Video

That's correct. If one takes the planet as a reference, the sun would be approx 5.5m in diameter. Further, the Mars moons would be smaller than the diameter of the pin they are mounted on.

@@Meccanokinematics yes. 1.2 million km vs 12000 ! 😀👍🏻 Whatever, you sir built a true masterpiece !

I was impressed by this machine as well. A few simple modifications could be made to improve it's performance.

@@Meccanokinematics Yes. The fact that it works today, 39 years later, is a testament to A) quality design and construction (despite the limitations of Meccano) and B) there are people who still appreciate its value. Very few one-off creations stand the test of time. I hope this ends up in a museum some day and is valued for generations, along with the memory of its creator.

That's great. Did you have a look at my website meccanokinematics.net/meccano/models/19-special-meccano-gear-ratios/#designing-an-136525-ratio as well to see how you can add an extra differential to define a leap year?

@@Meccanokinematics a guy up north here in new zealand is making meccano gears an yes a 76tooth!! Makes almost all sizes too

@@grantwells2470 Good to know. I received a pricelist from him. Very reasonable prices.

That's correct, I use it for both operations.

The Meccano model is probably more expensive than a well used original...

I will send a PM to you.

If you mean the 3 planet orrery, that one can be built with standard Meccano gears, but you need also a 20t, 11t , 12 t and 13 pinion. Do you need a Virtualmec drawing? The orrery in this vid is a Mars orrery only. That one needs a few non standard parts, like the 65t gears. I did print the 65t gears and the 20t pinions as I didn't have them. The 65t gear is pretty expensive as well... The bearings are optional, but the system works much better with these bearings.

133

I think your calculations don't take the differential in consideration.

@@Meccanokinematics I made sure the differential works properly before linking it to the other gears, though I’ll have to double check that everything’s spinning in the right direction Edit: seems to be linked properly, so I may have to halve one of the ratios in the train

@@Meccanokinematicschanging the ratio between the red and green gears to 1:2.5 seems to have worked

@artificer26 using a differential gearing you create 2 outputs. In the equation (token from a 50's handbook about gearing) you must half each geartrain. At the green output I get 73 and this number is multiplied by 5 to get 365. On my website I added an extra differential to get a 365,25 ratio. You can also find the calculations there.

@@Meccanokinematics may have figured out the actual issue here - the red gear is the input on my model. Drivers in Blender only work in one direction, so between two gears only one can influence the other at a time. The differential is set up so that the blue shaft is just the averaged value of the two crown gears, though I’m not sure how I’d reverse that so the crown gears are the outputs

Well, that is not entirely true. Take a look at following weblink: meccanokinematics.net/meccano/models/16-meccano-heidelberg-platen-press/

This is a standard speedcube.

Thanks. This was a very challenging, but awesome project. We have made 2 other solvers: czcams.com/video/C9rCBjLGxJs/video.html and here: meccanokinematics.net/new-rubik-solver/

I am using tmc 2208 drivers now. The machine is absolutely silent. Speed of the geartrain is not very fast either.

See the description. The planets and moons were bought from third parties. The Mars moons have been 3D printed by myself.

@@Meccanokinematics oh ok also what type of printer and brand did you use to make the martian moons

@@four4eight Cubicon style. I used ABS filament.

@@Meccanokinematics did you paint it?

@Four4Eight Yes and the colours are based on pictures found on internet.

We showed the Rubiks Shrine at Skegex 2016, but later that year we were able to speed up the machine. In 2022 I substituted the DRV 8825 drivers by tmc silent stepperdrivers. The stepper motors are now completely silent.

@@Meccanokinematics I do remember your previous video. It does seem a bit smoother and quieter. Very nice work :-)

@@Meccanokinematics Some of our greatest creations have the potential to be greater I suppose!

@Meccano Man The machine in this video is faster, but the tmc drivers were only a recent addition from 2022 and this latest configuration has not been filmed yet.

