وب تفریحی و سرگرمی کرمک

انواع مطالب جالب و سرگرم کننده اینترنت

وب تفریحی و سرگرمی کرمک

انواع مطالب جالب و سرگرم کننده اینترنت

How to Maintain electric battery powered

How to Maintain electric battery powered


 make certain the metal contacts within the battery holder aren't unsound. The spic-and-span battery you place in won't fix the matter if the metal contacts ar dirty. If the metal isn't shiny and clean then scrape it exploitation sandpaper (220 grit or there-about can work fine). If you do not have sandpaper then you'll use alittle flat-bladed screw driver or different 'pointy' metal tool. If this fixes the matter, then you've got gotten off the hook within the best doable manner.
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    Check the static magnet. If the matter still persists, then the Lavet kind stepper in your Quartz clock in all probability incorporates a slightly misaligned static magnet, (i.e., the rotor). you wish to maneuver the magnet back to the right position. So, you've got ne'er detected of this thing? attend Wikipedia.com and skim the article on "Lavet kind stepping motor".
        Please note that this text solely shows a super-small stepper motor like is employed in an exceedingly wrist-watch. The one in your clock is way larger and easier to figure on. strive to not let yourself be intimidated. it's not that arduous.
   
    Perform a straightforward check to verify that your Quartz clock has this sort of drawback. Lay your clock on a flat table with the face of the clock inform up at the ceiling. See if the used incorporates a drawback wherever it starts and stops or perhaps stops utterly. If so, then it's probably that the little static magnet has slipped backwards and is not any longer within the same horizontal plane because the metal of the magnet.
 this is often currently the second a part of this straightforward test: Flip the clock over in order that the force of gravity can pull the miscroscopic magnet back to its correct position. The face of the clock can currently be facing down towards the ground.
        If your table is created out of glass then you'll sit on the ground and appearance up through very cheap of the table to envision if your clock is running properly. Or, you'll simply choose the put down and hold it higher than your head to appear at it. you wish to stay it within the same horizontal downward facing position. If your clock works fine within the downward position however not within the upward position, then you've got a misaligned magnet.
   
 take away the miscroscopic black plastic box from the rear of your clock. this is often the box that holds the AA battery within the back and therefore the clock hands on the front. it's referred to as a stepping-type clock movement. To do this, begin by removing the clear plastic cowl on the front of the clock. it always has three plastic tabs or indents round the environs. See if you'll find wherever these three tabs ar.

    Use alittle flat screwdriver to softly pry these three tabs loose and take away the clear plastic front cowl.
http://www.toxel.com/wp-content/uploads/2009/11/wallclock10.jpg
    Gently take away the three clock hands, (the used, the big hand, then the hour hand). simply pull outward (on one hand at a time) and that they can pop off. place them in an exceedingly tiny instrumentality off to the facet to stay them safe. strive to not drop them on the ground and particularly to not step them.

    On the rear of your clock, there ar a pair of giant black plastic tabs or hooks that firmly mount the clock movement to the rear of the clock. Gently pry these a pair of tabs outward only enough to permit you to get rid of the clock movement from the rear of your clock.

 take away the battery.

    Open up the clock movement and appearance within. to try and do this you wish to get rid of the black plastic cowl on the rear of your clock movement. Be careful. it's three unharness tabs, not 2. there's a hard-to-see tab within the middle of the battery compartment. strive to not break any of those tabs as a result of you wish them to carry your clock movement along. Gently take away the rear cowl and appearance within. If any of the miscroscopic white plastic gears have fallen out of their correct position, then place them back.

 acquaint yourself with the components within your clock movement.
        See ( ساعت دیواری طرح قهوه ) printed circuit? There ar a pair of terribly small copper wires that connect this circuit board to a wire coil mounted beneath. strive to not break these wires. they're solely zero.003 inches in diameter and ar terribly fragile. Please notice that the coil of wire is wrapped around one leg of a comparatively giant "U" formed piece of flat metal. These a pair of items along kind associate degree magnet.
 once electrical phenomenon flows within the coil of wire then it makes the iron-alloy metal core become magnetic. there's associate degree air gap at the open finish of the "U". this is often wherever the miscroscopic static magnet goes. Together, these three components kind a Levat kind stepper. The static magnet is created within the form of a toroid, (or donut).
 hooked up to at least one facet of the magnet may be a cabbage butterfly plastic gear with teeth thereon. it's referred to as a rotor as a result of it "rotates", (i.e., it spins around in a circle sort of a bicycle tire). there's associate degree shaft or very little plastic rod that goes at ninety degrees during the middle of our magnetic toroid. the miscroscopic magnet should be lined up right within the middle of the flat metal that surrounds it, (i.e., the electromagnet), alternatively our very little motor does not run fine.
        One finish of this small plastic shaft for our rotor goes into alittle hole that is found within the black plastic cowl that you took off. this small hole is simply too deep! this is often the total drawback. we'd like to cut back the depth of this hole in an exceedingly precise manner. Doing thus can probably change the clock to figure utterly for several years to come back. The difficult question here is "How can we do this? however can we live or somehow verify simply specifically however deep this hole ought to be? conjointly, however can we then refill very cheap of this hole in an exceedingly precise manner, (to within many thousandth's of associate degree inch)?"

