Ruffel's cnc cutting journey

**DuffelBuffelWuffel** · 08-09-2015

It is almost as high as two toiled paper roils stacked.

I'm currently thinking on how I'm gonna run my air lines.
13mm ID from pump to the mill head and split it there to 2x6mm ID or do it directly at the pump....
not sure yet , do you guys have tips ?
(system won't let me edit the post above)

**Boyan Silyavski** · 08-09-2015

What are you trying to do, a mist system? you need an reservoir under pressure and air coolant mix valve and 1mm nozzle, system pressure 2.5 bar. Datron uses direct pressure liquid pump and 0.4mm? nozzles or sth like that.

aluminum best is done with 2 stage process:
-roughing
-finishing

1 flute or 2 flute, up to three, depends on geometry and slot cut or no.

6mm bit seems to be the best for home use

try something conservative and speed it up / the feed rate/ and or increase the depth pass:
12000RPM, 1.5mm pass depth , 800-900mm/min

kerosene works best, or just mist spray proper coolant mixture

you will do nothing without a coolant, just brake bits

my test show that 4mm tubing/2.5mm inside/ is ok, so it does not matter in your case

**DuffelBuffelWuffel** · 08-09-2015

Yes I'm doing an mist system. I ordered two of these:

http://www.ebay.co.uk/itm/Mist-Coola.../252043904329?

I did some googling and other people seem to have good luck with these aquarium air pumps. Most of them use the 80 l/min models but recommended going 120l/min +.
So I just got the biggest one. A compressor would be just to loud for my situation. And the paintbrush one's seem to have a hard time to keep up with the airflow.

If it does not work out than I will just return it in 14 days and get my money back. In that case a paintbrush / real compressor will be the alternative.
People who use compressors seem to be running these nozzles <1 bar so I think I'm alright.

As a liquid I'm testing lamp oil or ethanol , these both should work out fine.

The 280 l/min might be a bit much for my two little misting units , so it is possible that I need to add 2-3 more or just some copper to get some more volume trough it.

here is somebody running a 65-120l/min system:
https://www.youtube.com/watch?v=_X9TPBCdGyo

Thank you for the recommendation. I will defiantly try it.

**Clive S** · 09-09-2015

Yes I'm doing an mist system. I ordered two of these:

These look like the same at a third of the price.

http://www.banggood.com/Mist-Coolant...-p-979642.html

**DuffelBuffelWuffel** · 09-09-2015

Yeah I know. I just wanted to have it before the weekend.

**Boyan Silyavski** · 09-09-2015

Originally Posted by JAZZCNC

The chips being cold is not a good thing. They should be so hot they hurt when they hit your skin and the part should be cool...

my legs are witness to that ...

Welcome back Dean!

Originally Posted by Clive S

These look like the same at a third of the price.

http://www.banggood.com/Mist-Coolant...-p-979642.html

Thanks Clive,
i have browsed and browsed but have not seen these

Originally Posted by DuffelBuffelWuffel

Yeah I know. I just wanted to have it before the weekend.

Then make something provisional. By the way a quiet airbrush compressor like mine 17l/min is enough when using the proper nozzle and making fine mist.

Much prefer mixing air with coolant as a cup of coolant could provide cutting all day long

here is my system:

On first video you could see the system and the damned mist when too much flow. Watch HD quality ant see how the light shows the mist in the air. What i am saying is it should not be like that cause after 5 min you could hardly breathe in the workshop.

On second video is properly tuned and spraying just the minimum. The air when thin is so strong that will blow crap from 20mm cutter from 20cm distance and clean properly before the cut . Plus no problem breathing in the workshop