Replacing X8R with RX4R receiver causes issue

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Scarfie
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Joined: Wed May 06, 2020 11:57 pm
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Replacing X8R with RX4R receiver causes issue

Post by Scarfie »

Hello. I'm new to the forum. I'm looking for some insight to a problem I've encountered. I am using an TaranisQ X7 with an X8R receiver to control pan and tilt on a gimbal. I want to replace the X8R with an RX4R for a few reasons - mostly because I only need 2 channels. I've flashed matching firmware to each receiver and to the transmitter - they all match and I can bind both receivers.

I bound the X8R to model 1 in the X7 and bound the RX4R to model 2 so I can switch between them easily.

The X8R performs flawlessly. When I switch it out with the RX4R and as soon as it is bound with the transmitter, the gimbal starts moving arbitrarily on both axis.

Here's a link to video I posted demonstrating the issue. You can see the gimbal freak out when the RX4R is bound.

It seems like the PWM signal must be different from both receivers - I'm at a loss for what to do next to try to tune it. Any ideas? Thanks.

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Kilrah
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Joined: Sat Feb 18, 2012 6:56 pm
Country: Switzerland

Re: Replacing X8R with RX4R receiver causes issue

Post by Kilrah »

You've got the RX4R in fast PWM mode that the controller doesn't seem to support, see manual to configure it to normal speed.
Scarfie
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Joined: Wed May 06, 2020 11:57 pm
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Re: Replacing X8R with RX4R receiver causes issue

Post by Scarfie »

According to the manual it defaults to FS mode (sollid green led only). Signal pins on channels 1 and 2 need to be jumpered when binding to set it to HS mode (solid green and blue leds). I tried every which way to bind in HS mode but it won't do it. It only starts up with solid green led only - FS mode. Isn't FS mode the slower 18 ms mode and HS the faster 9 ms mode?

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