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Feb 26, 2008, 01:29 AM
Just fly it!
wyowindworks's Avatar
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CNC Hot-wire Machine Build


Since an un-named shipping company lost a whole pallet of 1/64" ply, my production is stalled . I been wanting to get going on my CNC hot-wire machine, so, now is the "ordained" time. I thought I'd let you all see the process.

The cutting table will be 41" x 26". That should do most wing panels. I'll be using high quality linear bearings (no drawer slides here). Most of the framework will be made out of stacked 1/2" 9 ply Finnish birch plywood.

The hardware consists of:
24 volt power supply
4 axis CNC stepper motor driver
4 Nema 23 stepper motors
2 Sets of 26" linear bearings
1 Set of 11" linear bearings
2 1/2-10 ACME RH 36" thread
2 1/2-10 ACME RH 18" threads
4 1/2-10 RH Delrin flanged nuts
$30 of metrics fasteners, screws, and bushings.

Today I got the laminations glued up for the side rails and the pieces cut for front and back rail. Once this framework is squared and leveled the table top will be attached.
Last edited by wyowindworks; Feb 26, 2008 at 02:32 AM.
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Feb 26, 2008, 08:50 AM
Chuck 'Em and Chase 'Em
Fly2High's Avatar
Where did you buy the hardware from? How much was it?

What software will you be running?
Feb 26, 2008, 11:26 AM
Just fly it!
wyowindworks's Avatar
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I got all the hardware from Ebay for around $400.

I think I'll try Foamworks for software.
Feb 26, 2008, 04:49 PM
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wyowindworks's Avatar
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Build Session 2


I got the side rails milled to receive the bearings and allow room for the ACME thread. I used a dado head in the table saw to do this. I ran the top of the rails through the jointer to square and flush it before milling.

I glued reinforcement rails to the front and back rail as well as drilled the holes to receive the stepper motors.

Time to eat some lunch and get back to it!
Last edited by wyowindworks; Feb 26, 2008 at 04:58 PM.
Feb 26, 2008, 09:12 PM
Just fly it!
wyowindworks's Avatar
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Build Session 3


I got the frame assembled after lunch and the horizontal bearings and plates installed.

The bearingd are pretty impressive. They have zero play!

Good fun so far. Hope to cut some cores by the end of the week.
Last edited by wyowindworks; Feb 26, 2008 at 10:15 PM.
Feb 26, 2008, 11:34 PM
Registered User
wyo,

I think this is so freakin' cool....thanks for posting.

JSS
Feb 27, 2008, 12:40 AM
Just fly it!
wyowindworks's Avatar
Thread OP
Thanks, I'm having fun. Kinda brings me back to my cabinate build days....except I can be a bit more sloppy .
Feb 27, 2008, 04:48 AM
dougmontgomery's Avatar
Nice craftmanship!!!!I do not have time to build one!!! I will watch.
Doug
Feb 27, 2008, 10:44 AM
Just fly it!
wyowindworks's Avatar
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Thanks, Doug. I'm off for build session #4. My crate of ply is supposed to show up today.....that means I'm going to have to get back to real work tommorrow.
Feb 28, 2008, 05:41 PM
Just fly it!
wyowindworks's Avatar
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Build Session #5


This morning I mounted the linear bearings into the vertical axis carriages, milled the stepper motor mounting blocks, milled the bushing mounts for the vertical axises, and made the ACME nut mounts for the vertical axis. I had to make another trip to the hardware store for fasters and duminahickies.

Feeling a little tired from making all the parts.
Feb 28, 2008, 05:45 PM
Registered User
Ward Hagaman's Avatar
Looking good!

You, sir, are a madman.

My projects move along at a snail's pace compared to you. Very inspirational.
Feb 28, 2008, 08:28 PM
Duane, LSF IV
Wazmo's Avatar
Who makes the linear bearings and Delrin ACME flange nuts you're using?
How would MDF compare to plywood for the framework?
Feb 28, 2008, 08:47 PM
Just fly it!
wyowindworks's Avatar
Thread OP
The bearings are made by IKO and I got the Delrin ACME flange nuts off ebay. The Delrin nuts fit very well with no noticeable play. They don't really have a brand name. I think somebody in a mill shop just makes them. There are some on ebay now: ACME flange nuts

MDF would probably be fine. The corners of MDF break off really easy and it doesn't hold fasteners as well IMHO.

I got the vertical axises completed this afternoon. I'll post some pics when I get a chance.
Last edited by wyowindworks; Feb 28, 2008 at 10:41 PM.


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