No connection - need WAC

chrishamm

@gabit What firmware are you using? It may be outdated, so consider upgrading. If the network connection is lost in regular intervals, consider assigning a fixed IP address.

gabit

i tryed also a fix ip Adress, nothing changed in the past.

my start of the actual config.g
; General preferences
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"cnc" ; set printer name

; Network
M551 P"******" ; set password
M552 P0.0.0.0 S1 ; enable network and acquire dynamic address via DHCP
M586 P0 S1 ; enable HTTP
M586 P1 S1 ; enable FTP
M586 P2 S0 ; disable Telnet

How can i get the firmware version of a not running system?

gabit

i can get a serial connection to the board, it does not apear

chrishamm

@gabit Please share the output of M122 from the serial console so we can see what firmware version you are using.

oliof

is this a standalone or SBC (Raspberry Pi) setup?

chrishamm

@oliof He's using a Duet 2 Ethernet so standalone mode.

gabit

@chrishamm i can get a serial connection, it is not listed via ls tty.*
also on pc, i tryed also 3 diffrent usb cables

gabit

i tryed via a raspberry connection.
there i see the ttyAMA0 device

When i connect i get no prompt and can not send any command

i think the board is out of order

gabit

And now??
Who to get a WAC??

gabit

@chrishamm
Hi, what are the next steps?
I need my printer and i´m looking for a resulution

alankilian

@gabit

Have you followed the process described on THIS page?

Step 1, disconnect EVERYTHING and plug in just a USB cable between the board and a computer and tell us what lights are lit.

gabit

Yes I did
2 red led
Power and 5v
Nothing at Ethernet plug also cable connect
The same with removed sd card

gabit

the red power cable is not connected

alankilian

@gabit

If the red LEDs are lit but not the green 3.3V LED then most likely there is a short 
between the 3.3V power rail and ground.

Since you have everything disconnected, you should not have a short, so I think your 3.3 Volt regulator has failed.

Several people have had this happen when trying to connect endstops or BLTouch sensors and they accidentally connect the 3.3 Volt supply to ground.

gabit

@alankilian said in No connection - need WAC:

ral people have had this happen when trying to connect endstops or BL

we could this happen, the board disconnected in a printing pause. Nothing can be create short on the board.

alankilian

@gabit

Do you have a volt meter?

You could check the 5 Volt input on U2 and the 3.3 Volt output on the same chip and see if it has failed.

I can provide a diagram if you need it.

Phaedrux

When and where did you purchase the Duet?

gabit

@phaedrux
19.04.2021 by filafarm (berlin/germany)

gabit

@alankilian
yes i have a multimeter, but dont undersoot where to messure

at the expansion connector
between 1-2 -> 4.5V
between 3-2 -> 0,2V

alankilian

@gabit

Put the ground probe on pin #4

What is the voltage at pin #1? It should be 5.0 Volts.
What is the voltage at pin #3? It should be 3.3 Volts.

If you get zero volts at pin #3 you should disconnect EVERYTHING on the board and measure the resistance from Pin #4 and pin #3.

If you get a resistance of near zero Ohms, something on the board is shorted.

From experience here on the forums, I would theorize that while your printer was powered up, something caused a short on the 3.3 Volt supply and the voltage regulator U2 failed. This can be caused (depending on your wiring) when an endstop wiring bundle gets worn or pinched etc.

If you are capable of replacing U2, you might be able to get it going again.