Need help with restart failed run

These are actually due for swapping out. I just finished a bunch of projects and will be repurposing this torch for hand use. I’ve got a Hypertherm machine torch I’m putting on the machine but that’s a this weekend project :slightly_smiling_face:

That is what I really want to do as well - is put a machine torch on. But , first I have to spring for a new compressor. I really didn’t plan on using the little jobsite nailer I had been using for this. But I had expected it to keep up for smaller stuff… It can with the smaller nozzles. but I feel, in the long term it will put too much load on its duty cycle - I had hoped to keep it for a few months before having to upgrade. But seems, I am going to move to something sooner.

In my opinion that is not nearly enough air. You are frying your electrode, that could be why it is misfiring as it is actually welding itself together inside the tip. My Razorweld 45 need 75 lbs while cutting. I have to have a 6.7 CFM @75 lbs. I have my pressure gauge on the compressor at 100, I have the pressure gauge in the cutter at 82. That way when it starts the cut it goes back to the 75 lbs I need to keep everything cool enough, and cut properly.

That is precisely why I avoided the razorweld - it has the highest cfm consumption of any cutter - I looked at by far. I am not frying my electrode. and its not close to welding itself inside the tip - I just upped the pressure with a new compressor - it actually cut much worse - all I have now is melted metal all over the details of my work. more pressure is not better - that is for sure. I still get a drop of pressure when the cutter turns on, and recovers instantly when cutter is off - yet I am full 150psi at the tank with plenty of throw… Maybe - the dryer and filter… will remove them and see if I get the dip.

I have resolved this air consumption issue. The dryer , though capable of higher pressure - is choking things down. I have minimized the issue by having 30 psi above desired pressure in the line before dryer. it still throttles it down when the torch is running but its only about 7-10 psi… I believe this is slightly normal with the release of active pressure with use pneumatic tools. in other words when some air the line is consuming its essentially a leak… and therefore will never meet static pressures. You would have to have 80psi static psi - to maintain a 70psi active psi… Can anyone confirm this with their rig?

Yes a 5 to 10 psi drop from static to flow/working psi is normal. More then that and I would start looking for a restriction .

yeah that is what the cheap HF dryer was doing. Uping the pressure infront of it by an additional 30 psi more than I want out of it. has me within those tolerance.

Maybe put an auxiliary tank in after your dryer. Volume may be your issue. Just a thought

That tank would have to be huge - to keep up with a 5 cfm per minute usage… if you were to let your dryer choke down,

@nordicack did you get this issue resolved with your PrimeWeld Cut 60? I just bought one and am ready to give it a try.
I had a Razorweld 30i and gave up on it. With the 30i I ran 100 PSI at the compressor, 75 PSI at the cutter. Really curious what you found to be the best combination for the CUT 60?
I normally cut 1/8" aluminum or steel

yeah , the problem is the dryer is causing too much friction and resistance. if i have 60 going in it will put 60 going out… but 60 going in at 4cfm per minute puts out more like 25 at 4cfm . all I had to do to fix it is put 90 -100 in before the dryer and the dryer can put out 60psi at the needed 4cfm …

You need between 90 and 120 psi going to the back of the plasma cutter.

Have not used it yet but I installed a inline desiccant air dryer on the back of the plasma unit see photo but ignore the groovy carpet it’s in my den I’m not remodeled that room yet LOL.
I also have a inline desiccant air dryer up by my air compressor.

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Those work great… for about 5 minutes :frowning:

Depends on your environment. I have a similar one on the back of my cutters. They work fine. I get a few days of cutting in the CT climate before I swap the dessicant out (I bake the pink stuff to dry it out & “recharge” it). I also have a couple of quarts of it so I can replace it if I haven’t had a chance to bake the old stuff.

I use them on torches, bead blasting gun, powder coating gun, etc. By putting them right next to the device I don’t have to worry about friction pressure losses in a pipe based water removal system or anything that might condense out in the air hose.

I bought one of those dessicant filters like that at Lowes and right out of the package it wouldn’t pass enough air to run the plasma cutter.

This is the one I use on all my machines.

https://www.amazon.com/gp/product/B07BR6W6D4/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Really understand your environment and the effect humidity has on the plasma process when choosing one of these dryers. I’m jealous that @jamesdhatch can run these little tiny desiccant dryers. I live in Phoenix which isn’t Tampa or anything when it comes to humidity, but we have plenty of moisture in the air. That first in line dryer that holes 1-2 oz of desiccant literally only lasts me 2-3 cuts and it’s completely pink. I wasn’t exaggerating when I said 5 minutes of use. The other dryer James linked holds 5 oz and would last me less than a week. I purchased one that holds 32oz and it’s fantastic. It’ll last a month downstream from my refrigerated dryer. I have another filter with a glass bowl after this as a fail safe so the desiccant material doesn’t end up in my plasma cutter and torch and there is never even a small sign of fog on the glass. 100% dry air. I would rather have one that holds 2-3 quarts so I wouldn’t have to change it but a couple times a year but the price shoots up to $250-600 for the big ones.

https://www.amazon.com/gp/product/B00HY4Q1U8/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1

Wow. That sucks. I have a couple of gallons of dessicant so it’s easy enough to refill a pink saturated one with fresh beads. I collect up the pink ones and bake them once a month or so. It’s not too much extra work. I’ll use the powder oven to do a bunch when it’s cooling from a coating job. (My wife doesn’t like trays of beads in her oven :slightly_smiling_face:)

We get it, the little ones work well for you.

It was a warning to people living in high humidity areas.