0.111” hot rolled steel sheet supposedly 14 Ga. but I always measure the sheet, ALWAYS!
0.072” torch height - I use the Langmuir small shim & a .012 feel blade/Gauge
.6mm nozzle
70 ipm
33 Amps
.2 pierce delay
Water table - had 0 warpage
Dross on back came right off! Took about 1-2 minutes to clean up.
Another 1-2 minutes on the front with a fine bristle pad
Yea, ordered 14 Ga. sheet.
But it was thicker then the typical 14Ga. Range
I always measure anyway with a micrometer every sheet
So I can get my cut set right on my machine.
Pick your poison!!
All cut really Good!
50 ipm is only one that had visible dross on the back. Rest we’re nearly dross free.
None had any dross on the front at all!
All the cuts were straight with no bevel and super clean!
Only real difference was the finished cut Kerf width.
See photos.
Looks to me like 70 ipm is maybe the winner
Why? Because there was almost no dross and the kerf width was only 0.031” & a perfect cut through with nearly non existent bevel.
Although any would be acceptable for what I do.
0.105” cold rolled
.8mm nozzle
30A
0.074” torch H Clearance
Water table
70 ipm
.8 pierce delay
Clean straight cuts
No noticeable bevel
No dross on front
Barely any heat effected area ANYWHERE
Little to none dross on the back
Cleaned off in about 3-5 minutes
Another sheet thickness test cut::
.120” cold rolled steel
.070 TH
35A
1.0 sec Pierce delay
.8 mm nozzle
Input air on RAZORCUT45 Gauge is 70psi
No dross to speak of on front or back!
Looks to me like 70 ipm was the winner with a .040” measured KERF WIDTH…
Cut quality is very good with barely any bevel!
WINNER for me was 70 ipm
Although none were all that bad.
So I still make my own, no choice but to test cut all material first and note my own settings.
That give me the best cut results
I just made a cut with my results on my post above on .120” cold rolled, and it came out perfect, just as my test cut showed at 70 ipm
So, while the cut chart is a great aid to folks like me, I’ve yet to figure out why the pierce delay is listed at 0.01, 0.02, etc. But it actually needs to be 1 second.
PD Is what ever you need it to be.
1.0 sec is way too long on 16 18 20 22 gauge
14 12 11 10 8 Etc could most likely use 1.0 or longer to get through.
If I cut on the line, I have PD @ 0
So I don’t get a round burn hole and the line in clean
Which cut chart are you referring too?
The one from RAZORWELD. (Which isn’t much use as the ipm speeds are not compatible with the crossfire)