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GregValiant

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Posts posted by GregValiant

  1. #1. You win the prize for the longest post.

    #2. Very few cartesian style printers home to the center of the build plate.  For 99.9% of them the home position is the left front corner.  To my knowledge all Creality printers home to the left front corner.  It's where they put the switches.

    #3.  A lot of people like auto-bed leveling.

  2. It only comes up on mine when the printer is off, and the USB disconnected.  Then turn the printer on and plug in the USB and open the port.  After that, opening and closing the port brings up a short version.

    M115 doesn't bring up the version on my machine either.  I'm in a long print and a reboot is a bad thing or I'd send a screen shot.

  3. A word of caution.  When using Pause at Height or Filament change - be careful using G28.  Better to send the print head to X0 Y0.  When you use G28 the print head goes back to the switches and the switches aren't very accurate (meaning they aren't very repeatable).  One homing move might be .5mm different than the next homing move.  That doesn't matter when starting a print, but in the middle of a print it could cause a layer shift.  Remember also that G28 sends the Z to 0 and if there is a print in the way when the head drops there will be a crash.

  4. Here @Mari.  Merry Christmas from another E3Pro user.  There are instructions.  It's a windows program so if you are on Linux it won't help.

    When the program starts and you open the Com Port it will cause an "external reset" of the printer and when the printer comes back up it will let you know the firmware version, buffer size, etc.

     

  5. Have you tried a support blocker?

    Place a support blocker (Mesh Modifier) under the blind holes.  Use Non-uniform scaling and set the height, width, and length.  Move the block so all the holes will be supported and check that the Z is at 0.  With the Mesh Modifier selected:  From "Per Model Settings" select the "Modify Settings for Overlaps" tool.  Use Select Settings and pick Infill Density.  Set it to something that will allow the bottoms of the holes some support.

    All of your model around the Mesh Modifier will have the infill you set in the main settings, and the Mesh Modifier will have the higher density support for the holes.

  6. Alright.  I know that Cura is an intricate and convoluted piece of work and that the Team is smart and dedicated so I guess I understand why it wasn't implemented.

     

    Looking at it as an opportunity for an enterprising old man to come up with a workaround isn't satisfying even though the name for the workaround "Double Slice - Double Splice" is snappy.  If the POS printer could handle all the retractions without clogging up the need wouldn't have arisen.  Maybe I'll work on automating the DSDS.  That won't be simple either.

     

    Thanks for the reply.  My understanding of Cura goes up another infinitesimal step.  On the bright side it means I won't have to think up the wording for a feature request.

  7. In your Cura folder  "...\Plugins\PostProcessingPlugins\Scripts" is PauseAtHeight.py.  Near the end of that file is a line: prepend_gcode += self.putValue(M = 82) + " ; switch back to absolute E values\n

     

    If you were to open the file in Notepad and change it like this

    prepend_gcode += self.putValue(M = 83) + " ; relative E values\n

    I think you would get what you want.

     

    You could also use the Search and Replace plugin to change all M82's in the file to M83's.  

  8. My printer hates all the retractions necessary at the top of tree supports and the roof interface.  Having to pause, pull the filament, and resume is a pain.  I'm good at re-starting after an abort but that doesn't make it less nervous.

    I figured I could add a support block / mesh modifier and turn retractions off for the roof support at least.  Not an option.  It appears that no Travel Settings are available for Mesh Modifiers.  I find that odd.

     

    Why aren't any Travel Settings available for Mesh Modifiers?

  9. This is an interesting read.

    There is also the question of necessary modifications to existing hardware.  It could be as simple as a longer nozzle or as complicated as adding a 4th and 5th axis to rotate the extruder about the X and Y.

    It looks like Slic3R and others have put time into this.  They may run right into the AutoDesk patent.  That could be an expensive show stopper.

  10. Put in a .4 nozzle.  The difference in print time is 6 minutes to 10 minutes.  Definition will be better as well.

     

    Scaled up to 5000% it looks good with the .8 nozzle at .5 layer height and .57 initial layer height.  It comes out to 70.57mm tall as opposed to the theoretical 70.58.  The big nozzle just can't do small details and the lip of the bowl qualifies as a small detail.

    Now, if you were to rework the bowl and square that lip, then you would be good.  Or make the bowl a solid and use spiralize to print it.  It's going to be pretty much a single wall anyway.

  11. When I scale it up - part of the model is below the build plate.  Check the Z and make sure the part is resting on the plate.

     

    The part is 14.118mm tall after scaling.  It sliced to 27 layers @.  0.5mm layer height so it ended up about .6mm short.  Because of the gradual sharpening of the lip and the tight radius on the top the .8 nozzle can't make it.  That nozzle will also leave ridges near the top as Cura struggles with whether to keep it near the inside wall or the outside wall.

     

    In response to @Smithy 's post - going down to .4 line width didn't help.

  12. The Cura team will need more info.

    What computer / processor / operating system, and the graphics card info if you can provide it.

    Which version of Cura.

    In Cura select "Help / Show Configuration Folder" and find the Cura.log file.  Post that Log file here.

    More information is better.

  13. Sorry Victor.  I suffer from short attention span and I moved on.  I will re-create the block and I will post the 3mf file here.

     

    @gr5 is a moderator here and he coined a term that I like...it's the "snot factor" and is used to describe the tendency of a nozzle going around a hole to pull the plastic in towards the center.  It always makes the hole smaller hence the "Horizontal Hole Expansion" setting in Cura.

    With the size of holes you are talking about I'm curious how you will mitigate the "snot factor" to get the plastic to stay where it's put.  You aren't leaving much room for error.

    For small holes (like 2mm) I use a HHE of .15.  Since it acts on the radius I am telling Cura to make the 2mm hole 2.3mm in diameter.  When the print is done I have a 2mm hole.  So for a .03mm hole and an HHE of .15 I would tell Cura to make a .33mm hole.  That is 10X bigger than the starting dimension of .03.

    Without access to a set of pin gauges I have no way to measure the hole when it's done.  When I did have a set of pin gauges they started at 0.2mm so they wouldn't have worked anyway.

    At any rate as part of this edit I've included a 3mf file.  Interesting thing...Cura found the .02 diameter hole but missed the .03 diameter hole.  I think if fell between the cracks in the STL resolution.

    Hole Block.3mf

  14. I've always wondered where the double reset comes from, whether it's a setting thing, or just something in Cura.  I've just started printing a 1.1 million line Gcode file.  Until some time tomorrow I will have enough to fret about without worrying about the extra line of code.

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