The latest improvement to this machine is substituting the old drivers by tmc 2226 silent drivers. The result is a very silent running machine without any vibrations.

@@Meccanokinematics 🇫🇷 Bonsoir. Merci pour ces précisions. Bien cordialement. M.

Unfortunately you cannot buy it anymore. I myself have only parts for the 6-10-15mm diameter range.

@@Meccanokinematics Yes, I know it's not any more being made. I have been looking for it in the used market but not much luck so far.

The systems you mention will work as well. I saw various impressive 80/20 constructions . The only disadvantage with the 80/20 system is, that once you have made a setup and you want to add a clamp between 2 other clamps, you need to loosen one of these 2 clamps first, otherwise you cannot insert the sleeve. For a prototyping environment this could be an anoying issue.

@@Meccanokinematics with the wide availability of 3D printers and CNC machines, creating a bracket to insert with separable clamp elements wouldn't be too hard, and then theres the drop in t-nuts which address this limitation. I love the VBC implementation for it's time!

@@nerddub Agreed, although not everybody has a CNC at home. Initially I created a 3D printed inbetween clamp, but later I realized, that using an original clamp would work as well by adding a small 3D printed insert to fill the 2.5mm gap between a 15 and 10mm diameter.

@@Meccanokinematics Absolutely that's where I find 3D printing to be most useful, as a medium between off the shelf hardware and my design constaints.

Indeed. Part of the demo model has been built with FAC system. I love the FAC system. Just have a look at my website www.meccanokinematics.net

Initially it was only used by Philips themselves, but soon became available for other industries and for universities. It has been quite popular in the 70's and 80's. As far as I know the system was only for sale for other companies and not sold to privates.

@@Meccanokinematics Such a shame Meccano didnt go down this direction, imagine the things that could be built with meccano with these options and accuracy.

Also kinda like scaffolding, just a tad smaller

Ik heb nog steeds voldoende over om een translatie tafel te maken, dus als je interesse hebt, kom vooral langs.

That's correct.

@@Meccanokinematics cool

en wat vind je van deze: czcams.com/video/7xeS8_ZBKDU/video.html

If you mean the gearpair on the topleft, Than yes. This gearpair was only introduced to maintain the same rotational direction of the output shaft compared to the input shaft. So for every full rotation of the input shaft, the sungear (this is the geararm rotating around the input shaft) rotates one revolution as well, because the number of teeth of the pinion on the input shaft are the same as on the sungear. The left 19t pinion of this sungear engages with a 17t pinion. A full revolution of the sungear means a displacement of 19 teeth. The 17t gear is also displaced with 19 teeth, or 17 + 2. So after 17:2 = 8.5 rotations, the output shaft has made a full revolution whilst the input shaft has made 8.5 revolutions.

@@Meccanokinematics thanks -- so the 17 tooth gear rotates 19/17 rotations for each rotation of the input gear. Or 19 rotations for 17 of the input.. Correct? How does this lead to 2:17? Or am I wrong?

Remember that the sungear is rotating 1:1 compared to the input. So a full revolution of the sungear leads to a full revolution of the gear attached to the sungear as well. Whilst the left gearpair attached to the sungear differ with 2 teeth, the ratio is 2:17. Just study the vid and watch the threaded bolts attached to the input and output shaft.

@@Meccanokinematics I think I understand now -- When the 19-tooth sungear completes a revolution, it pushes the 17-tooth gear to move 2 teeth ahead since the teeth are on the same radius. (If it was a 19 tooth gear as well it would not move at all.). To complete a rotation of the output shaft takes 17/2 revolutions of the sungear i.e. 8.5 to 1.

@Atul Divekar That's indeed correct. It's interesting to mention, that I initially wanted to use a 20t pinion in stead of a 17t pinion. If using a 20t pinion I could have left the gearpair on the top left away to maintain the same rotary direction of the input and output shaft!