Sabertooth 2x10

Lynxmotion
1

Hi,

I have a Sabertooth 2x10 and am operating it in RC mode, connected to a Futaba RC reciever.

I have the controller in a Lynxmotion 4WD robot in mixed mode and am concerned that it doesn’t always stop on loss of signal.

If I have the throttle part way open so it is moving and I switch off the transmitter, the robot carries on moving until signal is restored.

This is causing a health and safety issue where I work. Is there a simple solution to this issue?

Thanks

2

Do you have timeouts enabled on the Sabertooth? It’s switch 6 on the DIP switch, be sure it is on. Enabling timeouts will stop the motors if the signal is lost.

3

Thanks for the quick reply, but 6 is on.

The switches are

1 - off
2 - on
3 - on
4 - on
5 - off
6 - on

Do you know how long the timeout period is? I have never left it going for more than 2 seconds or so without signal before I dive in and cut the power.

Thanks

4

I am somewhat of a novice when it comes to RC mode stuff and don’t have any experience with the Futaba. I have used the Hitec 6 some on mine but don’t remember what the receiver does when it loses connection with the transmitter. On the DIY with the spektrum, it appears to set the throttle value and maybe the others to the values that were used when the transmitter and receiver were bound.

So the question may be when the futuba loses the connection with the receiver what does it generate on channel 1 as I believe this is what the Sabertooth is looking for.

Kurt

5

Thanks, I am going to try it out with a cheap 27Mhz set to see if it does the same thing.

It could be there is some kind of setting with the Futaba FF7 and its receiver that is holding the outputs upon signal loss. That would be desirable for an aeroplane, but not for a rover :slight_smile:

6

This is common feature for PCM transmitter/receivers. It’s usually referred to as fail-safe, and usually configurable. …I think.
natew.com/rcheli/frame_main. … l.PCMvsPPM