Stuff you have made today

[Hood]

What’s the benefit of nitrogen over normal air?

Better cut quality for aluminium and stainless. How much better I have no idea as I have never used it.

 

[James1979]

If it’s better on thin stuff (<5mm) which I do most of in stainless it may be worth a shot.

It’s one of those things though, I’d probably try it if I got a used cylinder from somewhere but too much to get a whole cylinder on rental just for a gamble.

Wonder what argon would be like.

 

[Sergei Slovenija]

What’s the benefit of nitrogen over normal air?

Less slag, cleaner cut.

 

[Hood]

If it’s better on thin stuff (<5mm) which I do most of in stainless it may be worth a shot.

It’s one of those things though, I’d probably try it if I got a used cylinder from somewhere but too much to get a whole cylinder on rental just for a gamble.

Wonder what argon would be like.

Water table made a huge difference for me on stainless, only the very top of the edge has signs of oxidisation. Keep meaning to weld on a strip at the back of the table so I can fill up a bit more and try submerged cutting.

 

[James1979]

Water table made a huge difference for me on stainless, only the very top of the edge has signs of oxidisation. Keep meaning to weld on a strip at the back of the table so I can fill up a bit more and try submerged cutting.

I keep thinking about it. I’ve got dust extraction at the moment but wonder about water tray.

Doubleboost had one but took it out which seems to be what most folk do so I dunno…..

 

[Hood]

I keep thinking about it. I’ve got dust extraction at the moment but wonder about water tray.

Doubleboost had one but took it out which seems to be what most folk do so I dunno…..

Best thing I did was make it a water table.

 

[Maker]

Wonder what argon would be like.

Expensive!

 

[DAPPH]

Probably, but then it's only 25mm, I thought about it.

My objection with cooking oil is it goes bad if it kicks around too long, especially exposed to the air. I've got some mineral oil somewhere, that would work I reckon.

Olive oil has been used for reconditioning washed and naturally dried rolling pins & pastry boards for thousands of years though those items did get daily use and cleaning.

What’s the benefit of nitrogen over normal air?

No oxidization with nitrogen

 

[DAPPH]

You might be right, I'll post an update in a few months, or sooner if they're really shish. I make noodles often (and I can't afford the rolling machine I want) so they should see a lot of use.

Buy a stainless steel machine see eBay # 325377258807 at £22 ish they are excellent value especially the one that does half a dozen styles including noodles . ( this one is very similar to ours )

 

[DAPPH]

Found a spare couple hours to mess about.
View attachment 367746
Took me way longer than expected to pour the plaster and may have messed up the timing, but it was still very runny. 3 mixutes to mix, powder to water. 1 min to vacuum. 1 min to pour. 2 mins to vac and release.
View attachment 367747
View attachment 367751

Upto this point it was going quite well,but who knew that PLA floats!?!
Saw the cows nose bobbing above the surface. Stuck my fingers to try and position it until started to set. I may have cocked this up!
Theres not much clearance between the print and flask so I wouldnt be suprised if it cracks in a thin place.

I went with the measures for a 4" * 63mm flask, 262ml water, 652g plaster, Id say about right, only a little excess.

Stick the form to the base plate of the mould with silicone mastic then when it's set make the rest of the cast .

 

[Kram]

Nah the next one will be stuck down with wax. The base needs to be easily removable as thats the burn out vent/pouring holes.

Sillicone seems to be recommended a lot on here and by builders but I hate the stuff!

Started the drying/melting, you can see the wax top is well off center, the mould is probably touching the edges or very close, that wont be good for the brass pour!

I dont like the look of plaster, very thin in places. I may carve the thin areas.

This plaster flask painfully too big for this furnace, while being too small to properly fit the mould.

 

[Maker]

Buy a stainless steel machine see eBay # 325377258807 at £22 ish they are excellent value especially the one that does half a dozen styles including noodles . ( this one is very similar to ours )

I've been using mum's old Imperia pasta machine for years, it works great but I'm wary of buying a new one and finding they've changed the design and they're rubbish now. There's lots of people online who say they've broken pasta machines rolling noodles (I tend to make alkali noodles around 40% hydration, some recipes go as low as 25%, it's a very stiff dough). TBH I suspect most of these people are buying the cheapest ones they can find and then trying to mash a huge ball of dough through it, rather than flattening it beforehand and being a bit more careful.

I almost certainly will just buy another pasta machine, I'm not about to spend silly money importing a brass and cast iron one, but I'll always be lusting after one. Until I make my own..

 

[Tupers]

I spent my afternoon building up and resculpting a big gouge in a marine pod. Not the simplest thing to weld as I was using long 6mm slithers of the parent material as filler rod but it came out ok.

 

[Brad93]

I spent my afternoon building up and resculpting a big gouge in a marine pod. Not the simplest thing to weld as I was using long 6mm slithers of the parent material as filler rod but it came out ok.
View attachment 367922
View attachment 367923
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View attachment 367925

Is it bronze?

 

[henry Kadzielski]

My contribution. Nitrogen as a result of no oxidizing gas will leave a better edge finish on stainless steel and alloy.
First photo is a closeup of stainless 316 and this is the scrap section

As all can see there is no burnt sugared section on the cut edge. The edge is smooth and shiny.

Even though the alli doesn't look like it, it is very much smoother and almost shiny like on the cut edge. The dross is less and the fume generated during cutting is less.
Now, are there other ways to achieve this, well yes, however this is what I have done to suit me. I wanted primarily to have a better edge when cutting stainless and this is what I have achieved, the alli was a bonus. I tried this a long time ago using a nitrogen bottle, yes it worked but consumed 'very much' nitrogen so I got a nitrogen generator. Problem solved. Also to note that we are cutting stainless at about 80% of the compressed air cut speed. With no oxygen there is no exothermic reaction 'thermal oxidation which is why you get that sugary burnt look' it is purely cut by the thermal temperature of the plasma flame. Alli on the other hand there is no speed change from the book spec. My two cents worth


Good afternoon @Hood. There has been talk and some vids a while ago about submersing (to what extent I don't know) material under the water and cutting for better edge finish. Not all plasma torches can do this so it would be very interesting to both see if it actually works and well it works. YOU'R THE MAN.

 

[maroon]

Today I bent a bit of plate. Chassis leg offshoot type thing To which holds the jacking point on a pugrot van. Decrudded the bit that sticks onto that bit (where the Jack goes the 2mm stuff) . Probably stitch it on at the weekend

 

[henry Kadzielski]

My apologies @James1979 Also the nitrogen makes the consumables (nozzle and electrode) last much longer. I cut the first 5 sheets with the same consumables, which still looked pretty good.

 

[eLuSiVeMiTe]

Back at this place so grabbed some pics. Aged well over the last 12 months.

 

[Kram]

Fired up furnace again to burn out the PLA. I might try to do a brass melt after lunch.

This cup was catching the wax yesterday.

If you zoom on the two holes you can see the negative of the text and 3d.print lines of the cows nose, in the plaster, quite happy with the detail, theres some carbon left.

This was a few hours at 250c, and it bloody stank with smoke. I think next time, I'll give it an hour or so at 200c and check if the molten plastic has ran out.

 

[striker]

Made a manual winder for my lathe spindle.
For using taps and dies and maybe single point threading. Had a terrible time tig welding. A lot of porosity. I was too lazy to clean the cutting oil off. Won't make that mistake again!