New Member

[therecklessengineer]

Welding a sealed joint with MIG is tricky. It's very easy to get inclusions on the start - the best technique is to simply not stop! Welding around a drum I tend to do by rolling it slowly as I'm welding. You can get the whole way around without stopping then.

Easier to get a perfect weld with TIG - but on a drum your fabrication must be 100%. Any much of a gap and you'll struggle to fill it.

Arc is best for welding a sealed joint, but then it's troublesome on thin sheet.

My personal combination for drum welding, MIG to start and then if it leaks, I go over it with the TIG.

[kamaangir]

Its nice to have that choice

[therecklessengineer]

Yes it is. 

You can go over a mig weld again with the wire speed turned right down. It's called 'dip and spray' and will leave big globular puddles of weld. It can look great, but there's a risk of burning through as not enough material is introduced to reduce the amount of heat.

[Julian]

I've started a new wiki page here ... http://www.biopowered.co.uk/wiki/Processor_build_step_by_step

It's populated with text which can be overwritten or added to as you go.

It is possible to link to external photos, but the page is better optimised if photos are up loaded to the wiki.  To do this go to the "upload file" link in the toolbox menu on the left-hand side of each page and follow the steps.

Once they are uploaded to the wiki you can stick them on the page by using the following simple code ...

[[File:File.jpg]]    to use the full version of the file
[[File:File.png|   200px|thumb|left|alt text]] to use a 200 pixel wide rendition in a box in the left margin with 'alt text' as description
[[Media:File.ogg]]    for directly linking to the file without displaying the file

Or a gallery ...

<gallery caption="title" widths="300px" heights="300px" perrow="2" align="left">
File:file name 1.jpg|Text under pic here.
File:file name 1.jpg|Text under pic here.
</gallery>


Have a bash, you can't screw things up as the pages can always be rolled back to a previous version.  Any problems, post on here and we'll be pleased to help or edit the page.

[Jamesrl]

Welding a cone to a drum.

It is far easier to weld a lap joint than try to lay a fillet considering the gauge of the drum.

You will need 0.6mm wire and a proper shield gas that is suitable for shallow penatration, Co2 isn't really good enough.

Fit the cone on the drum and tack the lap joint every 6 inch, close down any gaps between the cone and drum wall, grind flush all tacks.

Lay the drum on its side and weld in a downward direction between the 10 and 20 past position. You'll have to get the weld speed, amps and wire feed just right so a bit of practice will be needed before you weld in anger.

Grind back flush the last 15-20mm of each section of weld and start the next section on top of it, when you get to the last run of weld grind both ends flush so you start and finish over the existing welds.

[Julian]

Welding a cone to a drum.

It is far easier to weld a lap joint than try to lay a fillet considering the gauge of the drum.

You will need 0.6mm wire and a proper shield gas that is suitable for shallow penatration, Co2 isn't really good enough.

Fit the cone on the drum and tack the lap joint every 6 inch, close down any gaps between the cone and drum wall, grind flush all tacks.

Lay the drum on its side and weld in a downward direction between the 10 and 20 past position. You'll have to get the weld speed, amps and wire feed just right so a bit of practice will be needed before you weld in anger.

Grind back flush the last 15-20mm of each section of weld and start the next section on top of it, when you get to the last run of weld grind both ends flush so you start and over the existing welds.

Colud be a good addition to the wiki page.

[Jamesrl]

Feel free to use it Julian, I ain't smart enough (can't be arsed to learn) to work the wiki pages.

[Julian]

It's really up to loz⁵ to slot it in where he sees fit.

[lozzzzzz]

Thanks Julian, I'll get on it at some point this weekend.  I'll try and condense down the advice given and put it in the wiki. 

[Julian]

Thanks Julian, I'll get on it at some point this weekend.  I'll try and condense down the advice given and put it in the wiki.

Just to get you started, I've nicked a photo from your photobucket pages uploaded and stuck it on the page ... it's probably a bit easier to start that way.

I've put up a straight photo with title, a gallery, pasted in Jim's text and called the first headding "Processor tank".  See how that automatically appears in the TOC.

Have a play with the code.  You can change all sorts of things ... photo widths, numbers in a row in the gallery, justification etc, etc.

Don't worry too much how it looks during construction, it won't be indexed on the main page until you're ready.

[Rotary-Motion]

its gone very quiet on this thread I feel the start of a build coming on

yehaaaaaaaaaa

 

[lozzzzzz]

A mini update (then some excuses)

The pump arrived, and was a little disappointing to start with.  Lots of bimetallic corrosion meant all the bolts were not going to move, so I snapped them all off and have a great plan to get round it, the motor was not turning either (by hand) but after a little dismantling and freeing it looks like its rescue-able.  More on this to come.  I've been very busy getting the Scimitar ready for the road again, and have a horrendously busy week approaching so unfortunately that's all I've managed to get done.  The busy week ahead could be rather exciting too   I'll keep you posted. 

This and the wiki page will become very busy soon, but I'm not going to have any time over this week, sorry for the non start. 



More to come  (just not for a little while )

[Jamesrl]

Loz, don't worry about getting things done quickly,  take your time and get it right first time.

[Julian]

Loz, don't worry about getting things done quickly,  take your time and get it right first time.

I build extensions on that basis.

[Jamesrl]

Loz, don't worry about getting things done quickly,  take your time and get it right first time.

I build extensions on that basis.

I didn't know you had extensions,  I thought it was a wig.