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OKType3Tim Samba Member
Joined: April 30, 2011 Posts: 279 Location: Northeast Oklahoma
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Posted: Mon Feb 06, 2017 9:49 am Post subject: Re: Harbor Freight 90 Amp Welder |
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theKbStockpiler wrote: |
MIG welding uses a fraction of what the TIG welding process uses. An 80cfm TIG tank is equivalent to a 22cfm MIG tank. |
Agreed _________________ '69 Squareback restoration
'69 Fastback restoration
'66 Type34 |
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67ctbug Samba Member
Joined: January 24, 2016 Posts: 3619 Location: CT
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Posted: Fri Apr 14, 2017 12:27 pm Post subject: Re: Harbor Freight 90 Amp Welder |
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Been using the new mig for a while and I am having some trouble. I can't find the right setting, the chart is bad IMHO and it burns through everything. I'm welding replacement panels in today or tomorow and am welding OG steel right now and I don't want to keep having to make huge piles of weld to fill holes. Does anyone else have this welder? What settings are you running. Ive seen some beautiful welds come from this machine in pictures so I know it's possible. _________________ '67 Beetle L41
'74 Westfalia
'69 Plymouth "Adam-12"
'63 Ragtop
'73 914
'73 Dodge W200
'72 Dodge Wrecker
Go Cubs!
World Series Champions 2016
KentPS wrote: |
...or the PO envied the terrorists' bus in "Back to the Future". |
mukluk wrote: |
He's fine, just waiting for the dragon in winklepickers to move out of his lane. |
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theKbStockpiler Samba Member
Joined: July 07, 2012 Posts: 2316 Location: Rust Belt
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Posted: Fri Apr 14, 2017 1:42 pm Post subject: Re: Harbor Freight 90 Amp Welder |
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I would put the voltage on 1/3rd of it's dial to start. What gauge and type of joint ,etcetera are you going to do ,.025 wire with gas? _________________ My beetle is not competing with your beetle. I have the yellow beetle in my town. There is a red one, a green one ......
Use all safety devices including a mask. |
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67ctbug Samba Member
Joined: January 24, 2016 Posts: 3619 Location: CT
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Posted: Fri Apr 14, 2017 2:22 pm Post subject: Re: Harbor Freight 90 Amp Welder |
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20 gauge, butt joint. 0.023 wire with 75/25. _________________ '67 Beetle L41
'74 Westfalia
'69 Plymouth "Adam-12"
'63 Ragtop
'73 914
'73 Dodge W200
'72 Dodge Wrecker
Go Cubs!
World Series Champions 2016
KentPS wrote: |
...or the PO envied the terrorists' bus in "Back to the Future". |
mukluk wrote: |
He's fine, just waiting for the dragon in winklepickers to move out of his lane. |
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theKbStockpiler Samba Member
Joined: July 07, 2012 Posts: 2316 Location: Rust Belt
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Posted: Fri Apr 14, 2017 2:54 pm Post subject: Re: Harbor Freight 90 Amp Welder |
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A butt joint on 20 gauge is going to have to have perfect to virtually perfect fit up to do a continuous weld AND you are going to have to keep the edges from warping apart about every 1/4 of and inch. This means you can't be able to see light between the pieces at all or Very Very little. I have never tried to back the seam up with copper but I'm informed that it is a technique that works. Sometimes a work around is a bigger hassle than it's worth.
If you use the 'repeated spot weld technique,butt weld with gap,manually pulse weld etcetera', you will avoid a lot of problems butt welding thin metal.
There are a few threads on how to do this in this forum. _________________ My beetle is not competing with your beetle. I have the yellow beetle in my town. There is a red one, a green one ......
Use all safety devices including a mask. |
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67ctbug Samba Member
Joined: January 24, 2016 Posts: 3619 Location: CT
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Posted: Fri Apr 14, 2017 5:12 pm Post subject: Re: Harbor Freight 90 Amp Welder |
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I'm using the spot in different places technique. I actually did what you said to do with the voltage and it started working . I got the new piece in almost perfect except I messed up the cut, but I made a patch for that too. _________________ '67 Beetle L41
'74 Westfalia
'69 Plymouth "Adam-12"
'63 Ragtop
'73 914
'73 Dodge W200
'72 Dodge Wrecker
Go Cubs!
