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  #51  
Old 04-11-2017, 11:30 AM
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DozerII DozerII is offline
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Yesterday I was making some cuts in 3" x 3/8" flat and found that I was cutting 45 degree angles instead of a verticle cut, changed the tip and found it did the same. So after close inspection I found the outer copper tip with the hole in it has a cross ground into it which I believe is supposed to take care of any burr from drilling the center hole, but it looks like they are drilling the hole after grinding in the cross an on 50% of the tips it left a small burr which will direct the flow at an angle.
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  #52  
Old 04-11-2017, 06:42 PM
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Did you change the tip and the electrode? If the electrode is burned at all, the outer tip will pee around corners...

or, you've found the limits of your machine...

or, you have dirty air...

or, too much pressure...

.
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  #53  
Old 04-11-2017, 08:23 PM
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Like Doc said, You should always change the electrode and the nozzle at the same time.
Anytime a plasma cuts on an angle, the nozzle is worn out or the torch is not square to the material being cut.
The cross grooves are for air relief on a drag nozzle.
I used one of the small Lotus plasma cutters last weekend and was very impressed on the way it worked.
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  #54  
Old 04-12-2017, 03:39 AM
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DozerII DozerII is offline
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Quote:
Originally Posted by Dr Crankenstein View Post
Did you change the tip and the electrode? If the electrode is burned at all, the outer tip will pee around corners...

or, you've found the limits of your machine...

or, you have dirty air...

or, too much pressure...

.
I learned real quick you have to change the parts together, could have dirty air.

Quote:
Originally Posted by Old Iron View Post
Like Doc said, You should always change the electrode and the nozzle at the same time.
Anytime a plasma cuts on an angle, the nozzle is worn out or the torch is not square to the material being cut.
The cross grooves are for air relief on a drag nozzle.
I used one of the small Lotus plasma cutters last weekend and was very impressed on the way it worked.
I will post a picture of the burr on one of the tips.
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  #55  
Old 04-12-2017, 07:41 AM
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OK, consumables being mass produced, it's possible to miss something like a burr. The plasma arch can be deflected and cause it to cut angularly.
With moisture in the air supply, it'll eat a nozzle instantly.
If a piece of slag gets blown into the nozzle it'll do the same thing.
Too much or not enough air pressure, too fast or too slow will cause more dross.
You cannot drill a nozzle out to square the hole back up, I know
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  #56  
Old 04-12-2017, 07:03 PM
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smallfoot smallfoot is offline
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Got the chance to give mine a little workout and me a chance to get used to the new machine. Holy Cow, 1/8" steel is like butter. I wasn't doing anything that needed to be close tolerance work and I'm probably pushing my tip past it's limit, but I'm impressed. I started with my settings fairly high and have done nothing but back everything down to cut this stuff. Getting some play time on this will make a difference but I know I saved a bunch of time today on my project. I cut 4 large pieces, all the same size. The first one, I did with my grinder and a disc, the other 3 were done in less time on the plasma cutter. I'm likin it...
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  #57  
Old 04-15-2017, 02:29 PM
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Here's some pictures of the tips, it's crazy how the hole in everyone is different
one doesn't even have a hole.





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  #58  
Old 04-15-2017, 07:15 PM
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I see what you're saying
To use the badly or not punched at all nozzle, I would drill them out
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  #59  
Old 04-15-2017, 07:59 PM
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I have done that on a couple, the one on the right in the second photo will cut at a 45 deg angle with the torch level
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  #60  
Old 04-16-2017, 07:49 PM
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OK guys, Been dancing around a home made auger, making foul noises and obscene gestures for days now. Beating and cutting old tractor parts is usually taking any kind of equipment you use for a pretty good ride. So I got some more time with the plasma cutter. I'm happy to say The DR is working great. No issues at all. I am getting pretty used to it....
I cut lots of 1/8", quite a bit of 1/4" and 3/8" and lopped steel pins off that were 3/4". I'm convinced it'll cut when I need to as long as I keep up with consumables. I did find, however, that not all consumables are alike. Find ones that your gun likes and stick to them. Seems like anything else mass produced nowadays doesn't get much quality control. I think Dozer might be experiencing some of this with his consumables. Even a dirty tip and electrode is one cutting fool. I had one blow out the side.......not good for a guy with a face full of hair...Am not really sure what went on but suspect without looking, I probably put one of those tips with no hole on the gun. It was tip, electrode, swirl chamber and cone change time there.
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