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  1. What printer/hot end do you have? 25mm/sec at 1mm width and 0.8mm height seems really fast to me. You're extruding a ton of material at that speed. Unless you have a really powerful hot end I could see the sheer volume of material dropping the nozzle temperature. When the nozzle changes velocity, the extruded material isn't hot enough and gets pulled/separated from the lower level which gives you your rounded corners. I would set your print speed to something really low, like 5-10mm/sec and try again. If it looks better, your hotend probably just doesn't have enough thermal in
  2. I'm not sure if this is @iMattmax's problem or not, but I'm coming from Cura 3.6 and I installed 4.0.0 last night and I thought the Marketplace was missing too. I spent legitimately 10 minutes clicking every menu option I could see, closing and re-opening Cura, and trying everything I could think of to find it. It turns out that in the new UI, there's a new button at the top-right of the screen that says 'Marketplace,' and that's the only way to open the Marketplace menu.
  3. If you only print via SD then you probably don't have a graph of temperature data. Octoprint is super useful for stuff like that but if you don't have a raspberry pi then I guess you're out of luck. 20* drop when the fan comes on is way way way too much. Either your PIDs are incredibly fragile and even a tiny increase in airflow messes them up, or your fan duct is very wrong. Once you get a new duct on there I think your problem will just disappear. Some people recommend doing PID tuning at 50% fan, that way your PIDs are a little more aggressive than needs be with n
  4. Can you post a picture of your temperature graph when the thermal runaway happens? I want to see if it looks like your heater is eventually going to get your nozzle to the right temp and your thermal runaway protection is just too aggressive, or if it looks like your fan is just overpowering your heater. Definitely check the airflow and the design of your duct, the air shouldn't be hitting/cooling the nozzle at all, it should only be hitting the freshly extruded material. In reality the turbulence from the duct will cause the nozzle to lose some heat, but it should be minimal. I
  5. This sounds a bit like an X-Y problem. First off, your cooling fan should be angled in a way that it doesn't cool the nozzle very much. The cool air should hit right below the nozzle (so the brunt of the cooling effect hits the extruded filament). I would check to make sure it's angled properly. Also, if you're running marlin, I think it would make more sense to change your thermal runaway parameters. Really it would be as simple as updating the following settings in Configuration_adv.h: If you're getting this issue after you hit your print temperature but before yo
  6. Are you running Cura inside of a VM? I got this error when I was running Cura on a Windows guest in VirtualBox. I found a StackOverflow post that explained how to enable rudimentary OpenGL support, it worked for me, maybe this will help: StackOverflow OpenGL Fix
  7. I just installed Cura 3.4.1 and 3.5.1 on a fresh Windows 10 virtual machine... and you're right! The settings changes in the 3.5.1 version did NOT go back and modify the changes in 3.4.1. I'm not sure what my earlier problem was, but it's not a problem anymore. Thanks! Now I can run 3.5.1 and test it without worrying about losing my 3.4.1 settings.
  8. I'm not sure how feasible this is, but what would help me a lot is to have the ability to run different versions of the Cura applications completely in parallel with each other, sharing no files or profile settings at all. Like a lot of people, I've spent dozens of hours fine-tuning my 3.4.1 profile, dialing in well over 100 options and reconfiguring them for multiple nozzle sizes and materials. I tested the 3.5 beta (the beta versions seem to have their own paths for profiles and printers so I didn't have to worry about my production settings), but I refrained from updating to the 3.5 relea
  9. In case anyone finds this thread, smartavionic's PR was implemented in Cura 3.5 beta on 9/18/2018.
  10. @smartavionics got it, thanks for going over that. I'll probably keep printing with interior walls first for now, but if things get bad I'll switch it back. Once more, thank you so much for adding this feature!
  11. @smartavionics I just tested it out. It's perfect! It's exactly what I wanted, I was able to print a 3-wall thick print without any tiny-flow segments. It sped up the print, saved me material and the quality was exactly what I wanted. I have one question: on the tooltip for Minimum Flow, it says that "...you must print the outer wall before the inner walls." When I read that I was sad because I print inner walls first so the outer walls look nicer. Just to see what would happen, I unchecked "Outer walls before inner walls" and the model sliced exactly how I wanted it to. The
  12. Oh man, it looks like this is release with CuraEngine PR 721 (wall_min_flow) in it! I am so excited, this was the last big issue I had with Cura. Thanks again to @smartavionics for creating the feature, and thanks to the Cura team for all your awesome work!
  13. Cura has had an adaptive layer heights feature since I think 3.2.1. It's called Adaptive Layer Height, and you can also set the 'Infill Layer Thickness' to change the thickness of the interior infill line. I don't think you can setup variable line thickness manually within a given layer, but you can enable 'Fill Gaps Between Walls' to sort of do this automatically, but I've never had much luck with this setting so I leave it off.
  14. That is extremely helpful, thank you! I found your PR on GitHub, it looks like it's exactly what I want. Fingers crossed that it gets implemented soon
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