USB connection failed

T3P3Tony

@urba its sounds like something in the wiring had caused the wrong voltage to get to the wrong place on the duet board.

initially you setup the duet using USB and got WIFI working correct?

Once that was working you then powered the Duet by 24V?

While the duet was connected to 24V you plugged in USB and something flashed (what?)

With the Duet connected to USB and nothing else (no endstops, or anything else plugged in other than the USB cable) and you press the erase button does the Duet show up as a "bossa programming port" or "unknown device"?

Urba

Thank you for your quick reply.
Yes, I have set up the Duet with USB the WIFI has worked.

Then I operated it with 24V. Everything worked fine, I could drive with the axles, switch the heating on and off, the end stops have already worked.

Only the WIFI had broken off, had to reconnect again and again.

I did not see exactly what was flashed, turned it off because of fear of destroying it. I know this is not exactly helpful information for you.

I've now removed all the cables after your tip and only plugged in the USB cable, pressed the erase button.

In the device manager of Windows, no new device is displayed, nothing new is displayed. Have already used another USB cable and another USB port.

The 3V, LED and the LED between the reset button and the USB connector are on, the 3.3V LED is off!
0_1530363851939_DSC_0003-min.JPG

Urba

No one has an idea that can help me, would be great

dc42

It looks like the 3.3V supply is not present. Are any of the ICs or the WiFi module on the Duet getting hot?

Urba

No, nothing gets hot.

dc42

Have you disconnected everything from the Duet except USB?

Urba

Yes, I have everything except USB disconnected from the Duet.

dc42

In that case we would need to examine your board to see what is wrong with it and whether it can be repaired economically.

Urba

Ok, where should i send the board?

dc42

Please make a warranty claim from whoever you purchased the Duet from. If you purchased it direct from duet3d.com then see https://www.duet3d.com/warranty.

Also see the notes about USB ground loops at https://duet3d.dozuki.com/Wiki/USB_ground_loops.