Stainless steel cutting on Bystronic 4020 3kw
Stainless steel cutting on Bystronic 4020 3kw
(OP)
I have a problem with cutting stainless steel.
I started to cut with N2 5.0 and managed to get a fine cut. My focus point was +4.0, the gas pressure was around 11bar.
After that I changed the cutting gas to O2 and continued cutting steel, the cut was horrible. But before cutting with N2 it was ok. I tried everything and when I finaly changed the lens the cut was fine again.
I spoke with a bystronic service and he said that it is because of the reflection from the staliness steel.
On the lens I cant see any scratch or cracks but somthing happend to it.
Could anyone explain this?
Best regards,
Imre.
I started to cut with N2 5.0 and managed to get a fine cut. My focus point was +4.0, the gas pressure was around 11bar.
After that I changed the cutting gas to O2 and continued cutting steel, the cut was horrible. But before cutting with N2 it was ok. I tried everything and when I finaly changed the lens the cut was fine again.
I spoke with a bystronic service and he said that it is because of the reflection from the staliness steel.
On the lens I cant see any scratch or cracks but somthing happend to it.
Could anyone explain this?
Best regards,
Imre.





RE: Stainless steel cutting on Bystronic 4020 3kw
http://www.iiviinfrared.com/pdfs/II-VI_LSA002W_dat...
maybe your machine came with polarization cards to test this?
I would suggest you cut .187 and up Stainless with a 7.5" not a 5"
RE: Stainless steel cutting on Bystronic 4020 3kw
RE: Stainless steel cutting on Bystronic 4020 3kw
RE: Stainless steel cutting on Bystronic 4020 3kw
When the focus was -1.2 (like i would use for mild steel) the cut left sharp jagged edge.
With the +4.0 focal point the cut was smooth, perfect. But after we went back cutting mild steel
the cut was bad.
As the I said the technical service also said the lens was probably stressed (reflection).
RE: Stainless steel cutting on Bystronic 4020 3kw
-HR
RE: Stainless steel cutting on Bystronic 4020 3kw
easier way- open notepad on a computer with an LCD screen. The white LCD screen is an excellent polarized diffuse light source and you probably have an LCD screen on the laser anyway. Then get one ploarizing filter or even a pair of polarized sunglasses and hold the lens between the light source and polarizer filter. Rotate the polarizer and if there's any stress in the lens you'll see it clear as day.
My customers will try this and not see anything, maybe they'll see some clovers where the lens clamp ring was pressing on the lens. Then they'll find a lens that looks fine but the polarizer shows all hell breaking loose inside. As you rotate the polarizer the amount of light coming through should change, if it doesn't then you don't have an LCD screen or the polarizer isn't a polarizer.
Chris Krug http://krugtech.com/
Maximum Up-time, Minimum BS