Prusa XL Start G-code Anti-oozing
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Prusa XL PrusaSlicer Start G-code to prevent bed oozing
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This Start G-code is for PrusaSlicer v2.8.0, further version needs to be inspected and ultimately modified if necessary.
Problem:
I was a little upset after a 10+ hours print to see a white line on the "visible" surfaces of the final product. I know I just had to check at the beginning of the print, when the nozzle is leaving the dock, after it is heated to print temperature and going over the bed directly to the front purge tabs. This left the white string.
Solution:
What a great opportunity to improve (IMHO) the XL purge sequence, with little modifications, using PrusaSlicer placeholders in the custom G-code. My new Start G-code simply goes around the printed part on the X-axis (using first_layer_print_min[0] and first_layer_print_max[0]). You can also replace first_layer_print_min/max with print_bed_min/max, going all around the bed sheet instead. The X-axis actually goes -8, but I didn't find the placeholder that return this value.
Just replace the Start G-code text located in Printers / Custom G-Code / Start G-Code with the one from the text file (to be used with PrusaSlicer 2.8.0).