Quartz Clock Movement teardown
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- Опубліковано 14 кві 2018
- Today I took a look inside a cheap Chinese crystal controlled wall clock movement (mechanism) and found out how does it work.
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You're a godsent! I bought the exact same kind of clock mechanism to make it into a gift for someone but my curiosity got the better of me and I opened the back, and the gears went flying everywhere! Thanks for your help I was able to put it back together and get it working :)
My dad bought a nice wooden German wall clock with pandolium for the living room. After a few years, my mom got attached to it. But a loose screw caused the clock to fall on the floor. When I was visiting them, my mom complain that my dad didn't hammer the nail hard enough to the wall. Poor clock fell and all the gears went up to the kitchen. While cleaning the fridge, she found a few gears under the fridge. I went to a clock shop and asked for the cheapest clock with pandolium. The clerk was kind enough to tell me the difference between contious movement and the jaggy one. Contious movement uses a full electric motor and uses much more power. However, it is very quiet. To make the story short, I fixed the clock and put it up to the wall just before mother's day. She said that was the best mother's day gift she received! The movement was made in Japan. It's been twenty years and still working.
memories are great
great
Nice work bro 👍
Thats awesome 👏
*pendulum
First one of these I saw close up was in 1971 and it was already a few years old. It had no seconds hand, and it ran off an alkaline C cell that would last for a little more than a year. I wish I had it for comparison: possibly no integrated circuits, probably a CMOS counter to get the 8 Hz or 1Hz or whatever frequency from 32768. CMOS 4000-series chips showed up in 1968, so maybe...
I have a quartz controlled alarm clock with a backup battery. In eight years it’s gained 20 minutes because the crystal vibrates just a little too fast. So the clock gains about 0.4 seconds a day.
I always wondered how these clocks mechanisms works, very interesting!
Excellent, thank you for putting this up. Had an issue putting the coil back together and was able to see from the way you had it assembled how it should go together, even though a slightly different design. 10/10
my clocks hour hand is loose . it rotates easily what to do?
you use analog test gear very nicely your circuit analysis is amazing i love your videos very informative
Thank you! I've repaired my quartz clock thanks to your video.
What’s wrong when spindle motor not working. ( I have checked motor coil - it’s ok ). Magnet is not rotating. Any help? Thanks in advance.
One of the most original electronics channel on youtube.
Thanks for posting this! I needed to put mine back together, your video really helped.
I never thought our clock would run again. It does! You are a genius!!!
You've created a time machine at the end. 😀
he should add a digital camera to take pictures from the future...:))
I disassembled two of such mechanisms and managed to re-assemble both. The other one i managed to re-assemble was a radio-controlled mechanism, it took at least 8 takes to re-install all wheels in correct positions... But it still works well.
Is it possible to convert it to a ticking second hand...to reduce batt consumption?
I found this mega helpful and very informative, thanks for doing this video :)
Very interesting....will the clock still work if I disarmed the second hand to try and stop the clock ticking...as I have mine in my bedroom.
Hello, is it also possible to slow down quartz machine? Specifically to make the one day on clock last 365 days (1 year), so slow down about 365 times. Thank you!
this helped me put together a clock i made some years ago, the mechanism was rubbish, the battery had gone rusty. i decided the pull it apart, all the parts got mixed up. 0v built up crud on board connection. part axle slight bend. i fixed the minor problems. now works ok
Thank you! Awesome to see the inside of the clock!
Had one that, after around a decade of running, failed a funny way. The clock would move the second hand tick by tick as usual, but then at random points along the sweep the second hand would jump ahead 20-30 seconds per tick, probably because the little gearbox inside had worn out the pivots it ran on. Did a transplant of the clock mechanism from another cheap and nasty clock, and it lives again, keeping good time.
As to the "continuous movement" style, I am not a fan, because of the very short battery life. They typically last under 2 months per battery, while the single tick versions will go for around 2 years on a single alkaline cell. Took one that was otherwise a nice clock, but which ate a battery per month, and converted it to run off 12V DC from a solar panel, using a simple voltage regulator of a series resistor of around 4k7, a red LED as voltage regulator and a 1000uF capacitor to provide the current pulses for operation. then added some used SMD white LED's insode as illumination for the dial, and even with less than 0.5mA of current through them ( running through the series resistor so as to keep overall current the same with just the LED dropping a little of the voltage) they are way too bright, had to add a resistor of 5k6 across the LED's to dim them more, but still there is enough light from them to cast a shadow and light up the room with a night light after dark. Was a good recycle of an otherwise not usable clock.
