Skirt / non skirt

I am printing an object (a lot) that leaves me ZERO room for a skirt. I can prime by hand, but this is less desirable to me.

However, I do have room on the bed to print a small, say 20mmx20mm square or circle in a single layer to get the nozzle primed. Is there any way in Slic3r to direct such a thing? I have tried adding a single layer circle to the print, but I can't figure out how force Slic3r to choose to print that first!

Thank you,
-Matt

I use custom gcode that simply goes to a specified coordinate at the first layer height and extrudes a blob that primes the extruder and grabs the crud off the nozzle.

This is in the printer profile under custom gcode in the "start Gcode" box

G28 ; home all axes
G1 Z2 F5000 ; lift nozzle
G1 X0 Y-148 Z[first_layer_height] F6000
G1 E10 F300 ; extrude a blob on the front edge of the bed to clean the nozzle

Edited 2 time(s). Last edit at 04/29/2020 08:33AM by the_digital_dentist.

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Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]

Brilliant. Thank you!
-Matt

When you remove the print from the bed, don't forget to remove that blob, too, otherwise the extruder will bang into it when the next print starts. I put the blob at the front edge of the bed so I'll see it.

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Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]