ELITE SERIES USER MANUAL | SPECIFICATIONS |
Although a newly selected drive will not return valid data until the motor comes up to speed, the software need not incorporate any timing delays before attempting a read provided the motor-on time is taken into account in any retry logic. Since a 500ms motor-on time is a maximum, the system software can usually shorten the delay by sampling the drive’s returned data until valid data begins to appear.
Stepper Motor Phase Selection
In order to move the read/write head, each of the four phases of the stepper motor (A-D) must be turned on then off again in a certain se- quence. Each phase is activated/deactivated in direct response to the stepper motor p~ase control interface signals being set logically high/low respectively. If the stepper motor phases are activated then deactivated in ascending order (A, B, C, D, A, etc), the arm is moved inward. In descending order (A, D, C, B, A, etc), the arm is moved outward. The timing between activation and deactivation of these signals is critical.
Activate Writing
The active state of this signal, or logical low, enables the write data to be written on the diskette. The inactive state, or logical high,