Plasma cutter question

Don't see your table manufacturer listed above? Post here in this forum.
Post Reply
User avatar
elkriverfab
Posts: 491
Joined: Mon Jul 27, 2009 4:49 pm

Plasma cutter question

Post by elkriverfab » Thu Feb 17, 2011 1:03 am

I was just wondering if anyone had any experience with Hobart plasma cutters.

I was just looking around and wanting to upgrade to a machine with more cutting amps in the future.

Does anyone have any experience with the Hobart airforce 625?

I am wanting to cut heavier steel plate 1/4 and up and was just wondering.
I also will still need to dial down for thinner sheet as well.

I have been using hypertherm and have been very happy with that brand but like I said, just wondering if anybody out there has had any experience with the Hobart brand.

Any help would be great.

Thanks.
Last edited by elkriverfab on Thu Feb 17, 2011 10:49 pm, edited 1 time in total.
"OK, Now hold my beer and I'll try it"

eggauto
Elite Contributing Member
Elite Contributing Member
Posts: 182
Joined: Sun Jul 18, 2010 7:59 pm

Re: Plasma cuter question

Post by eggauto » Thu Feb 17, 2011 7:20 am

I built my table on a very limited budget around a Hobart 250ci (Insert laughter here) but had lost mt job to south of the boarder and with barely any income and the 250 in my shop I gave it a try. To my amazement it has cut about 30 sheets so far ranging from 18 gauge to 3/16 and hasn't missed a beat. It took a few modifications to get it to work with a table but hey it does what I need.

Mountain Home
Elite Contributing Member
Elite Contributing Member
Posts: 247
Joined: Tue Nov 17, 2009 10:39 pm
Location: AR, USA

Re: Plasma cuter question

Post by Mountain Home » Thu Feb 17, 2011 7:25 am

I don?t use a Hobart, I use a Miller but from what I can see they are about the same. I have got good cuts when I get everything set right, the thing I don?t like about the Miller is the lack of choices for consumables and the poor excuse for a owner?s manual . If you go to the Hobart website and download the manual for that machine you will see what I mean, they have one little graph to show to show recommended cut speeds, not much there to help with settings. I wish I had gone Hypertherm and will Be replacing my Miller very soon.

muzza
Posts: 1474
Joined: Wed Feb 04, 2009 5:35 pm

Re: Plasma cutter question

Post by muzza » Sat Feb 19, 2011 7:57 pm

My response is probably pretty irrelevant as I'm on the other side of the world and it was some time back. Quite a few years ago I had a Hobart welder, back up service was almost non existent but that may have been more the fault of the local service agent rather than the brand.

I'll be purchasing a new plasma in the very near future and there is only one brand I'll be purchasing. That decision is based on so many positive referrals but more importantly the pre and post purchase support offered by one of their totally dedicated staff who frequents every related forum I visit always offering assistance almost instantaneously. Thanks to Jim Colt, regardless where I purchase my unit downunder, you can be credited with the sale.

An old saying "It is better to have paid a bit more and lost a little than to pay too little and lost a lot" not that they are any more expensive than other leading brands.

Murray

User avatar
elkriverfab
Posts: 491
Joined: Mon Jul 27, 2009 4:49 pm

Re: Plasma cutter question

Post by elkriverfab » Mon Feb 21, 2011 2:45 pm

Murray,

I too agree with you.

My hypertherm has been great.
I was just wondering if anyone had any luck with the hobart unit.

I guess you should not stray from what works :D
"OK, Now hold my beer and I'll try it"

jimcolt
Elite Contributing Member
Elite Contributing Member
Posts: 3042
Joined: Mon Jul 20, 2009 11:18 pm
Location: New Hampshire

Re: Plasma cutter question

Post by jimcolt » Tue Feb 22, 2011 9:06 am

I have tested the 3 current Hobart systems. They are:

1. The 250 ci. This unit has 12 amps output, yet has an internal compressor for truly portable use. It is rated to cut 1/8" maximum materials thickness at 35% duty cycle. I was able to sever some 1/4" (very slowly). Hobart is not using an italian torch from Trafimet as a cost saving measure (They used to use Hypertherm torches). This unit operates on 120 VAC.

