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Posted by Ken Sterling on April 10, 2008, 6:27 am
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>Not an expert in 3-phase stuff, but familiar with motor starters and
>contactors. Have a need to work on a Dough Mixer, which is 3-phase
>but the motor is two speed. One motor for the rotating bowl, and a
>larger motor for the dough hook. The dough hook motor is two speed.
>This is an older Italian machine (no info on it), but after cleaning
>the contact tips on the main contactor, got the motor so it will run
>on low speed and shut off when it is supposed to. However, this
>machine is designed to run for a preset time (owner selected) on low
>speed, then kick into high speed for another preselected time.
>Problem: Runs on low speed but when it kicks into high speed, starts
>to single phase, and trips out. I'm not sure how the motor is made,
>and how the wiring through the contactors would be done to accomplish
>this. Any links to show a crude schematic? I've been looking without
>much luck. Any help appreciated.
>Thanks.
>Ken.
>
Thanks, all, for the great information. I'm learning...... One of
the main problems with working on this unit is that there is VERY
LITTLE room in the control cabinet - it's nice and neat, but very
tight and hard to see where everything goes. When the new contactor
comes in, I'll just have to take a little time to "figger it out".
Worse to worse - it'll still run on low speed..... which is way better
than mixing a bunch of pizza dough by hand <G>. (At least according to
the boys in the shop that have been building up their muscles
lately<G>) Thanks again to all.....
Ken.
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