Rotating Ballnut - design ideas

[Heavyweather]

Why do you need a rotating ballnut for a 16xx screw? This should say it all. Did you read anything at all from that thread and the forum?

Several times the last 6 or so years.

Why not? I got a 2m belt on belt drive now and 2m 2005 screws but the 16mm is cheaper and easier to do.
Plenty of machines that use it up to 3m (https://www.cnc-aus-holz.at/index.ph...6525#post16525) and some that sell it, some mostly/only the 16mm.

https://team-haase-shop.de/maschinenelemente.html

https://www.ems-moederl.de/ws45.html
(Uses 2 on Y and one on X)

https://schulze-leistungselektronik....ne-kus-mutter/
https://schulze-leistungselektronik....ne-kus-mutter/

http://cnc.a-ueberbach.de/?s=angetriebene%20mutter

[JAZZCNC]

Several times the last 6 or so years.

Why not? I got a 2m belt on belt drive now and 2m 2005 screws but the 16mm is cheaper and easier to do.
Plenty of machines that use it up to 3m (https://www.cnc-aus-holz.at/index.ph...6525#post16525) and some that sell it, some mostly/only the 16mm.

https://team-haase-shop.de/maschinenelemente.html

https://www.ems-moederl.de/ws45.html
(Uses 2 on Y and one on X)

https://schulze-leistungselektronik....ne-kus-mutter/
https://schulze-leistungselektronik....ne-kus-mutter/

http://cnc.a-ueberbach.de/?s=angetriebene%20mutter

Just because someone else uses it doesn't mean it's good or should be used, not every one who builds a CNC is good at it or as the experience to know better.!! . . .For instance one of those guys built his machine from wood which says it all really.!

Also just because a company as designed and sells a product doesn't automaticly make it a good product. I've experienced many products from suppliers like Haase that seem to look good only to find in practise they have some serious flaws, whether that be instantly obvious at time of fitting or appear over time in use.

With some experience of rotating ballnuts then I see such issues occuring over time with this narrow unbalanced design, but you take your chances and time will tell.

My point in this post is to say don't be fooled by what your seeing and reading, because most of those singing the praises are the designers and often those that have bought them won't admit they have issues or even have the experience to know they have issues or what the issues are over time.! . .Often blaming other areas of the machine when things do start going wonky.!