Jagged Edge on SS w/N2 assist

[QSF]

We run a Mazak Super Turbo X-510 1500 watt laser and are having trouble cutting stainless with nitrogen assist gas. We're not quite understang why, but we keep getting a jagged edge on one side of the cut. The jagged edge seems to be the side closest to the clamps when traveling in the X axis. When traveling in the Y axis the jagged edge jumps from one side to the other. We checked the nozzle (with scotch tape) and it seems to be centered properly. We have also tried to increase the gas pressure to 7kg(according to the gauge on the nozzle; i think thats about 100psi) and we have tried to speed the feedrate up. We would appreciate any feedback anyone can give. Also, if anyone has any cutting conditions for .250 or .125 zinc and any cutting conditions for Lexan it would help us very much.
We would like to thank anyone in advance for their help- and thanks to the creators of this board. Gary L. Ellis Jr.
Quality Steel Fabrication
Sidney, OH

 

[QSF]

Also, if anyone has a similar laser and can email us 14ga and 11ga ss cutting conditions with N2 assist gas we would greatly appreciate it. That will give us some sort of a base to compare our conditions to. Gary L. Ellis Jr.
Quality Steel Fabrication
Sidney, OH

 

[mazakoper]

I dont know if you tried this but lower your focus that usally takes care of it.

 

[mazakoper]

DID IT WORK FOR YOU IF NOT TRY TO ACCELERATE AFTER LEAD IN. YOUR LEAD IN SHOULD BE ONE THIRD OF YOUR FEAD RATE

 

[QSF]

YES, THNAKS. LOWERING THE FOCAL POINT HELPED TO IMPROVE THE CUT, BUT WE STILL ARE GETTING A JAGGED EDGE. ITS NOT ALL AT ONCE...JUST HERE AND THERE- AND VERY DIFFICULT TO CLEAN OFF. IF ANYONE HAS ANY CUT CONDITIONS FOR MAZAK 1500W THAT THEY WANT TO DONATE, I WOULD APPRECIATE IT.

ALSO IF ANYONE HAS CUT ANY TYPE OF CERAMIC-TYPE MATERIALS I WOULD APPRECIATE THE HELP WITH ANY CUT CONDITIONS. THE MATERIAL I AM TRYING TO CUT NOW IS CALLED DME INSULATOR FROM A MOLD BASED COMPANY.

THANKS IN ADVANCE FOR ANY HELP.


Gary L. Ellis Jr.
Quality Steel Fabrication
Sidney, OH
gellis@woh.rr.com

 

[mazakoper]

