25A with a PM85A

[Geanvert]

hello everyone, I just saw that my PM85 is capable of going down to 25A, what can we do with this power knowing that there is no nozzle below 45A for this model? THANKS

[djreiswig]

You can cut at lower amps with a 45a nozzle. Works good on thin material.

[weldguy]

What material thickness are you cutting?

[Geanvert]

I intended to cut 1mm for decorative logos.

[weldguy]

For that thickness I would use a Finecut nozzle and do some test cuts at say 45, 35, and 25 amps at the correct cutting height and appropriate speed see what is producing the best results. The biggest advantage I could see using lower amps is it would allow you to cut at a slower speed which is good for machines that get sloppy and/or don't like higher cut speeds. If your machine can handle the speed it needs to cut at 45 amps it should produce great results without turning the amps down.

[Geanvert]

excuse me, I hadn't seen the message. so I'll try that soon. thank you

[adbuch]

Geanvert - Here are the Hypertherm mechanized cut charts for the FineCut consumables. The benefits of the FineCuts for detailed parts using thinner material include better cut details and less heat into the material and thus less warping - assuming you are cutting at the normal speeds and not the slow speed. For new FineCut consumables - it is recommend to set your cut height at 0.070" to 0.075" for the first several hundred pierces, and then drop back to the standard 0.060" cut height. (you can convert these to mm).

David

[weldguy]

excuse me, I hadn't seen the message. so I'll try that soon. thank you

No problem, good luck and let us know how it works out for you.

[Geanvert]

hello, I'm coming back to give you information now because I only did the tests yesterday.
I tried the unprotected fine cut at 30A only and not far on 1.5mm thick sheet metal. The result is very good, next time I will do it at 25A which corresponds to the minimum on my powermax 85.
Thanks again to everyone who provided help, I really appreciate this forum.

[adbuch]

Thanks for the update on your progress. Please do keep us posted as you continue fine tuning your process.
David

[weldguy]

Glad to hear the lower amp setting is working out for you. I have had very good luck in the past using lower amps and slower speeds on tables with heavy gantries that did not like changing direction quickly and made a big improvement on the cut and edge quality.