New build – input/comments appreciated

[ngundtoft]

I have stiffened up the X-axis ballscrew nut mounting by increasing material of bracket to 30mm, increasing cover plate to 10mm and inserting a 20mm triangular support.


I feel somewhat uncertain with respect to using a single motor and belt setup for the X-axis. I remember reading that the Nema 34 motor should normally be avoided because acceleration is much slower than the 23. So do the advantages (better alignment, single motor) make up for the drawbacks (lower acceleration, long complicated belt)?

Maybe a long belt could just go below the top cantilevers (and the bed) by using some extra idler pulleys?

[njhussey]

I have stiffened up the X-axis ballscrew nut mounting by increasing material of bracket to 30mm, increasing cover plate to 10mm and inserting a 20mm triangular support.

Image: http://www.mycncuk.com/attachment.ph...id=16043&stc=1

I feel somewhat uncertain with respect to using a single motor and belt setup for the X-axis. I remember reading that the Nema 34 motor should normally be avoided because acceleration is much slower than the 23. So do the advantages (better alignment, single motor) make up for the drawbacks (lower acceleration, long complicated belt)?

Maybe a long belt could just go below the top cantilevers (and the bed) by using some extra pulleys?

If you look in my build log you'll see me jogging my long X axis (your Y) at 10m/min. I had it up at 15m/min and it was fine so I've n9 qualms about using the 6Nm Nema 34 with the 230V driver, it's plenty quick enough. My belt is 2525mm long and again I've no problem with it (so far!!!)

[JAZZCNC]

Neil I don't mind in the slightest and consider it a compliment with anything taken from what I offer or show. Also wasn't mean your machine wasn't pretty but the fact long belts in general are messy.

[njhussey]

Neil I don't mind in the slightest and consider it a compliment with anything taken from what I offer or show. Also wasn't mean your machine wasn't pretty but the fact long belts in general are messy.

It's messy, I don't mind admitting it, as I've a just got a temporary plate and pulleys on it to get it going.....