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SP7 Ratchet_60 gear With Screws

Steve could you do me a favor on the SP7 Clock, gear2_ratchet_60_screws, could you make the height of the outer gear two and three times the height. I would be more then happy to pay you for your time. I want to try something with a much thicker tooth gear. I hope I'm explaining this right lol...

11 comments

11 Comments

Steve

You can do this edit in PrusaSlicer.

Start with the original gear

Slice it at Z=1mm

Delete the unused top part

Scale the Z height of the new ratchet to any size you want

Load another copy of the original gear at the same position

Select both instances

Right click and select "Merge"

"File=>Export=>Export Plate as STL/OBJ" if you want to save the new object

The merge step is important to prevent the slicer from printing certain areas twice.

Other slicers should have similar methods of doing the same function.

btw: the EM clock was only functional with the lightweight thin ratchet. The pendulum amplitude degrades very quickly if the ratchet is any heavier. Very little energy is added back in from the electronics with each swing. The rotational inertia of a heavy ratchet took away more energy than the electronics added. The only solution was to make the ratchet as light as possible. Your experiment might need a more powerful drive circuit to get it to be functional.

kicksnj2

Replying to

Went back to the regular ones I got on AliExpress for $1.50 each. I created a test base to test them out by STRONG, GOOD, WEAK swing. I'm getting my strong swing using one 18650 3400mah lithium rechargeable battery. Fully charged it puts out 4.7 volts. Adding that to the little rechargeable and protective overcharge board and running it electric USB-C to USB 5 volt 2.4A

The driver get a constant 4.7 volts without de-grading. If you pull out the USB cord and want to run it on the battery you're still running at 4.7 volts but of course over time it will start losing power. At which point you just plug the USB cord back in run it electric and at the same time it's recharging the battery for you. Also I recreated the pawls. Made them much bigger with almost like paddles on them. I could never get for some reason hoppies upper pawl to stay on the ratchet gear. it would keep falling off of it. I also made them just long enough that it would push the tooth on the ratchet exactly to the point of where the lower pawl drops right down in place without any backswing. Also the bottom pawl has a light coat of a product called tool magic. It's the stuff that you would dip the tips of your tools in and if you're working with fine jewelry you don't rough up the jewelry or scratch it with the tools it puts a rubber coating on the tool. So I put a small rubber coating on the lower pawl edge so that when it drops into the ratchet tooth it stops it dead from moving backwards or forwards so the second hand is always a click effect never rocking. Also I solved the problem with the second hand always falling off. I bought a jewelers/watchmaker tap and die. I now put a thread on the end of the rod and self thread the second hand on. And it stays on very tight. As far as dealing with the hour and minute hand coming loose I stick a pipette on the crazy glue and put the tiniest dot of crazy glue on both sides of each hand that connects to the clock. They can't fall off now unless you slightly twist them then it breaks the little dot but without damaging the plastic if you had to take the clock apart. I've now done this to all the clocks and now all the hands have not come loose at all.

sosalty62

23h

Replying to

That's a great price. I've been using the Geeetech brand of marble. But it's like $19 on Amazon.

kicksnj2

18h

Replying to

Yeah that's too high for me lol... I buy all the SUNLU filament from AliExpress. I wait for the sales that are usually 50% off if you buy 10 rolls or more which I do. And now it ships from a US warehouse AliExpress has warehouses in the United States now. So the filament comes in like 3 or 4 days and it's free shipping. I just looked now, but it's sold out already so I keep looking.