Fine Tuning with my Everlast 62 and Crossfire Pro

Software Fusion 360 - CAD
21

Yes, if you were using 40 amp then you would use a 0.9mm/40 amp/.035" orifice cutting tip. You can use a 1.0mm/ 50 amp/.040" orifice at 40 amps but the kerf would be a little wider.

Most cutting tips work best at a 10 amp spread.

20 amp tip - 0.6mm/.025" - 15 to 20 amps - 50 to 55 psi

30 amp tip - 0.8mm/.030" - 21 to 30 amps - 55 to 60 psi

40 amp tip - 0.9mm/.035" - 31 to 40 amps - 65 to 70 psi

50 amp tip - 1.0mm/.040" - 41 to 50 amps - 65 to 75 psi

60 amp tip - 1.1mm/.044" - 51 to 60 amps - 65 to 75 psi

70 amp tip - 1.2mm/.047" - 61 to 70 amps - 75 to 80 psi

80 amp tip - 1.3mm/.051" - 71 to 80 amps - 75 to 80 psi

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22

In that case (pun intended) I would up my amps to 50, 75psi flow, cut speed some and adjust my cut line to compensate for the wider kerf.

4 Likes
23

I might need to make an order through you for lower amp consumables. Ipt-60 cnc torch.

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24

Thank you for this table George. I pasted it into my cut chart. Now I have to adjust all my kerfs. lol

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25

Doing some more test cuts after switching over to the 1.0mm tips. Cutting that test card on fireshare, the largest cut width (kerf?) I can measure on straight lines is about 0.063", a 1.000" circle is 0.982" (counter clockwise, left comp).

Everlast 62i, CNC torch, .120" mild steel, 80 ipm, 45 amps, 75 psi air (cold and dry). Cuts are clean with some “splash” on the pierce holes.

Maybe I’m being too finicky?

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26

The kerf will vary so you will need to test to get the actual kerf… but it will be approximately .01" larger than the orifice diameter listed in the table above.

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27

You should be using a lead in on everything except the single line cuts.

Those divots on the square and the circles wouldn’t be there if you started on the waste material in the center of the shape.

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28

I was impatient and didn’t want to set up 2 profiles to do lead ins on some and not others. On non-test article cuts where it matters, sure.

Oh, and the circles absolutely refused to cut with any kind of lead in.