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2.4G Spektrum Radios Spektrum 2.4 Gigahertz Radios and Technology


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Old 02-13-2021, 03:24 PM   #1 (permalink)
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Default iX12 and a GY401 gyro

Sometimes I am not the smartest pencil in the desk.... I am playing around with a older Helicopter with a GY401 gyro and I am trying to be able to toggle between rate mode and heading hold mode.

I can only get heading hold mode and can't get it to rate mode toggling my switch. What am I missing.
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Old 02-13-2021, 04:43 PM   #2 (permalink)
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I found a manual for the Futaba GY401.

It looks like the gyro changes modes based on which side of the center point of channel input would be. In Spektrum terms, it will behave one way if you send it a value from -100% to 0%, and the other way from +100% to 0%.

You can use the Monitor screen to check the value of the channel you're using for the gyro and see what it is for each position of the switch.
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Old 02-14-2021, 12:59 AM   #3 (permalink)
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There is no input on the GY-401 that toggles between Rate Mode and Heading Hold. There is only the gain input that can be used for this.
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It looks like the gyro changes modes based on which side of the center point of channel input would be. In Spektrum terms, it will behave one way if you send it a value from -100% to 0%, and the other way from +100% to 0%.
Since there is no dedicated input to switch between HH and RM, the tail gain setting is the only way to "switch" it.
The Gyro function in the transmitter is tied to the Flight Mode switch and there are 4 different tail gains that you can set (Throttle Hold, Norm, FM1 & FM2). You can have one or two tail gain settings that are in the plus-range (HH) and one or two tail gains gain settings that are in the minus-range (RM).
Then it will switch between RM & HH depending on the FM / TH switches

Or, separate out the channel that is used by the Gyro gain (gear channel I think) and dedicate that to a 3-pos switch on the transmitter.
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