Thingiverse
Self winding pendulum clock (climbing weight for weight driven clocks) by krahut
by Thingiverse
Last crawled date: 3 years ago
"Climbing weight" so that the pendulum clock never stops
Demo:https://youtu.be/jV5sDiRVjcE
Concept:https://youtu.be/RdRMT0bqkkohttps://youtu.be/s17w4Eyq9Rc
Don’t worry, if you forgot to wind up your clock. The clock itself will do it for you...Abstract
I’ve wanted to make a pendulum clock for a long time, so I printed one recently. However, I seem to be lazy enough to keep this alive continuously and wind it twice a day (once if I would use a pulley bearing as a two-fall compound). That is why I made an automatic winding mechanism but not in the usual way. Instead, I redesigned the clock weight itself. Thus, a "dumb and puffy" hanging-only part became an active component of the mechanism, supporting the operation of the clock :). The modification requires only minimal changes to the clock hardware itself, virtually 99% of the original clock remains intact.With this method, many 3D printed weight-driven clocks can be automated (even after completion) without having to delve deep into the structure of the clock. Plus, it's all completely hidden, no one can recognize that the clock is automatized.
The concept
The energy needed to operate the clock is still provided by the potential energy of a weight. However, the commonly used cord to hang weights is replaced by an endless metal ball chain. The chain is placed on the slightly modified winder drum and the weight "clings" to this chain. Once the weight has reached a certain lower level while the clock is running, it climbs its own to the upper position. The clock can also be wound up manually by pulling the other half of the chain in the usual way to lift the weight again.
The weight consists of two separate and displaceable parts: the outer shell and the inner assembly-block (frame, motor, batteries, coin-weight, etc). The position of the free-moving outer shell relative to the assembly-block depends on whether the weight hangs at the uppermost position or at the lowest position on the chain. To detect this, a bi-stable switching mechanism is provided which switches the electric motor. If the weight is completely down, the chain will tension the outer shell up relative to the inner assembly and this actuates the switch what starts the motor. As a result, the weight begins to climb on the chain up until it reaches the bottom of the clock. The clock pushes the outer shell down relative to the assembly and the switch stops the motor. And the game starts again, the weight sinks with the chain until it reaches the lowest position then the weight climbs back to the top on the chain... It's so simple... written... but let's see...
The climbing weight
The weight includes a tiny cheap and easily available (Ebay / AliExpress / Amazon) geared electric motor. The energy for the movement is provided by 4 pieces 1.5 Volt batteries connected in series. The mass of the weight can be further increased with coins. The current version is designed to fit 21.3 mm diameter coins. So, the 5 Euro cents, the 5 USD cents or the 5 HUF fit perfectly. It can also be used with smaller diameter coins, but care must be taken to ensure that the ball chain does not reach the coins. The mass can be any other thing, putting them into a small plastic bag and placing it into the coin compartment. I put 2x15 pieces of 5 HUF in it, so the total mass of the weight is 320 grams. Actually, my clock runs at 200 grams too, I tried it, but it depends a lot on how heavy and long (inertia and forces) the pendulum is and how much friction there is in the clock’s mechanics (but YMMV). You can experiment ... I use a micro switch desoldered from a defect mouse, but this kind of switch is also easy to get from the online stores. I made the contacts of the battery holder from a ball point pen spring and drawing pins. The two shafts of the pulleys can be made from a suitable nail. The rod of the switch actuating mechanism can be a 3 mm diameter wood stick, or a rod can be printed out with the associated switch actuator. The whole mechanism is covered with a cylindrical shell, two halves of which adhere to each other with small magnets. This makes it very easy to disassemble and control the climbing weight. Instead of magnet, four pieces shafts placed into the hole of magnets as pin bolts are also suitable...
