WM 220
Out-of-balance-control by spin
The spin sequence consists of a short spin-up to 500 rpm, a so called "peak",
distribution and a longer spin.
A tacho generator, placed on the motor, measures the speed difference
between the "up-hill and down-hill" before the spin.
The greater the diffenrence, the greater the un-balance. If the unbalance is too
large, the spin is interrupted and the machine distributes the washing and tries
again.
By the peak maximal 15 attempts are made,where the unbalance must be
below 1,2 kg for spin-up. If the unbalance is still too high, the machine will pass
the spin step.
If the machine has made the "peak", the washing is distributed again, and new
start attempts to spin are made.
Hereby max. 6 start attempts are made with max. 0,4 kg permitted unbalance
to reach 1300-1600 rpm. After that further 5 start attempts are made on
unbalance level 0,7 kg and 4 start attempts are made on unbalance level 1,2
kg. If the unbalance is less than 0,4 kg, the spin is made by 1300-1600 rpm,
if it is 0,4-0,7 kg the spin is by 900-1200 rpm, if it is 0,7–1,2 kg the spin is
by 800 rpm
If the unbalance is still too high, the machine passes the spin step.
ELECTRICAL COMPONENTS
1 Control unit, program
Contains a microprocessor for operating the programs.
2 Control unit, motor
Include a microprocessor which controls the motor and communicate
with the timer.
3 Push button panel
Carries the pushbuttons and indicating lamps. A microprocessor
provides communication with the control unit.
4 Motor
The motor is an universal motor. The rotation speed is steepless
controlled by a tacho generator on the motor which measures the
rotation speed. Maximal speed is 1600 rpm It incorporates a thermal
cutout for overload protection.
5 Outlet pump
The outlet pump is combined with a needle trap and strainer that can
be cleaned by the user.
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