Welding Fume Extractor

Share and learn with other DIY members who have built their own plasma tables and accessories.
Post Reply
msimpson99
Posts: 183
Joined: Wed May 04, 2016 2:31 pm
Contact:

Welding Fume Extractor

Post by msimpson99 » Fri Aug 16, 2019 6:05 pm

I own several welders, MIG, TIG, Stick, and flux core.

I needed to do some down and dirty flux core welds for a project I am working on, but it was raining, so I couldn't do them outside.

My CNCCS plasma built is 100% downdraft venting outside so I through this together:
_MG_5939.jpg
Its simply a 12" x 12" piece of 16 Gauge steel sitting on the slats on the front of my machine.
It works very well, I get no fumes or smoke in my shop at all when the downdraft is turned on. Not that the downdraft is too much for any kind of TIG or even MIG welding unless I close the damper on the downdraft.

For larger welding projects, I will be making a insert that sits on the table and tuns a duct to my welding table for a more traditional fume extractor.

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


Mtw fdu
Posts: 232
Joined: Sat Dec 20, 2014 3:12 am
Location: Barossa Valley, South Australia

Re: Welding Fume Extractor

Post by Mtw fdu » Tue Aug 20, 2019 6:45 pm

Not trying to be picky, but it looks as though the weld has not connected to the bottom plate properly. The bead should flow easier than that.

Mtw fdu.
Camcutcnc 2 x 2 plasma cutter with UC 100 Motion Controller
Powermax 45 with Machine Torch
Bobcad V27 and Mach 3
Proma THC
Now with Rotary Axis

msimpson99
Posts: 183
Joined: Wed May 04, 2016 2:31 pm
Contact:

Re: Welding Fume Extractor

Post by msimpson99 » Tue Aug 20, 2019 10:44 pm

Maybe if I was doing MIG it might seem to flow better, but with flux core these little welds work perfect to weld the nut to the washer. I do three welds, and they are not going anywhere. The welder is a little titanium 125 flux core and I love it. Once I clean them up with a wire brush they powder coat great. I will say that this is one of my first welds with this welder. And after working on the whole chess set I have the welds dialed in perfectly for this project.

IE this is a chess set not a receiver hitch. My problem on the early ones was that it was too hot and would oftain tear up the washer. I now do the weld at a much lower voltage and wire speed.

The idea with the post was not on the quality of the welds but on the down draft table taking care of the awful smoke and dangerous fumes. Not a bit of smell or smoke in the shop. Believe me I have had welding fever doing extensive welding of zinc hardware, its not fun.

Mtw fdu
Posts: 232
Joined: Sat Dec 20, 2014 3:12 am
Location: Barossa Valley, South Australia

Re: Welding Fume Extractor

Post by Mtw fdu » Tue Aug 20, 2019 11:41 pm

I too have had a lot of experience welding zinc (we call it galvanised steel here down under) probably 20 years plus. There are tricks of the trade when welding it.

I could not see the washer you were trying to weld.

Mtw fdu.
Camcutcnc 2 x 2 plasma cutter with UC 100 Motion Controller
Powermax 45 with Machine Torch
Bobcad V27 and Mach 3
Proma THC
Now with Rotary Axis

msimpson99
Posts: 183
Joined: Wed May 04, 2016 2:31 pm
Contact:

Re: Welding Fume Extractor

Post by msimpson99 » Wed Aug 21, 2019 12:16 am

What are some of the tricks of the trade, how bout sharing some.

I have an Everlast PowerTIG 255EXT and just love it. I taught myself how to TIG weld using that welder. But its not very forgiving, and doing Zinc stuff, forget about it.

I also have an Everlast Power MTS 251Si, MIG, TIG and Stick. I love this welder as well, but its a beast.

I purchased the Titanium to show the beginners, you can use one of these welders to complete a great many projects. It is a far cry from the original HF flux welder. For one you have pretty good control over the voltage and wire speed.Aside from the smoke that flux core wire creates, I have been getting some really nice welds from it. It works very well on the Zinc stuff and with the downdraft, I have been able to get away with not using a respirator.

One funny thing, is I find myself holding the torch over the weld after I am finished so that the post flow will keep the weld from oxidizing. I know this is crazy with flux core, but this habit is hard to break, and does not really hurt anything.