The clockThe base of the clock I built earlier is designed by A26 (https://www.thingiverse.com/thing:1739676, One Plate Mechanical Clock) Credit to him for this. It is a nice minimal design clock, it shows the basic components needed to operate a clock, easy to print then assemble. I especially like this clock that the clock-face can be replaced with another look as you like, no need to disassemble/change/assemble the clock. I wanted to keep it itself as original as possible so that the gears / parts could still be seen during operation. https://www.thingiverse.com/make:929621 Remix issue Thingiverse: https://www.thingiverse.com/groups/thingiverse/forums/site-issues-and-feedback/topic:48410
Changes and remarks on the clock
The only change that is absolutely necessary to be able to operate the clock with a chain instead of a rope is described at the point 1. The rests are only needed because of the reliability or circumstances, e.g. I do not have any penny. The changes I made to the pendulum clock are as follows:
1 The winding drum (drumb.stl -> CW_CLOCK_drumb.stl) has been redesigned so that the weight hangs on a ball chain instead of a cord.2 A hole has been made throught the ratchet part of the drum (druma.stl -> CW_CLOCK_druma.stl) for a screw (=cotter pin) so that the ratchet cannot rotate on the shaft. Accordingly, an about 4mm wide flat part 27mm from the end was made on the 75 mm long shaft. This provides a more reliable force transmission than the grip and/or glue between the shaft and the ratchet.3 A "top point stopper" (CW_CLOCK_stopper.stl) has been created so that the weight does not collide with the dial plate or the clock escapement when it climbs up. The stopper simply snaps onto the frame of the clock.4 I cut a thread on both ends of the pendulum's rod, so I can easily fine-tune the balance of the pendulum and the time keeping accuracy of the clock. I also resized the coin holders of the pendulum (bobs, penweight.stl) to fit 100 HUF. One coin is placed at each end. To Hungarians: I didn't know it before, but with the same look, this coin exists in two different weights.5 Added a washer under the escapement wheel to avoid any collision between the wheel and the frame.6 Pendulum bar (200 mm shaft) fixation improved, drilled a hole and added a security screw to the anchor.7 I printed the "-v2" variant for wheel4 assembly. It requires an additional Ø3x16mm shaft but allows easier hour-hand adjustments in the daily use of the clock. Just medium grip needs between the shaft and the wheels.8 I also modified the bearing nests on the frame because I had bearings of other sizes (11x5x5mm) at home. This stl is not included.
In order for the climbing weight to be used for other clocks, a ball chain gear of the appropriate size must be attached / mounted to the winding drum of the clock. The higher the number of teeth on the chain gear, the lower the weight required to drive the clock. A little help making the proper ball chain gear can be found here: https://www.thingiverse.com/thing:4851360
The continuous operation requires an endless ball chain. For this, I printed a simple “cavity” tool (CW_TOOL_ball_chain_cavity.stl) so that the chain can be looped with a traditional combination pliers. Print two pieces...
Recommended assembly method and adjustment:
Coming soon...after request
Bom (non-printable components):
• 1 pc geared electric motor, GA12-N20, 6V, 30rpm
https://www.aliexpress.com/item/33022320164.html
• 1 pc switch, D2FC-F-7N
https://www.aliexpress.com/item/32924769791.html
• 1-3 m ball (bead) chain, Ø3.2 mm, ≈225 ball/meter (can be colored e.g. brass)
https://www.aliexpress.com/item/4001148205301.html
• 1 pc screw and nut, M3, min. 18 mm
https://www.aliexpress.com/item/10000181324125.html
• 2 pcs shafts Ø3x21 mm
https://www.aliexpress.com/item/32297671032.html
• 8 pcs magnets Ø3x6 mm (or 4 shafts Ø3x10-12 mmm)
https://www.aliexpress.com/item/1005001515842121.html
• 1 pc flyback (snubber) diode to protect the switch. 1N400X or 1N4148, etc.
• 4 pcs AA battery, 1.5V
• 2 pcs ballpoint pen spring
• 2 pcs flat head metal push pin
• 15 cm wire
• lots of coin
• super glue
Postscript
I have had the clock with the self climbing weight for about ten days. My ball chain was 3 meters long, so it hung about a meter and a half from the clock. With this length the weight reached the bottom point approx. every 12 hours and climbed back to the clock. With a shorter chain, the clock-weight would pull itself upThe modification requires only minimal changes to the clock hardware itself, virtually 99% of the original clock remains intact.