That "funny failure mode" you describe happened to one of mine too.
A quality movement with continous motion will last many times more than that. If you buy crap, you can't complain.
hello very good video I would like to know if I put a duracell battery can it last longer?
Thank you very much for your demonstration and explanation! For example:- I have an old clock that did not function properly but it's frame, dial and hands are beautiful and so I am not willing to throw it out. In such a case I can buy a new quartz clock moment and replace the old moment of the clock by new moment so that the old clock will function as a new clock. I got such an Idea by watching the video. So that we can avoid throwing old dead clocks into garbage or by the side of road or street.
thank you sir you saved my bacon when a job i was working on due to deliver in an hr went wrong when the casing was opened and exploded all over my workbench!! cogs everywhere!! after finding your video its now working perfect again! THANKS!!
Hi sir,Love from India.
I have a doubt,if i intent to change the rotating direction of clock(meaning it will move anticlockwise) what changes should I make?
Thank you, this allowed me to fix the gears in my clock!
are u speaking or singing :D
02:36 Interesting about the counter-weight on the second hand... it gives the second hand a little gravity-boost when the pointer is going up on the left side of the clock's dial and a gravity-brake when the pointer is on the right side of the clock's dial.
1.5 mA power consumption, no wonder why my wall clock drains it's battery so quick, it has probably the same crappy motor!
By the way thanks for great video 👍
It doesn't draw 1.5mA continuously. The pulse duration is about 20 millisecond.
I had a similar movement that suddenly started to need a new cell every three or four months. I found that I had damaged (bent) the second hand shaft by pushing the second hand onto it too forcefully.
I learned so much about quartz movement. Thanks. BTW, can I just change the solenoid instead of replacing the whole unit because the stem size for my old Bulova is no where to be found. It is only 7mm long. Besides, i can reuse the original hands.
Well to be fair the listing clearly states "hands repair"... So I think it was pretty transparent that the hands were in less than perfect condition!
19:42 How you done that?? Directly connected to coil or connected to the place of the crystal??
The turbo clock at the end was great!
Nice video.
Saw the inside of the continues running second hand for the first time. Have explored the 'step type second hand' clock earlier.
Also be sure to pat the 🐈 when she appears on camera. She is nice and fluffy.
Is quartz crystal unit 32.768KHZ for every Quartz Clock ? How can I find out crystal for my clock?
The weak part of all those movements is the springy battery contacts, a little humidity is enough to corrode the pads on the PCB over the years.
I have an old non-quartz version which has a balance wheel movement powered by a couple of coils and a single transistor board, once it starts moving it can run off a calculator solar panel, it's also adjustable.
I also have several of those old clocks :). The mechanism is way more ineresting but also way less accurate. But i run them for the special ticking which is much more pleasing that the quartz ticking :).
My favourite video so far!
So how long does the battery last for that kind of mechanism??
Saludo desde VZLA en mi caso la el motor no enciende ya he revisado y no concigo falla en que me puedes orientar por favor?
*What is deffrient between the 1 second bit quartz and sweep movement quartz ,I mean it has the same mechanism then why this one sweeping and the another one stop bit 1 second?it's for the coil*??
Constant running clocks are silent, so they may be good if you have trouble sleeping because of clock ticking
Anybody who has trouble sleeping due to a clock ticking needs to learn how to go to bed when properly tired.
Max TheWinCat or you know, just buy a digital clock
Hi
How Can I Lower The Frequency Of Quartz Crystal Clock From 32768 kHz to 24500 kHz?
I Wanna Create And Measure Martian Time Which Is
24 Hours 39 Minutes
Thanks
Great help. I opened one to see if I could rob the longer spindle. That was a fail. But I am always inquisitive to see if I can fix things. Thanks to your demo, accompanied by your quaint narrative, I got it together and working again. Same day, I tried to reverse the swing of fridge doors, but no video showed how to dismantle the trim on the tops and bottoms glued to the door, where hand grips are. They would have to come off, because the doors have to be inverted, and then the hand grips are in the wrong place. I figured it can't be done, but I'd still like to dismantle so as to re-spray the doors so that there is no evidence of masking tape, overspread or gaps. Now I'm awaiting delivery of new door gaskets, which another installation video demonstrated.:)
I tested a quartz movement (with smooth sweeping second hand) that I bought online for $9 shipped. It draws 0.17 mA.
