How do I clean up my cut ?

[thermeng2]

I have a 1500 watt mazak STX-48. I am cutting 1/2 ms and my edge is wavey but pretty clean on the bottom. I have raised my focal point .08 inches I am using a 1.5mm tip with a 5" lense. This is my pierce & cut program

:9500
( focal point is 2 turns up)
(1/2 HRMS PIERCE & CUT)
(PIERCE)
G83 P000 Q00 R00 F00
G82 P1500 Q20 R16 M69
G88 P03 M56
(G87P05)
M22
M32
M20
(M22)
M31
G04 X5.5
G82 P1500 Q38 R22
G04 X6.0
G82 P1500 Q43 R25
G04 X6.0
G82 P1500 Q57 R31
G04 X6.5
G82 P1500 Q65 R35
G04 X6.0
G82 P1500 Q160 R42
G04 X6.0
G82 P1500 Q250 R50
G04 X6.0
G82 P1500 Q100 R100
G04 X6.0
M01
G82 P000 Q00 R00
(G87P00)
(M99)
(CUT)
M69
G64
G83
G88 P05 M56
G82 P1000 Q50 R12
M20
M22
M32
G87 P00
G82 P1500 Q22 R23
G04 X2.0
M01
G82 P1500 Q3500 R90 M69 F25
G88 P04 M56
G4 X2.5
M99
%

What should I try to clean up the edge? I tried to lower the assist gas but got bad results from that. I tried to lower the power but got bad results. Would changing from M69 to M67 or M68 help? I don't know to much about the pulse mode and what it does? Any help whould be great !!!!

Thanks

 

[1plus1]

Do you have a test square program to try different cutting conditions and focal points on a scrap piece of 1/2 ms? Is your lens clean? Simply cleaning a lens or replacing an old or pitted lens will clean up a cut. A 1.5 mm tip maybe too narrow. Try something larger. Make sure beam is properly centered through tip. I am not familiar with Mazak lasers, but from experience with many other lasers, 1500 watts is pushing the limit with 1/2" mild steel. Your beam will need to have a good mode and good power to achieve a decent edge on 1/2" plate. You could try to cut with 80-90% pulse rate at your present feed rate or slightly slower. It may help.

 

[msandoval]

You may want to try using a 7.5" Focus Lens and a 2.5 mm to a 3 mm single or double nozzle as well. This may give you the result you are looking for. The 7.5" Lens is made for thick plate or thick material applications. The 5.0" lens is good for thin materials up to .250" thick.

Good Luck

laserdude

 

[thermeng2]

Thanks for you in put. I wont have time to try anything for a while now. But when I do I will give your ideas a try.

Thanks...

 

[thermeng2]

Hey I got it ! I used a bigger tip and my edge looks great. You are right it is pushing it but it is working....THANKS !!!