As the name suggests this is an instructable where I will endeavour to show you how to make a clock tick backwards and also to draw your own clockface by hand.
Onwards!
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And I forgot to take a photo of the clock before I started working on it...sorry...
You will also need these tools:
HB Pencil
Sharp scissors
Stanley knife
Mathomat (if you don't have a mathomat you can use a ruler and something round to draw circles)
PVA Glue


















































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The reason it doesn't chance a thing to reverse the coil is the working principle of this type of single phase stepper motor.
For the stepper motor to advance one half rotation it needs a short pulse of the opposite polarity of the previous. The way it rotates is determined by the magnetic resistance in the metal plate which dictates a dominant way for the magnet to rotate. In the perfect world this motor would not work.
It is also why these kinds of motors are real weak (but hey enough to drive clock hands!). The first force that make the first small push of the magnet in one direction so that the primary forces can take over are quite small.
So flipping the coil or de-solder its connections and solder then with reverse polarity make none so ever practical difference because the phase is alternating anyway. Just like your vacuum cleaner doesn't blow instead of sucking if you reverse the plug.
This guide show you how to make a reverse clock - that is, a clock which goes the other way around - counter-clockwise! Why would someone want to do that anyway? A few reasons - Why not? It’s cool.I want to be a member of the “Cult of the reverse clock” We can at least make the clock go backward. Leave it to others to figure out how to reverse time itself.It’s actually fun to see people look at it and try and figure out the time.It’s strange how we expect certain things to behave in a certain way, and how much it confuses us if they don’t.So, now that we have established that everyone and his uncle from “some-godforsaken-place” wants a reverse clock, let’s get going.You will need a clock movement with hands, an old/coaster CD/DVD (or you can use a Windows Vista original DVD)and a 4" dia round plastic container. If you don’t have a suitable container, this is a good excuse to order some food from your fav restaurant.There are a lot of different clock movements available at clock repair shops.The one I have used successfully is about 2" square, and takes one AA battery. It is made by “Palace quartz” and is model number “M2188”. Cost Rs 30/-, hands included. Carefully open the movement. The top of the movement is “press-fit”, so by slightly lifting the tabs on the sides, while applying an upward force, you can open the top. Be careful - you may end up dropping all the wheels. Do it on a flat surface like the dining table so the tiny wheels will not drop somewhere.It is easy to break the retaining tabs, so do not lift them outwards too hard. It is a good idea to take a pic with a digital camera of the insides, so you know where everything was before you mucked around with it. To make the clock go reverse, essentially, you need to reverse the motor magnet. The magent is a little U shaped piece of metal which slides inside the coil.To reach the magnet, you will need to remove a couple of wheels, including the small one with a magnet which is within the pole pieces of the magnet.Carefully slide out the magnet, flip it 180 degrees and slide it back inside the coil. Now replace the wheels you removed, and assemble the movement back together. Your reverse clock movement is ready! Test it out by attaching the seconds hand, and putting in the battery. It should turn anti-clockwise. You can poke a suitable hole using a heated old scissors, in the lid of the plastic container and mount the movement. For a pretty dial, I stuck an old CD on top. I like it without any numbers, but if you want, you can stick on, or print the reverse dial on the CD. To make the container sit stably, I made a stand by poking in some stiff GI wire. Alternatively, you can glue some piece of plastic or wood to make a stand.
To remove the hands, just gently pull them from the clock, away from the spindle. They will come away with minimal force.
It they are really stuck, then perhaps put something under the connection. between the face and the hands and gently lever them up.
I hope your clock ticks backwards :)
but thankyou for your concern :P
Drill holes in the core
thankyou for your comment
I would say that the removal of the peg is easier than drilling a hole into the core, but please feel free to try this method and report back on your findings, as this is a global village and we can only learn from one another...
woo
:)
Thankyou for your question and I hope you enjoyed reading this/making a reverse clock :)