im building this >

https://grabcad.com/library/4-axis-cnc-hot-wire-cutter

Hello,

Do you have plans or photos ? Any idea of the cost ?

the plans are right there in the link, there are DXF files in a folder,

and there is a lot of 3d models but you have to have Solidworks to open these

i dont know how much it could cost but i have already made the mechanics for this one just waiting for the steppers and controllerboard



hot wire

Its ALIVE.

up and running but can anyone explain this picture?


[img]https://lh4.googleusercontent.com/VSPN9 ... w1920-h976[/img]

the upper side is the top of wing profile but the bottom of the profile is way off? is there some setting i need to change in cycle of cut manager?

Hi there,

I did use that design, and the machine will soon be finished. I made some minor modifications, as there was slight vibrations of the brass bushings on the SS rods.
I extended Y to have also 600mm rods , and changed the X slider design, as 150mm was too wide, and resulting in 8cm loss travel.

I will post pictures once done. I used ACME 8mm screws, and made low backlash nuts. Electronics is Arduino Mega, ramps 1.4 abd DRV8522. Simple, cheap and it works.
Wire is 2/10 Nichrome for below 1 meter, and 2/10 constantan for 2.3 meters, as it is needed to keep a relatively low electrical resistance for such a long wide.

Cheers!

Hi Folks,

I used the above solidworks plans, and I started to make the first guillotine yesterday.

I modified the design

1 - shortened the X slider as it was consuming quite some X travel.
2 - Added threaded rods on sliders close to the bronze bushings to make sure they do not vibrate. actually, I think Bronze bushings can be replaced with Plastic ones. Would be smoother.
3 - replaced spring based wire tension with counterweight > greatest possibility to increase wire angle.
4 - Adapted to Nema 17 steppers.

And last step not yet done : Will add a 5th axis turning table, as C axis.

One issue I noticed : I use 0.22mm Nichrome A wire, and when Y sliders are going done > Wire vibrates, making the effective diameter greater then 0.22mm. > I will replace the solid low backlash Y ACME nuts with spring preloaded nuts.

Some more pictures

Great job !!! -D