User avatar
Ironken
Elite Contributing Member
Elite Contributing Member
Posts: 260
Joined: Thu Nov 30, 2017 7:29 pm

Re: Welding Fume Extractor

Post by Ironken » Wed Aug 21, 2019 1:36 am

I am not an erechicken but my concern with welding on a cnc especially with GTAW is that the HF start could damage the electronics of the cnc. Otherwise, a good idea if you have a down draft table.

If you have a gas valve equipped power source, you may try GMAW, much better than FCAW on small stuff like that but not as tolerant of galvanized material. I always grind galvanized before smokin' it personally.

For reeely heavy galvanized material that packs up your grinding wheels, I have used 6022 to burn a root in, wire wheel and follow up with 7018 or 7024 depending on the joint.
JD2 MAD 4X4
Millermatic 252 (spray)
Millermatic 190 (short circuit)
Syncrowave 210
Powermax 65
Powermax 45xp
Grizzly Vertical Mill (junk)
Baileigh BS-210M
50t Press
Shitloads of DeWalt

msimpson99
Posts: 183
Joined: Wed May 04, 2016 2:31 pm
Contact:

Re: Welding Fume Extractor

Post by msimpson99 » Wed Aug 21, 2019 10:57 am

If doing TIG, the HF start would indeed mess with the electronics. While I have never damaged anything, I have caused a PC or two to reset.
When I am using the downdraft like this. The CNC is off. The downdraft is controlled separately, so I can do things just like this. I have used the downdraft for hand plasma cutting, grinding, and painting.

My ultimate goal is to just make a light weight cover that sits on part of the table. I could then run a couple 6" or 8" flexible hoses out and over a small welding table.

msimpson99
Posts: 183
Joined: Wed May 04, 2016 2:31 pm
Contact:

Re: Welding Fume Extractor

Post by msimpson99 » Wed Aug 21, 2019 11:10 am

Here is a pic of the chess set I am working on.
_MG_5947.jpg
I still have a few pieces to make, and will probably write it up as a project on the website. Makes a great beginner project.

Note, you can see where I blew out some of the washers on the pawns.

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


msimpson99
Posts: 183
Joined: Wed May 04, 2016 2:31 pm
Contact:

Re: Welding Fume Extractor

Post by msimpson99 » Fri Sep 06, 2019 10:13 pm

After two iterations, I have a finally completed the nuts and bolt chess pieces write-up.
See them here:
https://www.kronosrobotics.com/nutbolt-chess-pieces

ctgolfer1
Posts: 26
Joined: Thu May 30, 2019 4:35 pm

Re: Welding Fume Extractor

Post by ctgolfer1 » Sat Sep 07, 2019 8:12 am

That is pretty cool. I like your well-done wright up.
Now if you would make a chess board , that would be cool.
Plasma cut a board out of 1/4" plate, just cutting every other square and cut some 1/4" stainless squares, tack it on a backer 10 ga sheet.
Maybe intentionally leave a 3/16" kerf and fill it with silver solder or brazing rod, sand the whole thing down and hit it with steel FX.

Sounds easy.....
Nice job!

msimpson99
Posts: 183
Joined: Wed May 04, 2016 2:31 pm
Contact:

Re: Welding Fume Extractor

Post by msimpson99 » Sat Sep 07, 2019 1:45 pm

Yep, a metal chess board would be neat. It will be very heavy so it would need to be mounted on some sort of stand.

The nuts and bolt pieces would be a good project for a beginner with a flux core welder.
I do plan on some chess pieces welded up from some plasma cut parts. I can see some different designs here.

I would also like to experiment with some different patinas, but dont know where to even start with that.

DXF
Elite Contributing Member
Elite Contributing Member
Posts: 1581
Joined: Tue Feb 22, 2011 5:15 pm
Location: Mountain City, Tennessee

Re: Welding Fume Extractor

Post by DXF » Sat Sep 07, 2019 6:05 pm

Why not use a high temp loctite that will withstand the temp of powder coating? No welds needed.

Dave Hanks

msimpson99
Posts: 183
Joined: Wed May 04, 2016 2:31 pm
Contact:

Re: Welding Fume Extractor

Post by msimpson99 » Sat Sep 07, 2019 9:55 pm

The welding is for a base. One 3/8" nut welded to a 3/8" washer. The washer is the bottom of the piece. Locktight wont work of this.

That said, they could be brazed or even epoxied. It is only the base that is welded. all the other parts are just screwed into place and tightened.

Post Reply

Return to “DIY Plasma Table & Accessory Discussion Forum”

Easyscriber engrave attachment for Hypertherm plasma cutters.