RAMPCURVE(OPCSDEFS)	Optical Printer Control System	RAMPCURVE(OPCSDEFS)

    NAME
        rampcurve - configure the motor ramping curve for shutter runs

    USAGE
        rampcurve [value]		# 1.0 = linear, 0.0 = sinusoidal

	[value] should be in the range -0.3 to 1.0. Values outside this
	range are not recommended.

    EXAMPLES
	 _________________________________________
	|           o o o o o o o o o o           |
	|         o                     o         |
	|       o                         o       |
	|     o                             o     |
	|   o                                 o   |
	| o                                     o |
	|-----------------------------------------|
	| rampcurve 1.0                           |
	|_________________________________________|

	 _________________________________________
	|            o o o o o o o o o            |
	|         o                     o         |
	|       o                         o       |
	|      o                           o      |
	|     o                             o     |
	| o o                                 o o |
	|-----------------------------------------|
	| rampcurve 0.0                           |   <-- recommended setting
	|_________________________________________|


    DESCRIPTION
        This command allows the user to define the curve used during ramping
	for the shutter motors. The effects are subtle at higher speeds.
	
	The linear graph is desireable for motors that are moving a great
	deal of torque, or overcomming a large inertia.

	The sinusoidal graph (if you can tell which that is, what with our
	'high resolution' display capabilities here) is for motors that
	can quickly get up to speed, without torque problems.

	The sinusoidal ramp is preferable, in order to avoid motor resonance
	at the slower speeds. (Normally, all stepper motors resonate more
	at slower speeds, and this can be counter productive during ramping.)

    SEE ALSO
        MRP(OPCSDEFS)     - set 'maximum ramping pulses' for shutter runs
	RAMP(OPCSDEFS)    - set maximum acclerations and velocities
	SPD(OPCS)         - set the camera's exposure speed
        SPD(OPCSDEFS)     - set a motor's running speeds
	RAMPCURVE(OPCSDEFS) - set ramping curves for shutter runs

    ORIGIN
	Gregory Ercolano, Los Feliz California 12/15/89