World Series Champions 2016
KentPS wrote: |
...or the PO envied the terrorists' bus in "Back to the Future". |
mukluk wrote: |
He's fine, just waiting for the dragon in winklepickers to move out of his lane. |
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modok Samba Member
Joined: October 30, 2009 Posts: 26777 Location: Colorado Springs
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Posted: Wed Apr 19, 2017 6:08 pm Post subject: Re: Harbor Freight 90 Amp Welder |
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yeah you have to pulse 1/8 inch at a time, and freeze, then 1/8 inch, freeze, repeat. Control the heat with the how long you pause.
You don't want the voltage too low. If it's not high enough compared to wire speed you blow holes, as the wire doesn't melt fast enough it puts too much heat in the metal. More volts less wire speed you start melting the wire before it actually hits, part of the time, and that can let you weld really thin stuff, if you can get it working for you at the right rhythm.
On my old miller 130 I would use #1 voltage for around 18 gauge, but to go even thinner often back up to #2 voltage with the wire speed set about as low as practical. My eastwood with the infinite adjustemtents isn't really any better at that. it surely has a "smoother" arc but that smoothness actually does not help much when pulse welding, but does ok, I've welded packing straps together with it just fine, they are less than .020 thick!
Last edited by modok on Wed Apr 19, 2017 6:11 pm; edited 1 time in total |
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67ctbug Samba Member
Joined: January 24, 2016 Posts: 3619 Location: CT
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Posted: Wed Apr 19, 2017 6:11 pm Post subject: Re: Harbor Freight 90 Amp Welder |
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I actually did what KBStockpiler said to and got the panel in. Now I'm just filling pinholes because my panel cutting skills are a little bad and I may have had to fill a 1/4" gap with weld and a bad homemade patch. _________________ '67 Beetle L41
'74 Westfalia
'69 Plymouth "Adam-12"
'63 Ragtop
'73 914
'73 Dodge W200
'72 Dodge Wrecker
Go Cubs!
World Series Champions 2016
KentPS wrote: |
...or the PO envied the terrorists' bus in "Back to the Future". |
mukluk wrote: |
He's fine, just waiting for the dragon in winklepickers to move out of his lane. |
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modok Samba Member
Joined: October 30, 2009 Posts: 26777 Location: Colorado Springs
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Posted: Wed Apr 19, 2017 6:12 pm Post subject: Re: Harbor Freight 90 Amp Welder |
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Lots of practice. The worse you are at fitting, the better you will be at gap filling |
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67ctbug Samba Member
Joined: January 24, 2016 Posts: 3619 Location: CT
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Posted: Wed Apr 19, 2017 6:15 pm Post subject: Re: Harbor Freight 90 Amp Welder |
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No joking there, you should have seen my floor pans before the seam sealer went on. There was 1/8" lap from the pans to the lip on the tunnel in some places I couldn't even attempt plug welds . The Firewall which I'm taking out still looks like someone put the heat on high and did beads on it in some places from the old flux core welder. _________________ '67 Beetle L41
'74 Westfalia
'69 Plymouth "Adam-12"
'63 Ragtop
'73 914
'73 Dodge W200
'72 Dodge Wrecker
Go Cubs!
World Series Champions 2016
KentPS wrote: |
...or the PO envied the terrorists' bus in "Back to the Future". |
mukluk wrote: |
He's fine, just waiting for the dragon in winklepickers to move out of his lane. |
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beetlenut Samba Member
Joined: May 27, 2009 Posts: 2983 Location: RI
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Posted: Thu Apr 20, 2017 10:48 am Post subject: Re: Harbor Freight 90 Amp Welder |
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I found that panel fitment should take at least half the time it takes to do the whole job. Your gap all around your panel has to be the same, which is about the thickness of the metal you are welding, and you have to be careful with the first 5 or 6 welds to get them spaced equally around the panel circumference. You also don't want to put a spot next to another spot. You want to put the next spot as far away on the panel from the previous spot as you can. Some people use a spray bottle with water, or compressed air, to cool the metal as they go. _________________ scrapyards are for quitters
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Wetstuff wrote: |
... I spend more time shaking it than directing it?! I get a pretty decent blast for 8sec. then have to shake it again. |
- Words to live by right there!
My 74 Super rebuild thread: http://www.thesamba.com/vw/forum/viewtopic.php?p=6507104#6507104 |
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