03-21-2019, 08:09 AM
Thanks, EdHolland. I found an old 5lb spool of non ROHS 34AWG magnet wire here at work and we have an old winding machine that is used for prototyping which I can use. I just have to design a mandrel to mount and hold the bobbin.
I measured and calculated the voice coil gap to be about 0.040" and the diameter is 1", so to center the pole piece when pressing it back in I need to find a circular tube of that thickness and outer diameter. It can be metal, plastic, FR4 or even cardboard as long as it centers the pole piece and doesn't move as I press it it. We have a number of FR4 tubes that we use for bobbins and HV insulators here at work so I will have to search through them and hopefully I'll find a suitable one or one that I can machine to the proper dimensions.
Steve D
I measured and calculated the voice coil gap to be about 0.040" and the diameter is 1", so to center the pole piece when pressing it back in I need to find a circular tube of that thickness and outer diameter. It can be metal, plastic, FR4 or even cardboard as long as it centers the pole piece and doesn't move as I press it it. We have a number of FR4 tubes that we use for bobbins and HV insulators here at work so I will have to search through them and hopefully I'll find a suitable one or one that I can machine to the proper dimensions.
Steve D
