AX2850 spurious Estop

I am using an AX2850 and am having a problem with spurious estops. When the vehicle is asked to accelerate or decelerate quickly, occasionally the controller will detect an Estop. I am using the estop functionality in the controller, and I have a switch connecte that should pull the Estop to ground. However, this is never pushed. I\'ve swapped out the entire wiring harness and swapped controllers trying to track down the source of this problem. Nothing has solved it.

When the vehicle stops, querying the state of the controller with ^89 returns 80, indicating an estop. Using ?i to get the state of the inputs, I get 01 00 01 indicating the Estop switch is high (not pressed).

I don\'t understand where this spurious estop is coming from. Any ideas how to solve this?

The e-stop that you are using, is it a switch, or some sort of relay connection in your setup? I assume that this is plugged into your +5V and your Input E or F.

It is a switch.

Is this switch wired between your +5V and your E or F pin? Or is this wired to GND and E or F pin?

The switch is wired between pin 15 (the ESTOP / INV pin) and ground.

place the pin that is in gnd and connect to 5V, so that when the +5V goes high, the E-stop activates. When it isn\'t high, then no e-stop should occur.

+5V(pin 14) and Pin 15.

On the AX2850, the ESTOP input has an internal pullup resistor to +5V. To ESTOP the vehicle, the switch must pull that input to GND, which is how my circuit works. It works most of the time, only failing when the vehicle accelerates or decelerates sharply. That is why I think that there may be some kind of electrical noise causing this problem.

Try using a switch that does not have this +5V internal resistor and see if wiring a regular switch from the pin 14 and pin 15 works.

It is not the switch with the internal resistor. The AX2850 itself has an internal pullup resistor.

Try removing the external battery and see if the radio stays on. If this is the case, then most likely the radio and the servo are powered from the same source.