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| Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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50 hz timer motor
A few years ago, when there were no tumblers availabe yet in the US
market, I had imported a French-made washing machine (Brandt) to the US for energy and space-saving purposes. The machine was designed to work in 220V/50hz and N. America has 110V/60hz. And as a mechanical engineer, I was naive to think that as long as I had a 220V outlet in my house, the worst scenario would only be that the machine runs a little faster (20%) which amounts to 24 minutes in a 120-min wash cycle. Well, as it turned out, the machine runs a lot faster. The timing knob finished a 120-min cycle in something like 6 minutes. The wash, drain, rinse and spin all were cut short within each function. To this day, I am still puzzled and not able to solve the problem. If anyone could shed any light on this subject, I would greatly appreciate it. The only other possible cause would be a defective timer which could have been assembled with fewer gear sets than ought to be. But without knowing for sure the root of the problem, it doesn't make sense for me to invest another $100 to buy a timer from oversea with no English service manual available. |
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#2
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50 hz timer motor
wrote in message ups.com... A few years ago, when there were no tumblers availabe yet in the US market, I had imported a French-made washing machine (Brandt) to the US for energy and space-saving purposes. The machine was designed to work in 220V/50hz and N. America has 110V/60hz. And as a mechanical engineer, I was naive to think that as long as I had a 220V outlet in my house, the worst scenario would only be that the machine runs a little faster (20%) which amounts to 24 minutes in a 120-min wash cycle. Well, as it turned out, the machine runs a lot faster. The timing knob finished a 120-min cycle in something like 6 minutes. The wash, drain, rinse and spin all were cut short within each function. To this day, I am still puzzled and not able to solve the problem. If anyone could shed any light on this subject, I would greatly appreciate it. The only other possible cause would be a defective timer which could have been assembled with fewer gear sets than ought to be. But without knowing for sure the root of the problem, it doesn't make sense for me to invest another $100 to buy a timer from oversea with no English service manual available. I may be wrong, but I can't believe the difference in frequency could make that much difference in time. |
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#3
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50 hz timer motor
"oldfogie" writes:
wrote in message ups.com... A few years ago, when there were no tumblers availabe yet in the US market, I had imported a French-made washing machine (Brandt) to the US for energy and space-saving purposes. The machine was designed to work in 220V/50hz and N. America has 110V/60hz. And as a mechanical engineer, I was naive to think that as long as I had a 220V outlet in my house, the worst scenario would only be that the machine runs a little faster (20%) which amounts to 24 minutes in a 120-min wash cycle. Well, as it turned out, the machine runs a lot faster. The timing knob finished a 120-min cycle in something like 6 minutes. The wash, drain, rinse and spin all were cut short within each function. To this day, I am still puzzled and not able to solve the problem. If anyone could shed any light on this subject, I would greatly appreciate it. The only other possible cause would be a defective timer which could have been assembled with fewer gear sets than ought to be. But without knowing for sure the root of the problem, it doesn't make sense for me to invest another $100 to buy a timer from oversea with no English service manual available. I may be wrong, but I can't believe the difference in frequency could make that much difference in time. OK, we now have a schematic in English if anyone is still awake on this issue: http://repairfaq.cis.upenn.edu/Misc/tmp/sch_eng.pdf It lookse like there is a signal to start the timer (page 4) and my guess is that due to either something being broken or the 60/50 Hz issue, the timer is overshooting where it should stop and so isn't waiting for the Start signal. Of course, all the magic happens in the "Module".   --- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/ Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/ +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm | Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html Important: Anything sent to the email address in the message header above is ignored unless my full name is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. |
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#4
