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)
I finally found the link (Razorweld Cut Chart), but honestly, the chart was not easy to use, and I didn’t want to risk wasting a $100 steel sheet trying to figure it out. I ended up using the cut chart provided by Razorweld and posted by MO-Hacker, specifically for this cutter. (Razorcut 45 cut chart) Our max ipm is 300, but I cut mostly 10ga Mild Steel anyway. By using Razorweld’s chart for “optimum travel speed” (0.50pd)(98ipm), I get perfect cuts every time. Which is awesome, because the basic settings provided by Langmuire’s tutorial videos made terrible cuts, and half the time didn’t even pierce.
Edit: I’m actually having some trouble with my pierce delay today, but other than that, everything is perfect using Razorweld’s chart.
That’s the one you should rely on. The other one was created back when Razorweld didn’t have a chart of their own. We had to test to figure out the settings that worked and posted our experiences on it. Hypertherm always had a good chart but RW didn’t so we made do the best we could
Where do I find this spreadsheet you’re talking about? I’m teaching high school kids how to run this and really don’t want to have to test it all for myself.