Printing result problem

Hi,

My print result is having imperfection at the edge at upper right corner (top view).

Anyone have idea what causing this? I have attached picture and gcode at below.

Thanks
tat88

; generated by Slic3r 1.0.1 on 2014-05-24 at 19:41:56

; layer_height = 0.24
; perimeters = 2
; top_solid_layers = 4
; bottom_solid_layers = 3
; fill_density = 0.4
; perimeter_speed = 40
; infill_speed = 40
; travel_speed = 60
; nozzle_diameter = 0.5
; filament_diameter = 1.75
; extrusion_multiplier = 1.0
; perimeters extrusion width = 0.50mm
; infill extrusion width = 0.87mm
; solid infill extrusion width = 0.85mm
; top infill extrusion width = 0.85mm
; first layer extrusion width = 0.48mm

G21 ; set units to millimeters
M107
G21 ; set units to millimeters
M203 X6000 Y6000 Z500 E3000 ; Allow 100mm/s speeds
G90 ; use absolute coordinates
M83 ; use relative distances for extrusion
G1 Z5 F200 ; lift nozzle
G1 X2 Y50 F2000; Go to wait for warm position
M140 S68 ; Set bed heater
M116 ; Wait for everything (Bed temp)
T0; Select extruder
M104 S175
M116; Wait for extruder temp as well
G90 ; use absolute coordinates
M83 ; use relative distances for extrusion

I have a few suggestions:

* Check that you have retraction set to at least 4mm

* Try un-checking "external perimeters first". I find this gives better results.

* Your extruder temperature looks rather low to me, although the optimum depends on your filament. I use 195C first layer and 185C for the rest.

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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].

Hi Tat, I have a great respect for DCs suggestions, but I suspect it might be a bed leveling problem myself.
Looking at your pictures, the layers at the GOOD end of the print look a little tighter togeather than the Bad end.
Take a careful look at the print, or measure a number of layers at both ends to see if it's level.
Then lookat the other options as well.
Kim..

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Please send me a PM if you have suggestions, or problems with Big Blue 360.
I won't see comments in threads, as I move around to much.
Working Link to Big Blue 360 Complete

Hi DC, Kim,

Thanks for all the suggestions. I have check the filament feed, it feed slightly shorter than it should be. Therefore I made some extruder calibration again.

I have print a 2x2x2cm cube, it looks ok. Will observe from time to time.

Thanks
tat88