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mattgriffin

Team UltiMaker
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Everything posted by mattgriffin

  1. Oh, this is handy! And you are loving this for CPE? I can imagine this strategy working great for PLA because you can snap and break away these tendrils so much more easily. But I have to admit to not printing much CPE with a 0.25mm nozzle. Do you have a go-to CPE mechanical demo print that comes to mind that I should try your method for? While I wait for your reply I'll pick an old standby calibration object, but I'll bet you have some favorites. ;-)
  2. So far, the suggestions I'm receiving offline (and elsewhere in the forums) include dropping fan speed to 50%, increasing the Support Z-Dimension gap a bit, and thinning out the top skin a touch. I have tried a few configurations -- would love to hear mastery from other users of CPE or other co-polyester variants.!
  3. Hey folks! Running a few experiments with CPE in various colors, attempting to determine between CPE and the new Ultimaker ABS formulation, which is better for quick fit-test prototypes of mechanical parts. My theory was that I would like CPE better, despite the lower warp ABS formulation. However, while testing i've noticed that the support structure generated in Cura 2.1.2 for CPE doesn't seem to behave like support structure for ABS. And I realized that I have no idea how to think about support differently for polyester materials. I suspect that the fact that most PLA and ABS materials have some sorta silica elements as filler materials -- which makes it easy to snap them easily if you score them. But the PET family materials tend to stretch before the break instead. Have any of you come up with some adjustment to support settings when using CPE that really makes you happy? The material itself, I really really love when I don't have tough support removal issues.
  4. Hey folks! I'm fighting "toolmark" scratches that can happen on flat top surfaces with bowden-based printers when using the marlin-targeting slicers like Cura and could use help. The slices don't tend to actually be toolmarks from the nozzle, but are from tiny bits of ooze that cool in place below the nozzle and can scratch the piece if the toolhead is moving with enough force. I'm printing a whole host of smooth flat objects like the file above (designed by Michael Curry), and would love to hear the strategies that you folks are using to get around this! #1 - Activating Combing, Increasing retraction length, Trying z-Hop (ie what didn't work for me yet) My first guess was that I needed to ACTIVATE combing, tune retraction, and try z-hop -- but talking with some hardcore slicing optimization gurus like George and Simon, I learned that most folks are actually finding that doing the opposite of expectations because the current cascade does not produce the intended results. Also, what elements of combing and retraction + z-hop in Cura are currently in active development? I'd like to troubleshoot with a lot of printing and bracketing, and don't want to mess up and find a workaround for a feature that is actively changing! #2 - Hiding scratches in other skin strategies The suggestion to jump to concentric skin top/bottom layers does help (as you see above) but does feel like a cheat because there really are still tiny scratches. #3 - Injecting manual gcode for either skin-only z-hops or to redirect the travel away from part without using combing This seems promising -- I have tried this a bit, but am feeling like I should either use or try to create a plugin. Because this is frustrating with so many materials to experiment with, with different profiles to open! #4 - Cura slicing tool sorting hacks This is beyond my skill set, but i've heard that fixing this for flat objects in specific can work in tools like Cura and Slic3r by flipping the order of the slicer tools related to retraction and travel -- and that a large part of the issue are complexities introduced by acceleration strategies making it more difficult to make sure that ooze is not an issue. If anyone has an active experiment working along these lines, i'd love to learn more!
  5. DATE: Thursday, December 3rd, 2015 LOCATION: fat cat fab lab, 224 West 4th street, Second Floor, New York, NY TIME: 6:30pm - 09:30pm Come celebrate December 3rd / global 3D Print day with us at Fat Cat Fab Lab and explore the power of digital manufacturing together! Join 3D Hubs and Ultimaker for an evening of fun, sharing, and 3D printing. Makers from all over NYC are invited to participate. Refreshments will be provided. We are looking to make Thursday night meetups at the Fat Cat Fab Lab a regular thing, so make sure to show up if you have suggestions for talks and topics that would interest you in 2016! And also check out our OLSSON BLOCK CLINIC! If you have an Ultimaker 2 and have been wanting to install and tune your Olsson Block, we are setting up a table as an Olsson Block Clinic -- so you can get help getting this setup, with a backup set of hotends and temp sensors in the unlikely chance that you'll tweak your sensors swapping to the Olsson Block. Pssst.....we will have a set of two Olsson Block sets available for the first two UM2 family machines to arrive to the space. Make sure to ask for me (Matt) when you arrive if you want to grab one of them! Sign up for the event here: (Or at 3DHubs, that works as well - https://www.3dhubs.com/new-york/events/3dprintingday-new-york-0 )
  6. Here are 15 smaller and smaller LoPolyMonsta apes, in progress. Have been experimenting in Blender to make it easy to run a long processions of shrinking STLs. I need to dial in my temp and flow settings to make for a little less stringing (i keep cheating by opting for 237 C instead of tuning for just the right temp setting). Last week I ran groups of 4 and 10 Ultibots, but this is getting a lot more exciting to print at 15 and beyond! I'm running these on a UM2 with an Olsson Block installed, sticking with 0.4mm nozzle for this contest, not that I am permitted to win it. Do you folks think having a wee Blender script to automate creating "Shrinking spiral" from any STL would be helpful to any of you?
  7. Awesome. In the past, I've seen experiments that start with a blob overextruded on a 3d printed surface followed by rapid z-movements, but these were with toolheads with drive motors on them -- I am super excited to see experiments with bowden-based extruders!
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