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Micro switch, switch size.
This is the lock switch of a DW New World dishwasher.
When the door is closed it wont operate, I have identified the problem being that the micro switch isnt being `switched on` due to either the micro switch or the operating cam is worn. If I can increase the size of the red switch (see image) or the cam then it should be DIYable. Any ideas on what I could use to increase the size of either, I do have some epoxy stuff and also hot glue (gun), I reckon if I can add 1mm would it be enough to sort it. Any suggestions. https://imgur.com/qoN4ygX |
Micro switch, switch size.
On Tue, 12 Mar 2019 19:21:44 +0000
ss wrote: Any ideas on what I could use to increase the size of either, I do have some epoxy stuff and also hot glue (gun), I reckon if I can add 1mm would it be enough to sort it. Any suggestions. https://imgur.com/qoN4ygX If you can get to the cam all the way around (I can't tell from the photo whether the top is clear of obstruction) then a bit of brass strip wrapped around it, soldered into a continuous band and with a solder blob where you need the extra throw (pressed on _after_ soldering :-). |
Micro switch, switch size.
ss wrote:
This is the lock switch of a DW New World dishwasher. When the door is closed it wont operate, I have identified the problem being that the micro switch isnt being `switched on` due to either the micro switch or the operating cam is worn. If I can increase the size of the red switch (see image) or the cam then it should be DIYable. Any ideas on what I could use to increase the size of either, I do have some epoxy stuff and also hot glue (gun), I reckon if I can add 1mm would it be enough to sort it. Any suggestions. https://imgur.com/qoN4ygX Hmm, Im sure you could bodge something but I would have thought that wear should be pretty negligible on a component like this and its more likely that the switch is faulty internally. Given that it looks like you can pop the micro switch out by splaying the clawed prongs, Id be tempted to pull it out and get a replacement. Its very unlikely to be specially designed for that machine and getting an identical replacement shouldnt be too difficult. Tim -- Please don't feed the trolls |
Micro switch, switch size.
On 12/03/2019 19:40, Tim+ wrote:
and its more likely that the switch is faulty internally No, when the door is in closed position I can press the red part of the microswitch and the dishwasher programme will start, the cam is just not pushing it down far enough. |
Micro switch, switch size.
On Tuesday, 12 March 2019 19:21:51 UTC, ss wrote:
This is the lock switch of a DW New World dishwasher. When the door is closed it wont operate, I have identified the problem being that the micro switch isnt being `switched on` due to either the micro switch or the operating cam is worn. If I can increase the size of the red switch (see image) or the cam then it should be DIYable. Any ideas on what I could use to increase the size of either, I do have some epoxy stuff and also hot glue (gun), I reckon if I can add 1mm would it be enough to sort it. Any suggestions. https://imgur.com/qoN4ygX bit of card. Sometimes a switch can be moved a little too. Fix card to the faulty part, the switch. |
Micro switch, switch size.
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Micro switch, switch size.
"ss" wrote in message ... This is the lock switch of a DW New World dishwasher. When the door is closed it wont operate, I have identified the problem being that the micro switch isnt being `switched on` due to either the micro switch or the operating cam is worn. If I can increase the size of the red switch (see image) or the cam then it should be DIYable. Any ideas on what I could use to increase the size of either, I do have some epoxy stuff and also hot glue (gun), I reckon if I can add 1mm would it be enough to sort it. Any suggestions. Replace the cam. I can't see that anything added to either of them will last for long. Sugru might with the cam. https://imgur.com/qoN4ygX |
Micro switch, switch size.
On 12/03/2019 19:43, ss wrote:
On 12/03/2019 19:40, Tim+ wrote: and its more likely that the switch is faulty internally No, when the door is in closed position I can press the red part of the microswitch and the dishwasher programme will start, the cam is just not pushing it down far enough. That could still be a fault in the switch though and a new one may not need to be pushed down so far. SteveW |
Micro switch, switch size.