THESE ARE A 5INCH LENS
O8021
(24GA SS 5.0 LENS)
G82P1500Q200R35
G88P55M58
G87P0
M32
M20
M22
G04X0.2
G82P1500Q100R100F260
G04X0.1
M99
O8022
(24GA SS 5.0 LENS)
G82P1500Q200R35
G88P55M58
G87P0
M32
M20
M22
G04X0.2
G82P1500Q100R100F260
G04X0.1
M99
O8030
(22GA SS 5.0 LENS)
G82P1000Q150R15
G88P10M56
G87P-1
M32
M20
M22
G04X0.5
G82P1000Q500R80F310
G04X0.1
M99
O8031
(22GA SS 5.0 LENS)
G82P1500Q200R35
G88P55M58
G87P0
M32
M20
M22
G04X0.2
G82P1500Q500R100F285
G04X0.1
M99
O8032
(22GA SS 5.0 LENS)
G82P1500Q200R35
G88P55M58
G87P0
M32
M20
M22
G04X0.2
G82P1500Q500R100F285
G04X0.1
M99
O8041
(20GA SS 5.0 LENS)
G82P1500Q200R35
G88P60M58
G87P-4
M32
M20
M22
G04X0.05
G82P1500Q500R100F230
G04X0.05
M99
O8042
(20GA SS 5.0 LENS)
G82P1500Q200R35
G88P60M58
G87P-4
M32
M20
M22
G04X0.05
G82P1500Q500R100F230
G04X0.05
M99
O8060
(16GA SS ETCH)
G82P300Q150R7F85
G88P10M56
G87P15
M32
M20
M22
M99
O8061
(16GA SS 5.0 LENS)
G82P1500Q100R55
G88P75M58
G87P0
M32
M20
M22
G04X0.3
G82P1500Q500R100F170
G88P8.0M54
G87P-4
G04X0.05
M99
O8062
(16GA SS 5.0 LENS)
G82P1500Q100R55
G88P75M58
G87P0
M32
M20
M22
G04X0.3
G82P1500Q500R100F170
G88P8.0M54
G87P-4
G04X0.05
M99
O8070
(14GA SS 5.0 LENS)
(NF -0.08)
G82P1500Q100R55
G88P20M58
G87P0
M32
M20
M22
G04X0.5
G82P1500Q500R100F50
G88P10M54
G87P0
G04X0.1
M99
O8071
(ACCELERATION FOR 14GA SS)
G82P1500Q500R100F100
M54
G87P-4
M99
O8072
(ACCELERATION FOR 14GA SS)
G82P1500Q500R100F100
M54
G87P-4
M99
O8075
(14GA SS 5.0 LENS)
(NF -0.08)
G82P1500Q100R55
G88P20M58
G87P0
M32
M20
M22
G04X0.5
G82P1500Q500R100F50
G88P10M54
G87P0
G04X0.1
M99
O8110
(12GA SS 5.0 LENS)
(NF -0.120)
G82P1500Q100R55
G88P20M58
G87P10
M32
M20
M22
G04X0.45
G82P1500Q500R100F25
G88P10M54
G87P10
G04X0.1
M99
O8111
(ACCELERATION FOR 12GA SS)
G82P1500Q500R100F65
M54
G87P-4
M99
O8112
(ACCELERATION FOR 12GA SS)
G82P1500Q500R100F65
M54
G87P-4
M99
O8115
(12GA SS 5.0 LENS)
(NF -0.120)
G82P1500Q100R55
G88P20M58
G87P10
M32
M20
M22
G04X0.45
G82P1500Q500R100F25
G88P10M54
G87P10
G04X0.1
M99
O8140
(10GA SS. 7.5 LENS)
G82P1500Q200R55
G88P20M58
G87P0
M32
M20
M22
G04X.7
G82P1500Q100R100F15
G88P11M54
G87P0
G04X.7
M99
O8141
(ACCELERATION FOR 10GA SS)
G82P1500Q100R100F45
M54
G87P-5
M99
O8142
(ACCELERATION FOR 10GA SS)
G82P1500Q100R100F45
M54
G87P-5
M99
O8145
(10GA SS. 7.5 LENS)
G82P1500Q200R55
G88P20M58
G87P0
M32
M20
M22
G04X.7
G82P1500Q100R100F15
G88P11M54
G87P0
G04X.7
M99

 

[mazakoper]

