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Everything posted by chenci

  1. chenci

    Help with printing

    Hi, i'm having some issues with a 3d printing. It happens especially in flat surfaces like this box i printed. You can see there are a lot of uneven surfaces and gaps between the lines. I'm not sure if it is underextruding. The first two layers are perfect. The problem happens in the last layers. Also i have calibrated the steps/mm and i use PLA at 205° - 0.4 Nozzle This are my settings: I use 60mm/s print speed but strangely, it prints at 30mm/s average. Thanks for any help.
  2. chenci

    Help with printing

    Hi, thanks for the reply. As i said in the first post, the first two - three layers are perfect, doesn't have any artifact or small waves. The problem happens in the last layers. I will level the bed and try again.
  3. chenci

    Help with printing

    Yes i measured the filament diameter, it's 2.85 to 2.9. I've uploaded new photos. There are blobs but very small. Mainly i get an rough surface that feels like touching a fine sand paper. I still have my doubts, is it under-extrusion? or over-extrusion? I use Flow100% Retraction 6.5mm at default speed. Firmware Tinkergnome 17.02.1
  4. Hi, i'm trying to maker a modular printhead easy to change without disconnecting the cables from the mainboard. The fans are easy, but how should i do it with the temp sensor and the 35W heater. What types of connectors should i use for them. I want to put all the connector in the "Print head top" so they are easy to connect and disconnect when i switch from one to another. Someone must have done it before me. Thanks in advance
  5. Indeed, it works, in Cura pay attention you also need to change the extruder# for priming/brim/support And quality wise, you'll always get the highest quality on the main head, simply because you're printing with a head with less weight. This is because i want to use the second extruder with 1.75mm filament and i don't want to change the settings. This is just for experiment.
  6. Hi, quick question. Is it possible to make your second printhead your main extruder when you print one color? Thanks
  7. Hi, the ultimaker2_mark2.def.json file in git is fixed now? Or do we have to fix it manually? Thanks
  8. Man that's sick, i can see you really love modding your printer. By the way, it seems you were the first to use the molex 8pin! I stole your idea. Dude, we want to see your step files!!!hahahaha Thanks for taking your time.
  9. Man, your mod is awesome! I won't be able to do something so cool (I don't have access to CNC machine). 1) Do you have the link to the original post? 2) Did you just use PCI-E 8 pin connector? 3) You got to help us with more pics and stls haha Thanks for taking your time with the photos.
  10. Right click -> download will work fine. Or you could download all the files with the button clone or download
  11. Just visited the website. Great tutorial! When the second extruder arrives, i will test and post pics. Quick question. I have the UM2+ extended. Which firmware should I use: Mark2-dual-ext-17.02.2.hex Or Tinker-Mark2-extended-dual-17.02.2.hex I don't know if there are any differences?
  12. Yeah i would like to know too. And also of course if this week we are going to have the BOM. Thanks
  13. And just in case you can't get one. You can build a Y Molex extender to connect both hotend fans to the same PWM FAN without cutting the cables (just in case you want to preserve the original cables to keep the machine value or just because) Video tutorial showing how to make a simple Y molex cable to connect both hotend fans: Nice tutorial! It will be handy when the mark2 comes out! Thanks
  14. It's simply a small PCB that adds additional fan drivers so the fans on the second head can be controlled individually. As the main board lacks any (unused) buffered outputs from the microcontroller, I put together a little board with the missing driver transistors. Hi, thanks for the answer. I think the question for everyone is can i still use the second extruder if i don't have that board. Or if that board is missing, is it still possible for dual extruding with 2 printheads? Thanks
  15. Hi, just got the Ultimaker 2+ extended and start tinkering around. I download this nozzle-mag and i tried to print the mount (see last picture from the author). I set it up to 0.08mm layer height and 35mm/s of speed as the author suggested. The result is this picture. I don't know where to begin to fix. I'm using 3.0mm PLA with 195°c/65°c and 67% flow rate. I got this setting from my PLA supplier. Using 0.4mm nozzle. Do i have to use a small nozzle? I have these nozzles: 0.25 0.8 0.4 0.6 Any help would be greatly appreciated.
  16. Hey nice idea the remote control, i figure that i can use the PCI express 8pin power cable (a have a lot of them from broken PC power supply) and mod that to take all the cables. 8 cables: 2 for heater 2 for sensor 2 for hot end fan 2 for shroud fans It's also easy to connect
  17. Yeah, you seem to read my mind. Do you have more information about it?
  18. chenci

    Issues with 1.75mm UM2+ extended

    Haha me neither, either way i will try when the new heater arrives
  19. Hi, i'm having troubles using a custom 1.75mm extruder. I bought a kit (see pics below) that has everything needed for 1.75mm. Even a 2mm bowden tube. Settings: i found out the best setting to print my filaments (makerparts 1.75mm) is this 46% Flow 200° temp 7.5mm retraction The results are this At first you get a clean first layer, but every time the extruder passes above the layer, you get a small line (see pic), after 3 or 4 layers of printing, the results are worse like the last image and you have to abort the process because the nozzle is "hitting" the 3d printing making a weird sound. I tried: lowering the temp or using more temp changing flow setting only get matter worse setting more than 8mm of retraction doesn't change anything. Less than 7mm you get the last image in the first layer The feeder that i am using is a Chinese one (it works, i don't think is the best). Anyone has the same problem?
  20. Nice. Definitely looking forward for this. What is the mark2 printhead expansion board from the video?
  21. Someone is in a hurry. I'm still waiting for my second extruder to arrive.
  22. chenci

    Issues with 1.75mm UM2+ extended

    It's a problem related to the heater itself. It doesn't rise the temperature at all, that's why the heater error. And it's not a firmware related problem (I tested with original um2+ extended firmware from cura 2.4 and it still has the same problem). I will change the heater when the new one arrives and test it again.
  23. I'm working on it. Almost ready. Will be ready early next month when all files get released. . Cool, be glad to tested it out next month.
  24. Hi, i'm planning to install some color LEDs, does anyone know the type of LEDs UM2+ extended uses? Watt? Volt? Thanks

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