With this method, many 3D printed weight-driven clocks can be automated (even after completion) without having to delve deep into the structure of the clock. Plus, it's all completely hidden, no one can recognize that the clock is automatized. more often. I wanted to see frequently how the weight climbs up, so I recently shortened the chain, now it hangs just about 80 cm. I have no idea how long the batteries and mechanics will last, so far I don’t see any problems.
Update 30.04.2021
After roughly 3 weeks of continuous operation, the switch became intermittent because its contacts have burned out. I replaced the switch and soldered a flyback diode to the motor terminals to protect the switch against the inductive voltage spikes. Component added to the bom list. See photo about the installation.
Demo:https://youtu.be/jV5sDiRVjcE
Concept:https://youtu.be/RdRMT0bqkkohttps://youtu.be/s17w4Eyq9Rc
Don’t worry, if you forgot to wind up your clock. The clock itself will do it for you...Abstract
I’ve wanted to make a pendulum clock for a long time, so I printed one recently. However, I seem to be lazy enough to keep this alive continuously and wind it twice a day (once if I would use a pulley bearing as a two-fall compound). That is why I made an automatic winding mechanism but not in the usual way. Instead, I redesigned the clock weight itself. Thus, a "dumb and puffy" hanging-only part became an active component of the mechanism, supporting the operation of the clock :). The modification requires only minimal changes to the clock hardware itself, virtually 99% of the original clock remains intact.With this method, many 3D printed weight-driven clocks can be automated (even after completion) without having to delve deep into the structure of the clock. Plus, it's all completely hidden, no one can recognize that the clock is automatized.
The concept
The energy needed to operate the clock is still provided by the potential energy of a weight. However, the commonly used cord to hang weights is replaced by an endless metal ball chain. The chain is placed on the slightly modified winder drum and the weight "clings" to this chain. Once the weight has reached a certain lower level while the clock is running, it climbs its own to the upper position. The clock can also be wound up manually by pulling the other half of the chain in the usual way to lift the weight again.
The weight consists of two separate and displaceable parts: the outer shell and the inner assembly-block (frame, motor, batteries, coin-weight, etc). The position of the free-moving outer shell relative to the assembly-block depends on whether the weight hangs at the uppermost position or at the lowest position on the chain. To detect this, a bi-stable switching mechanism is provided which switches the electric motor. If the weight is completely down, the chain will tension the outer shell up relative to the inner assembly and this actuates the switch what starts the motor. As a result, the weight begins to climb on the chain up until it reaches the bottom of the clock. The clock pushes the outer shell down relative to the assembly and the switch stops the motor. And the game starts again, the weight sinks with the chain until it reaches the lowest position then the weight climbs back to the top on the chain... It's so simple... written... but let's see...
The climbing weight
The weight includes a tiny cheap and easily available (Ebay / AliExpress / Amazon) geared electric motor. The energy for the movement is provided by 4 pieces 1.5 Volt batteries connected in series. The mass of the weight can be further increased with coins. The current version is designed to fit 21.3 mm diameter coins. So, the 5 Euro cents, the 5 USD cents or the 5 HUF fit perfectly. It can also be used with smaller diameter coins, but care must be taken to ensure that the ball chain does not reach the coins. The mass can be any other thing, putting them into a small plastic bag and placing it into the coin compartment. I put 2x15 pieces of 5 HUF in it, so the total mass of the weight is 320 grams. Actually, my clock runs at 200 grams too, I tried it, but it depends a lot on how heavy and long (inertia and forces) the pendulum is and how much friction there is in the clock’s mechanics (but YMMV). You can experiment ... I use a micro switch desoldered from a defect mouse, but this kind of switch is also easy to get from the online stores. I made the contacts of the battery holder from a ball point pen spring and drawing pins. The two shafts of the pulleys can be made from a suitable nail. The rod of the switch actuating mechanism can be a 3 mm diameter wood stick, or a rod can be printed out with the associated switch actuator. The whole mechanism is covered with a cylindrical shell, two halves of which adhere to each other with small magnets. This makes it very easy to disassemble and control the climbing weight. Instead of magnet, four pieces shafts placed into the hole of magnets as pin bolts are also suitable...
