MaxFlight FS-3000, Manual

Page: 35 / 131

35
1-2C Electro Magnetic Interference (EMI)
EMI is a problem when you have high current wires laying parallel with low
current/voltage wires. When the magnetic field about a wire changes, that change induces
voltage spikes or signal interference into associated wires. If this becomes a problem
there are ways to correct this.
One, is limiting induction on other wires by using shielded cables and connections.
The other method is to space wires apart or run them ninety degrees to each other. In this
system we use both methods to limit power interference into video, audio and control
signal cabling.
Roll Motor: Three phase AC motor and gear box. Mounted in the center weldment.
Roll shaft and hub assembly gets mounted through the center of the gearbox held by a QD
coupling. Gearbox pre-filled at factory.
Roll Brake: Mounted on the end of drive motor. Dynamic braking stops motor
rotation and when brake power is removed to solenoid it holds the axis where last left. The
brake solenoid power 220 VAC goes to a full wave rectifier inside the motor connection
enclosure where it is converted to DC voltage. The brake solenoid coil operates with DC
voltage from 181 to 220 VDC. It has a manual brake release lever, located at base of
motor.
Roll Encoder: Is a 120 count encoder (480 in quadrature) mounted on the end of
the roll motor shaft. Sends roll position of the platform back to the computer via the
interface board and motion control board.
1-2 D Roll Axis
Center Weldment
Roll-Brake
Solenoid and
manual brake
release lever