reibuehl

If you can print with different materials, then a PETG layer between PLA support and PLA print item might be a solution. I found this in a (German) video: https://www.youtube.com/watch?v=Matf1Mna2zI&list=WL&index=1

Okay, I will check with them.

Okay, so I would need a new motor anyways? I checked the Bondtech extruder and that one also states UM2+ as a requirement so it also might need the longer motor shaft?

Hi all, I am planing to upgrade my UM2 with the geared feeder from the UM2+. As my UM2 already has the UM2+ hotend, I would like to avoid the high cost of the full UM2 Extrusion Upgrade Kit. If I understand it correctly, the new geared feeder requires a reverse direction of rotation. Is there a reason not to do this reversing just in the firmware (I use Tinkergnomes Firmware) and keep the UM2 feeder motor? Reiner

Ich würde in Cura die Anzahl der Outside Walls hochsetzen (von 2 auf 4 z.B.) und mit 100% Infill drucken. Wenn es die Geometrie bzw. die gewünschte Auflösung des Bauteils zuläßt, dann eine möglichst grobe Auflösung (>=0,2mm) wählen, damit Du möglichst wenig Schichtgrenzen hast, da an denen vermutlich am ehesten Undichtigkeiten entstehen.

I created one myself and contributed it to Cura. You can find it under Add Printer -> Non-Ultimaker Printer -> Add a non-networked Printer -> TinyBoy -> TinyBoy Fabrikator 1.5 in any Cura version 🙂

Gemacht habe ich das noch nicht, aber möglich sollte es sein. Die Extruder Module brauchen STEP und DIR vom Microcontroler, die liegen am ATMEGA2560 auf PL7 und PL6 (E0) bzw. PL0 und PL2 (E1). +5V und GND findet man auch leicht, die +24V Motorspannung und Motorspannung GND sollten an den Pads von C70 (E0) bzw. C71 (E1) anliegen. Die vier Motorausgänge kann man direkt an die Pins der Stecker oder auf der Unterseite auf die Testpunkte TP58-61 (E0) bzw. TP62-65 (E1) anlöten. Die Pins am ATMEGA anzulöten ist warscheinlich das schwierigste, der Rest sollte halbwegs gut machbar sein.

Falls doch mal der Treiber auf dem Mainboard durchbrennt gibt es zumindest auf den UM2 und älteren UM2+ Mainboards ja noch den zweiten Extruder Anschluss. Den kannst Du auch verwenden, Du muss dann halt nur die Pins für Extruder 0 und Extruder 1 in der Definition für MOTHERBOARD == 72 in pins.h tauschen und die Firmware einmal neu compilieren.

Normally PLA should stick on the glass without additional glue. I only had issues when the glass wasn't clean. Cleaning it with Isopropanol did help then. I usually wipe the glass plate with Isopropanol every few weeks and don't use any glue stick. Instead of putting the whole plate in the freezer, you also can try to cool down the print with a can of compressed air while it is still in the printer. I do that sometimes when I am too impatient to wait for the print to cool down on its own 😄

@gr5 do you have a link to the meduza 2X upgrade you mentioned?

Digging further in the @tinkergnome Firmware source, I found this in UltiLCD2_menu_print.cpp that seems to be responsible for the move: void lcd_print_pause() { if (!card.pause()) { card.pauseSDPrint(); // move z up according to the current height - but minimum to z=70mm (above the gantry height) uint16_t zdiff = 0; if (current_position[Z_AXIS] < 70) zdiff = max(70 - floor(current_position[Z_AXIS]), 20); else if (current_position[Z_AXIS] < max_pos[Z_AXIS] - 60) { zdiff = 20; } else if (current_position[Z_AXIS] < max_pos[Z_AXIS] - 30) { zdiff = 2; } char buffer[32] = {0}; #if (EXTRUDERS > 1) uint16_t x = max(5, int(min_pos[X_AXIS]) + 5 + extruder_offset[X_AXIS][active_extruder]); #else uint8_t x = max(int(min_pos[X_AXIS]), 0) + 5; #endif uint8_t y = max(int(min_pos[Y_AXIS]), 0) + 5; sprintf_P(buffer, PSTR("M601 X%u Y%u Z%u L%u"), x, y, zdiff, uint8_t(end_of_print_retraction)); process_command(buffer, false); primed = false; } } I don't fully understand the code though. Does this mean that the head moves to absolute X=5 and Y=5 and relative Z = +70? Would it be possible to execute this function instead of whatever M600 does?

When pausing a print for a filament change via the front button on the UM2, the head automatically moves to a park position in the front left corner and lowers the build plate. However if the pause for filament change is initiated via the M600 command in G-code, the head stays over the part and makes it impossible to extrude the filament during the filament change. I use the @TinkerGnome firmware. In the firmware source it seems M600 can take optional parameters for the head parking position: // M600 - Pause for filament change X[pos] Y[pos] Z[relative lift] E[initial retract] L[later retract distance for removal] But what values should be used to get a similar behaviour like a pause from the front panel knob? And do I have to add a manual move back over the part or will this be done automatically? I use Prusa Slicer 2.5 to generate the g-code.

Reichelt vertreibt einige Teile wie Düsen, Heater, Temperatursensoren und PTFE Tubes.

Looks like it is the thinner one of the two. That is the temperature sensor: https://www.reichelt.com/de/nl/pt100-b-sensor-voor-ultimaker-2-um2-pt100b-sens-p150009.html?CCOUNTRY=445&LANGUAGE=en&GROUPID=9298&START=0&OFFSET=16&SID=95c8e9d9f876e3374f637cc55f70100fa5bfbd471d5f52fbb55ca&LANGUAGE=NL&&r=1

Does such a PDF also exist for the UM2 (without plus)? UPDATE: Never mind, I found it at https://cdn.webshopapp.com/shops/272930/files/318145754/photobook-um2.pdf