hobbing helical gear

@Henk

the gears have 24 teeth at 30 ° and 48 teeth at 60 ° module 2.

So would it be possible to judge if axial feed is required for these gears?

[edit]
I wonder if larger angles also require axial feed

If the hob is long enough to complete the generating of the involute profile it will work. I can't see how axial feed will help at all unless the face width is small.

60 Deg seems unusual. Are these crossed helical gears? I don't have experience with those...

I have no idea what kind of gears these are. Information is a bit scant, really.
I just follow my own curiosity here.

Hm, crossed helical gears, there is always something more to look up

yes it's crossed helical gears 90 degres.

there is a way to catch the head badly with the calculations and the settings of the machine

@jefsaro
I am assuming you have figured out what to do after henk replied that there is a second gear train for the differential. So basically you need to put a stepper or servo on the second gear train and setup in LCNC.

Andy (andypugh) will be the guy to talk with about setting it up in LCNC. That guy is brilliant, and has been working on this for a really long time.


@Aciera

Yeah at first I thought they were referring to herringbone gears when they said crossed helical, but crossed helical is setup like a worm gear. There would have to be some good mathematics involved to get everything meshed up correctly, especially when one gear is smaller than the other like a worm setup.

I wonder if you get more play in this setup compared to a worm setup? This has peaked my interest.


Robert

@CORBETT
I don't really know a lot about gears. I thought maybe I could glean some information by following this project. Alas I have the distinct feeling this is not going to be the busiest of threads. Feels more like milking stones.
Maybe just a language thing though. And he probably gets more stuff done than me. :lol:
Anyway, you seem to have one of those gear hobbers sitting around, maybe you could convert that with all the bells and whistles now?

After all there is no time like the present, is there?