Good points, The motors he quoted only take 6.6amps normal stall current.
Personally I design a power supply voltage for around 120% of motor max terminal voltage.
Also it has been my experience that normal cutting forces are not where max torque current occurs, but on accel/decel.
If you have a Y mill axis that has the combined weight of the X axis motor and table etc and also any part load that is carried by the table, you could be looking at a couple of hundred pounds at least, now if you rapid that load at 100 ipm, or even say milling a right-angle at 20ipm, this load is expected decel and accel from 20 to 0 to 20 in in an extremely short time, this combined with cutting force, places a high demand on any system.
This is where the motor/load inertia ratio calculation is important.
Al.
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CNC, Mechatronics Integration and Machine Design.
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E. |