Quantum Composers AF910 - Manual (Page 20)

Page 20 AF910 Manual Version 1.4
provides either a TTL or an open collector type output. The limit switches can be
configured to be either active high or active low. Refer to the serial command set for a
description on how to configure the limit switch input polarities.
Setup and Control:
There are two modes of operation for the motor controller: manual and automatic. When
in manual mode, the motor control is initiated by the host and when in automatic mode,
the motor control is initiated by the sensor. When in automatic mode, the sensor will
control the speeds and direction of the motor as well as starting and stopping movement.
This allows for the unit to maintain focus without user intervention. Many of these
functions are also describe in the command set section.
- Motor Speed. There are two speeds available, high and low. When in manual
mode, the last set speed whether it is high or low becomes the active speed.
When in auto mode, the system determines the speed to be use based on the
distance away from the target focus. The speed command (SP) is used to set
the high and low speeds of the unit.
Figure 17 Motor High/Low Speeds
Initial Speed. This is the initial or starting speed that the motor will begin to move at.
This must be adjusted according to the dynamics of the motor controller and the type
of motor or stage being used. If set to fast, the motor may immediately stall, if set to
low, the motor may take too long to get up to the target speed (high or low). The IS
command is used to set this parameter. The motor will dynamically accelerate the
speed from the initial speed to the high or low target speed.
Figure 18 Motor Initial Speed
- Home Speed. This is the speed at which the motor will move when the home
sequence is initiated. This speed should be set such that the motor can
accurately detect the limit switch without any possibility of over-running it.
This is set by using the HS command.