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darkcrash21

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Posts posted by darkcrash21


  1. I'm actually printing an object right now and it's turning out well. All i did was wipe the blue tape with MEK (Methyl Ethyl Ketone), lower the print speed to 70% and raise the first layer temp to 215. Once the first layer was printed, I lowered the temp to 206 to keep it from plugging and raise the print speed back to 100%. I will have to figure out a way to machine out a heatsink to allow for active cooling below the PEEK.

    I'm not interested in printing Nylon as of yet. I just want to print PLA and ABS for now, which means my next step is to get a heated bed going. Trying to decide on glass or aluminum bed...


  2. ahh! you need a Bertho extruder and an Alaris V3 metal hotend with active cooling then!

    OK, i'm definitely getting one of these nozzles now. note that they are not compatible with V2 hotend incidentally.

    shame only makergear sell them, the shipping to UK will kill me :(

    Yes I will have to upgrade to the Bertho extruder one day. I haven't heard of the Alaris V3 hotend. I was thinking that cooling the hotend itself just below the PEEK would keep the PLA from plugging. It's great to have the high resolution prints, but it just takes too damn long to print. However, there are times when you need to print small high res objects, so this would be ideal.

    Once i setup everything properly, I will post my settings.

    I will try the glue to see if it helps with adhesion. I do have an aluminum plate that fits perfectly on the bed, but I dont have kapton tape. Do you really need the kapton tape even with the glue?


  3. Sorry if i wasn't being very descriptive.

    The issue comes down to the heat and the problem with extrusion. When i print with 220degC, I have no problems with the first layer sticking, however my print head gets plugs. It's plugs up really fast, less than 30 minutes! Due to the small nozzle opening, the plastic remains inside the print head longer than compared to the .4mm nozzle. Which means the heat starts to climb upwards on the print head.

    I had to start printing with 190-200. Problem with printing at that low of a temperature is that the plastic doesn't want to stick to the platform.

    The smaller nozzle also requires higher pressure to extrude the plastic. Which means the extruder would start slipping and create flat spots on the PLA. Of course the more friction you put on the PLA, the flatter it gets, and it would get stuck in the bowden tube :(. I would think, in order to use the .25mm nozzle properly, it would be best to use 1.5mm PLA as it would require less force to extrude 1.5mm to .25mm compared to 3mm to .25mm :). If that makes sense.

    I will keep playing with the settings until my V2 hot end comes in :)


  4. Hey guys,

    So i accidentally bought .25mm nozzles from makergear. I decided to see if it will work with the UM. I got the settings to work for simple objects with very little intricate turns, but with any 90deg angles, the first layer doesn't want to stick. The machine has to be very well calibrated or it wont work as the margin of error is very slim compared to the .4mm nozzle. Also print times are very long, as now you have to print even more passes per layer.

    Top belt tensioner is the .25mm, bottom is the .4mm. You can see the thickness of each pass on the .4mm, but it's very thin on the .25mm.

    photo4eq.jpg


  5. Hey!

    I've been lurking on this forum for a bit. I bought my UM several months ago and was printing all sorts of cool parts. Recently I got a plug in the hot end and bought the V2. However, it's been 3 weeks since the parts were shipped and I was dumb enough to not pay for tracking, so i'm guessing it's a loss. During those 3 weeks, I broke the nozzle and the brass threaded pipe, and I really want my machine up and running. Does anyone know where I can source the essential parts from a USA vendor? I'll probably end up paying for another V2, but it will take weeks for it to ship to me. If no one knows where I can source the threaded brass pipe and nozzle in USA, then can someone give me the correct sizes? Thank you very much!

    Mike


  6. Yes I would like to re-ignite this discussion about documentation for the Ulticontroller.

    Its very nice, and I use it for little things - but seriously is there not a .pdf somewhere just

    at least saying what the units are for each varible, what they do etc?

    For example fan speed ? what unit - radians per month ...what? Its definetly not in RPM !!

    Extrusion amount, cura set to 900, ulticontroller says something like +250..what does that mean? :?

    Calum Douglas

    I agree with Doug. It would be nice to have a documentation regarding the settings. However it does seem like some of the variables is from 0-255 or 8 bits of information? At least I think the fan operates this way.

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