Lilltle pauses, little blobs on suface

Tagged: , , , ,

Viewing 11 posts - 1 through 11 (of 11 total)
  • Author
    Posts
  • #7821
    Andreu
    Participant

    Hy everyone,

    I’m a happy user of a Sigma for less than a week. It runs incredible, printing from SD on the first tests of surface finish (impressive on 0,05mm), and on bridges achieving a 20cm long bridge!… Had problems with stringing, but I prefered testing a long print before tweaking anything. Then after some hours of printing the extruder started to do micro stops while printing resulting in little bubbles on the surface, ending in a 12h regular print that otherwise would be a perfect one ( https://dl.dropboxusercontent.com/u/179381/IMG/DSC_0441.JPG ). Then tried a little test to see if it was due to the long print, but now it seems that it is doing blobs all the time, as this image shows clearly: ( https://dl.dropboxusercontent.com/u/179381/IMG/DSC_0444.JPG ).

    Maybe it is the buffer stressed on complicated perimeters? Now I’m printing a simple cube and is going perfectly well… So definitively the problem is on those little pauses (less than a second, but sufficient to render a blob), not on layer changes. Don’t know how to fix this. I have fear that some heat damaged the electronics.

    Any ideas? Thank you!

    #7964
    mcobler
    Participant

    Hi Andreu,
    You are right in the spot. We’ve notice this issue too. It seems to be problem of the LCD display update process…
    We’ve fixed this issue in next firmware version.
    You can get more info here:
    http://www.bcn3d.com/es/forums/topic/new-release-candidate-firmware-version-1-1-6rc/

    #7966
    Andreu
    Participant

    Thanks! But now my headache is to conect the printer via USB. Tried to follow these instructions:
    https://github.com/BCN3D/BCN3D-Cura-Windows/wiki/Installing-Virtual-COM-Ports-in-Windows
    But my version of Windows7 don’t recognize the drivers firm and don’t want to use them (they are installed but not working). Tried to do it manually, and with other FT232R USB UART drivers, but every time does the same. Now I’m stuck unable to conect to the printer and thinking on formatting and installing a new SO…
    Any help would be apreciated.

    #8122
    Andreu
    Participant

    Well, managed to update the firmware and LCD. But it does’nt fixed it. Every time LCD info flickers the hotend pauses.

    #8139
    mcobler
    Participant

    Hi Andreu,
    The LCD flickering is not an issue. As you can read in the point #2 of the releases page
    https://github.com/BCN3D/BCN3DSigma-Firmware/releases
    It’s a thermal protection in case of a thermistor malfunction or Hotend / Heated Bed error.

    #8154
    Andreu
    Participant

    Yes it’s an issue if it makes blobs. #2 says that after activating the hotend protection the machine has to be turned off. It’s not the case, it only makes litle pauses wich renders blobs. So if it is a hardware malfunction how I can fix it? Those blobs are the only step to a perfect print. That’s why they are so annoying…

    #8180
    roger uceda
    Moderator

    Hi Andreu,
    Have you updated the firmware to the 1.1.6? I had the same issue with high detailed files and now works perfectly.
    The problem was in the refresh rate of the screen, now the screen only refreshes the temperature of the extruders, heated bed and file name if it changes.
    If you have already updated the firmware, maybe you might try reducing the poly count a bit, and see if that gets you there. You may be operating near the transmission limits if the object resolution is too high (lots of short line segments, packed tight).
    I believe Netfabb can do this 😉
    Roger

    #8188
    Andreu
    Participant

    Hy Roger,
    I’ve installed this weekend the v1.1.5 which seems to be the last on github today: https://github.com/BCN3D/BCN3DSigma-Firmware/releases
    Am I wrong?
    But anyway I will try to reduce the poly density of those models and report back.
    Thank you!

    #8274
    roger uceda
    Moderator

    Hi!
    We have released a new one:
    https://github.com/BCN3D/BCN3DSigma-Firmware/releases/tag/01-1.1.6
    Please update it and tell us how it works.

    #8540
    Andreu
    Participant

    Hy again. I’ve tried things this weekend. First printed with less polucount and other material than the colorfila provided in the sigma’s box. And the result is this: https://dl.dropboxusercontent.com/u/179381/IMG_20160616_001538.jpg
    Impressive printing of this difficult model. No strings, no blobs. Nearly perfect. I think that colorfila it’s not the best one on the sigma, it seems too fluid: those blobs not appear on the new PLA, even on those micropauses. Talking about micropauses, I coludn’t see much of them on this reduced polycount, yet it is a complicated model. I’m very satisfied now.
    Then tried the 1.6.6 version. I did something wrong because when I hit print button it starts to print but without heating things up. Weird. Filament started to grind and I cancelled the print. Tried different gcodes and all do the same. I returned to 1.1.5 and it works again. Well, I will stay on 1.1.5 ;P
    Thanks for the support, guys.

    #8648
    mcobler
    Participant

    Hi Andreu,
    Glad to hear that. Could you explain a little bit more the new PLA filament you’ve been trying?
    It’s strange that issue when you hit the print button. Please if you could update to 1.1.6, replicate the error and document it on github issues would be great.
    Happy printing!

Viewing 11 posts - 1 through 11 (of 11 total)
  • You must be logged in to reply to this topic.