Been researching Mexican washers and I have to admit I like what I see. There is no reason why Speed Queen could not have incorporated a mechanical timer, splutch, tub break, and normal eco cycle with minimal electronics. 30 year old Brastemp:
http://4.bp.blogspot.com/-AmLGduhWAcQ/U54RJSDkjWI/AAAAAAAAAY4/us0D8m-rc88/s1600/Bll22mab+mondial.jpg
Machine fills via 6B (US machine would have a few extra contacts for temp section) until the pressure switch is satisfied closing into PR which energizes the motor control via 4B. The motor control cycles power between AM and VM each second achieving agitation by clockwise and counter clockwise of the motor. The motor control can be designed to provide any stroke necessary at near any speed. The PSC motor is very efficient- much more than the centrifugal start it replaces. 4B opens and then 4T closes activating the pump and shifter solenoid. The solenoid engages the clutch while simultaneously releasing the brake band around the drive tube drum. As the water pumps out the pressure switch resets closing RO. This is to assure the machine does not go into spin with a full tub of water as there is no clutch or belt to slip to take the strain off the motor. Once empty, 8B closes energizing VM directly putting the tub into spin.
It is possible to configure the control such that when 8B is closed, the back feed into terminal motor control VM activates a timer and relay which makes and breaks continuity between MR and BR/RR- a gradual spin ramp up sequence the lasts 1 to 2 minutes and then terminates allowing full uninterrupted spinning.
This ramp up sequence can reduce the risk off balance tub banging and be used on the start of the normal ECO to saturate clothes. On the start of the normal ECO bypass 2T can be closed allowing a 1 minute timed increment or a 2 or 3 minute increment(s) with a sub interval 8B. As the machine fills for the first minute or more, the motor control (or even timer if SI) pulse spins the motor. This saturates all the clothes and has them fall to the bottom. The timer advances out of the spin & wet increment into a 1 minute timed fill only to lead the timer out of the first- making sure that a condition of both 4B and 8B closed can not take place. The timer advances into a new increment where the Bypass opens and the machine is allowed to fill until the pressure switch is satisfied. The catch is that on the normal eco cycle a different pressure switch is used allowing only a 1/10 tub fill- for the other cycles it is shunted out.
The eco cycle continues like the others- and for rinsing a series of spay rinses is used.
It is possible that one could add a 3B or 3T terminal and another lead to the motor control that does slow speed agitation- good for delicates and the normal eco due to the reduced fill.
I think if Speed Queen had gone this route it would have been a win-win for everyone.
http://4.bp.blogspot.com/-AmLGduhWAcQ/U54RJSDkjWI/AAAAAAAAAY4/us0D8m-rc88/s1600/Bll22mab+mondial.jpg
Machine fills via 6B (US machine would have a few extra contacts for temp section) until the pressure switch is satisfied closing into PR which energizes the motor control via 4B. The motor control cycles power between AM and VM each second achieving agitation by clockwise and counter clockwise of the motor. The motor control can be designed to provide any stroke necessary at near any speed. The PSC motor is very efficient- much more than the centrifugal start it replaces. 4B opens and then 4T closes activating the pump and shifter solenoid. The solenoid engages the clutch while simultaneously releasing the brake band around the drive tube drum. As the water pumps out the pressure switch resets closing RO. This is to assure the machine does not go into spin with a full tub of water as there is no clutch or belt to slip to take the strain off the motor. Once empty, 8B closes energizing VM directly putting the tub into spin.
It is possible to configure the control such that when 8B is closed, the back feed into terminal motor control VM activates a timer and relay which makes and breaks continuity between MR and BR/RR- a gradual spin ramp up sequence the lasts 1 to 2 minutes and then terminates allowing full uninterrupted spinning.
This ramp up sequence can reduce the risk off balance tub banging and be used on the start of the normal ECO to saturate clothes. On the start of the normal ECO bypass 2T can be closed allowing a 1 minute timed increment or a 2 or 3 minute increment(s) with a sub interval 8B. As the machine fills for the first minute or more, the motor control (or even timer if SI) pulse spins the motor. This saturates all the clothes and has them fall to the bottom. The timer advances out of the spin & wet increment into a 1 minute timed fill only to lead the timer out of the first- making sure that a condition of both 4B and 8B closed can not take place. The timer advances into a new increment where the Bypass opens and the machine is allowed to fill until the pressure switch is satisfied. The catch is that on the normal eco cycle a different pressure switch is used allowing only a 1/10 tub fill- for the other cycles it is shunted out.
The eco cycle continues like the others- and for rinsing a series of spay rinses is used.
It is possible that one could add a 3B or 3T terminal and another lead to the motor control that does slow speed agitation- good for delicates and the normal eco due to the reduced fill.
I think if Speed Queen had gone this route it would have been a win-win for everyone.
The difference is that they use use a splutch and brake band which allows for driving the agitator independently of the tub- no lid lock- and no indexing. Most of the timing is done via an electronical timer as well. Nothing fancy and no error codes.
