Cut Charts

[rtsplace]

Hi Jim, I recently upgraded to a Duramax machine torch from the hand torch on my 1250 powermax. With my old hand torch I had good results but never was able to cut at the speed listed in the charts, tried it again with the machine torch same results when I used the cut charts. I'm cutting about half the recommended speed 14 ga. steel according to chart with FC consumables should be 220 ipm it won't cut thru till I slow down to around 175 and for complete cut thru on whole part I have to be below 150ipm. I've used the charts for setup using that data for perice ht. cut ht. amps but to tweak it to cut I'm at 45 amps, .100-.120 perice, cutting .080, 110 ipm with the fine cut consumables for testing and setup I've been cutting 2" squares and round discs. Just curious if you have any suggestions to speed things up ?
I used Precison Plasma gantry products, and Cand CNC Dragoncut electronics package with THC.
Thanks Ray

[jimcolt]

Ray,

I am looking at the FineCut consumables cut chart in the Powermax1250 manual right now..for 14 ga steel, here are the specs and consumable part numbers:

Deflector: 220948
Retaining cap: 220854
Nozzle: 220930
Electrode: 220842
Swirl ring: 220857

14 ga steel

Current (amperage): 45
Cut height: .060
Recommended Cut speed: 220 ipm

I have used this process on my machine a few times...and it works very well at the above settings...in fact I tried it right up to the maximum speed of 260 ipm wih no issues.....cut quality is better at 220 however.

My best guess is that you are cutting too high off the material. You say you are cutting at .08" (too high) and that will cause the torch to not fully penetrate the material. Reduce your cut height, and adjust your arc voltage so that the torch is truly at .06" throughout the cut.

Most of the materials I cut that are thicker than 18 ga.....I prefer to use the 45 amp shielded consumables. I get longer consumable life, acceptable cut quality, although the kerf is about .06" wider.

Jim Colt Hypertherm

Originally Posted by rtsplace Hi Jim, I recently upgraded to a Duramax machine torch from the hand torch on my 1250 powermax. With my old hand torch I had good results but never was able to cut at the speed listed in the charts, tried it again with the machine torch same results when I used the cut charts. I'm cutting about half the recommended speed 14 ga. steel according to chart with FC consumables should be 220 ipm it won't cut thru till I slow down to around 175 and for complete cut thru on whole part I have to be below 150ipm. I've used the charts for setup using that data for perice ht. cut ht. amps but to tweak it to cut I'm at 45 amps, .100-.120 perice, cutting .080, 110 ipm with the fine cut consumables for testing and setup I've been cutting 2" squares and round discs. Just curious if you have any suggestions to speed things up ? I used Precison Plasma gantry products, and Cand CNC Dragoncut electronics package with THC. Thanks Ray

[rtsplace]

Thanks for the reply Jim, I guess I just have to spread more tweaking the settings, When I did my first perice at .150 it blew about an 1/8" hole in the 14 ga. and when I perice at lower settings it decreased. I cut a lot of art work and had the FC setup down to .045-
.05 kerf but had never been able to cut faster than maybe 125 ipm with out the detail going down hill. One other question about the consumables between the old hand held and the machine torch are the nozzles interchangable ? I seen they are different numbers but measure out almost the same except for the I.D. or bore machine nozzle .020 larger ? Thanks Ray

[jimcolt]

The Duramax torch consumables are a completely different design as compared to the original hand torch for your 1250. Parts are not interchangeable.

I would suggest piercing a bit closer than .150 on 14 gauge....I would actually pierce it at about .100"......of most importance is the torch to work distance during the cut.....must be .060".....so tweak the arc voltage on your machine (lower voltage, lower height) until the torch is at .06".


Jim Colt

Originally Posted by rtsplace Thanks for the reply Jim, I guess I just have to spread more tweaking the settings, When I did my first perice at .150 it blew about an 1/8" hole in the 14 ga. and when I perice at lower settings it decreased. I cut a lot of art work and had the FC setup down to .045- .05 kerf but had never been able to cut faster than maybe 125 ipm with out the detail going down hill. One other question about the consumables between the old hand held and the machine torch are the nozzles interchangable ? I seen they are different numbers but measure out almost the same except for the I.D. or bore machine nozzle .020 larger ? Thanks Ray