| General > General Technical Chat |
| Trying to See if I Can Fix This Desk Clock |
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| Boris_yo:
Hello. The clock's not showing any activity with fresh alkaline batteries. After opening the back cover the cogs don't move. They are supposed to?The coil on top has a wire loose. Don't know if it's supposed to be that way. (Click to enlarge) I don't have any expertise with fixing clocks but I like tinkering with stuff. I wonder which part of the clock failed and whether I can fix it before throwing it away. Thanks. |
| Alex Eisenhut:
Looks like a bunch of gears not meshing. |
| Boris_yo:
--- Quote from: Alex Eisenhut on October 29, 2022, 02:45:53 pm ---Looks like a bunch of gears not meshing. --- End quote --- I removed the red cog and the white cog, leaving only the central one. It doesn't move regardless. I thought it's the one responsible for moving the pointers. |
| mariush:
My guess is the coil is an electro-magnet which is turned on every second and moves a metal piece a short distance which in turn rotates a wheel, which then turns the other wheels. If the wire is broken/ loose it's no longer an electromagnet. See what happens when you touch that loose wire to the pad from where it broke off |
| amyk:
https://en.wikipedia.org/wiki/Lavet-type_stepping_motor |
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