The Craftmans Shop > New from Old
Tidying Up An Analoy 1401 Alloy Analyser
vtsteam:
--- Quote from: awemawson on February 03, 2021, 11:40:16 AM ---I did wonder if I ground up a few of the used electrodes in a pestle and mortar with water and left them to settle it might reveal something, but being such a small sample would need to be in something like a small test tube.
--- End quote ---
That would be interesting. Have done same with soil... :coffee:
awemawson:
A couple of positive results today :thumbup:
The postman brought two things for this project:
Firstly a 3 mm pencil sharpener - I'd never even considered that there were such things, but not only does it sharpen the graphite rods to a very suitable point, it, like me is left handed ! (there was the choice) and at £2.45 not worth mucking about with making something. Just need the right graphite now !
Secondly some scraps of green perspex to make a replacement UV screen for the arc discharge. The one I'd glued had broken again.
My first attempt was by tracing one of the original shields onto the perspex by hand, and with a combination of band saw, sanding disk and drill make a flat blank ready for bending. I made up a simple wooden jig as the bends have to be more than 90 degrees so that the shield grips the body. The shield is located by two pins projecting from the probe and it pivots on them as well, so the holes for these need to be aligned.
It didn't come out too well, and it was a this point I realised that the 'originals' were both hand made copies that not only differed from each other but either side of them was not a mirror image of the other!
OK draw it up in AutoCAD - I ported it to the laser cutter and cut a template from a sheet of gasket material to prove it fitted - it did :thumbup: So putting a bit of perspex in the laser cutter I set it going. The cut was SO smooth and even compared to my hand made effort. So into the bending jig having been heated with an electric paint stripper, and out came a very acceptable UV shield :ddb:
I will make two more while everything is set up, so both machines can have a decent shield and I'll also have a spare.
vtsteam:
Very nice Andrew! :clap:
modeng200023:
Two things Andrew,
First, I never knew that left-handed sharpeners were made let alone available.
Second, your left-handedness explains how and why you are able to dip your toes into so many things and come out winning. :clap:
John
awemawson:
John it's fool hardy ness not left handed ness :clap:
I suppose a lifetime fighting against the system probably helps - you should have heard my Sgt Major yelling at me when we were doing Bren Gun training and I was doing it left handed. Much insistence from him for holding it right handed accompanied by words I didn't understand only increased by me pointing out that I HAD to sight it with my left eye as the other one was missing.
Oh was he pissed off when I actually scored pretty well in the squad both at 100 yard butts and 500 yard butts with falling plates :lol:
. . . then there was the Enfield No 4 where my left hand had to go over the charging port to operate the bolt . . . .but that was another story that did little for his blood pressure :ddb:
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