Slic3r not printing in center

I'm am trying to print a simple test cube on my. Kossel but the head moves in front of the Z tower and bottoms out my X carriage. I have confirmed that x and y are in the center 0,0 after G28 but for some reason the head does not start in the center. What is going on? I am using slic3r and Pronterface

By default slic3r assumes a square print bed with (0,0) at one corner. Go into the slic3r printer settings and tell it you have a round bed with (0,0) at the centre. Then re-slice.

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Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].

Thanks dc42. I have slic3r set to a circular print bed. I should have mentioned this in my first post. This is really wierd!

This is my first 3d printer but I have done the calibrations and manually leveled the head

Edited 1 time(s). Last edit at 07/26/2015 08:54AM by MarkIngle.

Can you post the first 100 lines or so of the gcode file, so we can see whether the problem is with the slicing or the printer?

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Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].

I'll do that when I get home. Just for grins I exported the stl to gcode and loaded in pronterface. The head printed in the middle so it must be the slicing? I found the extruder needs calibrating too . One step at a time!

Here are the first couple of lines of the Gcode

; generated by Slic3r 1.2.9 on 2015-07-26 at 00:08:20

; external perimeters extrusion width = 0.40mm
; perimeters extrusion width = 0.48mm
; infill extrusion width = 0.48mm
; solid infill extrusion width = 0.48mm
; top infill extrusion width = 0.48mm

M107
M190 S65 ; set bed temperature
M104 S185 ; set temperature
G28 ; home all axes
G1 Z5 F5000 ; lift nozzle

M109 S185 ; wait for temperature to be reached
G21 ; set units to millimeters
G90 ; use absolute coordinates
M82 ; use absolute distances for extrusion
G92 E0
G1 Z0.400 F7800.000
G1 E-1.00000 F2400.00000
G92 E0
G1 X16.714 Y0.000 F7800.000
G1 E1.00000 F2400.00000
G1 X16.714 Y10.000 E2.18765 F1800.000
G1 X16.317 Y12.275 E2.46188
G1 X15.173 Y14.280 E2.73610
G1 X13.417 Y15.780 E3.01033
G1 X11.257 Y16.595 E3.28455
G1 X10.000 Y16.714 E3.43452
G1 X-10.000 Y16.714 E5.80982
G1 X-12.275 Y16.317 E6.08405
G1 X-14.280 Y15.173 E6.35827
G1 X-15.780 Y13.417 E6.63250
G1 X-16.595 Y11.257 E6.90672
G1 X-16.714 Y10.000 E7.05669
G1 X-16.714 Y-10.000 E9.43199
G1 X-16.317 Y-12.275 E9.70622
G1 X-15.173 Y-14.280 E9.98044
G1 X-13.417 Y-15.780 E10.25466
G1 X-11.257 Y-16.595 E10.52889
G1 X-10.000 Y-16.714 E10.67886
G1 X10.000 Y-16.714 E13.05416
G1 X12.275 Y-16.317 E13.32838
G1 X14.280 Y-15.173 E13.60261 F1800.000
G1 X15.780 Y-13.417 E13.87683
G1 X16.595 Y-11.257 E14.15106
G1 X16.714 Y-10.000 E14.30103
G1 X16.714 Y-0.060 E15.48155
G1 E14.48155 F2400.00000
G92 E0
G1 X8.172 Y-8.172 F7800.000
G1 E1.00000 F2400.00000
G1 X8.172 Y8.172 E2.94102 F1800.000
G1 X-8.172 Y8.172 E4.88205

Edited 1 time(s). Last edit at 07/26/2015 01:20PM by MarkIngle.