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New from Old / Re: Resurrection of a CFEI 100 KVA Induction Furnace
« Last post by awemawson on Today at 12:21:10 PM »
Argus 400, 500, 600, 700. first one I worked on (Wiggins Teape #5 paper mill in Dartford) was an Argus 400 with Argus 100 input output racks !

My era was mostly A500's & A700's in many variants and applications but I did have an Argus 600 in the office that I'd programmed as a digital clock - about all it was good for though Barclay's Bank used to run payroll on them at Juxon House in St Pauls Churchyard - a hideous architectural monstrosity next to the Cathedral.

We did everything from the 4 minute warning (Russian Hoards over the horizon, deep RAF radar bunkers) to mixing dough for Ginger Biscuits (McVitie's Waxlow Road Harlsden)  :clap:
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New from Old / Re: Resurrection of a CFEI 100 KVA Induction Furnace
« Last post by John Rudd on Today at 12:00:42 PM »
Ferranti computers?....
Argus GD700 by chance?
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New from Old / Re: Resurrection of a CFEI 100 KVA Induction Furnace
« Last post by awemawson on Today at 08:37:57 AM »
This 'non-maintained' (meaning it's not on all the time) emergency light is rated to last 3 hours. My test showed it to actually have a run time of 2 hours 50 minutes. If I can't get out of the foundry in less than 2 hours 50 minutes I have other problems not solved by lighting  :clap:

So I went ahead and did the repairs. Firstly I cut a strip of good quality fiberglass printed circuit board and super glued it across the crack to try and stop further movement. Then I put wire 'salvage' links between the nearest component pads either side of the breaks. There was one exception, where the track is deliberately very thin to act as a fuse - in this case I scraped away the solder mask and soldered directly to the track. All salvage links were then fixed down with a few drops of super glue.

I seem to remember when I worked at Ferranti on the process control computers boards were allowed to have up to five salvage links, but they had to be identified with a short length of red sleeving to distinguish them from 'modification links' - you were allowed loads of mod links! Mind you these were complex multi-layer boards with oodles of ic's on board.

Having proved it still worked I then mounted it over the sliding door entrance to the foundry running the lead to a spare 13 amp socket in a dual that also feeds the roller shutter.

Seems to work OK :thumbup:
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New from Old / Re: Resurrection of a CFEI 100 KVA Induction Furnace
« Last post by awemawson on Today at 07:44:50 AM »
Gosh Russ, you at least have been reading my posts  :clap:

. . . scary isn't it - just to play at melting a bit of brass !
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New from Old / Re: Resurrection of a CFEI 100 KVA Induction Furnace
« Last post by russ57 on Today at 05:51:20 AM »
Amazing it worked at all with that damage...

The score so far as best I can remember...

Buy and restore 100kva generator
Buy, restore and sell trailer for generator
Clear and renovate outbuilding for generator
Diagnose faulty  chiller
Replace chiller with total loss heat exchanger
Find, test, restore bore hole
Install bore pump and pump house
Replumb irrigation system to allow use of bore water
Replace coolant hoses
Restore air over hydraulics
Repair emergency light
Install earth bonding between multiple outbuildings
Clear room for furnace
Build external storage cage for O/A cylinder storage (part of clearing)
Reinforce shelving
Install 3phase 'domestic' supply for 'ping'
Repaired cold saw
Provide enormous entertainment and education for the unwashed

No doubt some I have forgotten.

I'm hoping this is not the end, but maybe you have something even better in store...


-russ
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New from Old / Re: Resurrection of a CFEI 100 KVA Induction Furnace
« Last post by Sea.dog on Today at 05:28:29 AM »
 :beer:  :D
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New from Old / Re: Resurrection of a CFEI 100 KVA Induction Furnace
« Last post by awemawson on Today at 05:19:54 AM »
Well Graham it's two and a half hours into a three hour 'run test' and doing well - 2.4 volt battery down to 2.23 volts.

So you'll be pleased to hear that I WILL put proper repair links on the PCB along with a bit of epoxy glue, re-assemble it and stick it over the sliding door entrance to the foundry - pictures will follow later !
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New from Old / Re: Resurrection of a CFEI 100 KVA Induction Furnace
« Last post by Sea.dog on Today at 02:29:14 AM »
"Barely worth repairing."

BARELY WORTH REPAIRING?   :bugeye:

Wash your mouth out man  :lol:
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Tools / Diamond Lap for Sharpening TC tools
« Last post by sbwhart on Today at 01:59:43 AM »
Just knocked this together works well




Stew
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Project Logs / Re: Extending the soundscape of a hexaphonic guitar pickup
« Last post by sorveltaja on August 05, 2020, 05:50:19 PM »
Today I've been mostly scratching my head, about how to draw a 'bus board' for the blocks:



Idea for that came from the Elector vocoder. I'll draw 3d-model of all the boards(blocks), as they are built.
Usually on more complex projects like this, it's the best way for me to make sense, by 'simulating' the objects, that have actual physical dimensions.
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