Physical travel limits of servos are specified at the Servos screen.  Without Extended Limits checked in the Model Set Up screen, the maximum servo travel is limited to “100%” in the Servos screen, corresponding to a PWM signal to the servos of 1500 +/- 512 uS (microseconds).  If the Extended Limits box is checked in the Model Set Up screen, travel limits in the Servos screen can be increased to 150%, allowing PWM signals of 1500 +/- 768 uS to the servos.

Note 1:  Maximum weights available in the Inputs screen and Mixer Screen are unaffected by Extended Limits.

• The Inputs screen will accept weights up to 100% regardless of Extended Limits.
• The Mixer screen will accept weights up to 500% regardless of Extended Limits, but the output from Mixer (product of Input times Mixer) is limited to 100% .
• A signal to a servo is the product of weight from Inputs times weight from the Mixer for a given channel.  The maximum output signal of 150% to the servos is available through Extended Limits.

Note 2:  Control surface movement has diminishing returns as servo rotation becomes extended.  Until we know that the standard 100% servo travel limit won’t be enough, we’ll stay with no Extended Limits in the Model Set Up screen.  (We use the default for the class – no check)

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