The clockThe base of the clock I built earlier is designed by A26 (https://www.thingiverse.com/thing:1739676, One Plate Mechanical Clock) Credit to him for this. It is a nice minimal design clock, it shows the basic components needed to operate a clock, easy to print then assemble. I especially like this clock that the clock-face can be replaced with another look as you like, no need to disassemble/change/assemble the clock. I wanted to keep it itself as original as possible so that the gears / parts could still be seen during operation. https://www.thingiverse.com/make:929621 Remix issue Thingiverse: https://www.thingiverse.com/groups/thingiverse/forums/site-issues-and-feedback/topic:48410
Changes and remarks on the clock
The only change that is absolutely necessary to be able to operate the clock with a chain instead of a rope is described at the point 1. The rests are only needed because of the reliability or circumstances, e.g. I do not have any penny. The changes I made to the pendulum clock are as follows:
1 The winding drum (drumb.stl -> CW_CLOCK_drumb.stl) has been redesigned so that the weight hangs on a ball chain instead of a cord.2 A hole has been made throught the ratchet part of the drum (druma.stl -> CW_CLOCK_druma.stl) for a screw (=cotter pin) so that the ratchet cannot rotate on the shaft. Accordingly, an about 4mm wide flat part 27mm from the end was made on the 75 mm long shaft. This provides a more reliable force transmission than the grip and/or glue between the shaft and the ratchet.3 A "top point stopper" (CW_CLOCK_stopper.stl) has been created so that the weight does not collide with the dial plate or the clock escapement when it climbs up. The stopper simply snaps onto the frame of the clock.4 I cut a thread on both ends of the pendulum's rod, so I can easily fine-tune the balance of the pendulum and the time keeping accuracy of the clock. I also resized the coin holders of the pendulum (bobs, penweight.stl) to fit 100 HUF. One coin is placed at each end. To Hungarians: I didn't know it before, but with the same look, this coin exists in two different weights.5 Added a washer under the escapement wheel to avoid any collision between the wheel and the frame.6 Pendulum bar (200 mm shaft) fixation improved, drilled a hole and added a security screw to the anchor.7 I printed the "-v2" variant for wheel4 assembly. It requires an additional Ø3x16mm shaft but allows easier hour-hand adjustments in the daily use of the clock. Just medium grip needs between the shaft and the wheels.8 I also modified the bearing nests on the frame because I had bearings of other sizes (11x5x5mm) at home. This stl is not included.
In order for the climbing weight to be used for other clocks, a ball chain gear of the appropriate size must be attached / mounted to the winding drum of the clock. The higher the number of teeth on the chain gear, the lower the weight required to drive the clock. A little help making the proper ball chain gear can be found here: https://www.thingiverse.com/thing:4851360
The continuous operation requires an endless ball chain. For this, I printed a simple “cavity” tool (CW_TOOL_ball_chain_cavity.stl) so that the chain can be looped with a traditional combination pliers. Print two pieces...
Recommended assembly method and adjustment:
Coming soon...after request
Bom (non-printable components):
• 1 pc geared electric motor, GA12-N20, 6V, 30rpm
https://www.aliexpress.com/item/33022320164.html
• 1 pc switch, D2FC-F-7N
https://www.aliexpress.com/item/32924769791.html
• 1-3 m ball (bead) chain, Ø3.2 mm, ≈225 ball/meter (can be colored e.g. brass)
https://www.aliexpress.com/item/4001148205301.html
• 1 pc screw and nut, M3, min. 18 mm
https://www.aliexpress.com/item/10000181324125.html
• 2 pcs shafts Ø3x21 mm
https://www.aliexpress.com/item/32297671032.html
• 8 pcs magnets Ø3x6 mm (or 4 shafts Ø3x10-12 mmm)
https://www.aliexpress.com/item/1005001515842121.html
• 1 pc flyback (snubber) diode to protect the switch. 1N400X or 1N4148, etc.