O8021
(24GA SS ALL 7.5 LENS)
G82P1500Q200R35
G88P55M58
G87P0
M32
M20
M22
G04X0.2
G82P1500Q100R100F200
G04X0.1
M99
O8022
(24GA SS ALL 7.5 LENS)
G82P1500Q200R35
G88P55M58
G87P0
M32
M20
M22
G04X0.2
G82P1500Q100R100F200
G04X0.1
M99
O8030
(22 GA SS SKEL 7.5 LENS)
(NF -0.04 0.077 NOZ)
G82P1000Q150R15
G88P10M56
G87P-1
M32
M20
M22
G04X0.5
G82P1000Q500R80F310
G04X0.1
M99
O8031
(22 GA SS SKEL 7.5 LENS)
(NF -0.04 0.077 NOZ)
G82P1500Q200R35
G88P55M58
G87P0
M32
M20
M22
G04X0.2
G82P1500Q500R100F285
G04X0.1
M99
O8032
(22 GA SS OPEN ENT. 7.5 LENS)
(NF -0.04 0.077 NOZ)
G82P1500Q200R35
G88P55M58
G87P0
M32
M20
M22
G04X0.2
G82P1500Q500R100F285
G04X0.1
M99
O8041
(20GA SS ALL 7.5 LENS)
G82P1500Q200R35
G88P55M58
G87P0
M32
M20
M22
G04X0.2
G82P1500Q100R100F160
G04X0.1
M99
O8042
(20GA SS ALL 7.5 LENS)
G82P1500Q200R35
G88P55M58
G87P0
M32
M20
M22
G04X0.2
G82P1500Q100R100F160
G04X0.1
M99
O8060
(16GA SS ETCH)
(NF -0.04 0.077 NOZ)
G82P400Q150R7F85
G88P10M56
G87P15
M32
M20
M22
M99
O8061
(16GA SS ALL 7.5 LENS)
(NF -0.04 0.077 NOZ)
G82P1500Q200R35
G88P70M58
G87P0
M32
M20
M22
G04X0.4
G82P1000Q100R100F80
G88P70M58
G87P-4
G04X0.4
M99
O8062
(16GA SS ALL 7.5 LENS)
(NF -0.04 0.077 NOZ)
G82P1500Q200R35
G88P70M58
G87P0
M32
M20
M22
G04X0.4
G82P1000Q100R100F80
G88P70M58
G87P-4
G04X0.4
M99
O8070
(14GA SS ALL 7.5 LENS)
(NF -0.04 0.077 NOZ)
G82P1500Q200R35
G88P15M58
G87P0
M32
M20
M22
G04X0.5
G82P1500Q100R100F40
G88P10M54
G87P0
G04X0.1
M99
O8071
(ACCELERATION FOR 12GA SS)
G82P1500Q100R100F90
M54
G87P-5
M99
O8072
(ACCELERATION FOR 12GA SS)
G82P1500Q100R100F90
M54
G87P-5
M99
O8075
(12GA SS ALL 7.5 LENS)
(NF -0.04 0.077 NOZ)
G82P1500Q200R35
G88P15M58
G87P0
M32
M20
M22
G04X0.5
G82P1500Q100R100F40
G88P10M54
G87P0
G04X0.1
M99
O8110
(12GA SS ALL 7.5 LENS)
(NF -0.04 0.077 NOZ)
G82P1500Q200R55
G88P20M58
G87P0
M32
M20
M22
G04X0.6
G82P1500Q100R100F30
G88P10M54
G87P0
G04X0.1
M99
O8111
(ACCELERATION FOR 12GA SS)
G82P1500Q100R100F60
M54
G87P-5
M99
O8112
(ACCELERATION FOR 12GA SS)
G82P1500Q100R100F60
M54
G87P-5
M99
O8115
(12GA SS ALL 7.5 LENS)
(NF -0.04 0.077 NOZ)
G82P1500Q200R55
G88P20M58
G87P0
M32
M20
M22
G04X0.6
G82P1500Q100R100F30
G88P10M54
G87P0
G04X0.1
M99
O8140
(10GA SS. 7.5 LENS)
G82P1500Q200R55
G88P20M58
G87P0
M32
M20
M22
G04X.7
G82P1500Q100R100F15
G88P11M54
G87P0
G04X.7
M99
O8141
(ACCELERATION FOR 10GA SS)
G82P1500Q100R100F45
M54
G87P-5
M99
O8142
(ACCELERATION FOR 10GA SS)
G82P1500Q100R100F45
M54
G87P-5
M99
O8145
THESE ARE FOR 7.5 INCH LENS
(10GA SS. 7.5 LENS)
G82P1500Q200R55
G88P20M58
G87P0
M32
M20
M22
G04X.7
G82P1500Q100R100F15
G88P11M54
G87P0
G04X.7
M99

 

[Mitsuboy]

Hello,

A burr on one side usually means that the beam is not centered good enough. when cutting stainless it is very critical to have a centered beam!! The other cause for a Burr on one side is Constant Gas Pressure!! if you have a gas gauge mounted to or close to the head, note where the gas pressure Drops, You will most likely find a burr there!!

Are you using a Non-Contact Head or a spoon ?

do you have a Proportion Air Valve? (which ensures Constant accurate Gas Flow)!!

Hope this was helpful,

Dan

 

[ScottS]

A couple of other points. The beam could be wondering inside the tip do to misalignment or laser resonator problems. As Dan pointed out gas flow is also very important.

Does it always happen on the same spot on the machine or is it random and can it happen anywhere?

Scott

 

[axiomatrix]

With Stainless Steel, the dross on the bottom edge of the cut is mainly due to gas pressure and beam centrallity. We cut with N2 pressures exceeding 12Bar and focus set to the bottom surface. This gives a clear kerf and the Hi pressure gas clears the melt quickly before it freezes. The dross that appears only on one edge is usually due to beam alignment or the beam moving as the various axis move, ie the x axis move may produce dross but a move in the y is clear. You seem to have identified dross formation near the clamps, this would be consistant with a disruption of the gas exit flow as the cut passes near to a clamp body.