"Steve Walker" wrote in message ... On 12/03/2019 19:43, ss wrote: On 12/03/2019 19:40, Tim+ wrote: and its more likely that the switch is faulty internally No, when the door is in closed position I can press the red part of the microswitch and the dishwasher programme will start, the cam is just not pushing it down far enough. That could still be a fault in the switch though and a new one may not need to be pushed down so far. Not very likely tho. Much more likely its a worn cam. |
Micro switch, switch size.
ss wrote:
On 12/03/2019 19:40, Tim+ wrote: and its more likely that the switch is faulty internally No, when the door is in closed position I can press the red part of the microswitch and the dishwasher programme will start, the cam is just not pushing it down far enough. So why isnt it pushing it down far enough now? As I said, unless theres obvious wear somewhere, the fault could lie in the switch (requiring more movement to make it do its stuff). Tim -- Please don't feed the trolls |
Micro switch, switch size.
On 12/03/2019 19:51, ss wrote:
On 12/03/2019 19:47, wrote: bit of card. Sometimes a switch can be moved a little too. Fix card to the faulty part, the switch. That could work by taking the switch off and reseating with a piece of card under it to raise it slightly, worth a try. That appears to have worked, a couple of pieces of thick paper under the microswitch. See image. https://imgur.com/wPpPyjO |
Micro switch, switch size.
On 12/03/2019 21:10, ss wrote:
On 12/03/2019 19:51, ss wrote: On 12/03/2019 19:47, wrote: bit of card. Sometimes a switch can be moved a little too. Fix card to the faulty part, the switch. That could work by taking the switch off and reseating with a piece of card under it to raise it slightly, worth a try. That appears to have worked, a couple of pieces of thick paper under the microswitch. See image. https://imgur.com/wPpPyjO I would use a strip of plastic, say cut from an old credit card, rather than paper. |
Micro switch, switch size.
On 12/03/2019 19:43, ss wrote:
On 12/03/2019 19:40, Tim+ wrote: and its more likely that the switch is faulty internally No, when the door is in closed position I can press the red part of the microswitch and the dishwasher programme will start, the cam is just not pushing it down far enough. Has the switch just slid back due to wear or springiness of the white receptacle becoming relaxed with age - there seems to be a gap on the left hand front edge? Wedge a piece of plastic at the back to move the whole switch forward. -- mailto : news {at} admac {dot} myzen {dot} co {dot} uk |
Micro switch, switch size.
On 12/03/2019 22:18, dennis@home wrote:
I would use a strip of plastic, say cut from an old credit card, rather than paper. Yes I agree, I have put it back together with the paper but the paper will probably compress after a while and then I will replace with a strip of plastic. |
Micro switch, switch size.
ss wrote:
This is the lock switch of a DW New World dishwasher. When the door is closed it wont operate, I have identified the problem being that the micro switch isnt being `switched on` due to either the micro switch or the operating cam is worn. If I can increase the size of the red switch (see image) or the cam then it should be DIYable. Any ideas on what I could use to increase the size of either, I do have some epoxy stuff and also hot glue (gun), I reckon if I can add 1mm would it be enough to sort it. Any suggestions. https://imgur.com/qoN4ygX Unfortunately it is more likely to be wear on the internal contacts than on the actuator, and it may soon fail completely. If they are not too expensive it may be better to get a new switch. -- Roger Hayter |
Micro switch, switch size.
On 12/03/2019 23:48, Roger Hayter wrote:
Unfortunately it is more likely to be wear on the internal contacts than on the actuator, and it may soon fail completely. If they are not too expensive it may be better to get a new switch. Yes no doubt something will fail eventually, it was in the house when we moved in and I reckon its around 12 years old, a new one is due according to management but not before I DIY it as much as possible.I can probably get a new switch for around Β£15 if necessary. |
Micro switch, switch size.
ss wrote:
On 12/03/2019 23:48, Roger Hayter wrote: Unfortunately it is more likely to be wear on the internal contacts than on the actuator, and it may soon fail completely. If they are not too expensive it may be better to get a new switch. Yes no doubt something will fail eventually, it was in the house when we moved in and I reckon its around 12 years old, a new one is due according to management but not before I DIY it as much as possible.I can probably get a new switch for around £15 if necessary. If it's a standard type of microswitch it will be a tenth of that on Radiospares or Ebay. -- Roger Hayter |
Micro switch, switch size.
