03-06-2019, 09:40 PM
During an unexpected power down the solenoids clearly are disengaged rapidly.
Without an extensive study of the mechanical parts in the manual I would guess that the solenoids either release the brakes or engage the motors when they are powered.
The transistor turns them off rapidly when power is lost via there negative supply. The switches select positive supplies to them as required for normal operation.
Without an extensive study of the mechanical parts in the manual I would guess that the solenoids either release the brakes or engage the motors when they are powered.
The transistor turns them off rapidly when power is lost via there negative supply. The switches select positive supplies to them as required for normal operation.
