Reference Manual

Turbo PMAC/PMAC2 Software Reference

Turbo PMAC Program Command Specification 434

 If the feedrate programmed with the F statement causes any motor in the coordinate system to exceed

its Ixx16 velocity limit (when active), all axes will be slowed so that no motor exceeds its limit.

 If the vector distance of a feedrate-specified move is so short that the computed move time (vector

distance divided by feedrate) would be less than the acceleration time currently in force (TA or 2*TS

or the time set by the Ixx17 limit when active), the move will take the full acceleration time instead,

and the axes will move more slowly than specified by the F command. If the acceleration time is 0,

the minimum permitted move time is 0.5 msec.

 If vector-feedrate axes and non-feedrate axes are commanded together on the same program line, and

the time for any non-feedrate axis, computed as the axis distance divided by the alternate feedrate

parameter Isx86, is greater than the move time calculated for the vector-feedrate axes, then Turbo

PMAC will use this longer time for the move, resulting in a lower vector feedrate.

 If only non-feedrate axes are commanded to move in a feedrate-specified move, Turbo PMAC will

compute the move time as the longest distance commanded for any axis divided by the Isx86 alternate

feedrate parameter. If Isx86 is set to zero, it will compute the move time as the longest distance

divided by the programmed feedrate. Use of the Isx86 parameter for all moves can be forced by

using the NOFRAX command, which makes all axes non-feedrate axes.

 If the % override value for the coordinate system is at other than %100 when the move is executed,

the move will not execute at the specified speed. The actual speed varies in direct proportion to the %

value.

Examples:

F100

F31.25

F(Q10)

F(SIN(P8*P9))