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| Building the Minimag |
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| lordedmond:
--- Quote from: bogstandard on February 13, 2011, 07:18:41 AM ---Sorry this final post has taken so long, I had done a little bit too much , so I just took a nice steady rest. The plate that covers the rotor was made to drawings, and as you can see, it had to have a big hole in it to give the rotor somewhere to stick out into. I still thought it wasn't really swarf proof, so I turned up a disc with a very shallow spigot on it to fit into the hole and duly soft soldered it in. Unfortunately, I had to a bit of bling as well. So my trademark of concentric circles and a bit of playing about with my latest digital toy, my rotary table, I came up with this. The cable strain reliefs were made and fitted, just to stop the cable from flopping about all over the place due to vibration, and maybe later on causing a breakdown due to fracturing of the inner strands. The test rig was then made up and the Minimag given a turning over. I tried to get a vid of it showing the sparks on the plug, but underneath the lights you couldn't see them hardly at all, and in the pitch black my camera wouldn't work, so my word will have to do. So the unit has been built and tested, I will just have to wait until my big engine is built to see if it works OK on that. I'm sorry I can't go into more detail, but this post has over run by over a week, so I must now get back to the flamelicker project, otherwise that will end up in a box somewhere. I hope you have enjoyed the journey. Bogs --- End quote --- John As you comment on a low output have you tried it without the new cover ? as I am an Electrical Eng ( when I when to work 14 years ago ) consider that the brass cover plate could be presenting a single shorted turn to the magnet maybe try without the cover , if this works then make the cover out of a none conductor Stuart |
| Bogstandard:
Stuart, I never commented about low output, just that under bright lights the camera couldn't pick up the spark too well. In darkness there was enough sparks for everyone and his dog. The back plate is in fact part of the original build sequence, and there is no difference to the sparks whether it is there or not. John |
| lordedmond:
John Sorry I misunderstood your comment It was just a comment as I have come across similar problems in the past with brass plates and magnetic devices In one case some cables had been installed with brass bushes round each core , result brass got so hot it melted the insulation on the cables Stuart |
| Bogstandard:
I have a few apoligies to do on this post. All those that queried why this unit didn't have a condensor and I replied that none was supplied and as far as I knew it didn't require one. Anyhow, talking thru things with Julian, he did mention that even though there is no external condensor with the Minimag, the coil actually has one built into it and is all contained within the potting shell. Anyway that bit is now explained, and for all you doubting Thomases, and especially of interest to the Webster builders. Because I don't have an engine to try my Minimag out on, Julian very kindly cobbled together a mounting and has done a video of his Webster running with my Minimag doing it's own thing. The extra 'clicking' towards the end is radio interferance. Bogs |
| sbwhart:
Love that crazey beat :headbang: :headbang: :headbang: :headbang: :headbang: Very nice Stew |
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