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Old Aug 09, 2009, 01:39 PM
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dspecgsx's Avatar
Ohio
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CNC Router - Homemade

About 3 months ago I decided to expand my tools used for hobby making. I decided to make a CNC router that would handle 36 inch balsa stock to make some of my own kit designs.

I am still learning much about CNC but I thought I would post some pictures and a video of the router in action. In the photos I am starting to cut the wing ribs and the fuselage sides to my new design. I haven't named my new model yet but it will be a cross between a hotliner and glider.

If anybody has questions on how the CNC works I can surely expand on this.

Youtube video link:
Rib Layout (1 min 15 sec)
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Old Aug 09, 2009, 01:51 PM
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United States, WA, Hoodsport
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Incredible! Nice work.

I have to ask; do you use a "sacrifice" piece of wood underneath the work piece as not to score the CNC's table top?

Also, the red alloy part that's holding the Bosch trim router, is that a vertical adjustment fixture from a router table?

Thanks!

EJWash
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Old Aug 09, 2009, 04:18 PM
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Very, very nice!
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Old Aug 09, 2009, 05:13 PM
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nice, I would like to get some plans for this. is that possible?

what software are you using?
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Old Aug 09, 2009, 06:48 PM
yyz
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USA, CA, Paso Robles
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Well you definitely live up to your Yoda avatar! Very nice. Can you describe roughly what software you're using to create the geometry and instructions to drive the tool? Did you write the control software yourself?

Not trying to nerd up the conversation, just curious of you used open sources or commercial stuff.

The CNC skills are strong in this one,

Mike
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Old Aug 09, 2009, 08:21 PM
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Rockwall, TX
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Totally awesome. Wish I had these kind of mad skills!!!
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Old Aug 10, 2009, 12:16 AM
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Very neat!!!

Going to offer cutting services?
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Old Aug 10, 2009, 08:16 AM
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Ohio
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Thanks all...I'll try to answer the questions:

EJWash1 - Yes I use a piece of sacrificial material under the part I'm cutting. It's 3/16" pegboard material. The "red alloy" part is my Z-axis and it has a capacity of 4 inches of travel up and down.

Mecha - I do not have rolled blue prints but I do have the Solidworks 2009 files I used for design. Its about 60mb of CAD files and includes everything from all my research and learning along with manuals and documents of some of the items I used in the design. I would give these away for free for those who want it. Please know there are no instructions...just my thoughts on CAD files. The software I use is Mach3 and Cut2D.

yyz - I guess the best way to describe how it goes from coumputer to part is to say:
1. I use Solidworks 2009 as my CAD program. Other Cad programs would also work.

2. I then import the CAD file in a program called Cut2D. This software gets the part ready to be sent to the CNC program using G-code.
http://www.vectric.com/WebSite/Vectr.../c2d_index.htm

3. Then I use Mach3 (CNC program) to set up my cut file in virtual space to be cut on my physical machine.
http://www.machsupport.com/

4. When I press the "GO" button on the computer to cut my file, the G-code travels through my parallel printer port to a controller to control my steppers / servos for 3 axis (XYZ). There are many controllers available but the one I use is called the Gecko.
http://www.geckodrive.com/product.aspx?c=3&i=14469

5. At that point the machine comes alive and starts cutting.

DT56 - Cutting services might be in the future.

My goal was to build a machine under 1k. I built it for about $850 ready to cut. The machine cutting dimensions are 4 x 16 x 32.
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Old Aug 10, 2009, 01:06 PM
I survived La Bajada!
United States, CO, Thornton
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I am interested to see more steps in building the machine. Where did you get parts for it?
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Old Aug 10, 2009, 01:51 PM
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Cool CNC Machine!

Bigger Than Mine



I too use Mach3 But i use sheet CAM and Rhino 0.4 Cad

Its quite interesting to learn, i really enjoyed making mine!

Any way a few pictures i hope i dont ruin your thread!

You Need a sound box, i can cut at 1am and its super quiet!













Just one more question, i use 1mm endmills - yes they snap all the time! so i resorted to snapped drill blanks!

what do you use?
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Old Aug 10, 2009, 03:50 PM
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Ohio
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Quote:
Originally Posted by jasbury1
I am interested to see more steps in building the machine. Where did you get parts for it?
The z-axis was designed and machined by myself.
Components on the machine come from various places. I'll list a few big suppliers:
http://www1.mscdirect.com/cgi/nnsrhm
http://www.mcmaster.com
http://www.cncrouterparts.com/
eBay for steppers. - cncrouterparts in the future
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Old Aug 10, 2009, 03:55 PM
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Ohio
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Quote:
Originally Posted by QUIKSILVER
Cool CNC Machine!
Just one more question, i use 1mm endmills - yes they snap all the time! so i resorted to snapped drill blanks!

what do you use?
For balsa and ply I use 1/16" (1.5mm) carbide down spiral endmill. I have not snapped one yet. If you are snapping endmills at a low feed rate, you could have a run-out problem on the spindle....just a guess.

You setup looks great by the way...congrats.

It's a whole different hobby.
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Old Aug 10, 2009, 04:43 PM
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Quicksiler,
what are your speeds and feeds? what's the max rpm for the router motor?

both machines are very cool. i may have to build one of these someday.
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Old Aug 11, 2009, 06:15 AM
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Quote:
Originally Posted by sgtdirt
Quicksiler,
what are your speeds and feeds? what's the max rpm for the router motor?

both machines are very cool. i may have to build one of these someday.
I think i got a bad batch of endmills 3 flute 9single or doube would be better i know)

max feed is 600m/s on X and 700m/s on Y so it rapids really quick!

i have a Kress mill and jits 30,000 rpm
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Old Aug 16, 2009, 09:02 PM
Howdie Doo Dat ?
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Pleasant Valley Modelport
Joined Sep 2006
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You want to sell rib sets ? I could specify the airfoil and chord + spar locations. First customer ?
Name a price for 10, 3/32 inch quarter cut balsa. 6, 1/8 inch plywood, all 7.5 inch chord, NACA 2412 .
As far as I know, I need one top, one bottom 1/4 inch spar cut at ~28%.

CH
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