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The medium_start_vel parameter is used to set the initial starting velocity for
the head stage stepper motor when it is running at MEDIUM speed. The motor
ramps up from medium_start_vel to medium_end_vel at a rate specified by
medium_accel and ramps back down using the same acceleration slope as it reaches
its target position. If the value in medium_start_vel is larger than the value
in medium_end_vel, then the stepper motor will start at the speed specified by
the medium_end_vel and will not ramp up or down.
MEDIUM speed is only used while moving the head stage stepper motor towards
its home position while searching for the HOME sensor and while moving to the
install position.
The units used by this parameter are somewhat arbitrary. To convert them to
actual steps per second, please consult the tables in the CY-545 data book.
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