This is a Bachi 115 ECR Magneto Coil Winder with two de-reelers and wire tensioners. It's a really nice little coil winder and works very well. We did a lot of research before buying one of these to be sure it was going to do what we needed and do it well. See the snow out the window? It's March in Maine.
This is the Bachi's control panel. This is where we set our Bachi to run in as many as three different modes and it tells the winder when to stop, when to slow down, what speed to wind at and what speed to slow down at. The reason for the slow down before the stop is that we are working with wire that is the size of a human hair and it breaks very easily, believe me I know! So, we slow the machine down before it comes to the final wrap so that it's going real slow when the machine stops the winding process at the exact right number of turns.
Here is a photo of our baking oven and on top of that is our vacuum gauge that my Dad built actually. Anyway we use the vacuum gauge when we vacuum impregnate our magneto coils. Whats that you say? Well we bring our coils down into a vacuum to get rid of all the air and moisture and then add varnish, The vacuum sucks the varnish into the coil and poof, we have a completely sealed coil!! Cool huh? Underneath is a hand coil winder that we use when we have to take apart a coil that we haven't done before so we know how many turns are on it and what size wire it was wrapped with. We're talking around 10 to 20 thousand wraps of wire that is about .001 or the size of a human hair!!!
This is one of our rewound coils being tested on our Graham-Lee Coil Tester. We test the primary and secondary resistance, as well as testing the coil for actual spark against the factory specs. All our coils will fire under the factory specs. What this means is that the factory puts out a spec that says the coil should fire with this amount of voltage and amperage. When a coil can fire below these specs it's a good thing. If it takes more than the rated specs to fire a coil the coil is deemed no good as your magneto will have a hard time to make it fire if it will fire at all. On average our rewound coils sell for $170.00 exchange. Rebuilt condensers are $30.00 exchange and a total rebuild of your armature will run around $250.00 Please note that none of our coils are approved for use in the aviation industry.