Tim+ was thinking very hard :
Its very unlikely to be specially designed for that machine and getting an identical replacement shouldnt be too difficult. Tim It is a standard unit, can be had for a few pence. There will be a model number on the switch, so easy to look up for a replacement. |
Micro switch, switch size.
ss wrote :
Yes no doubt something will fail eventually, it was in the house when we moved in and I reckon its around 12 years old, a new one is due according to management but not before I DIY it as much as possible.I can probably get a new switch for around £15 if necessary. £1.50 tops.. |
Micro switch, switch size.
On 13/03/2019 08:59, Harry Bloomfield wrote:
ss wrote : Yes no doubt something will fail eventually, it was in the house when we moved in and I reckon its around 12 years old, a new one is due according to management but not before I DIY it as much as possible.I can probably get a new switch for around £15 if necessary. £1.50 tops.. Yes but for the micro switch but the complete lock mechanism I can get for under £15 so would probably buy that if it fails again. After closer inspection I think what has happened is that over time the `axle` that the cam is on has bent slightly as there is a strong pull with a spring on that part and thats what is causing the contact issue between cam and micro switch. |
Micro switch, switch size.
On 13/03/2019 08:59, Harry Bloomfield wrote:
ss wrote : Yes no doubt something will fail eventually, it was in the house when we moved in and I reckon its around 12 years old, a new one is due according to management but not before I DIY it as much as possible.I can probably get a new switch for around £15 if necessary. £1.50 tops.. Yes for the micro switch but the complete lock mechanism I can get for under £15 so would probably buy that if it fails again. After closer inspection I think what has happened is that over time the `axle` that the cam is on has bent or worn slightly as there is a strong pull with a spring on that part and thats what is causing the contact issue between cam and micro switch. (see image) https://imgur.com/rjnU8Mn |
Micro switch, switch size.
ss wrote:
On 13/03/2019 08:59, Harry Bloomfield wrote: ss wrote : Yes no doubt something will fail eventually, it was in the house when we moved in and I reckon its around 12 years old, a new one is due according to management but not before I DIY it as much as possible.I can probably get a new switch for around £15 if necessary. £1.50 tops.. Yes for the micro switch but the complete lock mechanism I can get for under £15 so would probably buy that if it fails again. After closer inspection I think what has happened is that over time the `axle` that the cam is on has bent or worn slightly as there is a strong pull with a spring on that part and thats what is causing the contact issue between cam and micro switch. (see image) https://imgur.com/rjnU8Mn I'd still try a new microswitch first. Their operating point does move a lot as the contacts wear. -- Roger Hayter |
Micro switch, switch size.
On Tuesday, 12 March 2019 22:44:16 UTC, ss wrote:
On 12/03/2019 22:18, dennis@home wrote: I would use a strip of plastic, say cut from an old credit card, rather than paper. Yes I agree, I have put it back together with the paper but the paper will probably compress after a while and then I will replace with a strip of plastic. Card doesn't compress over time IME. Plastic is slippery & more prone to fall out, and not as easy to work with. Card is very handy for all sorts of little mechanical fixes. NT |
Micro switch, switch size.
On 13/03/2019 09:54, Roger Hayter wrote:
I'd still try a new microswitch first. Their operating point does move a lot as the contacts wear. No. it doesn't. If you look at how they work, it is a matter of levers within the thing whose actions are more about where the button sits on the arm and the arm length than where the contact is https://www.components.omron.com/web...tch/basic02-01 what wears, is not the contact, but the actual BUTTON. -- It is dangerous to be right in matters on which the established authorities are wrong. Voltaire, The Age of Louis XIV |
Micro switch, switch size.
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Micro switch, switch size.
On Wednesday, 13 March 2019 13:12:15 UTC, dennis@home wrote:
On 13/03/2019 11:23, tabbypurr wrote: On Tuesday, 12 March 2019 22:44:16 UTC, ss wrote: On 12/03/2019 22:18, dennis@home wrote: I would use a strip of plastic, say cut from an old credit card, rather than paper. Yes I agree, I have put it back together with the paper but the paper will probably compress after a while and then I will replace with a strip of plastic. Card doesn't compress over time IME. Plastic is slippery & more prone to fall out, and not as easy to work with. Card is very handy for all sorts of little mechanical fixes. NT Its a dishwasher, its likely to be damp. If the electrical connections are damp, something has gone wrong. Card does have a bit of tolerance to damp. I wouldn't worry about it. NT |
Micro switch, switch size.
