need cut conditions for mild steel 4

[drossfree]

could somebody send me cut conditions for mild steel we generally cut ss and my cut conditions are fine but mld steel cuts very bad with existing conditions. machine type is Amada FO3015 with 4kw resonator. any help would be greatly appreciated.

 

[1plus1]

What are your cutting conditions exactly? Focal point, feed rate, oxygen pressure, power settings, etc.

 

[drossfree]

focal point frequency duty power speed oxygen pressure for 0.034" to 0.5" any help would be appreciated

 

[jetrep]

3/8" HRS
E4 75"/MIN 4000W 2000HZ 100 DUTY GAS 0.08 NOZZLE GAP .030"

1/2" HRS
E4 45"/MIN 4000W 2000HZ 100 DUTY GAS 0.08 NOZZLE GAP .030"

FOCAL POINT AROUND +.050" FOR BOTH, 7.5" LENS, 1.4MM DOUBLE NOZZLE

you might have to slow the feed rate a bit. We have had some success getting nicer edge quality with gas pressure set to 0.10

 

[msandoval]

Same cut conditions as jetrep, use full power, the 7.5" Lens, and a 1.4 mm double nozzle. Do check your AC Settings. If using an NT Control I believe it should be set to 3 and yes the focus would be a positive number. If using an older CNC Control then the cut type should be set to Thick and the focus should be a negative number.

A couple of things to consider also would be the quality of the material you are cutting. This makes a huge difference.

By the way, once you set the duty cycles to 100% the frequency is ignored because you are now cuting with Continous Wave (CW).

 

[drossfree]

thanks guys ill give it a try but i also need for thin material such as 16 guage 11 guage

 

[msandoval]

16 gauge should be easy to cut by simply using a 5.0" Lens with a 1.2 mm single nozzle with .30 MPA (or 2 kgs or bars) and a focus of 0 or 0.020", 1200 Watts and about 180"/min with oxygen.

11 Ga you could use the same set-up but instead the gas pressure should be lowered to .15 and speed to about 140"/min.

I guess my only question to you would be: Have you done a focus test on your lenses or you just put them in when you replace them with a new?

 

[drossfree]

yes i do focus test when swapping lenses but i rarely cut mild steel and the operator who ran the machine before me changed everything in all the cutting conditions. my problem is i have now 7 years experience running a laser but 6 of those were running trumpf mahines and ièm still learning the amada setups. another question for you would be why is the beam dia so large inside the beam tube. on trumpf machines beam dia does not exceed 20mm dia whereas on this amada macine beam dia is about 40mm. ifind this too large any thoughts.

 

[msandoval]

It is the way the resonator was designed. Obviously Trumpf's glassware is a lot smaller in diameter. Where the Trumpf will have a great advantage cutting stainless and aluminum faster because of the power concentration and the smaller beam diameter, the Fanuc will have an advantage on cutting thick carbon steel because of the wide beam.

Do understand also that Fanuc is mainly a control, drives, and robotics company and not a laser company like Trumpf that invests heavily in R&D for laser where it makes its money. One great thing about the Fanuc though is its reliability and despite the larger beam diameter it can still cut a wide variety of materials. It just won't cut as fast as say the Trumpf or Bystronic Resonator. One of the good things about it are its modular power supplies that generate the high voltage, something Trumpf doesn't have and instead uses the RF Tube that can cost a pretty penny. Not that this is bad, it's just a different method.

I must say that it's easier to transition from a Japanese machine to a European machine than vice-versa. You are just getting to learn the machine and with time you'll do just fine.

 

[JayMaechtlen]

Greetings...

I believe the previous comments about beam diameter in the system (upstream of the lens) are totally backwards.

There are several reasons to want a large beam going into the lens:

1. you can get a tighter focused spot for a given lens focus length

2. you can get a longer beam waist for any given spot size ?

3. less beam intensity on the lens surfaces. (though maybe the longer path from center to edge nullifies this?)

At least, these were my understandings while at Amada.
Is this no longer the case?

Regards
Jay


Jay Maechtlen

http://home.covad.net/~jmaechtlen/

 

[sorted]

Have you looked at your cutting conditions book for your FO

 

[sorted]

Yes I have all of mild steel cutting data for the FO.