The Rainnea gantry router inspired my thinking on this one.
Sofare I only have some small steppers I've ordered for the project. For the 3 stardard axis I have the following -
107.8 mN.m Holding torque
24.5 mN.m pull out torque
16.7 mN.m Pull in torque
And for the two rotational axis -
The holding torque is 78.4mN.m
pull-out torque 27.6mN.m/200pps
pull-in torque 26.5mN.m/200pps
Both motors are 4 phase, 7.5 deg stepping.
Speed is not an issue for this so I figured they can be geared down for more torque. Also, after taking apart a bipolar motor, I'm fairly confident that can be rewound for a lower resistance, greater torque/speed at the cost of heat.
I'm still unsure on the size of the spindle motor (wattage and RPM) for say a 1mm endmill?
Also and comments about the practicality of such a project would be greatly appreciated.