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50 hz timer motor
Sam Goldwasser wrote:
"oldfogie" writes: wrote in message roups.com... A few years ago, when there were no tumblers availabe yet in the US market, I had imported a French-made washing machine (Brandt) to the US for energy and space-saving purposes. The machine was designed to work in 220V/50hz and N. America has 110V/60hz. And as a mechanical engineer, I was naive to think that as long as I had a 220V outlet in my house, the worst scenario would only be that the machine runs a little faster (20%) which amounts to 24 minutes in a 120-min wash cycle. Well, as it turned out, the machine runs a lot faster. The timing knob finished a 120-min cycle in something like 6 minutes. The wash, drain, rinse and spin all were cut short within each function. To this day, I am still puzzled and not able to solve the problem. If anyone could shed any light on this subject, I would greatly appreciate it. The only other possible cause would be a defective timer which could have been assembled with fewer gear sets than ought to be. But without knowing for sure the root of the problem, it doesn't make sense for me to invest another $100 to buy a timer from oversea with no English service manual available. I may be wrong, but I can't believe the difference in frequency could make that much difference in time. OK, we now have a schematic in English if anyone is still awake on this issue: http://repairfaq.cis.upenn.edu/Misc/tmp/sch_eng.pdf It lookse like there is a signal to start the timer (page 4) and my guess is that due to either something being broken or the 60/50 Hz issue, the timer is overshooting where it should stop and so isn't waiting for the Start signal. Of course, all the magic happens in the "Module". There appears to be no solenoid connections on the timer, which would indicate that it`s an 'italian type' which is at odds with the machine seeming to be a variable temperature machine - on a variable temp machine, during the heat pause, the timer main cam is knocked out of gear by a solenoid operated by the module, so that the sub cam which controls the main motor direction still turns. the solenoid drops out when the wash water reaches a certain temp, then the rest of the heating cycle is governed by the time it takes the main cam to move on to it`s next position I suspect it`s a mechanical timer and there is a problem with the pawls between the two cam barrels ( my terminology may differ from yours) If the timer has a thin card or plastic cover on top, it can usually be easily levered off to reveal the cams. If both cams revolve together all the time, the pawl mechanism which causes the intermittent drive of the front cam is jammed. Some use a maltese cross or 'Geneva Drive' for this action. Ron -- Lune Valley Audio Public address system Hire, Sales, Repairs www.lunevalleyaudio.com |
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#5
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50 hz timer motor
I just verified that the inner cam and the outer cam do not revovle
together all the time. It takes a number of revolutions of the inner cam to move the outer cam a knob forward. Separately, if the machine is designed to take in cold water and heat it up internally and the timer motor is expecting feed back signal from it, would it have caused the problem if the water hose inlet was taking in hot water directly since we generally have separate hot and cold water inlets in the US? But there should be a sensor inside the machine to detect water temperature anyway... Esther There appears to be no solenoid connections on the timer, which would indicate that it`s an 'italian type' which is at odds with the machine seeming to be a variable temperature machine - on a variable temp machine, during the heat pause, the timer main cam is knocked out of gear by a solenoid operated by the module, so that the sub cam which controls the main motor direction still turns. the solenoid drops out when the wash water reaches a certain temp, then the rest of the heating cycle is governed by the time it takes the main cam to move on to it`s next position I suspect it`s a mechanical timer and there is a problem with the pawls between the two cam barrels ( my terminology may differ from yours) If the timer has a thin card or plastic cover on top, it can usually be easily levered off to reveal the cams. If both cams revolve together all the time, the pawl mechanism which causes the intermittent drive of the front cam is jammed. Some use a maltese cross or 'Geneva Drive' for this action. Ron -- Lune Valley Audio Public address system Hire, Sales, Repairs www.lunevalleyaudio.com |
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#6
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50 hz timer motor
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#8
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50 hz timer motor
I now have the timer mechanism in my possesion.
