Originally Posted by
ninefinger
the stepper motor torques are fine. 2.5 Nm is plenty for the cutters and speeds you will run. Anything bigger is just helping you break tools and the machine faster when you make a mistake.
Those steppers coupled to a 4mm lead ball screw can generate 300 Kg force easily, plenty for X and Y. Sure the torque drops at higher speeds but you don't need lots of torque at higher speeds as you are not cutting then.
In this case I feel confident the manufacturer has put together the kit in a responsible way that will work well for you. Don't get sucked into the bigger better faster mentality for a hobby machine, you'll save more time (and money) with a machine that is well balanced.
Mike