[Jewelry making - Article 00254] - Re: [Orchid] Rio Grande melt furnace problems

[Dave Arens]

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Hi Rick

    I'm not familiar with the unit you mentioned. However the problem
    described is one that can & has occurred in many devices that use
    replaceable fuses. 

    If I had to guess, I bet the fuses used were the cartridge type
    fuses. They could be either the glass or the fiber type. 

    What is happening is there is a poor electrical connection between
    the fuse & the fuse holder. This poor connection can be caused by a
    couple of things. 

    1. The ends of the fuses may be dirty or corroded little; this will
    cause a poor connection. Before installing the fuse clean off the
    ends with fine sandpaper or steel wool. 

    2. The inside of the fuse holder may also be dirty or corroded.
    Before inserting a new fuse, clean the inside of the fuse holder with
    fine sand paper. I wouldn't use steel wool here as any strands left
    behind could cause a short or other problems. 

    3. Another thing that could cause the problem is insufficient
    tension in the ends of the fuse holder. This could be caused by
    repeated insertions/removal of fuses or inadvertently spreading the
    sides of the fuse holder when fuses are inserteted/removed. To
    correct this problem use a pliers to squeeze the two sides of the
    fuse holder together a little. 

    4. It's also possible that the fuse holder was improperly made &
    didn't have enough hardness to provide the tension required. Once the
    fuse holder has been used this is cause is impossible to determine. 

Dave
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