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Fri, 9 Feb 2007 15:08:55 -0500 |
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Well, my three-year-old Nilfisk suddenly stopped working, right in the
middle of a big project of course. So I called Nilfisk and got some good
information. I talked to three people, all of whom were helpful. But if you
need to call them talk to Vince, he was very informative. He told me that
they changed from a 7 amp motor to an 11 amp, and then found that the old
speed controller was burning out the motor when used at low speeds. So they
found a new controller that would only allow you go down to about 50% of
full power. They are now using another new controller that will go down
further, to 25% or so. This is not as far as the old controller (which was
about 10%), and it's 25% of a bigger motor so the suction will still be
stronger than we're used to. It's too bad they switched motors, but I guess
most of their customers want more suction. I guess it's only museum folks
who use the speed controller.
I found out that my machine has the old controller and the smaller motor,
which was a relief. I sent the top of the machine to Nilfisk for repair,
and I had it back just over a week later. Luckily, it was just my power
cord that was bad, they replaced it and did it under warranty.
In the meantime, I used my other HEPA vac with the Variac speed controller
that I mentioned in my previous post. It worked great, pulling the motor
down to almost nothing. I would definitely use this in preference to a
newer Nilfisk.
Deborah Bede
Stillwater Textile Conservation Studio, LLC
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