New Version 3.80

[ArtF]

Hi Guys:

  3.80 is online.

 It has a new timing pulley generator which gets rid of non tangent arcs in the first 15 types of pulleys.
It also completes the gear calculato r, and you can send the calculato rs end designs back to the designer for creation.

  3.8 will take over the top spot of the downloads page next week.

 Ill post later a note on current progress, and start a discussio n on developme nt prioritie s to get an idea
which ideas are most important to develop.

Later
Art

[Mooselake]

Art:

Thanks for all the good work!

Kirk

[JimG]

Hi Guys:

  3.80 is online.

Art,

I've been busy with a lot of other things so haven't been doing too much with Gearotic,  but I downloade d V3.8 last night and had a quick look around at what's there.   One thing I noticed was that the module calculati ons seemed peculiar when I selected "helical" - i.e. if I set up Module 1 with a 25 tooth gearwheel then I got a PCD of 25mm on the spur setting,  but 35.3553mm on the helical setting.   Is this a fault,  or is my knowledge of gearing a bit suspect? 

Jim.

[ArtF]

Jim:

  Hellicals change size when made, except if you select the very non-standard setting of "Maintain size"..
Normally, a helical gear increases its pitch size and its overall diameter.

Art

[ArtF]

Hi Guys:

  The download page has been updated so the 3.8 verison is the lowest version you can download. At present the devlopmen t version as well is 3.8.
Both will be the same until the next developme nt version is done and online.

My appologie s to those I told to download the developme nt version, it was listed actually as the beta version download. That too has been corrected .

 As to what comes next, Im taking a break from tooling to add a simple graham escapemen t so clockmake rs will have at least one escapemen t to work with,
as I suspect its a bit tough for some to make their first escapemen t..


Art

[bosr]

FYI:
I just made a 7.5 DP, 12 tooth, type "H" timing pulley Without spokes.
The 3D .DXF was generated with spokes.

[Dan]

HI Art,

There used to be check boxes to show Gear, Pitch, Base and Root Diameter in the older versions. I can't find them now. Are they gone? It was a nice tool to visualize the circles for those not accustome d with the terminolo gy.  

Also, is it possible to make the installer add Gearotic to the Srart Menu in Windows?

And, if you're going to add escapemen ts, will they actually simulate? Would be nice if they did... have no idea how you can make it work though.

Dan

[ArtF]

Dan:

  Youll find those diagnosti c circles on the spoking tab now.

I am going to try to have the system simulate the escapemen t, but as you say its a bit of
a daunting task. The reason I decided to add an escapemen t, is that I notice many are making
only 90 degree grahams with a span of 1/4 of the deadbeats tooth count. I imagine this is because
all the tutorials use those as the example for the ease of using 90 degrees as the tangental selection angle.. Im attemptin g to make the graham as a parametri c type of object so the user can span as many or as few teeth as he likes as well as modify the lift angles and pallet widths.

   Cant say how hard it will be. The new escapemen ts will appear on the ratchet/recoil page when done as a recoil is closest to a deadbeat gear as we have. Simulatio n will be a bit of a bitch as it would entail lockign previous gears rotations to the timed responce of the escapemen t, but Ill see what I can do. This one has had the most number of requests, likely due to the complexit y of making a proper escapemen t. ( I already see on the web some conflicti ng instructi ons on the math.

Art

[JimG]

Jim:

  Hellicals change size when made, except if you select the very non-standard setting of "Maintain size"..
Normally, a helical gear increases its pitch size and its overall diameter.

I sort of thought that it would be me.   

Thanks for the heads up.

Jim.

[Dan]

Thank you, Art. I see them now.

Dan

[ArtF]

Jim:

  In case your curious as to why the helical gets larger..

   In a helical the gears tooth is slightly turned sideways to the helical angle. Looking at it in profile,
that tooth is now thinner.. In order that such a helical can match a spur gear of the same module, that "thinner" profile tooth must be made larger so that in profile its the normal size. Since the number of teeth must remain the same and they are physicall y larger, the gear itself must be larger to accomodat e them.

  When you select "Maintain size", your telling GM to create a helical, but you dont care if its the same
matching tooth as a spur gear so it will keep the size the same as the spur specifica tion.

Just in case...

Art

[JimG]

Jim:

  In case your curious as to why the helical gets larger..

   In a helical the gears tooth is slightly turned sideways to the helical angle. Looking at it in profile,
that tooth is now thinner.. In order that such a helical can match a spur gear of the same module, that "thinner" profile tooth must be made larger so that in profile its the normal size. Since the number of teeth must remain the same and they are physicall y larger, the gear itself must be larger to accomodat e them.

  When you select "Maintain size", your telling GM to create a helical, but you dont care if its the same
matching tooth as a spur gear so it will keep the size the same as the spur specifica tion.

Just in case...

Art,

Thanks.  I was going to go and see if I could Google an answer to why helical gears were different . 

Jim.

[John T]

Hi Art,
I have been hoping for a long time that someone would come with an escapemen t design and the Graham Deadbeat is an obvious choice.  As a clock builder and designer I am in a position of designing an escapemen t from scratch every time I build and while I can do it - variation s to the design are really limited.  From time to time I get asked if there is a program out there that will design an escapemen t and I refer them to Gearotic.  Do you have any idea or hint of how long the wait will be? 
I think your work is great and really appreciat e what you have done and continue to do.
Thanks

[ArtF]

Hi John:

  I now have the full escapemen t designed. . you can use any size deadbeat and any tooth span you like... ( provied it spans a .5 tooth space ). Im doing the simulatio n now, and I hope within a couple weeks to release a version you can at least cut the escapemen ts with. It's gone real well so far, the numbers and pallets look good, and its all parametri c so you should be able to design any you like. I also added user selectabl e drop and lock angles and I want the simulatio n to be able to show you how well it will work.

   Ivbe learned enough about escapemen ts that perhaps I can add more complicat ed ones in the future, but we'll see how this one works out. Its my and Bobs intent to make a plexiglas s clock as a working example
and as a sample project for GM for the next release..

Art

[John T]

Hi Art,
I am excited!  Have you included a parameter for the "witness"  I think that's what they call the tip of the teeth on the escape wheel.  I know with my cutting ability I need 1 mm at the tip that blunts the point or I have fits trying to cut "pointy" teeth.