There is a synchronous motor which drives 4 gears as follows: Driven Drive Shaft Teeth Teeth Gear:Gear Ratio Period (60Hz) ------------------------------------------------------------------------------ Motor 12 Motor:G1 12:50 1:4.17 15 Hz G1 50 16 G1:G2 16:40 1:2.5 3.6 Hz G2 40 10 G2:G3 10:45 1:4.5 1.44 Hz G3 45 12 G3:G4 12:48 1:4 0.32 Hz G4 48 0.08 Hz (12.5 s) Gear G4 engages the inside of a funny large ring gear - it has teath missing every 12th position. Every 12.5 s, the cam switch moves one position. However, there is a lever in the middle of the mechanism which seems to be wanting to engage something that isn't there. When that lever is prevented from moving a certain way, the main cam doesn't step. However, I can't quite see what it's really doing without further disassembly. So, is it possible there is some escapement that is missing on this unit? There are at least two posts that look like they may be for additional gears or something but that's not conclusive. Perhaps the original theory that something is missing deserves more consideration. One thing I'm quite sure of is that the 50/60 Hz thing is irrelevant as far as this mechanism is concerned. The motor feels like it has around the 8 poles required to account for the 15 rps speed at which it is running (at 60 Hz). --- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/ Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/ +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm | Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html Important: Anything sent to the email address in the message header above is ignored unless my full name is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. wrote in message ups.com... A few years ago, when there were no tumblers availabe yet in the US market, I had imported a French-made washing machine (Brandt) to the US for energy and space-saving purposes. The machine was designed to work in 220V/50hz and N. America has 110V/60hz. And as a mechanical engineer, I was naive to think that as long as I had a 220V outlet in my house, the worst scenario would only be that the machine runs a little faster (20%) which amounts to 24 minutes in a 120-min wash cycle. Well, as it turned out, the machine runs a lot faster. The timing knob finished a 120-min cycle in something like 6 minutes. The wash, drain, rinse and spin all were cut short within each function. To this day, I am still puzzled and not able to solve the problem. If anyone could shed any light on this subject, I would greatly appreciate it. The only other possible cause would be a defective timer which could have been assembled with fewer gear sets than ought to be. But without knowing for sure the root of the problem, it doesn't make sense for me to invest another $100 to buy a timer from oversea with no English service manual available. I may be wrong, but I can't believe the difference in frequency could make that much difference in time. |
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#9
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50 hz timer motor
Sam Goldwasser wrote:
I now have the timer mechanism in my possesion. There is a synchronous motor which drives 4 gears as follows: Driven Drive Shaft Teeth Teeth Gear:Gear Ratio Period (60Hz) ------------------------------------------------------------------------------ Motor 12 Motor:G1 12:50 1:4.17 15 Hz G1 50 16 G1:G2 16:40 1:2.5 3.6 Hz G2 40 10 G2:G3 10:45 1:4.5 1.44 Hz G3 45 12 G3:G4 12:48 1:4 0.32 Hz G4 48 0.08 Hz (12.5 s) Gear G4 engages the inside of a funny large ring gear - it has teath missing every 12th position. Every 12.5 s, the cam switch moves one position. However, there is a lever in the middle of the mechanism which seems to be wanting to engage something that isn't there. When that lever is prevented from moving a certain way, the main cam doesn't step. However, I can't quite see what it's really doing without further disassembly. So, is it possible there is some escapement that is missing on this unit? There are at least two posts that look like they may be for additional gears or something but that's not conclusive. Perhaps the original theory that something is missing deserves more consideration. One thing I'm quite sure of is that the 50/60 Hz thing is irrelevant as far as this mechanism is concerned. The motor feels like it has around the 8 poles required to account for the 15 rps speed at which it is running (at 60 Hz). --- sam Sam, there`s usually a kind of 'rocking lever' a bit like a clock escapement. It`s dificult to see where any parts could go missing to unless it`s been 'got at' previously. Ron (UK) -- Lune Valley Audio Public address system Hire, Sales, Repairs www.lunevalleyaudio.com |
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#10
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50 hz timer motor
Ron(UK) wrote:
