[ger21]

How fast will you be cutting? You may end up with higher than 30Kg cutting force if your cutting near 8-10meters/minute. You better have a powerful spindle as well.

[Geof]

I think you might have to reconsider your possible motor size. The chart you posted showed a maximum input power of 838 watts. I cannot comment on what torque you might need but I think you need much more power than 838 watts. I have a gantry machine that rapids the Y axis at 2100 ipm (53 m/min), it is ballscrew and uses a servo motor with a peak input power of just under 10kw and it runs up to this during acceleration on a rapid move.

[rceebuilder]

How fast will you be cutting? You may end up with higher than 30Kg cutting force if your cutting near 8-10meters/minute. You better have a powerful spindle as well.

Gerry this is exactly what I want .According to my calculations a 500 watt DCbrushservo with 1.6 Nm @ 3000 rpm will be fit perfectly or 660 watt DC brushless servo can be used. What do you recommend? These motors data sheets are attached.

Another point that I don't understand is the sychronization of all 3 axis as servo motors are used. Let's say we use 3 servo and 3 drivers .Okay ,each servo works as closed loop but if one of the servos is jammed how the others know this In my opinion when this occurs machine must stop and must give an alarm. Is it possible to to it with these hobby servodrivers ?

Murat.