liam.mccaffrey
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| posted on 24/11/09 at 07:57 PM |
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Plasma Cutter Problem
Plugged in the plasma tonight for the first time. Plumbed in the air, plugged her in, turned her on, lots of sparks, lots of whoosh but no
cutting??
I was trying to cut some 16g sheet, it was marking the surface and did blow a small hole but I had to hold it in the same place for around 8-10
seconds.
Enough air pressure??
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Alan B
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| posted on 24/11/09 at 08:06 PM |
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Was the ground (earth) connected OK?
That can make a big difference.
Alan
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JoelP
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| posted on 24/11/09 at 08:07 PM |
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unplug the plasma and check the flow of air when you pull the trigger. Should be a good gust. Dont think that will be the problem though, id expect a
warning light if there wasnt enough air.
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big_wasa
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| posted on 24/11/09 at 08:10 PM |
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Have you checked the polarity ?
Ie work piece pos torch neg on mine.
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Peteff
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| posted on 24/11/09 at 08:12 PM |
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Try cutting from the edge of the sheet, if you hold it down on the flat it might be gobbing your nozzle.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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liam.mccaffrey
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| posted on 24/11/09 at 08:28 PM |
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It doesn't flow when the unit is switched off it must have a electrical control valve. When it on though you can feel the jet reaction when you
press the button.
I'm pretty sure the ground was good its a brand new good quality clamp and it was right next to the attempted cut on clean metal. I will check
again tomorrow though.
Could the polarity be wrong???? There is only one way to hook up the cables.
[Edited on 24/11/09 by liam.mccaffrey]
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rusty nuts
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| posted on 24/11/09 at 08:32 PM |
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Has it got a built in regulator for the air pressure ? Is it set correctly? Have you got a decent air supply? Is the nozzle in good condition? Have
you got any instructions? If so have you read them? As you ask enough air pressure ? Their good when they work
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StrikerChris
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| posted on 24/11/09 at 08:48 PM |
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in fear of sucking eggs and old dogs jumping to mind,if its a scratch torch were you holding it to the job,not hovering above as you would with a
burning torch?
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liam.mccaffrey
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| posted on 24/11/09 at 08:58 PM |
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its a hf start and i tried both  I will check all the connections and the air supply pressure tomorrow
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mad4x4
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| posted on 24/11/09 at 09:21 PM |
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The tip inside the torch is shot unscrew the ceramic bit and then you will see a bit like
----||---- if it looks like ----||- then it is knackerd
Scot's do it better in Kilts.
MK INDY's Don't Self Centre Regardless of MK Setting !
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liam.mccaffrey
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| posted on 24/11/09 at 11:20 PM |
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ill check but its a brand new tip, torch and machine
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baz-R
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| posted on 27/11/09 at 12:44 AM |
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could be that the inner eletrode in the torch is sticking
most of the smaller or older sets have a type where it is lifted off a seat by air pressure starting up striking your start arc.
take off your nozzle and try to push it in/out
a small bit of dust/grit make them stick
to much air maybe or a shot nozle,eletrode if not
if your set has mesh cut its hf and is not like this
trust me i used to sell plasmas tigs and welding supplys 
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aitch
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| posted on 7/12/09 at 11:33 PM |
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sounds like dodgy ground to me
i.e. to the work piece
sounds exactly like what i get when i forget to conect the ground clip
but its brand new just take it back and ask them to check it out
aitch
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boggle
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| posted on 10/12/09 at 03:09 PM |
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sounds like not enough air....if you havnt got a bolt of plasma then the current isnt super heating the air...my plasma set says to run at 4.4bar, but
i find it wont cut at that and i have to run at 6bar....also you may have a purge button on there, press that before firing it....
just because you are a character, doesnt mean you have character....
for all your bespoke parts, ali welding, waterjet, laser, folding, turning, milling, composite work, spraying, anodising and cad drawing....
u2u me for details
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