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danilius

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Posts posted by danilius

    UM2 starts shipping with Olsson block included!

    in Coffee corner

    Posted

    First of all, kudos to Ultimaker for doing this (I bought an Olsson bock a while ago). This simply reinforces my confidence in them as a company, and the open-hardware economic model in general.

    The fact that Anders was able to market his product in the UM forums (essentially getting free advertising from Ultimaker) ultimately resulted in a really smart decision from Ultimaker.

    Secondly, I after I installed the Olsson block I printed a different shroud, and for some reason no longer have to use the fans, even on small pieces. I have no idea why, but I have been printing now for over two months without the fans on, in PLA, nylon and ABS. Yes, I have had some stringing, but that's mainly because the parts I print are generally not considered fit for FDM printing :) (they break every possible rule in several places)

    • Like 2

    What Would You Like To See In An Ultimaker 3?

    in UltiMaker 3D printers

    Posted

    Things I need/want in order of importance:

    1) Dual head for support

    2) Robert's feeder or similar, essentially a latching mechanism

    3) Olsson block or better

    4) wifi or bluetooth for uploading files - hate the SD card - and preheating bed

    5) automatic poweroff once the job is done

    6) 300mm x 300mm print area or larger - height is less of an issue

    7) Multi-head, so I can print with 0.15, 0.25, 0.4 and 0.8mm nozzles and support material in one job

    8) motors on the outside

    9) easily-enclosed build chamber

    10) top-mounted screen with better wheel design

    11) filament jam detection

    Things I don't need:

    1) Spool holder - I use my own

    2) Camera

    3) USB printing

    4) Wifi remote control of everything

    Layers do not stick with adjacent layers

    in Improve your 3D prints

    Posted

    I am still in two minds about the effects of moisture in the plastic itself. Plastic does absorb moisture (nylon is aggressively hydrophilic) and currently I keep all my plastic in sealed bags with silica beads. I have seen them change from amber (dry) to deep green (saturated) but have not had the time to conduct empirical tests. Currently I have not come to any conclusion on the subject because of the sheer amount of variables involved. Ideally I should buy some new nozzles, clean out the olsson block thoroughly and print saturated and unsaturated filament in some kind of test, although what that would consist of (essentially a shape in which we can easily determine the effects of moisture) is anyone guess.

    Suggestions?

    i Roberts Feeder a Problem

    in Third party products & modifications

    Posted

    Well this could very well be a temperature issue. The way the Olsson block will perform for a given temperature can be quite different than the standard one, so you might have to raise the temp for the equivalent print to the original block, and then the feeder will perform nicely.

    Another possibility is that the spring you have is simply not powerful enough, or you need a shorter yoke to add more pressure.

    As you can see by wandering around teh intarwebz, IRobertI's extruder with the Olsson block is simply the most sensible upgrade route one can take at the moment, it is a common combination, so you have done the right thing so no worries there!

    • Like 1

    ABS Warping

    in UltiMaker 3D printers

    Posted · Edited by Guest

    Having printed several hundreds of hours worth of ABS both very small parts and pretty large (longest print was 65 hours), I think your issue is not so much the ambient temperature, since you are printing a smallish part.

    First of all, all the blobbing can be down to too much or too little fan. Weird, I know, but at the moment I print ABS with the fans off. Even really small parts.

    Next, the temperature does not have to be so high. Try printing at 30/mms with the temp at 220C - 230C, layer height 0.1mm.

    Am I doing magic?

    in Coffee corner

    Posted

    @DidierKlein, you are right, the models are largish. Still amazes me though.

    @lRobertl, I did try enclosing the printer and printed at 260C, but it did not make a huge difference. PLA can clearly take way more of a beating than ABS. On the other hand, for master models that will be used for casting, I use ABS since the surface finish is way superior for some inexplicable reason.

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