2. The 500i. This unit will operate on either 120 VAC (25 amps) or 230 VAC. It has 27 amps maximum output, and is rated for 3/8" severance cutting. I was able to barely sever a piece of 1/2"....although I ruined the torch nozzle(tip) in the process as it is of a non shielded design. Does a decent, but slow job on 1/4" and thinner, although it is difficult to hold a proper standoff with the torch. Non shielded Trafimet torch.

3. The 700i. This unit produces 40 amps at 50% duty cycle. Rated for 1/2", yet will sever 3/4" maximum....very slowly. The torch is non shielded, and with contact to the plate serious sticking (double arcing) occurs......short nozzle (tip life) was observed with the Trafimet torch.

They are all priced lower than comparably powered Hypertherm and Thermal Dynamics systems, however with the torch design (same torch that is used on many of the Chinese import plasma systems) expect higher overall operating costs due to slower cut speeds and more frequent consumable parts changes. I also could not find any sign of machine torch availability...just hand torches.....and no torch quick disconnect as found on the Hypertherm and T-D units.

That is my unbiased report!

Jim

VoltageDrop
Posts: 1
Joined: Tue Oct 05, 2021 1:09 pm

Re: Plasma cuter question

Post by VoltageDrop » Wed Nov 03, 2021 5:14 pm

eggauto wrote:
Thu Feb 17, 2011 7:20 am
I built my table on a very limited budget around a Hobart 250ci (Insert laughter here) but had lost mt job to south of the boarder and with barely any income and the 250 in my shop I gave it a try. To my amazement it has cut about 30 sheets so far ranging from 18 gauge to 3/16 and hasn't missed a beat. It took a few modifications to get it to work with a table but hey it does what I need.
I realize this post is 10 years old but I'm curious if this machine is still working out for you? I have an old Hobart AirForce 625i that I'd like to build a CNC table for but I'm curious if it's worth using or if I should plan to sell it and get a HT or TD cutter. What did you have to tap into inside the plasma to get it working? (ArcOK, etc?) I also haven't found anything specifying whether it's HF start so does anybody know if it is? It has pilot arc but I've read that's not conclusive. Thanks in advance for any advice! :Like

adbuch
Elite Contributing Member
Elite Contributing Member
Posts: 2808
Joined: Thu Sep 21, 2017 5:22 pm
Location: Tucson, Arizona
Contact:

Re: Plasma cuter question

Post by adbuch » Wed Nov 03, 2021 9:12 pm

VoltageDrop wrote:
Wed Nov 03, 2021 5:14 pm
eggauto wrote:
Thu Feb 17, 2011 7:20 am
I built my table on a very limited budget around a Hobart 250ci (Insert laughter here) but had lost mt job to south of the boarder and with barely any income and the 250 in my shop I gave it a try. To my amazement it has cut about 30 sheets so far ranging from 18 gauge to 3/16 and hasn't missed a beat. It took a few modifications to get it to work with a table but hey it does what I need.
I realize this post is 10 years old but I'm curious if this machine is still working out for you? I have an old Hobart AirForce 625i that I'd like to build a CNC table for but I'm curious if it's worth using or if I should plan to sell it and get a HT or TD cutter. What did you have to tap into inside the plasma to get it working? (ArcOK, etc?) I also haven't found anything specifying whether it's HF start so does anybody know if it is? It has pilot arc but I've read that's not conclusive. Thanks in advance for any advice! :Like
He hasn't been active on this forum for about 2 years now. I don't know anything about the Hobert 625I, but if it has a "soft start" then I think it should work. You would need to tap into the arc voltage connections on the main board plus splice into the torch trigger wire so that you can control the torch on/off function.

adbuch
Elite Contributing Member
Elite Contributing Member
Posts: 2808
Joined: Thu Sep 21, 2017 5:22 pm
Location: Tucson, Arizona
Contact:

Re: Plasma cutter question

Post by adbuch » Wed Nov 03, 2021 9:17 pm

The Hobart AirForce 625 is wired the same way as the Miller Spectrum 625. See the attached photos below for details on splicing into the trigger wire and connecting the work clamp terminal and electrode terminal wires for monitoring the arc voltage.
David

Hobart 625.jpg
Miller Spectrum 625 - 2.jpg
Miller Spectrum 625 - 1.jpg
Miller Spectrum 625 - 3.jpg
Miller Spectrum 625 - 4.jpg

You do not have access to view or download this file.
Become a Contributing Member to gain access to this feature. Click Here


Post Reply

Return to “Various Manufacturers”

Industry Pros use FastCut CNC