Sam Goldwasser wrote: I now have the timer mechanism in my possesion. There is a synchronous motor which drives 4 gears as follows: Driven Drive Shaft Teeth Teeth Gear:Gear Ratio Period (60Hz) ------------------------------------------------------------------------------ Motor 12 Motor:G1 12:50 1:4.17 15 Hz G1 50 16 G1:G2 16:40 1:2.5 3.6 Hz G2 40 10 G2:G3 10:45 1:4.5 1.44 Hz G3 45 12 G3:G4 12:48 1:4 0.32 Hz G4 48 0.08 Hz (12.5 s) Gear G4 engages the inside of a funny large ring gear - it has teath missing every 12th position. Every 12.5 s, the cam switch moves one position. However, there is a lever in the middle of the mechanism which seems to be wanting to engage something that isn't there. When that lever is prevented from moving a certain way, the main cam doesn't step. However, I can't quite see what it's really doing without further disassembly. So, is it possible there is some escapement that is missing on this unit? There are at least two posts that look like they may be for additional gears or something but that's not conclusive. Perhaps the original theory that something is missing deserves more consideration. One thing I'm quite sure of is that the 50/60 Hz thing is irrelevant as far as this mechanism is concerned. The motor feels like it has around the 8 poles required to account for the 15 rps speed at which it is running (at 60 Hz). --- sam Sam, there`s usually a kind of 'rocking lever' a bit like a clock escapement. It`s dificult to see where any parts could go missing to unless it`s been 'got at' previously. Ron (UK) Further to my last post, some timers - we call them the Italian type - have a lever external to the cam barrels, which is operated by the rear cam and interupts the connection to the front cams at certain parts of the program. It`s usually on a rod which runs from front to back of the timer and has a 'flag' that fits in between the front and rear cams. If this timer has that arrangment, perhaps it`s seized up in some way. Ron -- Lune Valley Audio Public address system Hire, Sales, Repairs www.lunevalleyaudio.com |
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#11
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50 hz timer motor
"Ron(UK)" writes:
Sam Goldwasser wrote: I now have the timer mechanism in my possesion. There is a synchronous motor which drives 4 gears as follows: Driven Drive Shaft Teeth Teeth Gear:Gear Ratio Period (60Hz) ------------------------------------------------------------------------------ Motor 12 Motor:G1 12:50 1:4.17 15 Hz G1 50 16 G1:G2 16:40 1:2.5 3.6 Hz G2 40 10 G2:G3 10:45 1:4.5 1.44 Hz G3 45 12 G3:G4 12:48 1:4 0.32 Hz G4 48 0.08 Hz (12.5 s) Gear G4 engages the inside of a funny large ring gear - it has teath missing every 12th position. Every 12.5 s, the cam switch moves one position. However, there is a lever in the middle of the mechanism which seems to be wanting to engage something that isn't there. When that lever is prevented from moving a certain way, the main cam doesn't step. However, I can't quite see what it's really doing without further disassembly. So, is it possible there is some escapement that is missing on this unit? There are at least two posts that look like they may be for additional gears or something but that's not conclusive. Perhaps the original theory that something is missing deserves more consideration. One thing I'm quite sure of is that the 50/60 Hz thing is irrelevant as far as this mechanism is concerned. The motor feels like it has around the 8 poles required to account for the 15 rps speed at which it is running (at 60 Hz). --- sam Sam, there`s usually a kind of 'rocking lever' a bit like a clock escapement. It`s dificult to see where any parts could go missing to unless it`s been 'got at' previously. Here's a photo. Sorry about the quality: http://repairfaq.cis.upenn.edu/Misc/tmp/gears.jpg Just above the center hub, there is a white nylon tab sticking out, which is part of a lever that's mostly hidden behind the black plate. That's the lever I'm talking about. Now, it could just be sn indicator to show what's going on but it could also be part of some type of escapement. There are also a post visible on either side of the white tab which are different than the other posts used to just key the top. They could be for missing parts (or optional parts). The blue ring gear just visible through the window is moved by the final white gear - there is a mating gear on the other side of the black plate. The blue ring gear rotates freely inside the cam cylinder, but also cycles the position of the lever. When the lever moves into a certain position, it engages the cam cylinder and causes it to move by one click. Limiting the travel of the lever prevents this movement. What would make the most sense is that there is something missing that's supposed to do every 4th rotation of the final white gear to move the cam. That would be one minute at 50 Hz. Isn't there anyone at the French company who can answer the simple question as to whether just powering the timer should cause the cam to move in 1 minute increments? Don't confuse them with 50/60 Hz! Thanks. --- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/ Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/ +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm | Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html Important: Anything sent to the email address in the message header above is ignored unless my full name is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. |
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#12
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50 hz timer motor
Sam Goldwasser wrote:
