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SP07 pendulum clock unit
Hi Steve, any updated links to the correct type of unit, all the ones I have been able to get are different from the one you identify
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SP 15 Smaller Moonphase Clock
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SP14 Large Moon Phase Clock
This is my version of the SP14 Large Moon Phase Clock. It's my 2nd Steve's Clock, the first being a SP8 Coup Perdu. So far it's run through an entire moon phase extremely well and is within my accuracy target of a minute per week.
I printed the clock last winter but didn't assembly it until recently. I noticed that all the thin wheels had warped to varying degrees.
I recovered the wheels using the procedure above with weights, heating the printer bed to 75C and letting them soak at that temperature for 15 mins and then cool. So far they seem to be holding their shape and I think the old PLA filament that was used was probably the problem.
The clock is running very robustly at the pulley weight shown. The wheel arbors are polished SS rods which I think provide a better bearing surface than piano wire…
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Steve
29 سبتمبر
Looks good. 4lb 10.4oz is a bit on the low side. The clock runs, as you say, but the pendulum amplitude is probably a bit shallow. This makes it sensitive to stopping from drafts or if it goes out of beat when winding. The amplitude should increase if you add another pound or two of drive weight.
Interesting about the warped gears. And I great solution. PLA can start getting soft around 60-70C. And supposedly it creeps over time, but I have not noticed the frames warping on any of my clocks mounted on the wall. One warped when I was travelling with it and placed it on the passengers side floor area of a car with the heater running.
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SP 16 FRAME-AGAIN
Forget foregoing-- I uninstalled and reinstalled Cura and now it fits. My apologies, tho I have no idea why.
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Steve
26 سبتمبر
That's strange, but good news. I knew it was supposed to fit. The settings must have been different in the old version.
I started with PrusaSlicer, then added SnapMaker Orca. They are similar enough that I can usually find what I need. I get completely lost trying to find my way around in Cura, even though Google says it is supposed to slightly easier to use. Every slicer seems to have a million knobs to turn.
Hang in there, it gets easier after a while. The assembly guide will list the recommended print parameters. The important settings are the number of wall loops (or perimeters). Most parts probably want 4 walls, but a few parts might be listed to use 5. And if the manual says to use the Classic slicer for the gears, they will print significantly better with Classic.
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SP 16 FRAME TOO LARGE FOR PRINT BED
HI- Was wondering if you could provide .stl of large frame halves with interlocking lap or dowel type joinery so frame can be printed ,then assembled as one unit.
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Steve
25 سبتمبر
The frame fits on a 220x220 bed with a rotation of -5 degrees. The skirt and brim will need to be turned off.
If you really feel like you need to split the frame, most slicers have the feature built-in.
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SP16
JUST PURCHASED + KIT AND FRAME TOO BIG FOR MY ENDER PRINTER
220 X 220 PRINT AREA
WOULD LIKE RETURN CREDIT
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Steve
24 سبتمبر
All of my clocks are designed to fit the Ender 3 (220x220) and Prusa MK3 (250x210) sized printers. The default orientation fits on a Prusa. Rotate the frame parts -5 degrees on the Z axis and they should fit on an Ender 3. You may need to turn off the skirt and brim.
Check if you can make the parts fit. Etsy allows until Saturday for me to either ship or cancel the parts kit. I will wait until I hear how you want to proceed before doing anything. MyMiniFactory customer support has to handle refunds on their sales. I do not know how they deal with digital downloads after they have already been downloaded.
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SP14 Large Moon Phase Clock
I have had this clock running reliably for several months and keeping good time within a couple of minutes per week. Now, the clock appears to run as before, but the hands do not move, or only move a minute or so after several hours. The clock is ticking and the pendulum is swinging normally.
Any thoughts as to the problem?
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Michael Billington
29 سبتمبر
Yes I had this problem too with the smaller Moon Phase Clock. The same thing - clock running well with good amplitude but hands intermittently turning. I discovered that the screww for the main centre wheel was slipping because I m,ust have over tightened it and it stripped the thread thus it would not turn and just ideles there. I printed the same gear again and carefully screwed the small bolt in just beyond finger tight and now the problem is resoved. The clock now runs beautifully and keeps great time. For a more permanent fix I will use small brass heat inserts next time and appropriate and long anough screws. This did not happen with the Rolling Ball clock though.
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32 day build de-bugging
Hello all, I have completed the build for the 32 day easy build clock.
I thought everything was going great until I tried to hang the weight on it, and I cannot get it to work.
I have gone through the de-bugging steps on the guide and was not sure where the problem. My initial thought was the weight shell is too light, but I have since increased the weight to almost 8 pounds and still have no luck.
I can spin the gear by hand and see everything moves as expected. Is there something else I should be looking at before.
I will say, I feel like I need to push on gear 8 (the gear that holds the weight) pretty hard for it to move.
Any thoughts?
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Steve
23 سبتمبر
More data would help debug the issue.
What runtime option are you using? 8lbs should be enough in 8 day mode, but not enough in 32 day mode.
What are the escapement characteristics? Does it rotate with the 8lb weight? How quickly does it start spinning?
How long is the pendulum free swing test?
I recently released a simple friction test to identify if your filament is slippery or sticky. It can be found at https://www.myminifactory.com/object/3d-print-clock-gear-friction-test-836333
Answers to these questions can help determine if you should focus the debug on the pendulum or the gears.
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Compact Clock 16 Friction Clutch
Having fun tweaking Compact Clock #16.
My first-ever 3D print is coming along nicely as I fix and upgrade the first print -- which admittedly was rough. Eventually, it will be finsihed. Right now the clock is ticking along nicely. However, the hands are running at about half speed.
Data:
In Compact Clock 16 that means the middle arbor is not turning normally.
Middle arbor is driven by Gear 4 (which is driven the Gear 5 and the weight shell.) Gear 4 is friction clutched to the middle arbor. It is escapement controlled to 1 R/Hour.
Gear 4b is set screw attached to the middle arbor so both 4 and 4b turn at 1R/H.
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Steve
20 سبتمبر
This diagram shows the gear topology in the clock.
There is a long unbroken chain of gears between the winding drum and the escapement. If the pendulum is swinging properly then gear 4 must be rotating at close to once per hour. The rate is determined by the pendulum length and it cannot run at 2/3 speed. Therefore, the issue must be between the friction clutch and the hour hand.
The friction clutch adds a loose connection between gear 4 and gear 4b to allow changing the time without affecting the pendulum. It does not need to be very strong. It only needs to be strong enough to overcome any downstream friction. Music wire (also known as spring steel or piano wire) creates enough pressure against the M3 arbor. Soft steel or brass wire might not apply enough pressure.
Gear 6 is the primary gear to check for friction. The printed gear 6 arbor must pass through the dial without binding. Also gear 6 must not be pressed against the back of the dial. Push and pull on the hour hand to make sure gear 6 has some end shake. Look for end shake in gear 5 as well.
One more thing to check is the gear 4b set screw. The friction clutch is circled below in green in the exploded diagram below. It loosely presses against the M3 arbor. Gear 4b tightly connects to the M3 arbor using a set screw, also circled below in green. Move the minute hand and make sure gear 4b moves at the same rate. There should be a slight resistance felt by the friction clutch.
Hopefully, this will give you some ideas to check. Please report back if you find the cause.
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I Used these last week and they are fine.
Quartz Pendulum Drive Unit Module General Movements Clock Repair Acces O TM _&c | eBay UK