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brianmichalk

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Posts posted by brianmichalk

  1. I have a single hotend, dual extruder Artemis using Cura 4.8.0.  I also have other printers and am trying to get the tool change macros on each printer correct so that one Gcode file works for any printer.

     

    The problem is that Cura is prepending a T0 tool selection to my gcode file, and this is causing problems with getting filaments loaded correctly based on the temperature of the hot end.  Here is the GCode, and the portion above "BKM START G-CODE" is what is prepended by Cura.  How can I disable this?

     

    ;FLAVOR:RepRap
    ;TIME:2228
    ;Filament used: 5.60737m, 0m
    ;Layer height: 0.2
    ;MINX:-28.37
    ;MINY:-42.584
    ;MINZ:0.3
    ;MAXX:28.37
    ;MAXY:47.872
    ;MAXZ:23.1
    ;Generated with Cura_SteamEngine 4.8.0
    T0
    M190 S60
    M104 S205
    M109 S205
    M82 ;absolute extrusion mode
    ;BKM START G-CODE
    M203 Z14000	; max feedrate
    G28 		; Home

     

    This is identical to this topic:

     

     

  2. I am having the exact same problem.  It is a problem because T0 is selected.  For a Duet board, the extruder will not move filament unless the hot end is above 100C(I think).  Here is what happens:

     

    Machine cold:

    T0 is selected, triggering the tool change macro that advances the filament 100mm past the Y adapter.

    filament advance command aborts because temperature too low.

    Filament is now 100mm before hot end, and brim of print is not completely printed.

     

    Machine hot:

    T0 is selected, triggering the tool change macro that advances the filament 100mm past the Y adapter.

    filament advance command is successful because hot end is above 100C because of previous print.

    Filament is correctly positioned and brim prints correctly.

  3. I upgraded the Duet Wifi plugin, and now Cura segfaults quite often after sending the job to the printer.  Sometimes the printer gets everything and proceeds to print, sometimes not.  I can usually get one print job out without crashing, but the second job seems to reliably crash.  I'm pretty sure it's a problem with the plugin.

  4. I print a large flange on top of support, and it's never really come out as good as I would like.  I know there is a top/bottom speed setting, but I would really like to change the speed above support.  Enabling bridge mode doesn't get triggered here, but that would be my preference, because there are a lot of parameters I can change to suit my need there.

    I think the layer above support is called a "bottom layer".  If I set that speed as low as I want, then the first layer speed really does take a long time.

    image.thumb.png.733ca855d7d04090a4792002ed99f99a.png

  5. SandervG suggested I post about the issue I'm having.

     

    I am trying to increase my printing capacity, and to do that, I need to print multiple masks per session to keep the printer working for a long time without user intervention.

    I have printed an array of masks, but I can only fit two on the build plate when they are at the same Z-height.  So, I had the idea of modifying the CAD design so the masks are nestable.  This works great.  I should be able to print about 20 at a time.

     

    The problem however, is that I'm trying to basically print on top of support, where the lower mask is supporting the upper mask.  I am entering the Z-offsets manually, and not all of my Z-gaps are the same.

     

    Other than a new feature, does anyone else have any ideas?  My approach for now is to get the original thickness from the CAD file, and use that, plus the gap thickness, and enter that manually.  This only works for me.  I hope that if others print this nested mask that they can do so with minimal effort.  I use a .7mm nozzle, so my Z-gap is different than someone that uses a .4mm nozzle.

     

    The print I tried last night, the 3rd mask broke off of the second mask, and higher masks did not get printed.  The first and second masks were rigidly attached when I found them this morning, so this is not a plate adhesion problem.

     

    Any help is appreciated.

  6. I am printing masks for the local hospital.  I modified the Montana mask (www.github.com/brianmichalk1/MontanaMask) to make it nestable.  I multiply them and arrange them vertically, leaving one layer width between masks.

     

    The problem is not all of the break lines are uniform.  Some are better bonded, and some result in failed prints.  Is there a way to fast track this?

     

    1) Select multiply.  Have a checkbox for "multiply vertical".

    2) assuming the part was previously placed for printing, just offset the mask using the same X, Y, but Z is reduced until there is a collision with the mask below.

    3) Increase the vertical gap to be the same as the specification for support gap.

     

    Only one point touching the build plate needs to be tested assuming it's a plane.  

  7. This is an awesome idea.  Just asked the hospital.  If I can get the scans, how hard is it to make the new design?  In Solidworks I can replace parts.  Can this be done in Autodesk?  Replace one STL with another?

    I'm navigating the Fusion download now.  Trying to find the system requirements.  Can I run it in a VM?

  8. I filled out the form on behalf of the doctor who sent me this request, so it's a little off in places, because I am not a medical professional.

     

    I need to enlist the help of someone with a late copy of Autodesk to make some minor modifications to the design.  Where is the best place to ask this?

  9. I was just asked if I could print 100 masks of this design: https://longliveyoursmile.com/3d-printable-mask-for-covid-19/

    It will be faster if I can batch this up, printing about ten at a time, nested vertically.  I tried multiplying in Cura, and setting the x/y/z manually, but the software keeps snapping the mask back onto the plate.

     

    Is there a way I can stack them vertically, and have support printed?  I'm just now getting into this, having downloaded the CAD files.  I'll see if there's anything I can do with the CAD to make this work.

  10. I just got asked if I could print 100 masks.  It's the Montana Mask that the doctor would like.  It's going to take me 1 hour, 22 minutes for each mask, but I'm sure I could speed that up if I printed them nested, and stacked vertically.  I'm going to start a separate thread.

     

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