FPF(OPCSDEFS)		Optical Printer Control System		FPF(OPCSDEFS)

    NAME
        fpf - configure 'frames per foot' for a shutter motor

    SYNOPSIS
        fpf [chan] [frames per foot]

    EXAMPLE
        fpf a 8       # aerial projector is Vistavision (8 frms/ft)
        fpf b 16      # main projector is 35mm (16 frms/ft)
        fpf c 40      # camera is 16mm (40 frms/ft)
        fpf c 0       # disable foot/frames counters for camera (K2.02+)

    DESCRIPTION
        Sets the number of frames in a foot of film for each axis. This value
	is used by the camera/projector counters to calculate for the
	feet/frames display, as well as how to interpret expressions 
	such as cam 12'0.
	
	[chan] is the motor channel being configured.

	[frames per foot] may be any integer value that specifies
	the number of frames per foot of film. In K2.02 and up, this value
	can be '0' to disable the feet/frames counter in the display.

    BUGS
        Versions older than K2.02, an FPF value of 0 was unsupported
	and would blow out the software with a DIVISION BY ZERO error. 

	Also, floating point values (such as .5) are not valid arguments
	for the FPF command.

    ORIGIN
	Gregory Ercolano, Los Feliz California 11/29/89