G92 X132.4 Y20.

I also had to print parts with skirts to prime the print head so I added a priming routine to the startup GCode. The following will print a heavy bead around the perimeter of the bed. You can comment out the lines with ";" if you do not need all four lines.

;prime nozzle with 1-4 lines

;this extrudes a box around the perimeter of the print area

;Add or remove ";" from lines below to add/remove priming lines

M107

G1 F3000 E-.50000

G0 F4500 X0 Y0 Z0.300

G1 F900 X151 Y0 E23

G1 F900 X151 Y151 E46

G1 F900 X0 Y151 E69

G1 F900 X0 Y0.500 E92

G92 E0

So the full Startup GCode is :

- Code: Select all
`G28 X0 Y0 Z0 ;home`

G92 E0 ;set extruder to 0

G29 ;measure bed level with prox

G92 X132.4 Y20 ;correct the bed origin. The G29 changes the bed 0,0 point so this corrects it.

;prime nozzle with 1-4 lines

;this extrudes a box around the perimeter of the print area

;Add or remove ";" from lines below to add/remove priming lines

M107 ; fan off

G1 F3000 E-.50000 ;backup extruder slightly

G0 F4500 X0 Y0 Z0.300 ;go to bed origin

G1 F900 X151 Y0 E23 ;draw front edge extrude a 151mm line

G1 F900 X151 Y151 E46 ;draw right edge

G1 F900 X0 Y151 E69 ;draw back edge

G1 F900 X0 Y0.500 E92 ;draw left edge close box

G92 E0 ;reset extrusion length to 0

I hope this helps anyone else that has had the same problems.