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1. Embed this notice
   botvolution (botvolution@mastodon.sdf.org)'s status on Friday, 25-Apr-2025 02:49:53 JST botvolution

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   • Extreme Electronics

   @Extelec
   Discharge
   Ball
   Connection

   • Embed this notice
     Extreme Electronics (extelec@mstdn.social)'s status on Friday, 25-Apr-2025 02:49:55 JST Extreme Electronics

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     I've added some pvc pipe to the discharge ball connections.

     Much less leakage.

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     Extreme Electronics (extelec@mstdn.social)'s status on Friday, 25-Apr-2025 02:49:56 JST Extreme Electronics

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     Another problem, with use the brass brushes are work hardening and become brittle.

     This is due to the gaps in between the Rods (doesn't happen on a Wimshurst as there is a disk between sectors)

     Alot of thinking later, I decided to try woven EMI shielding material backed with "repair tape" to give it strength, and some spring.

     Before and after photo of a still working brush. Brass on a long standoff, and cloth on a long brass standoff (can't add alt for some reason)

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     Extreme Electronics (extelec@mstdn.social)'s status on Friday, 25-Apr-2025 02:49:57 JST Extreme Electronics

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     Seeing a lot of leakage from the Rods to the discharge balls. I need to get some pvc pipe to counter this.

   • Embed this notice
     Extreme Electronics (extelec@mstdn.social)'s status on Friday, 25-Apr-2025 02:49:58 JST Extreme Electronics

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     Spark shields are now longer and don't arc over. And in a common theme for this machine. I've 3d printed some discharge balls whilst I'm waiting for proper threaded balls to arrive.

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     Extreme Electronics (extelec@mstdn.social)'s status on Friday, 25-Apr-2025 02:49:59 JST Extreme Electronics

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     Quick bodge on the nutrillisers and another try. Much higher V, but now it's arcing around the spark shields to the rods, this is way over the design voltage, much more than I could have thought possible. Very happy indeed. :)

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     Extreme Electronics (extelec@mstdn.social)'s status on Friday, 25-Apr-2025 02:50:00 JST Extreme Electronics

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     OK on 6v (4xAA) I get 3cm flash over to the neutraliser bar.

     This is good, I'd designed it for 90Kv and one side only is flashing over at 90Kv (effectively to earth)

     Easy to redesign the bar with much less conductive area, so very pleased for a first try. :)

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     Extreme Electronics (extelec@mstdn.social)'s status on Friday, 25-Apr-2025 02:50:01 JST Extreme Electronics

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     Just cranked it by hand, and nothing... :(

     Then I cranked it the right way round, and got some small sparks. It only revolved about 1/2 a turn :)...

     Time for some power...

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     Extreme Electronics (extelec@mstdn.social)'s status on Friday, 25-Apr-2025 02:50:02 JST Extreme Electronics

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     So i now have a mostly complete Dirod electrostatic machine. Or a faulty Dirod machine ...

     This is the scary part, when the glue is dry, I can try to power it up.

     I suspect I have about a 1:4 chance of it working.

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     Extreme Electronics (extelec@mstdn.social)'s status on Friday, 25-Apr-2025 02:50:03 JST Extreme Electronics

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     Inductors connected to the charge collectors by a 3d printed piece (covered in foil) the idea is that the minimum radius is 12mm "everywhere" again to prevent corona leakage.

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     Extreme Electronics (extelec@mstdn.social)'s status on Friday, 25-Apr-2025 02:50:05 JST Extreme Electronics

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     Motor mounted to the frame and central shaft

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     Extreme Electronics (extelec@mstdn.social)'s status on Friday, 25-Apr-2025 02:50:06 JST Extreme Electronics

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     Frame laser cut, and the pieces "wedged" together as screws are annoyingly conductive.

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     Extreme Electronics (extelec@mstdn.social)'s status on Friday, 25-Apr-2025 02:50:07 JST Extreme Electronics

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     24 rods, 2 boots for each rod, on two disks about a single axle.

     All held together with glue (and a drop of blood) drying held in my vice.

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     Extreme Electronics (extelec@mstdn.social)'s status on Friday, 25-Apr-2025 02:50:08 JST Extreme Electronics

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     Blood has now officially been spilt on the project, so it now has a chance of working.

     Maybe paying more attention to what I'm filing may help not feed it any more.

     (no, no pictures, not a lot of blood, but one drop is enough, isnt it?)

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     Extreme Electronics (extelec@mstdn.social)'s status on Friday, 25-Apr-2025 02:50:09 JST Extreme Electronics

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     The Cad Drawing that started this thread has got disconnected somehow, but this is what I'm building.

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     Extreme Electronics (extelec@mstdn.social)'s status on Friday, 25-Apr-2025 02:50:10 JST Extreme Electronics

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     The Rods each need each end to be chamfered and have a rubber boot glued on to prevent corona.

     24 rods, 48 chambers and 48 boots...

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     Extreme Electronics (extelec@mstdn.social)'s status on Friday, 25-Apr-2025 02:50:11 JST Extreme Electronics

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     3d printed boss made in Blender.

     Works first time :)

     Of course, the steel ones I've been waiting for will now turn up :)

     (duplicate post as I didn’t add it to this thread)

   • Embed this notice
     Extreme Electronics (extelec@mstdn.social)'s status on Friday, 25-Apr-2025 02:50:12 JST Extreme Electronics

     24 rods cut, 2 charge collectors complete, 2 brushes for nutrillisers done.