• 4 pcs AA battery, 1.5V
• 2 pcs ballpoint pen spring
• 2 pcs flat head metal push pin
• 15 cm wire
• lots of coin
• super glue
Postscript
I have had the clock with the self climbing weight for about ten days. My ball chain was 3 meters long, so it hung about a meter and a half from the clock. With this length the weight reached the bottom point approx. every 12 hours and climbed back to the clock. With a shorter chain, the clock-weight would pull itself upThe modification requires only minimal changes to the clock hardware itself, virtually 99% of the original clock remains intact.
With this method, many 3D printed weight-driven clocks can be automated (even after completion) without having to delve deep into the structure of the clock. Plus, it's all completely hidden, no one can recognize that the clock is automatized. more often. I wanted to see frequently how the weight climbs up, so I recently shortened the chain, now it hangs just about 80 cm. I have no idea how long the batteries and mechanics will last, so far I don’t see any problems.
Update 30.04.2021
After roughly 3 weeks of continuous operation, the switch became intermittent because its contacts have burned out. I replaced the switch and soldered a flyback diode to the motor terminals to protect the switch against the inductive voltage spikes. Component added to the bom list. See photo about the installation.
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self portrait by jenn0902
...self portrait by jenn0902
thingiverse
self portrait
thingiverse
free
self-portrait by monnanney
...self-portrait by monnanney
thingiverse
self-portrait
thingiverse
free
Self-Portrait by tzb152
...self-portrait by tzb152
thingiverse
self-portrait project
thingiverse
free
3D self by Charliehustle75
...3d self by charliehustle75
thingiverse
3d scan of self
thingiverse
free
self erecting crane
...self erecting crane
thingiverse
new mobile self erecting crane
thingiverse
free
Self Scan by Blakie
...self scan by blakie
thingiverse
self scan of me using an xbox kinect as a scanner
thingiverse
free
Self Portrait by chrisseddon
...self portrait by chrisseddon
thingiverse
small scale self portrait i did as an exercise.
thingiverse
free
self folding box by WillandMrData2
...self folding box by willandmrdata2
thingiverse
self folding box, self forming box.
:) :]
thingiverse
free
Self Watering Planter
...self watering planter
thingiverse
this is a self watering planter i created while tinkering around in tinker cad
Weight
thingiverse
free
Weight for Me - Customizeable Weights by dsnettleton
... weights are not compensated for the weight of the plastic, which can change with infill and printing material. fill accordingly.
thingiverse
free
Weight by terop
... this weight is. it's made out of 200x200x200 voxel, in a regognizable weight shape. supports are needed to print this model.
thingiverse
free
SCUBA Weights
...ted bc's. might work well on a manikin in the store, mine were made for cosplay and fit (as sized) on a 2" weight belt.
thingiverse
free
Weight stop for scuba diving weight belt. by andreas_58
...ight stop for scuba diving weight belt. by andreas_58
thingiverse
weight belt for scuba diving weight belts.
fit 5cm wide belts.
thingiverse
free
Weight tree by schmjop
...weight tree by schmjop
thingiverse
weight tree for olympic weights and profihantel x36 dumbbells.
thingiverse
free
Paper weight by baylee_3030
...paper weight by baylee_3030
thingiverse
this is a paper weight.
thingiverse
free
Weight Distribuator by skovle
...use. there are provided space for hanging weights on each side of it.
this tool is made for children, who have psysics in school.
thingiverse
free
Clock weight by pumpkinhead3d
...clock weight by pumpkinhead3d
thingiverse
just a clock weight!
thingiverse
free
Baby Weight by trevhen
...baby weight by trevhen
thingiverse
baby weight rattle
thingiverse
free
weight locker by kfirrer11
...weight locker by kfirrer11
thingiverse
weight locker 30 mm