endless screw - diameter factor

[ramjet]

Good evening
I am trying to create a wheel gear - endless screw with inventor, using the design tool.
what leaves me perplexed is that inventor proposes me a factor of diameter (see attached figure).
I went to see also on the texts of applied mechanics, but of this factor there is no trace.
Is anyone able to clarify the meaning?
Thank you.

 

[DrBarde]

Good morning

autodesk guide in these cases can help solve the problem.

diameter factor

allows to calculate the primitive diameter and the angle of propeller according to the diameter factor of the screw.

https://help.autodesk.com/view/invntor/2020/ita/?guid=guid-c8386a3a-c5e4-4f1d-8947-0c107e3cb6f3

being the usual literal translation, it is always advisable to pass from English to doubt
diameter factor (q) means pitch diameter of worm (dw) over axial module (ma). it is effective to use this factor when defining a worm gear meshing user-defined worm because the number of start option in the worm dialog box doesn’t work if lead angle is selected.

https://functionbay.com/documentation/onlinehelp/default.htm#!documents/worm.htm

 

[ramjet]

Thank you. tonight I'll check and...

 

[meccanicamg]

with what you set, taking a cut screw according to the zi method we have:
as you can see, the relationship for the screw:[math]q=\frac{d}{m_x}=\frac{64,128}{4.008}=16[/math]this means that dw is the primitive diameter and mx is the axial module.

I have always detested the Italian translation of this inventor panel. I haven't used it for more than 15 years, but I see it hasn't changed.

In fact, in the normal design you impose the whole of operation, because to realize a decimal interasse you can, you go towards the x=0 profile shifts but me mechanically it is more difficult to realize and to check if you do not have a zeiss control table....that for a box of a vsf is wasted money.

who makes gears has no problem in making profile shifts, which if done duly increase tooth capacity rather than decrease contact pressure.

then could you post the parameters of the materials and regimen/power so we can compare the results?

 

[meccanicamg]

I'll give you the explanations of khk gear
with reference to: