Titivating A CNC Plasma Table

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AdeV:

--- Quote --- I'm too big headed not to get stuck in
--- End quote ---

Nowt wrong with that! I mean, who did I think I was designing and making a dry sump for a highly-stressed race engine? Me, with no engineering credentials whatsoever....? IMHO belief is a big part of what we all do here, and having a large book of excuses to hand is a useful back-stop if it all goes wrong :lol:

awemawson:
Ade, it was your dry sump thread that tempted me onto / into the forum :clap:

So today's task - and so far it's gone pretty productively - is to work out how to mount the very powerful extractor fan. After all most of this re-build has been aimed at achieving 'down draught extraction' through the slats.

First issue - the rear cross member of the frame obstructs the line of the duct were it to go horizontal. I'd originally intended that the fan sat on the floor and was connected by flexy duct, and it would work fine like that, but I wanted to integrate the fan. (Mainly as it is going to be stopped and started under program control from Mach3).

So I decided to replace the cross member with one at a lower level, and also form a 'hanging cross member', and let the fan straddle the pair of them, with it's rubber anti-vibration feet sitting in 'cups' to stop it falling off.

The output from the duct that I had made will connect to the fan by a short length of 12" circular flexy ducting, and the exhaust from the fan will go outside via a yet to be made wall plate.

So before breakfast I had all the bits cut to size (oh I love my Pedrazzoli cold saw !) and then after porridge I set too gluing them all together with the MIG.

That all went pretty well, and left me time to give them a good degreasing and a blow over with Ford Tractor Blue. The 'Plasma Perch' and the trunnion got a coat at the same time, so now it's wait for the paint to dry time :coffee:

DICKEYBIRD:
I KNEW IT!:doh: Your plasma machine is called "Blue Peter" which is the super-secret military code name of the RAC's hyper-speed simulation tunnel for testing advanced top secret aircraft models.

Harrumph, down-draft extractor fan my sweet grannie's arse! Oh yeah, how's that new "tractor shed" coming along? (Wink-wink, nudge-nudge)

awemawson:
:lol:

awemawson:
The newly blue trunnion and 'plasma perch' and gallows bracket got returned to their rightful places and I set too fixing the new rear cross member and forward hanging support for the fan.

Then I cut out the original rear cross member - as expected the rear legs moved a bit and will need clamping when I fix the replacement.

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