Wow this cnc stuff was no small undertaking, finished converting the mill (Industrial Hobbies kit) a few weeks back then added flood coolant (as you can see coolant containment is a work in progress :D) then set about learning Onecnc, finished my first program this weekend, then got the computers talking on a wireless network and (drum roll) finally the mill is making parts. Less there be any doubt why IH coolant proofs everything just look at the coolant flooding all over the cnc parts.

http://coilbuilders.com\pics\firstpart1.jpg

Here's a closeup, I can't really call those chips they are more like plastic curly fries. Hmmm looks like I still have some brown goop to clean off the spindal.

http://coilbuilders.com\pics\firstpart2.jpg

Here's half the part, I had to split this into 2 programs as the OD is 13 inches and I only have 9 inches of travel on Y. All total there are 640 3/16" holes drilled. This put Onecnc's fancy new hole feature recognition to the test and it performed wonderfully, all I did was click the mouse a few times and poof a few thousand lines of deep hole peck drilling code was born.

The part if anyone is interested is an experiment board for winding concentric coplaner metal detector coils, supports coils 7 to 13 inches OD.

http://coilbuilders.com\pics\firstpart3.jpg

Is that cutting board I see on the table :)

That Idea looks familiar.

Thanks
Aaron Moss
www.IndustrialHobbies.com

Looking very good, and now all that work is turned into reality, congratulations. Actually 9" Y travel is really good for a little machine.

Yeah you caught me pilfering yet another idea from your web site. Those cutting boards are so cheap compared with buying 1/2 inch plastic plate that I purchased several, that's a second one I'm drilling full of holes on the mill.

It cuts very nice, I drilled it 15ipm at 1,100 rpm and I think I could have sped that up quite a bit. Cobalt bit.

Is that cutting board I see on the table :)

That Idea looks familiar.

Thanks
Aaron Moss
www.IndustrialHobbies.com

Thanks, yeah it only comes with barely 7 inches of Y travel, I bumped it out 3 inches. I have 9 7/8 on Y but left some room for uh...error. lol

Looking very good, and now all that work is turned into reality, congratulations. Actually 9" Y travel is really good for a little machine.

Here's the finished part, circle is 13 inches OD, roughly 640 holes 3/16 x .400 deep.

http://coilbuilders.com/pics/firstpart4.jpg

CNCPlastic: Brilliant!
How did you relocate it when you turned the workpiece for the 2nd pass?

very nice

He wrote it's for winding metal detector coils. May I guess that pegs are put in the holes in an omega pattern and the wire is wound over the pegs?

thats pretty cool man. what are you using for coolant? it looks like strait water.... maybe some antifreeze? thats probably not good on the machine, get some real stuff, you wont regret it, kinda sucks that most places only sell it in 5 gallon pails or bigger, luckily I could get mine from work.

Jon

Dumb luck really, I turned it around, zero'd X and Y again and it was right on.

What I should have done is clamped the part down, zero'd X and Y, then use the mill to cut two alignment holes equal lengths apart on the part center line. That would have assured that when turned the part around everything would be perfectly positioned.

CNCPlastic: Brilliant!
How did you relocate it when you turned the workpiece for the 2nd pass?

Yes on the pegs, these coils are simply round however I know the omega style you mentioned. Transmit coil outer, receive coil inner, bucking coil around receive coil. In this case the receive coils are half the size of the transmit thats why the inner circles are so close together. Next up another jig for winding induction balanced double D coils.

He wrote it's for winding metal detector coils. May I guess that pegs are put in the holes in an omega pattern and the wire is wound over the pegs?

Thanks. I'm using Tri-Cool 1 Synthetic by Trico. They sell 1 gallon jugs and shipped it right to my house. I don't remember if I purchased it from them directly or via a distributor. It mixes 20 parts water to 1 part coolant for general machining flood applications. 10 to 1 for heavy machining.

Here's what the jug says...

Extreme pressure additives for high performance machinging
Helps prevent rusting on tool and machine surfaces
Foam resistance
Pleasant to use, non-irritating
Resists bacterial and fungal attacks
Mild pH
Solvent-free, no hazardous vapors
Biodegradable
Oil free

For use in spray or flood applications

www.tricomfg.com