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April 08, 2020, 12:02:00 AM *
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 on: April 06, 2020, 03:08:17 PM 
Started by dchib - Last post by ArtF

 Yes, you got it. Most of the formulas are based on pitch curve and requested hole diam..


 on: April 05, 2020, 01:24:33 AM 
Started by dchib - Last post by dchib
On closer examinati on the formula looks to be

HubDiamet er=PitchDiameter x Ratio/100 + HoleDiame ter

If you could confirm I would appreciat e it

 on: April 05, 2020, 12:55:06 AM 
Started by dchib - Last post by dchib
I plan to install a clamp screwed to a circular gear to fix the gear securely to its shaft.  I'd still like to have spokes on the gear but need to be sure the hub diameter is sufficien t to accommoda te the clamp screws.  Hub size is given as a ratio.  Is there a simple formula to give the hub diameter based on one or more of the dimension s displayed for the gear.  Perhaps I'm missing something obvious but I've tried to determine a formula without success.  Can you help please.  Cheers

 on: April 02, 2020, 07:53:02 PM 
Started by lehmann - Last post by ArtF
Hi Marc:

  You can build such a thing, but unfortuna tely gearotic will not simulate it, it wont allow
gears to change position during motion..


 on: April 02, 2020, 12:15:48 PM 
Started by lehmann - Last post by lehmann

is it possible to build a planetary gear where the sun-wheel is fixed and the planets run around the sun. That would need a rotating disc the shafts of planets are mounted to and that disc Needs to rotate around the suns shaft.
I tried alot but I was not able to build something like this in gearotic.

Any ideas?


 on: April 01, 2020, 10:21:31 AM 
Started by lehmann - Last post by Hessel Oosten
Concernin g "open contours"

I always apply on contours that SHOULD be closed the command PEDIT (PolylineE DIT).
If the contours are carefully closed all than is converted to a "one and only line".
If there are not closed contours you can easily see them and close the problem simply.
So, it's a sort of quality control before problems can arise from non closed contours.


p.s. Another frequentl y encounted problem while dxf's convertin g from one program to another is that there are lines on top of each other.
Milling programs can struggle with it !
The command "OVERKILL"

 on: April 01, 2020, 07:17:03 AM 
Started by lehmann - Last post by ArtF

     Do you have Acad2013 selected in options as the output type in Vexx options settings? I find360fu sion doesnt
like any DXF prior to that.


 on: April 01, 2020, 04:16:43 AM 
Started by lehmann - Last post by lehmann
Thanks for your answer. Vexx seems to be quite helpfull but dxf-file exported from Vexx can't be opened in Fusion360 . If I bring the simplifie d gear back to Gearotic and Export a dxf-file it can be opened in Fusion360 but seems to be an open contour and can't be extruded.

Any idea?

 on: March 31, 2020, 06:20:24 AM 
Started by wjh30 - Last post by ArtF
Hi :

   Hard to say. Its noteworth y that helicals are known for being quiet because they
mesh in more points at the same time. Their sizing then is more critical.  A bit of
error in a spur gear is likely not noticed, but a bit of error in a helical is much
more noticable and its amplified by the line of mesh being more complex.

   Its possible all your gears should be done at 99% due to the printing of them
making them a bit "squishy" in terms of exact sizing. I havent noticed this effect
but I always print my gears at 99% as early on I found it allowed a better fit
for my timing and spur gears.
   Your mod of .99 may actually be printing a mod of 1.0 , you'd never notice
on a spur, but on a helical it'd be much more acute.



 on: March 31, 2020, 01:06:37 AM 
Started by MarkW - Last post by tweakie
Excellent work Mark.

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