A gravity escapement

[BillM]

Hessel

Just to be certain, the current version of Ticker is 1.13B.

BillM

[ArtF]

Hessel:

Sorry, yes, that version is very old. If you have upgraded, the problem is that you are running an old "ticker.exe" in your main folder.
Update your shortcut to point to the one in the /TickerKinetics/ folder of Gearotic.

Art

[Hessel Oosten]

Art,

Found the solution:

For some unclear reason, I had 2 installations on my PC, on C:\ in the root and on E:\ in Program Files X86.

The shortcut was directing me to the wrong install.

Sorry for the unnecessary workload..., keeping us away from milling, turning and printing ... :eh:

Hessel

[ArtF]

Hessel:

Never a problem. :)

Art

[BillM]

Art

When version 2.0 Beta goes online, I may try experimenting with the gravity escapement again. The following website has a simulation explaining the phases of a gravity escapement: https://www.bmumford.com/clocks/courthouse/escapement/ My Augie vector processor gravity escapement model that I created a while ago used that simulation as a starting point.

The problem I've run into is the "Lock" step of the escapement sequence. The arm that should be briefly locked simply slides down the vane and is in the wrong position to assist the motion of the pendulum. I'm not sure if this is simply a friction adjustment or I have to modify the vanes with a step near their ends to block the arm from sliding during the lock phase.

My interest in the Denison double three-legged gravity escapement is two-fold: Big Ben's escapement is this type of escapement; I also have access to a gravity escapement that's in the Clock & Navigation instruments shop at Mystic Seaport Museum.

I've also located a book that describes the gravity escapement on Google Books: The Watch & Clock Makers' Handbook, Dictionary and Guide
By Frederick James Britten · 1896. I'll have to study this book some more before I get back to my gravity escapement model.

Bill Michael

[ArtF]

Bill:

I think the most important thing is the 90 degree angle of lock surfaces, even a small amount of angle can start a slide of two
surfaces that should be locked due to that 90 degree angle. When I looked at the newtons cradle for example, I found
part of the difficulty is that the newton in reality is adjusted so that when the initial ball hits the stack of 3 or 4 in their
row, the point of contact must be when its string is exactly at 90 degrees and the balls all touch on a spherical surface
at 90 degrees. The force transfers from ball to ball at that 90 degree vector losing basically nothing.. BUT , even a small
angular offset makes the force turn to a vector that causes chaotic motion of the following balls making the forces drop
off quickly. (I know you know all this ), but to be considered is that the drawing of a circle is really small triangles making
a too small to see aliased surface that can, if not REAL accurate to point of contact make that vector swing in a tangential
relationship to the desired force. This tan function can strip power fast or make things slide.
The solution I think is to ensure 90's are 90's even if that takes changing from a spherical contact point to one more
square depending on escapement type. I'll be playing about with that soon to see how to make such situations better,
I'm just fixing some oddball items I dont like in the extrusions before I try out some escapements to see how
they react. B2.0 should be out soon with any luck.

Art

[ArtF]

Bill:

Just running testing to see if I can make a grav escapement with B2.0 . I cannot yet tune it to run more than 2
or 3 ticks.. but on the bright side it took less than an hour to make this example..

gravesc.jpg

Art