Identifying Helical Spur Gears

[ArtF]

Ozzie:

Sry, didnt get notification on this thread again...

  The feedrate will be calc'd correctly for the motion of the A, but its still A1 is 1 degree, not one inch. BUT, when you command G1X10A3, Mach will calculate the actual distance moved and ocmpute feedrate based on that, so the Higher the Z , the larger the distance traveled for that A3 and the higher the feedrate will be.

Art

[ozzie34231]

Thanks Art,
That's neat, not my wild hope but cool nevertheless.
I see I'll need a mill about 1.25 mm.
Regarding my post a few back beginning "Well I thought---"; is it unusual that I come up with a module that is not an integer and does not seem an even DP either? Is cutting a test gear my best solution?
Ozzie

[ArtF]

Ozzie:

>>is it unusual that I come up with a module that is not an integer and doe

  Not unusual at all. While gear specs are published everywhere, many are "Tweaked" by their maker in various ways, and that can throw off
attempts to measure them. For example a mod4 profile shifted gear may measure 4.12Mod if you try measuring it and dont know its profile shifted and compensate. It can get very complex to do helicals and bevels in that way.
  As you'll see when you play with GT now, it automatically profile shifts a gleason gear for example and the resulting gear isnt the size
youd think from quick calcs. Such is the way of gearing.

  I do intend to add a screen in the new year that will allow you to measure a gear in various ways , enter the measurement and have GT figure out what kind of gear you may have and suggest how to duplicate it. I can see the facility for such a thing, but in the meantime, have no qualms about making one a weird module.. nothing wrong with that at all. I too look for "magic" numbers when working things out, but sometimes they just arent relevent. :)

Art

[Sanjaya1]

Hi Art its me again.... can you explain me how to cut in just one direction when use involute cutter ??

gotta problem for some material when cutting in both direction..

thank you.

[ArtF]

Hi:

  You can't as yet. I haven't written any capability of single directional cuts in GT. You can tell GM to put out
such code.  It is on my list of todo's for the very near future.


Art

[Sanjaya1]

really need that fast art i'm using a gear grinding wheel now.. and need one direction cutting so for now i'm just using it manually.. thank you