PatrickTri

Hello dear community, I have a question about the Mark2 conversion for the Ultimaker 2 Extended. I have the conversion completely finished and also functional. I would like to change the tool heads in the firmware. So the original head should become T1 and the additional head(Mark2) should become T0. Is this change easily possible ? I would be happy about an answer 🙂 Thank you very much. Greetings Patrick

Another Update: So something weird is happening 😄 I stored in Pins.h #define Servo0_PIN 13 in the Mark 2 firmware with Arduino IDE and now it's working. I can change the tool head and all the other features. BUT 😄 I can't reach the Servo with the command M280 P0 S30 or other angles. Instead it's working with M42 P13. Even if in config.h the Num servos is set to 1. Maybe i am missing something ?

So an update after some time: I decided to go with the Mark2 solution and printed and installed all the parts. The filament PA6 has a diameter of 1.75mm and the nozzle head and all parts accordingly converted to 1.75mm. The continuous filament has a diameter of 0.4mm. For this I have converted an aluminum extruder and milled a corresponding groove in a ball bearing so that the filament is guided correctly. The framework for the cutting tool is also ready and built. I was not informed about the change in filament diameter, so the first information was that both filaments are 3mm. Now I'm on the adjustment of the firmware and there came some problems. After some messages with @tinkergnome (Here again many thanks for all your tips and help 🙂 ) I am so far that I can adjust the firmware with Arduino IDE. Unfortunately the following problem has settled. No matter if I adjust a pinout in the original source code of the UM2 Extendend or in the Mark2 firmware, no traverse of the axes or the print bed can be done. As soon as I start a traverse, the printer becomes very noisy and it sounds as if the motors are all blocking. Installing the original Mark2 firmware works fine with all features. But as soon as I make an adjustment it no longer works. As soon as the pin is deposited and the servo function is activated in Config.h, the servo motor can be controlled via Pronterface (command M280 P0 S30) but no movement of the axes or the print head can be performed and the servo motor twitches at standstill. Example: in Pins.h store #define Servo0_PIN 13 and upload again via the Arduino IDE. Does anyone have an idea ? 😄

I got most of the parts. The Mark2 Board isn't available anymore but i will solder the wires instead. Both filaments are 2,85mm 🙂

Hey, thanks a lot for your answer @gr5. Sorry for the confusion 😄 I need a second nozzle because the printing process is roughly as follows. 1. printing the base material with one nozzle. 2. second nozzle with continuous fiber prints to the specific areas that need to be reinforced. (With the Slicer Aura you can place the fiber specifically) 3. just before the fiber is finished in one layer, the fiber is cut. (Command M280 is used here) The fiber itself is not printed because the melting temperature is much too high. The base material is PA6 and the continuous fiber is coated with PA6. So the fiber coating is melted and bonded to the base material. Therefore, I need a dual extruder. Since the UM2 was never officially launched as a dual extruder, I need an alternative. That's when I saw the Mark2. Here I would use the second extruder for the base material and the main extruder for the additional material (continuous filament), because here the cutting tool must be placed on the head. Unfortunately the board is no longer available on Aliexpress 😕 If you have any other tips, feel free to let me know 🙂 Greetings from Bavaria (Germany) Patrick

Hey, at the moment I am busy with the assembly of the second nozzle. In many threads I have read that an installation of a second nozzle for the UM2 Extended from Ultimaker was discarded as an idea. According to threads, there should be problems with heat transfer between the nozzles and also collision risk when printing. As a dual extruder conversion I have seen the Mark 2 and the DXU conversion. Which one would you recommend and do you know where the parts are available. Unfortunately, most of the links of the purchased parts for this are no longer current or the parts are no longer available. Do you know of any other rebuilds or ways to build a dual extruder @gr5 and @tinkergnome? I would be glad about an answer. Greetings Patrick

Thank you very much for your active support @gr5 and @tinkergnome. I am very grateful for it. I have looked at the GCode and when cutting the fiber, the following GCode is displayed/used. M400 M280 P0 S30 G4 P200 M280 P0 S90 M400 So the command is M280 as you have already described. At the moment I am designing the framework for the cutting tool. As soon as the ordered motor arrives I will work on the software to do the first test via Pronterface. Of course I will do the test in a disassembled state to ensure a proper control. If you have further tips please let me know. Thanks again for your support. I will give you some updates later 🙂 Best regards Patrick

Thank you very much for your answers @gr5 and @tinkergnome. In the attachment you will find the installed board. A connection for a second extruder is available, as far as I can see. The motor of the cutting tool has an integrated PWM control. The supply voltage is 6 V. So I could do it without a MOSFET right ? The question is: Which free connector on the board can I control with a specific GCode command and how can I select the connector? What would the command have to be to select a pin directly. If you would recommend a pin on the board, I would be very grateful. With the slicer software Aura I have generated a GCode for a fiber reinforced component. Looking at the GCode, I noticed that a separate command is used for the moment the fiber is cut. This command is for the printers of the company of Aura. The target is: 1. select free pin on the board of the UM2. 2. command to select this pin 3. replace specific command in GCode of Aura with the new command. If I forgot something, please let me know. I am very grateful for your help and your quick answers. Many greetings Patrick MG90S_Tower-Pro.pdf

Hello dear community, as part of a project I would like to convert my Ultimaker 2 Extended to dual extruder. The second nozzle should print continuous carbon fiber. The cutting tool for cutting the fiber and the matching slicer (Aura) is already ready. The carbon fiber and the base material (PA6) are also ready. The conversion to dual extruder will be done according to the instructions. To keep the original motherboard, I would like to control the slicing tool (MG90S motor with return spring) via a free output for additional fans (24V). The question is, is this possible and which GCode command do I need for this. I would be happy if someone has some advice. Thanks a lot. Greetings Patrick