Hello how and where to buy this kind?
Thank you for your effort.
Easy to hear you love clocks. 😉👍
How ro know if switching transformer half shortred ?
1:12 I love your antique Mauthe. i have a triple chime colonial of zeeland grandfather clock. i would love to here the chimes (assuming its westminster chime) of your antique clock.
15:33 nice beat 👍.
Wow :) You bent space-time Continuum :D greetings from Poland :)
The only and best video on this subject on the internet, liked 👅
Excellent work truly amazing ... can u share me the circuit to speed up the clock speed
Good video that show it can do super-fast moving!
Great analyses. Very high battery usage for the continuous running motor (1.5 mA) The stepper motor clocks usually run for well over 1 year on the same battery.
upvote for vaccuum display. You are awesome. Love how you talk too.
Time flies when you're having fun....
I bought two of these cheap junks. They drain the battery in a month or two. The Walmart clocks run for years on a AA battery. One of my Walmart clocks died, was wondering if I could take the mechanism apart to fix it.
@80sGuy I am saying that the cheap movements on ebay run for a month or two on one AA battery. The cheap clocks that Walmart sells run for years before the AA battery needs changing. I know they are all made in China.
Great sir you have nicely explained 💖
Just out of curiosity, do you collect those mechanical clocks? Or do you have just that one?
I watch a lot of his videos, I can almost guarantee you that he has a somewhat sizable clock collection
Great your teaching videos and your funny Czenglish irony. TOP UA-camr!!
can you share me the circuit to speed up the clock
Just last week I resurrected one of those after being outside in the soil for five years.
Here’s my cat coming to help me...
Doesn’t help
Please upload a video which shows demonstrating and explaining about quartz clock moment with quarter chiming system.
I've used these types of movements and the batteries I find last give or take a year before they stop.
LMAO at the accent and the cat, I mean it in a nice way.
Você teria o circuito? Poderia me ceder? Muito obrigado
I have a cheap Chinese mechanism but it's old, sold like this it was £2.70 (probably £1.50 if bought direct) from a UK shop back in 1996.
It looks very similar but it's not see through, same text.
Same mounting but better plastic hands and has a buildt in Hook for wall mounting.
One rechargeable AA lasts 3 years. Same constant movement style.
Nice information sir salute
You just invented a time machine at the end of your video,right ! A few years ago I bought a battery operated Seiko wall clock that had a quiet mechanism like that one,the clock was $60.00. I shutter to think it might have had a .79 cent movement in it. It was for my mom ,but I know the battery lasted for more than 1 year in the clock I gave her.
I have some of these. The all seem to fail the same way. Over time It will stop spinning with the cover on, but spins fine when you take the cover off.
I’m always so fascinated by your quartz clock ⏰ motor videos. Once I find an old, or broken 😞 clock 🕰️ motor, I take it apart for the little magnet 🧲. I also find the copper copy coil fascinating 🧐. It is this copper 👮♀️ coil, which gives the magnetic 🧲 gear ⚙️ the impulse, each, EXACTLY one ☝️ second apart, enabling SUPERIOR time keeping ability, although, I do not know how this works. Sorry 😞 about all the emoji’s, and the long comment, but these videos are very interesting 🧐. Your friend, Jeff.
Hi, will you make a teardown of some old polish poduct? You're near Poland so I thing you have some device from this country :)
A decent sweep movement like the Young Town 12888 or SKP sweep is using less than 0.15 mA.
I just watched 20 minutes of video about a man learning how a tiny clock part works. Tiny but a little bit complicated.
Just Commenting ...and, loving it! (M. Smart)
This clock's mechanical system is actually very simple. Something like my quarter striking clock is way more complex.
Well for me its a little bit complicated. Beacause i dont know anything about mechanical stuff .lol
Muito bem explicado. Parabéns
wow, you make intersting also the simpliest thing, my compliments
Complete knowledge. Thanks for....
Thank for the video. Is it possible to add subtitles?
Thank you, I just fixed my cheap decorative clock. The minute only and one with seconds are different with ~ 3 - 4 more gears.
