I'm trying to make a cheap variable power supply for a hot wire cutter. As I will be trying different wire thicknesses and lengths I must be able to control both amperage and voltage. To do this I have a light dimmer wired up to an electrical transformer. This lets me vary the power between 35 and 150 watts. My original plan was to follow this with a variable magnetic transformer/ multiple transformers and switches to control the voltage amperage ratio. My problem is the documentation for the electronic transformer says it must not be on the same circuit as inductive loads.
How much of an issue is continuing with my current plan? and is there a way to solve the implied problem? ... perhaps with a diode.