Here's a photo. Sorry about the quality: http://repairfaq.cis.upenn.edu/Misc/tmp/gears.jpg Just above the center hub, there is a white nylon tab sticking out, which is part of a lever that's mostly hidden behind the black plate. That's the lever I'm talking about. Now, it could just be sn indicator to show what's going on but it could also be part of some type of escapement. There are also a post visible on either side of the white tab which are different than the other posts used to just key the top. They could be for missing parts (or optional parts). The blue ring gear just visible through the window is moved by the final white gear - there is a mating gear on the other side of the black plate. The blue ring gear rotates freely inside the cam cylinder, but also cycles the position of the lever. When the lever moves into a certain position, it engages the cam cylinder and causes it to move by one click. Limiting the travel of the lever prevents this movement. What would make the most sense is that there is something missing that's supposed to do every 4th rotation of the final white gear to move the cam. That would be one minute at 50 Hz. Isn't there anyone at the French company who can answer the simple question as to whether just powering the timer should cause the cam to move in 1 minute increments? Don't confuse them with 50/60 Hz! Thanks. What do the two white wires go to? a pair of contacts, or a coil? Ron -- Lune Valley Audio Public address system Hire, Sales, Repairs www.lunevalleyaudio.com |
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#13
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50 hz timer motor
Isn't there anyone at the French company who can answer the simple question as to whether just powering the timer should cause the cam to move in 1 minute increments? Don't confuse them with 50/60 Hz! Well if all else fails I've got a friend in the UK who I'm sure would be happy to try the darn thing on 50 Hz if it was sent over there. I'd say it's pretty safe to assume the timer is bad though, a part could have been manufactured with a crack in it and broken apart in shipping. |
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#14
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50 hz timer motor
My bet is that the timer is OK. The washer has a quick wash feature
button and further is supposed to be energy efficient. I bet the timer is turned on and off by a separate master timer, the interval of which is determined by demand. I think the technology is fooling the original poster. Joe Sam Goldwasser wrote: "Ron(UK)" writes: Sam Goldwasser wrote: I now have the timer mechanism in my possesion. There is a synchronous motor which drives 4 gears as follows: Driven Drive Shaft Teeth Teeth Gear:Gear Ratio Period (60Hz) ------------------------------------------------------------------------------ Motor 12 Motor:G1 12:50 1:4.17 15 Hz G1 50 16 G1:G2 16:40 1:2.5 3.6 Hz G2 40 10 G2:G3 10:45 1:4.5 1.44 Hz G3 45 12 G3:G4 12:48 1:4 0.32 Hz G4 48 0.08 Hz (12.5 s) Gear G4 engages the inside of a funny large ring gear - it has teath missing every 12th position. Every 12.5 s, the cam switch moves one position. However, there is a lever in the middle of the mechanism which seems to be wanting to engage something that isn't there. When that lever is prevented from moving a certain way, the main cam doesn't step. However, I can't quite see what it's really doing without further disassembly. So, is it possible there is some escapement that is missing on this unit? There are at least two posts that look like they may be for additional gears or something but that's not conclusive. Perhaps the original theory that something is missing deserves more consideration. One thing I'm quite sure of is that the 50/60 Hz thing is irrelevant as far as this mechanism is concerned. The motor feels like it has around the 8 poles required to account for the 15 rps speed at which it is running (at 60 Hz). --- sam Sam, there`s usually a kind of 'rocking lever' a bit like a clock escapement. It`s dificult to see where any parts could go missing to unless it`s been 'got at' previously. Here's a photo. Sorry about the quality: http://repairfaq.cis.upenn.edu/Misc/tmp/gears.jpg Just above the center hub, there is a white nylon tab sticking out, which is part of a lever that's mostly hidden behind the black plate. That's the lever I'm talking about. Now, it could just be sn indicator to show what's going on but it could also be part of some type of escapement. There are also a post visible on either side of the white tab which are different than the other posts used to just key the top. They could be for missing parts (or optional parts). The blue ring gear just visible through the window is moved by the final white gear - there is a mating gear on the other side of the black plate. The blue ring gear rotates freely inside the cam cylinder, but also cycles the position of the lever. When the lever moves into a certain position, it engages the cam cylinder and causes it to move by one click. Limiting the travel of the lever prevents this movement. What would make the most sense is that there is something missing that's supposed to do every 4th rotation of the final white gear to move the cam. That would be one minute at 50 Hz. Isn't there anyone at the French company who can answer the simple question as to whether just powering the timer should cause the cam to move in 1 minute increments? Don't confuse them with 50/60 Hz! Thanks. --- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/ Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/ +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm | Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html Important: Anything sent to the email address in the message header above is ignored unless my full name is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. -- Joe Leikhim K4SAT "The RFI-EMI-GUY" "Follow The Money" |
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#15
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50 hz timer motor
Sam,
