My delta printer produces 3d objects with a slight milsalignment along X axis. In order to correct it, I have developed a script for post-processing g-code files.
The script processes g-code files loaded into Repetier and compensate for layers shift, both in X and Y directions.
Recently I ave added a scaling feature, in order to grow/shrink 3d objects in X and Y directions.
The script is named "rolagoproc.pl" . For usage in Repetier Host, you have to declare its pathname in menu Printer Settings -> Advanced as in the following example:
"perl C:\Users\alfa\Desktop\3dpostproc\rolagoproc.pl #out
In this way, the script is executed after each slicing action and operates a filtering on the g-code produced by the slicer (slic3r).
The parameters to be modified into rolagoproc.pl are grouped into two categories:
1) Layers shifting (typical case of slanted 3d objects)
2) Scaling vs X or Y directions
As an example, see the following settings, that fit all right for my 3d-delta printer:
FOR LAYER SHIFTING COMPENSATION:
my $CRX = -0.002; # $CRX growing and negative, makes left shifting
my $CRY = 0.00; # $CRY growing and negative, makes forward shifting
FOR SCALING OBJECT X-Y DIMENSIONS:
my $XSCALE = 1.006; # x scaling factor
my $YSCALE = 0.986; # y scaling factor
The script is available for free download here:
[
github.com]
Have a nice day
Agostino
