Hi folks! On 24.06.2015 20:24, Len Shelton wrote: > On a machine with a rotary A axis, if I run > > G91 A360 X10 F100 > > the machine moves 100IPM on the X and the A axis completes a 360 > degree rotation at the same time. If I then run > > G91 A360 F100 > > the machines takes almost 2.5 minutes to complete the rotation, because > it is only running 100 degrees per minute. > > So it seems that the feedrate of the linear axis overrides the feedrate > of the angular units if a linear move is coordinated with it. Can > someone confirm this?
Without having tested it, I'd expect it to work as follows: 1. If only a linear move is programmed, the feedrate is in linear units/min and gives the linear velocity. 2. If only a rotational move (ABC axes) is programmed, the feedrate is in rotational units/min and gives the angular velocity (as angle per time, no matter what distance a tool will travel then). 3. If a linear and a rotational move is programmed in the same line, the feedrate is in linear units/min and gives the linear velocity. The angular velocity is adjusted so that the target angle is reached when the linear move completes. As I said, I haven't tested it, but there hardly is another sensible option for most tasks I can think of right now. Regards, Philipp
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