On page 4 of the English schematics I sent you which details the timer sequence, at the bottom left, there are some faded word that says 1T/60 sec, i.e. 1 turn/min. Would that answer your question in regards to whether the cam moves in 1 minute increments? Furthermore, I think that each square there represents 5 minutes. If I added up all the squares for the first program which includes the pre-wash, it'll amount to 135 minutes which is very close to the user manual that indicates 2 hours 35 minutes, considering the water-fill time, repeated rinse and drain. I assume the 135 minutes would be the actual drum-turning time. |
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#16
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50 hz timer motor
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#17
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50 hz timer motor
James Sweet writes:
wrote: A few years ago, when there were no tumblers availabe yet in the US market, I had imported a French-made washing machine (Brandt) to the US for energy and space-saving purposes. The machine was designed to work in 220V/50hz and N. America has 110V/60hz. And as a mechanical engineer, I was naive to think that as long as I had a 220V outlet in my house, the worst scenario would only be that the machine runs a little faster (20%) which amounts to 24 minutes in a 120-min wash cycle. Well, as it turned out, the machine runs a lot faster. The timing knob finished a 120-min cycle in something like 6 minutes. The wash, drain, rinse and spin all were cut short within each function. To this day, I am still puzzled and not able to solve the problem. If anyone could shed any light on this subject, I would greatly appreciate it. That's bizarre, does the timer use a normal syncronous motor? Either way that part draws so little current that you could very easily make a little frequency converter, all you need is an oscillator that runs at 60Hz, a couple of mosfets and some glue components. I have been in email contact. My guess is either that the motor is indeed defective (unlikely) or that the machine is supposed to move from one state to the next quickly, but should then hold in each state awaiting a completion signal and for some reason, that part of the circuit doesn't like 60 Hz. Unfortunately, the schematic is in French: http://repairfaq.cis.upenn.edu/Misc/tmp/SFX70.pdf From what I can decipher, the timer uses a normal synchronous motor. --- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/ Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/ +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm | Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html Important: Anything sent to the email address in the message header above is ignored unless my full name is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. |
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#18
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50 hz timer motor
wrote:
A few years ago, when there were no tumblers availabe yet in the US market, I had imported a French-made washing machine (Brandt) to the US for energy and space-saving purposes. The machine was designed to work in 220V/50hz and N. America has 110V/60hz. And as a mechanical engineer, I was naive to think that as long as I had a 220V outlet in my house, the worst scenario would only be that the machine runs a little faster (20%) which amounts to 24 minutes in a 120-min wash cycle. Well, as it turned out, the machine runs a lot faster. The timing knob finished a 120-min cycle in something like 6 minutes. The wash, drain, rinse and spin all were cut short within each function. To this day, I am still puzzled and not able to solve the problem. If anyone could shed any light on this subject, I would greatly appreciate it. The only other possible cause would be a defective timer which could have been assembled with fewer gear sets than ought to be. But without knowing for sure the root of the problem, it doesn't make sense for me to invest another $100 to buy a timer from oversea with no English service manual available. A possibility is that the timer has developed a fault in that the gear set in the timer is somehow sticking. Most washing machine timers have a sytem where the main cam increments one notch for every so many revolutions of the timer motor. You might notice two 'barrels' inside, the rear one turning continously and the other clicking round once every revolution of the rear barrel. The rear barrel controls the main motor, and the front barrel the fill valves, drain pump and heater. Some machines have a solenoid which kicks the front barrel out of gear for certain parts of the wash - heat pause etc. This solenoid is controlled by a triac on the control module, maybe that`s where the problem lies. A continuously buzzing solenoid usually means a faulty module. I,ve seen timers that clicked through in minutes because the little planet gears were gummed up with deteriorating grease. Hth Ron(UK) -- Lune Valley Audio Public address system Hire, Sales, Repairs www.lunevalleyaudio.com |
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#19
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50 hz timer motor
If the machine is useless anyway, disassemble the timer and
watch it run on 60 HZ. At least you'll get a clue as to why it's going so fast. wrote: Well, as it turned out, the machine runs a lot faster. The timing knob finished a 120-min cycle in something like 6 minutes. The wash, drain, rinse and spin all were cut short within each function. To this day, I am still puzzled and not able to solve the problem. If anyone could shed any light on this subject, I would greatly appreciate it. |
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Hybrid Mode
