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finecut on .063 aluminum powermax 85 jd2table

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finecut on .063 aluminum powermax 85 jd2table

Postby metalassassin » Mon Sep 17, 2018 12:13 am

been trying all day to get finecut consumables to work with jd2 table. i have hypertherm powermax 85 and there is no chart for finecut consumables on aluminum so i had read on here to start with steel values and tweak from there. my problem is the lines where not good somewhat wavy my guesss is the panel heats up and warps up and the torch height controller is trying to react but not fast enough i assume.when i switch out to regular 45amp consumables and run at book specs i get decent lines but not great. what am i doing wrong and what kind of edge quality should i expect from .063 aluminum. then in the facebook group for jd2 a guy said that i can't use fine cut on aluminum so am i wasting my time?

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Re: finecut on .063 aluminum powermax 85 jd2table

Postby john527 » Mon Sep 17, 2018 6:48 am

I am having the same problem with my plasmacam/hypertherm45 XP why isn't there a specs for fine cut and alum?

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Re: finecut on .063 aluminum powermax 85 jd2table

Postby Charlie10 » Mon Sep 17, 2018 9:21 am

I cut .06 aluminum with fine cut on my 45xp fairly often, so I certainly wouldn't say you are wasting your time. I don't know why there aren't specs for it, but I did the same thing you did. I started with the specs for 16ga steel fine cut and tweaked from there. From my experience the cut quality with aluminum is never going to be great, but it should definitely be better than what you have. The biggest pain with thin gauge aluminum is how easily it bows and shifts from the heat. It can cause inaccurate parts or torch collisions and I generally have a much higher scrap rate with it than steel, but it shouldn't cause wavy cuts like that.
I wish I could help more other than to just say it's possible, but I'm not sure. I would say try cutting with less amps, I cut at 45, but sounds like you tried that?

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Re: finecut on .063 aluminum powermax 85 jd2table

Postby tcaudle » Mon Sep 17, 2018 11:34 am

Usually when Hypertherm does not provide a chart for a machine that has charts for other consumables its because its not recommended . You have picked two challenging things a the same time. Fine cut is always harder to do because there are closer tolerances as to cut height and voltage and feedrates. Aluminum also presents a challenge as does cutting fine detail in thin material.

We cut tons of thin aluminum (060 to .12) and plasma is not the method we use.

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Re: finecut on .063 aluminum powermax 85 jd2table

Postby motoguy » Mon Sep 17, 2018 1:59 pm

Per Jim Colt, there are no cut charts for Finecut in AL because it is not a recommended process. Per Jim, the using Finecuts on AL will result in significantly shortened nozzle life. Due to the significantly decreased nozzle life, they do not recommend it, and recommend using the standard 45A consumables instead.

Doesn't mean it can't be done, and that others aren'd doing it. Just means you'll need 1) to figure out the specs yourself (easy enough to do with a straight light cut), and 2) expect to wear out your nozzles faster.
Bulltear 6x12 w/ Proton Z axis & watertable
CommandCNC/Linux w/ Ohmic & HyT options
Hypertherm Powermax 85 w/ machine torch
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