T3P3 Kossel XL+ connection PanelDue to Duet-Board lost

T3P3Tony

@kolja thats a strange problem, can you triple check the connection between the PanelDuet and the Duet please

kolja

@t3p3tony Will do so when getting home again (tomorrow evening or thursday). Theoretically nothing physically should have happened as the printer didn't move and is standing like a brick.

kolja

@t3p3tony Righdo. Unfortunately now the whole printer seems to go funny. Coming back home this evening i switched it on. Situation with Touch-panel kept as described above.

Now, 2 hours later, when switching on, the following happens:

Touch-screen doesn't even switch on - obviously no power (cable's connected properly)
hotend-fan is directly starting although hotend's still cool
web-interface is starting, but showing "heater 1 fault" error, temperature's showing 2000°C (no matter, wether printer's only powered via USB or via 24V)

Next try, cable completely disconnected from PanelDue Touch-screen:

hotend-fan working as desired
web-interface not showing an error anymore

So probably there's a problem with the ribbon-cable or the Panel-part itself.

dc42

If it's not the integrated PanelDue, does the Duet work when the LCD is disconnected from the PanelDue controller but the controller is connected to the Duet? If so then perhaps the screen is drawing too much current.

kolja

@dc42 Dave, i'll give that a try. Let's see, what happens (if so, i'd wonder why it used to work flawlessly the last weeks).

kolja

Ok. As follows (switched off printer between steps):

try - ribbon 2 board | touch off
no error
ribbon 2 board 2 touch
error
r 2 b
no error
r 2 b 2 t
display lighting up, "connecting..." (so no temp-error, no fan)
r 2 b
no error
r 2 b 2 t
error (fan, temp wrong)

the cable itself visually looks alright. didn't get my hands on my multimeter yet. reckon checking the cable for contact on each wire would be next step?

kolja

Another check before fiddling with the multimeter (kept on printer between steps):

Switch on printer - ribbon 2 board 2 touch
error (fan, temp 2000°C)
While running disconnect board from touch
error disappears
Directly attach board to touch again
error again

Can reliably repeat 2 and 3. So my guess: Ribbon-cable's fine. The touch-display seems to be the source of error. Can somebody confirm or point to a more detailed check? Thanks in advance.

dc42

Does it make any difference if you provide power to the PanelDue through its USB port?

Can you confirm that the 5V regulator on the Duet is enabled? If so, does the small square chip U3 get hot when the problem occurs?

kolja

@dc42 said in T3P3 Kossel XL+ connection PanelDue to Duet-Board lost:

Can you confirm that the 5V regulator on the Duet is enabled? If so, does the small square chip U3 get hot when the problem occurs?

How can i confirm the 5V regulator is enabled?
Where do i find the information which chip is U3?

dc42

The 5V regulator is enabled if you have a jumper across the INT_5V_EN pins, see the wiring diagram at https://duet3d.dozuki.com/Wiki/Duet_Wiring_Diagrams. The alternative is that you are supplying 5V power to the ue through its USB connector or through the EXT_5V connector.
U3 is close to that jumper and has "U3" in white lettering on the PCB close to one corner of it.

kolja

powering the PanelDue via a strong USB (capable 2A+)
- USB + Printer on: no change, display off, temp-error, fan blowing
- USB alone (Printer off: display off)
INT_5V_EN: enabled
U3
- touch connected: U3 cold
- touch dis-connected: U3 cold, errors disappear

dc42

@kolja said in T3P3 Kossel XL+ connection PanelDue to Duet-Board lost:

USB alone (Printer off: display off)

That's not right. With the PanelDue powered from USB and the printer off, the PanelDue display should be on and showing "Connecting" even if the it isn't connected to the Duet. Perhaps your USB PSU has failed?

kolja

@dc42 The usb-psu is working properly. i'd say, the touch-screen just doesn't say anything anymore.

Re-checked just a minute ago. The display is not showing anything no matter where or what power it's getting (printer on alone; usb powering the duet-board with leds properly on).

Powering the duet-board by USB always switched on the touch-screen before the problems occured. Right now nothing's happening anymore except that the 2.000°C-error + fan blowing is happening when the full connection duet-board - paneldue-controller-board - touch-screen is established and printer's powered.

My guess would be that the touch-screen has an error/is broken. Do you think the same?

dc42

I suspect the touch screen is broken. However, the touch screen will also be off if the firmware has been erased.

kolja

Yes. But probably firmware couldn't be gone, popup again once and be gone again from then on - although not being impossible. And that would also not account for the temp-error troubling the whole system once touch-screen is hooked up to controller.

Thanks Dave for your help. Really much appreciated! I reckon that it helped Roland, too.