Quote Originally Posted by JAZZCNC View Post
The motors are 8Nm Lichuan closed loop steppers using 230Vac mains drives. It doesn't use a break because the gantry is vertical so Z-axis isn't fighting gravity, plus 8Nm is more than enough for this Z-axis even with heavy ATC spindle on it.
I totally missed that.. It is of course the X-axis in your case that could perhaps need a brake, but seems like its fine without.

Would there be any chance that a 400W Delta servo with brake couldn't handle my Z-axis of around 25-30kg, with a 2:1 reduction or even 1:1? I could go for 600W if that would be better.
Quote Originally Posted by JAZZCNC View Post
Regards the JMC then I've no experience using these motors or drives so I can't comment on how good or bad they are and I haven't looked at the specs, but if I'm honest I wouldn't use motors with integrated drives on a CNC machine. The heat and vibrations from the motors along with cutting debris, esp from aluminum coolant, etc, can't help with life expectancy but for me what's worse is the fact your running long signal wires back to the controller leaving you wide open to issues with interference from noise.
Got it, thanks again. I will now completely forget about these servos with integrated drives.



Skickat från min SM-A530F via Tapatalk