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| A generator for Elmer. |
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| Joe d:
Abraham: This is looking really good so far, I'm much enjoying following along. Looking forward to the next installment! Cheers, Joe |
| PK:
Wow...just wow... I'm so impressed with the thought and skill that's going into this project! |
| modeldozer:
Hi Joe, thank you for the kind comments. Had to replace the bitumen felting of my shed’s roof so did not do a lot on the generator. A parallel was used to set the post square while holding it in the lathe collet chuck clamped to the mill table. A stepped slot was milled in each post. for locating the brush holders. The holders ready for soldering. Cheers Abraham |
| modeldozer:
Hi all, The shed roof is finally finished and will hopefully keep my machines dry. Had to make an extension for the armature shaft to be able to fit a pulley, but try, as a may could not get it to run true once fitted to the armature. For the fourth attempt ended up using an old wood router bit as a boring bar for he recess in the end of the shaft, witch seems to have done the trick. Testing the run out with the armature fitted. Armature with extension fitted. Next up a fake bush end was turned from brass. Fitted to the front bearing. Made a form tool from a piece of mild steel to turn a small flat belt pulley. Turned the pulley. Faced the end after parting off. Mounted the pulley in the mill vice with a few pieces of paper to electrically insulate it so I could use a multi meter and a piece of 3mm rod to locate the centre of the small hub. A hole was drilled and taped for a grub screw. The armature assembly. The bearing posts were mounted on the lathe and the boss sections rounded over with a round over end mill. The finished posts. The generator was assembled. My idea to use some small magnets to generate enough current to start excitation was not successful so for the moment it needs around 2.5A excitation current from an external source. I have ordered some different magnets to experiment with and maybe have the field windings only as fakes. Next up is a large pulley for the engine. Does anyone know of a source for flat belts, have searched the web but could not find a supplier that would deliver to Spain? Need one 700mm long 12mm wide. Cheers. Abraham |
| Kjelle:
WoW!!! Check sewing machine spares, or automotive spares for the belt... The dimensions look like a poly-v should fit... Yuo don't need the grooves for it to work. Kjelle |
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