Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

need cut conditions for mild steel

need cut conditions for mild steel

need cut conditions for mild steel

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.

RE: need cut conditions for mild steel

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

RE: need cut conditions for mild steel

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

RE: need cut conditions for mild steel

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"


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

RE: need cut conditions for mild steel

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).


RE: need cut conditions for mild steel

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

RE: need cut conditions for mild steel

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?  

RE: need cut conditions for mild steel

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.

RE: need cut conditions for mild steel

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.

RE: need cut conditions for mild steel


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?


Jay Maechtlen

RE: need cut conditions for mild steel

Have you looked at your cutting conditions book for your FO

RE: need cut conditions for mild steel

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

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close