related note, I have downloaded a dxf layout of the holes.  Every hole is drawn as a circle  When I import the dxf into CNC-USB and run a Simulation, it traces the outline of every hole :( {image below}

Am I going to have to change these 150+ circles into dots to get the drilling done correctly?
~~~~~
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Tom S

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Re: What do I need for drilling with DWC?
« Reply #5 on: April 27, 2013, 08:49:45 AM »
yea that is what has to be done.

Tom S

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Re: What do I need for drilling with DWC?
« Reply #6 on: April 27, 2013, 08:56:21 AM »
with bobcad we have a function in the arcs that puts a point in the center of the circle when the circle is highlited. very quick. then you just delete the circle and it leaves the point.

Butch Elrod

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The holes are a little large...
« Reply #7 on: May 03, 2013, 06:43:42 PM »
I managed to get 'points' inside my circles using LibreCAD.  I took that into CorelDraw and combined it with the rest of my design before generating Gcode.  Apparently the 'point' grew a little in Corel...  Every hole was routered out to 0.160" rather that 0.125"

I don't have pegs to test the fit and see how sloppy that is.

 This one has a WSU Cougars logo at the end.
~~~~~
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Butch Elrod

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Adapter bushings
« Reply #8 on: May 13, 2013, 07:17:13 AM »
After drilling several cribbage boards, I started looking into a solid way of holding 1/8" drill bits in the collet. I found these steel adapter bushings from MLCS.  Mine have been ordered but I don't have them yet.

http://www.mlcswoodworking.com/shopsite_sc/store/html/smarthtml/pages/bushing_ball_bearings.html
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Burl

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Re: What do I need for drilling with DWC?
« Reply #9 on: May 15, 2013, 06:16:13 PM »
Butch
If you are drilling 1/8" holes than just use the 1/8" adapter.
I just did a guitar body and had to drill holes for the strings. It worked perfect.
One thing about drilling is you need to do a pecking pattern. this is where you go down about 1/8" than out than go back down another 1/8" until you are through.

Burl

Butch Elrod

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Re: What do I need for drilling with DWC?
« Reply #10 on: June 05, 2013, 02:08:44 PM »
I've been drilling these cribbage boards .375" deep with a single plunge and the feed rate set at F40.  The drill was cut off about mid way up the flute to make it rigid.  I resharpen it after 3 boards (1,173 holes). 

Short video at:
http://youtu.be/T8kwX4mGxr4
 
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Burl

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Re: What do I need for drilling with DWC?
« Reply #11 on: June 06, 2013, 04:33:04 AM »
Butch
Thanks for sharing the video. This is a good application for the DWC. Can you image drilling all those holes and get them perfect.

Burl

Butch Elrod

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Re: What do I need for drilling with DWC?
« Reply #12 on: June 06, 2013, 07:07:08 AM »
Quote
Code: [Select]
Can you image drilling all those holes and get them perfect.


I possibly could but I don't want to  ;)
I drilled a board for a wood worker who was amazed at the 10 minute drill time.  He said it takes him an hour with a drill press and template.

Here's one of my cribbage boards drilled, carved, sprayed with stencil ink, then planed to remove the ink.
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Troy H

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Re: What do I need for drilling with DWC?
« Reply #13 on: May 26, 2015, 06:19:19 PM »
I've figured out how to lay out a hole pattern, but seem to have trouble properly setting everything up to run on the machine. Can someone walk me through the best way to set up hole drilling? Is there a tutorial out there I haven't found?

Thanks
Troy

Butch Elrod

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Re: What do I need for drilling with DWC?
« Reply #14 on: May 27, 2015, 10:27:37 PM »
I've figured out how to lay out a hole pattern, but seem to have trouble properly setting everything up to run on the machine. Can someone walk me through the best way to set up hole drilling? Is there a tutorial out there I haven't found?

Your pattern needs to be single point locations
(NOT circles like I tried the first time.)

When importing the dxf of your hole pattern into CNC USB, chose Advance button, Safe Height tab, then set Base Height to your hole depth (-0.125" for example).  If drilling small holes in wood (like the cribbage board), peck drilling is not necessary.

For my cribbage board setup, I cut the drill-bit in half to prevent flexing during a single plunge drill.
~~~~~
Chainsaw carvings, sawmill services, and CNC routing.
http://www.WoodHacker.com/