[Error] Serial Output "E"

Hello, Developers.

I'm using Marlin Firmware and Ramps 1.4(with arduino)

I found very serious problem.

When I plugged my extruder to the board, I can see "E" at arduino serial monitor and the system died.

However, I can't find any code about the "E" in Marlin Firmware. Why the "E" is appeared?

Here is copy of my Serial Monitor :

start
echo:Marlin1.0.0
echo: Last Updated: Apr 2 2016 17:46:59 | Author: (hello, world)
Compiled: Apr 2 2016
echo: Free Memory: 24508 PlannerBufferBytes: 1344
echo:Hardcoded Default Settings Loaded
E


Thanks for reading.

E could be anything including garbage on the serial line


Most common cause of controller lockup like that is three wire switch based endstops on backwards shorting 5v to gnd (this can also destroy you voltage regulator on the mega)

Edited 1 time(s). Last edit at 04/03/2016 03:25AM by Dust.