Adds rectangular fixtures to the bottom of the substrate
Caution: This card requires spelling with an upper-case X.
*FIXR r11, r12, r13, r14 r21, r22, r23, r24 ...
r11: r*8: min x-coordinate
r12: r*8: max x-coordinate
r13: r*8: min y-coordinate
r14: r*8: max y-coordinate
This card is used in conjunction with *AUTM or *STLF. All nodes within the defined rectangles are fixed in all 3 axes. The following figure illustrates the option.
Positioning of a rectangular constraint
Best practices: Use *FIxR, if practical, to avoid overconstraining the part.