garaha2012

looks good, start a print soon.

I hope using your hint to save as "project", I hope this gives enough information. Gunther MFORU_Brücke_x.3mf

ah, "not overridden", that's it! I keep searching anyway.

Hi Tinkergnome, thanks for the hint to choose Marlin, have changed it, but no progress. Maybe you see something in the file. Thanks and kind regards Gunther MFORU_Brücke 3b.3mf

ah, you asked to upload 3mf files, here they come: MFORU_Brücke 3.3mf UM3E_Brücke 3.3mf

Just in case it helps to look at my files I enclose the two g-code files. MFORU_Brücke 3.gcode UM3E_Brücke 3.gcode

Hi Tinkergnome, good that the old experts are still around. I am so glad to get some response so fast. Now, I changed filament in Extruder 2, just to move it around, that work fine. So I think it is not a mechanical problem on the printer. But I studied Cura more in depth, and to me the problem lies there. The screen does not show the use of extruder 2, just Extruder one and no support tower. Also when I wanted only to print with extruder 2 it automatically started with Extruder 1 alone. I have no clue to get Cura right. I also used the same file on my Printer Ultimaker 3/ Cura, and it seem to print correctly with both extruders, or rather it creates the correct file. I enclose some screenshots. I hope that helps. Your tip to check the g-code sounds right, but the Cura surface already shows this fault. Thank you and kind regards Gunther

Hi, Experts, I had long been happy with my Mark 2 upgrade. Now I found that the second print head does not work. if in Cura I want to start a dual print, it only uses Print head 1. if, as a test, I want only print with the second extruder only (specified in Cura) still only the first Print head prints, not the one I had chosen. any advice from the Mark 2 Experts? kind regards Gunther

Hi, everyone, congratulation for the great work yyh1002, very impressive! l do have a question: The hot end unit that moves up and down surely has some play in it otherwise it would not move up and down. When the hot end is in the down position how is the unit held in its precise x-y-location? On my UM3 the precision comes from the spring pressing the moving hot end unit down against a tapered seat in a metal part at the bottom of the head. Which part or which lay-out in your design ensures the x-y-position precisely? Or do I expect problems where there is none?? Thanks and sorry to ask this after everyone says it prints fine.

Great! Sounds spot on.

Hi Experts, for my Mark 2 UM2 I want to use Cura 4.0. Are the current Mark2 resource files suitable? When I want to activate the Mark2 UM2 in Cura 4.0 I get the following error message and do not know how to correct my files: See enclosed screenshot. What can I do? Or stick with Cura 3.3.1 ? Thanks Gunther

I have my "UMO 2+" with mark2, which is beside the wooden frame an UM2.. And then I only have one interface. Can Duet be used with Tinker mark2 firmware??

Oh, great. That solves it then. Thank you. Gunther

Hi experts, I am thinking of building a larger printer using the Jennyprinter 4x340 as mechanical base. Build size would be 340 x 220mm. I intend to use Ultimaker 2 electronics and also upgrade to mark2 dual extrusion. My question is: Do I need a special version of the firmware or is it sufficient to adjust the size in Cura? Thanks Gunther

Hi morfeushav, I understand that the lifting is through the wave spring on each side and the extruded "active" filament presses the relevant nozzle down. Once retract the nozzle goes up. That part is quite ingenious in its simplicity. I do not fully understand why this needs water cooling.