no filament extrusion during xy callibration UM3

[YM3 0]

Hi, I have installed new printcores on my UM3, but during xy callibration there is no filament extruded from the nozzles. I find this strange, as filament is ok during material load and nozzles are clearly not blocked or anything. I have checked the temperature sensor as well, all fine. I did make a new setup with the Polybox edition II and removed the original spool holder with NFC cable.

But the filament is feeded all ok through the feeders and tension looks just fine, just the regular marks no grinding or anything. What could be the problem? I have not started to test with any prints yet, as I not able to finish the xy callibration with the new printcores, therefore have no clue what values to confirm for XY...

Has anybody else experienced this problem? Any feedback on the Polybox edition II setup with the Ultimaker 3? Is there something I am overlooking?

 

IT is really strange.

The problem with the automatic calibration of the Ultimaker 3:

The filament of extruder 1(PLA) does not flow until the Y part is almost finished and is printing the 'zig/zag' short lines.

The X part is printing fine with the extruder 1 (PLA).

However, extruder 2 (PVA) does not extrude any filament at all.

So, no change to read anything from the calibration print.

 

It does seem that the printer is working and extruding just fine with some test prints.

I have selected to print a prime blob first with these prints and filament is coming out nicely with both extruders, before the print head moves to the print area, leaving a smooth blob.

 

I'm not an expert yet with this machine.

What might be wrong? OR what am I doing wrong?

I did put back the NFC cable and spool holder, just feeding the filaments from the Polybox Edition II.

I have bowden tubes running from the Polybox to the UM3 and had to remove the bottom metal rings, in order for the bowden tubes to fit in the bottom end of the feeders.

However, the filament seems to be feeded just fine during printing and filament marks look ok.

I don't think that's the problem, but something clearly doesn't work properly anymore with the automatic xy calibration process from the UM3...

Edited April 1, 2019 by YM3

[tadas-sp 0]

The same problem. No extrusion on X/Y calibration because UM3 forgot to extrude a fillament from the nozzle before starting printing. After upgrade of newest firmware of UM3

Edited April 1, 2019 by tadas-sp

[YM3 0]

I now see that more people are having the same issue, due to the latest firmware update...

Hopefully this will be fixed soon!

[gr5 2,099]

@ultiarjan said he had the same problem and could see that the right core had retracted the filament quite a bit.  The workaround was that when it starts printing with the right extruder, left the lever on the extruder and slide the filament in all the way and then let go.  It seems to me you could even do that earlier on while it's printing with the left extruder.

[joshcando 0]

I have the exact same issue and can't use my printer without this calibration as i need the accuracy! Can someone tell me how to wind back the firmware?

[gr5 2,099]

Winding back the firmware on the S5 is highly discouraged as there are high voltages under the printer.  Or you can just do the "manual extrusion" method I posted above since new firmware should be out within a few weeks.

 

The UM3 isn't so bad to "rewind":