On this rare occasion, I would have to agree with Axil. He wrote: *"I would map the magnetic field strengths over the entire face of the billet, front and back. I would NOT apply any magnetism to it for fear of changing something. Use only passive magnetic sensors."*
Since the ferrite will have hysteresis in its curve, and due to the energy being delivered, I would expect large magnetic field swings that could well have left a latent image of the magnetic field pattern being excited in the block. While it may be difficult, mapping the magnetic field direction on the 6 faces of the block may provide a good clue into how the coils were wound. On Mon, Feb 27, 2017 at 12:36 PM, Axil Axil <janap...@gmail.com> wrote: > One huge advantage that Brian A has over all other replicators is that he > has a working billet. As a systems engineer, what I do when reverse > engineering a old system is to spec it out as well as could be done. > > That working billet is the KEY to the system. If I had the billet, I would > map the magnetic field strengths over the entire face of the billet, front > and back. I would NOT apply any magnetism to it for fear of changing > something. Use only passive magnetic sensors. > > I would write a specification of the original magnet which would include a > magnetic map of the field patter that it produced. > > I would never run tests on that original billet for fear of changing it in > some way. > > Then I would duplicate the magnetic field patterns produced by the > original billet so I could run tests to see what the coils did to the field > pattern. > > I would then submit the billet spec to a magnetic specialty company to > produce a billet that met the billet spec and duplicated the original > billet. > > Such a company is Polymagnet, a magnetic fabricator. > > http://www.polymagnet.com/ > > I would then verify that the replicated magnet received from the magnet > fabricator closely followed the billet spec. > > With the replicated billet in hand, there are two types of coils to now > reverse engineer, the actuator coil, and the output pickup cable(S). > > The output cable(S) is the one connected to the full wave AC to DC diode > rectifier. I would identify that rectifier and test how it works, then look > for some indication of which coils it connected. > > I would spec out the AC power source before using it in any way. After the > spec is written, I would then replicate the actuator power source and not > use the original one. > > I would spec out all coils and replicate them, I would not use the > originals. > > I would do the same for the actuator coil that must be connected to the > actuator power source(square wave generator). > > As much as possible, use the duplicates and not the originals. Document > those originals as far as possible. Those originals are far too valuable to > mess up in any way. >