wrote in message ... On Tuesday, 12 March 2019 22:44:16 UTC, ss wrote: On 12/03/2019 22:18, dennis@home wrote: I would use a strip of plastic, say cut from an old credit card, rather than paper. Yes I agree, I have put it back together with the paper but the paper will probably compress after a while and then I will replace with a strip of plastic. Card doesn't compress over time IME. Plastic is slippery & more prone to fall out, Easy to add a little contact adhesive to stop that. and not as easy to work with. Even you should be able to manage to cut up an old credit card or food container. Card is very handy for all sorts of little mechanical fixes. Plastic lasts much longer. |
Micro switch, switch size.
The Natural Philosopher wrote:
On 13/03/2019 09:54, Roger Hayter wrote: I'd still try a new microswitch first. Their operating point does move a lot as the contacts wear. No. it doesn't. If you look at how they work, it is a matter of levers within the thing whose actions are more about where the button sits on the arm and the arm length than where the contact is https://www.components.omron.com/web...tch/basic02-01 what wears, is not the contact, but the actual BUTTON. If the actuator has a mechanical advantage (which it does to a degree dependent on the type of actuator) then wear at the contact will be magnified by that advantage. I recently replaced a microswitch (with one I had in stock since the early 1960s!) in the pressure switch in a Saniflow macerator and found the nylon button had to be depressed to nearly level with the case, while a new one moved about two mm. The button wasn't visibly worn. So, n of 1, I disagree. You may be right in other cases, my experience is limited. But contact wear or possibly bending little metal parts was certainly the cause in my case, not actuator wear. -- Roger Hayter |
Micro switch, switch size.
On 13/03/2019 18:35, Roger Hayter wrote:
The Natural Philosopher wrote: On 13/03/2019 09:54, Roger Hayter wrote: I'd still try a new microswitch first. Their operating point does move a lot as the contacts wear. No. it doesn't. If you look at how they work, it is a matter of levers within the thing whose actions are more about where the button sits on the arm and the arm length than where the contact is https://www.components.omron.com/web...tch/basic02-01 what wears, is not the contact, but the actual BUTTON. If the actuator has a mechanical advantage (which it does to a degree dependent on the type of actuator) then wear at the contact will be magnified by that advantage. You really havent a clue. Bye I recently replaced a microswitch (with one I had in stock since the early 1960s!) in the pressure switch in a Saniflow macerator and found the nylon button had to be depressed to nearly level with the case, while a new one moved about two mm. The button wasn't visibly worn. So, n of 1, I disagree. You may be right in other cases, my experience is limited. But contact wear or possibly bending little metal parts was certainly the cause in my case, not actuator wear. -- it should be clear by now to everyone that activist environmentalism (or environmental activism) is becoming a general ideology about humans, about their freedom, about the relationship between the individual and the state, and about the manipulation of people under the guise of a 'noble' idea. It is not an honest pursuit of 'sustainable development,' a matter of elementary environmental protection, or a search for rational mechanisms designed to achieve a healthy environment. Yet things do occur that make you shake your head and remind yourself that you live neither in Joseph Stalins Communist era, nor in the Orwellian utopia of 1984. Vaclav Klaus |
Lonely Psychopathic Senile Ozzie Troll Alert! LOL
On Wed, 13 Mar 2019 07:31:51 +1100, cantankerous trolling senile geezer Rot
Speed blabbered, again: Not very likely tho. Much more likely it’s a worn cam. I wonder why people don't simply ask YOU first when they start a thread. Don't you wonder too, senile Mr Know-it-all? -- Bod addressing abnormal senile quarreller Rot: "Do you practice arguing with yourself in an empty room?" MID: |
Lonely Psychopathic Senile Ozzie Troll Alert! LOL
On Thu, 14 Mar 2019 04:20:46 +1100, cantankerous trolling senile geezer Rot
Speed blabbered, again: Card doesn't compress over time IME. Plastic is slippery & more prone to fall out, Easy to add Difficult to make you shut your senile gob, senile Rot! -- FredXX to Rot Speed: "You are still an idiot and an embarrassment to your country. No wonder we shippe the likes of you out of the British Isles. Perhaps stupidity and criminality is inherited after all?" Message-ID: |
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