Plasma Cutter

bronc71

Member

Equipment
BX25D
Feb 25, 2021
54
33
18
North Idaho
10 years ago I bought a Hobart 12ci. I used it maybe a dozen times, and kept it stored on a shelf in my shop so it still looks like I just pulled it out of the box. I put it to good use the past few weeks working on things like making the Equal angle hitch for the mower, and a few other projects.

Last weekend I was cutting off the axle brackets on a cart with it and it quit working. Last Friday I opened up the case and found the reason is due to a burned circuit board. I contacted Hobart support and found out a replacement board cost $2,308. This unit cost me $740 brand new off the shelf and I can replace it for $650 with a newer model.

Reason for this post is not to complain, but to find out what others have for plasma cutter? Other brands, and how they held up.
I had a very similar problem on my Miller plasma cutter. Circuit board would cost about a thousand bucks. I contacted Miller to get some deeper troubleshooting information. Turned out to be a 5 dollar transistor with 20 bucks shipping On internet. I tried it and fixed it. It pulled away from a heat sink and cooked. Might be worth calling Hobart to get more technical troubleshooting information? I was very lucky.
 

ACDII

Well-known member

Equipment
B2410, L352 Loader, Woods BH70-X backhoe
Oct 21, 2021
581
357
63
Illinois
I had a very similar problem on my Miller plasma cutter. Circuit board would cost about a thousand bucks. I contacted Miller to get some deeper troubleshooting information. Turned out to be a 5 dollar transistor with 20 bucks shipping On internet. I tried it and fixed it. It pulled away from a heat sink and cooked. Might be worth calling Hobart to get more technical troubleshooting information? I was very lucky.
Board is fried, being multi layer, its can't be bread boarded either. There is literally a gouge in the board between three transistors.
 

GeoHorn

Well-known member
Lifetime Member

Equipment
M4700DT, LA1002FEL, Ferguson5-8B Compactor-Roller, 10KDumpTrailer, RTV-X900
May 18, 2018
3,560
1,388
113
Texas
I bought a Forney 20P from TSC for less than $500, but Amazon will beat even that price at $450 with free shipping:
I have worked it VERY hard cutting almost 3,000 feet of 14 ga steel and it also cuts right thru 1/4” steel like it was butter. Expendables are easy to find, inexpensive, and also available online. Anyone who’s been welding/cutting metal vey long will know the name Forney:

https://www.amazon.com/Ferny-Easy-Weld-251-Plasma/dp/B078TZ9WMM/ref=asc_df_B078TZ9WMM/?tag=hyprod-20&linkCode=df0&hvadid=312096335436&hvpos=&hvnetw=g&hvrand=14865501243173873900&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1026201&hvtargid=pla-569011383329&th=1
 
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