 make certain that you have settled the precise hole within the back cowl that's meant for holding the stepper-motor rotor in situ. Open up the opening in order that it goes all the manner through. strive to not use alittle drill. you may scuff the edges of the opening. this could considerably speed up the speed at that these plastic components would wear out.
 believe it. you would like your clock to endure a few years to come back. this suggests that your very little rotor are going to be spinning in situ and rubbing against the within of this hole day and night for several years. For long life, it's vital that at the places wherever plastic rubs up against plastic that each surfaces ought to be terribly sleek.
        No, a drill isn't suggested. The vital issue is that it's created out of hardened steel which the tip. The plastic wall at the rear of this hole is simply concerning 1/64 th of an in. thick. simply pushing thereon (from within the hole) with the right style of sharp, pointy metal tool can poke a hole all the manner through.
 the precise size of this hole might vary from manufacturer to manufacturer, thus it's within the vary of zero.025 to 0.050 inches in diameter. Once you've got poked a hole through the rear wall from the within, then flip the rear cowl around and clean it up from the surface. you would like the opening to be nicely opened-up in order that you'll get at it from the rear, (while the clock is running in an exceedingly face-down position).
 you're reaching to place glue down this hole, a special sort of glue. it's referred to as "Plastic Fusion" and you get it at a store for HVAC referred to as Grainger's. (Do a Google search on the net to search out close toest|the closest} Grainger's store near you.
        Also, you wish sensible air ventilation as a result of the fumes from this glue ar unhealthful. scan the cautions on the rear label.) it's a 2-part glue and is incredibly thick. you would like the glue to fill the top of this hole no end the rotor from spinning. Use motorcar petrol on the tip of the rotor shaft shaft in order that the glue wouldn't persist with the rotor and it'd be unengaged to keep spinning. it's vital that the clock run and keep running the total time that this glue is drying.
 you would like the glue to stay to the rear cowl of your clock movement however to not the rotor itself. to try and do this you wish to watch out to not place oil on the surface of the rear cowl close to the opening. However, you are doing desire a touch of oil down within the hole on the tip of the rotor shaft shaft. The safest thanks to management wherever the oil will and does not go is as follows. Before golf stroke the rear cowl on, dip the tip of the rotor shaft shaft into alittle petrol. Wipe off most of the oil by gently touching it to a clean, dry surface many times. Use the table high of my work bench. place the rotor back within the stepper.
        Be terribly careful that the shaft shaft of the rotor is inform straight up and down and not off to the facet alittle bit. The rotor itself may be a very little magnet and therefore the metal it sits next to is additionally slightly magnetic. the key to creating the rotor arise straight is to rotate it by forty five degrees or ninety degrees in order that its own flux is correctly aligned with the residual magnetic fields of the 2 items of metal on either facet of the rotor. simply play with it, you will get it. If the rotor shaft shaft isn't straight up and down once you place the rear cowl on, then you may break one thing, (the very little shaft socket towards the front of the clock). it's doable to mend a chance like this however it's terribly particular. simply watch out and do not break it, OK?

    Gently place the rear cowl on whereas keeping the clock movement in an exceedingly face-down position. Oil might try and set out the opening. Gently dab it off to stay the encompassing space dry. you will like better to highly to|favor to|opt to} use one thing more applicable, sort of a rag or tissue.

 place the battery within the clock in order that it runs. you will need to quickly place the used back on the clock to verify that it's running properly whereas in an exceedingly face-down position. Take the used off once more as a result of it gets within the manner whereas you're making an attempt to try and do the gluing. strive exploitation spool of solder (because it's a hole within the middle), as an area wherever you'll set the clock movement down in an exceedingly face-down position. you will have another item, (such as alittle wood board with a hole in it), that's convenient for you.

 false impression your 2-part glue and gently push alittle little bit of it down the opening. This last half is a lot of art than science. Use your best judgement. it's higher to err on the facet of insufficient  glue down the opening instead of an excessive amount of.

 place a giant clump of glue (~ 1/3 in. in diameter) round the whole space. the miscroscopic clump of glue down the opening has nothing to stay to attributable to the oil. What holds it in situ is that the massive clump of glue. it's vital that the clock keeps running for the total time that the glue is drying. It takes the glue concerning associate degree hour or a pair of to dry.

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