SEEK(OPCS)		Optical Printer Control System		SEEK(OPCS)

    NAME
	seek - seek to positions quickly on camera/projector(s)

    USAGE
	seek [pro2] [pro1] [cam]	# slew pro2, pro1 and camera 
	seek [pro1] [cam]		# slew pro1 and camera
	seek [cam]			# slew just the camera

	'-' can be used in place of arguments for motors that you do not
	want to change.

    EXAMPLES
	seek >101             # camera seeks to x101 
	seek >100  >101       # pro1 to x100, camera to x101
	seek >1200 >55 >0     # pro2 to x1200, pro1 to x55, cam to x0
	seek >1200 - >34      # pro2 to x1200, pro1 unchanged, cam to x34
	seek 1200 1200        # slew 1200x on both pro1 and cam

    DESCRIPTION
        SEEK is used to seek to certain frame positions at high speed. This
	command is not to be used for exposing film (see notes below).

	If SEEKCAP(OPCSDEFS) is set to 'yes', the fader will automatically
	cap whenever the SEEK command runs the camera. After winding, the
	fader will return to its previous position.

	SEEK ignores any FEED(OPCS) files in progress. This allows you to
	shuttle film around without interfering with motion control moves.

	SEEK allows a simple way to quickly seek to start positions. SEEK
	figures out the proper ratios to get all the motors to their positions
	as quickly as possible. When running the camera, the 'fastwind' speed
	is used (see SPD(OPCSDEFS)), instead of the current 'exposure' speed.

	SEEK can be used in place of:

	    pro2 >1000 pro1 >1200 cam >100

	..which will take a long time to run, because it runs the motors 
	one at a time. The equivalent of the above would be:

	    seek >1000 >1200 >100

	Note the use of > to specify absolute frame positions. Without 
	it, frame numbers will be interpreted as a relative 'windoff' value,
	the same way the other OPCS commands work.

	If you want to ignore a particular motor, just specify a dash (-) as
	that motor's argument, and the motor will not be moved, ie:

            seek >1200 - >100
                       ^
                       Ignore 'projector' channel

    WARNINGS
	Do not use SEEK for exposing film. During a seek:
	
	    > The camera runs at its slewing speed, NOT the exposure speed.
	    > The projectors will NOT run in sync with the camera.
	    > The state of the viewer will be ignored (assuming buckle and
	      viewer are not wired together)
	    > Buckles will be checked

	Normally, camera operators will want SEEKCAP(OPCSDEFS) enabled so the 
	fader automatically caps when using SEEK to avoid exposing film.

    SEE ALSO
        SPD(OPCSDEFS) - sets the normal and slew speeds for motors

    ORIGIN
	Gregory Ercolano, Los Feliz California  09/04/90
© Copyright 1997 Greg Ercolano. All rights reserved.