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Main Boards => The Bowyer's Bench => Topic started by: Mark Smeltzer on May 21, 2016, 09:23:00 PM

Title: CNC Milling Machines
Post by: Mark Smeltzer on May 21, 2016, 09:23:00 PM

Does anyone have any information on CNC mills that are available for a reasonable price and not to hard to program. Thinking of using it for risers, sight window and shelf.
Thanks,
Mark

Title: Re: CNC Milling Machines
Post by: fujimo on May 22, 2016, 11:11:00 AM

ever thought of a copy router- kinda like a copy lathe- just 3 d
lots of builds and units to buy
not as quick as a cnc machine- as you have to manually run it- but still way quicker and more consistent than manually- and its still "hand made" i guess
 http://www.easycarver.com/

Title: Re: CNC Milling Machines
Post by: fujimo on May 22, 2016, 11:17:00 AM

http://wood-carver.com/unispecs.html

 http://global.rakuten.com/en/store/techno-ns/item/t-wivamac-kpb4075/?s-id=borderless_recommend_item_en

Title: Re: CNC Milling Machines
Post by: Mark Smeltzer on May 22, 2016, 11:31:00 PM

Thanks for the link, I hadn't thought of those. I have looked at CNC routers though.
Mostly just want somthing to cut out the sight window and shelf.

Title: Re: CNC Milling Machines
Post by: fujimo on May 23, 2016, 10:30:00 PM

the easy carver link- looks like a nice easy build for a man of your skills.
 i see plans only cost about $50.

looks like it might be ideal for sight windows and even rough shaping of risers.
then when you have it built i can send you a rifle stock that i need duplicating   :D

Title: Re: CNC Milling Machines
Post by: Mark Smeltzer on May 23, 2016, 11:36:00 PM

YYou just gave me an idea! Thanks man!

Title: Re: CNC Milling Machines
Post by: Mark Smeltzer on May 24, 2016, 09:53:00 AM

I think Ill just give my router a try with a guide jig before i get too far along another path.

Title: Re: CNC Milling Machines
Post by: Mad Max on May 24, 2016, 02:09:00 PM

If you are going to make the same riser all the time you could get one of the duplicators.
I like to do everything by hand

Mark this is how I do it

First I layout my lines
     (http://i1293.photobucket.com/albums/b593/osagemark/site%20window/100_0827.jpg) (http://s1293.photobucket.com/user/osagemark/media/site%20window/100_0827.jpg.html)

I use my pattern sander with a piece of pylwood to get up above the rub coller
     (http://i1293.photobucket.com/albums/b593/osagemark/site%20window/100_0830.jpg) (http://s1293.photobucket.com/user/osagemark/media/site%20window/100_0830.jpg.html)

Then I sand to the line all I can get with the 3" diameter sander.
     (http://i1293.photobucket.com/albums/b593/osagemark/site%20window/100_0828.jpg) (http://s1293.photobucket.com/user/osagemark/media/site%20window/100_0828.jpg.html)

    http://www.bursforcarving.com/index.html    
the one on the right I use first
1st rasp click on Rasp Type burs  (FGR5BTN) This bur really cuts good!
2nd bur click on 1/4" Shank burs (BULLNOSE (RADIUS CYLINDER) SC-1SC
     (http://i1293.photobucket.com/albums/b593/osagemark/site%20window/100_0829.jpg) (http://s1293.photobucket.com/user/osagemark/media/site%20window/100_0829.jpg.html)

I take my patter sander off and chuck up the the rasp bur on the right. I use a larger piece of plywood on top of the drill press table. with the spindel handle all the way up I raise the table up to take a 1/8" cut.
 First pass, I pull and push the riser and follow close to the shelf line
     (http://i1293.photobucket.com/albums/b593/osagemark/site%20window/100_0831.jpg) (http://s1293.photobucket.com/user/osagemark/media/site%20window/100_0831.jpg.html)

I raise the table up more and make more cuts and stay away from the radius. now I am at .700 thick at the arrow rest.
     (http://i1293.photobucket.com/albums/b593/osagemark/site%20window/100_0832.jpg) (http://s1293.photobucket.com/user/osagemark/media/site%20window/100_0832.jpg.html)

Now I use the ball nose bur 1/4"
Don't take a full depth cut on the First pass.
With a firm grip follow the shelf line, go easy
     (http://i1293.photobucket.com/albums/b593/osagemark/site%20window/100_0833.jpg) (http://s1293.photobucket.com/user/osagemark/media/site%20window/100_0833.jpg.html)
I still have some hand rasping to do to finish off and relieve so the arrow only touches on one place on the site window
     (http://i1293.photobucket.com/albums/b593/osagemark/site%20window/100_0834.jpg) (http://s1293.photobucket.com/user/osagemark/media/site%20window/100_0834.jpg.html)

Title: Re: CNC Milling Machines
Post by: Mad Max on May 24, 2016, 02:14:00 PM

I had this tool when I was doing machine work so I use it to 45 the shelf
  (http://i1293.photobucket.com/albums/b593/osagemark/site%20window/100_0835.jpg) (http://s1293.photobucket.com/user/osagemark/media/site%20window/100_0835.jpg.html)

Title: Re: CNC Milling Machines
Post by: mikkekeswick on May 25, 2016, 02:21:00 AM

Umm...interesting stuff. Thanks for sharing that. I've just started messing about with burrs and I've been scratching my head as to how to utilise them fully.

Title: Re: CNC Milling Machines
Post by: Mad Max on May 25, 2016, 11:04:00 AM

Your x and Y are your arms and z is cranking the table up

   :biglaugh:

Title: Re: CNC Milling Machines
Post by: Mark Smeltzer on May 25, 2016, 09:58:00 PM

Nice work, that is somewhere along the lines of where I'm heading I think. Thanks for sharing that!!
That radius of the shelf to the sight window is a tough area to get perfect.