My dad used to make/repair clocks think he bought similar mechanisms. The ones he had you could see a tiny transistor next to the coil. Some of them are still working after 15 years or more
I also have several of those old 1-transistor clocks :). Not very accurate, but more interesting and having a nice sound.
If the frequency of the pulse is 8.00 Hz, then the period should be 125 ms instead of 120 ms as described in the video ???
Why this clock doesnt tick?? What differentiate it from a tick clock
Some quartz movements have 3 gears between the rotor and the second hand wheel.
Thanks, my clock is not running and keeping excellent time just from the help of the first 13 min. of your video.
How does this voltage doubler at 19:06 work?
When the ac is flowing left-to-right, it charges the cap, and when the ac switches to the other direction, the side of the cap connected to the LED is at -V instead of just 0. So the difference across the LED is V - (-V) = 2xV. Clever!
Current consumption should be approx 200 microamps / 0.2ma for a 5168S or 6168S movement. Check the current consumption with just the stepper motor installed to start with. I suspect binding in the gear train. A small drop of light watch oil in the bottom of each of the pivot holes will reduce friction, wear and noise. FYI, the SEIKO variant of this type of 'sweep seconds' movement from the 1980's suffered terribly from excessive wear to the motor bearing cups and second hand wheel rear pivot, causing the plastic to turn to white powder.
The current doesn't seem to change with the motor load. The problem is in the motor construction or in the driving method.
You're right, I just measured the current consumption on one of my sweep hand movements and it measured around 210 microamps. I was curious because I get at least 2 years of battery life if not much more. This particular movement is made by SKP in China.
@@tinylogic SKP movements are made by Seiko, and as the OP mentioned, Seiko's been making sweep mechanisms since the 1980s, so they know what they are doing.
This calc is amazing!
Thanks :) I identified it as PRIVILEG 825MD that was produced in 1975 for only 1 year.
Yes, and the C1-118 oscilloscope too (made in USSR ;). Especially its green line on the CRT screen...
Arnt you from praaag?
The continuous movement is hence not so popular, as it consumes more battery. If this clock is 8Hz motor frequency, the step movement will have a frequency of 1Hz. Also, the power consumption is equally less and hence step motor lasts for years.
Very Nice
The second hand of the clock is completely ruined, RIP 😔
Gracias por el video. Saludos desde Lima Perú.
I had a nice ladybug cooking timer, I took it apart to see the insides and couldn't put it back. Over the years I lost a few of the small parts.
Now whenever I see the ladybug shell I feel a pang of guilt :(
This comment I made me want to hug you and tell you it was all going to be OK. Lol
Try fixing it! Take apart other non cute timers like it and see exactly how they work! You might surprise yourself in being able to fix it… if not you've learned something and your ladybugs sacrifice will not have been in vain!
Haha! Yes, I do tend to be sentimental!
😸
Very interesting video
I bought one from a supermarket in Cyprus. Great for about 5 days then I noticed it was running about 10 minutes slow. That's why I'm on YOU TUBE looking to find out how to correct it anyone got any ideas .?
Czenglish hype
Hype!
The clock become crazy
Ahoj.
Dost strojků v obyčejným provedení a v provedení "SWEEP" (zkoumáš jej v tomhle videu) jsem rozebral a úspěšně složil. Dovolím si uvést pár poznatků ze svýho výzkumu:
Pohonným mechanizmem je krokový motorek - tzv. Lavetův motor. Tvarem pólových nádstavců je dán směr otáčení rotoru. využívá se toho, že rotor v klidu zaujímá jinou polohu, než má v situaci, kdy je cívka vybuzená. Aby správně fungoval, potřebuje mezi impulsy pauzu. Videem jsi mi potvrdil moji domněnku, že SWEEP verze pracuje s 8Hz taktováním.
SWEEP provedení motorku má ve statoru navíc hliníkový pásek, který funguje jako vířivá brzda a změkčuje tak chod motorku - rotor navíc díky tomu, že je proveden jako setrvačník se otáčí plynule a nekrokuje. Některý rotory mají na sobě mosaznou podložku, některý celoplastový jsou provedeny jako hmotnější (tvoje verze). Na stejným principu, jako je výše uvedený Lavetův motor, pracují synchronní čerpadla v automatických pračkách.
(Let English-speaking readers translate Google with a translator from Czech)