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force printing of long straight lines


Peterdijkstra
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Posted · force printing of long straight lines

I need to print this

 

image.thumb.png.f173e27e26665ada6a8abad114df1037.png

 

Squares of 2.6 mm separated by lines of 0.4 mm wide (whole thing is about 10x10 cm). Long straight lines would be the best for the grid part of the design. Cura however produces this:

image.thumb.png.31ed46436a71aa60552dadba67d8d593.png

Some random walk with lost of twist and turns in the grid part, this will make the grid less sharp and probably hinder bed adhesion. Any idea on how I can force cura to print this the grid part in straight long lines?

 

I think the best thing at this point is grab the gcode and manually rewrite the grid part

 

 

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    Posted · force printing of long straight lines
    5 hours ago, Peterdijkstra said:

     

    I think the best thing at this point is grab the gcode and manually rewrite the grid part

     

    Yes!  You should use the G92 command very heavily.  G92 resets any axis (in this case extruder or E) to any value where you say, "I know you think you have extruded 1.5mm of filament so far this print and you think you are at E position 1.5 but you are wrong - you are actually at this new position.  Right now.".

     

    So once you calculate the needed filament for one line, use G92 for two purposes - at the start of each line do G92 E0 and then you can put the extrusion amount in the line so all the extruding gcodes will have the same E value.  Simple.

     

    Also after you finish the grid - set the E value to where the printer expected in the original gcode.  So if the deleted code ended at position E73.1247 then you can do an G92 E73.1247 at the end of your grid code so the printer extrudes the correct amount going forwards.

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