Bug on 1.0.0RC3, Z moves up before first layer.
Posted by CaptainObvious
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Re: Bug on 1.0.0RC3, Z moves up before first layer. March 12, 2014 09:30AM |
tmorris9, thanks for the effort. 
Here's an example of an object that displays that problem, as you can see it only has two perimeters width at the base, I double checked the mesh and it is absolutely flat at the bottom, so that shouldn't be the issue.
The start of the G-code where again the bug shows up near the bottom:
In the end I sliced the part with Cura and it came out with no problems; but I prefer Slic3r, in my experience while Cura is much faster (in slicing and printing) creates objects with less surface quality than Slic3r.
Here's an example of an object that displays that problem, as you can see it only has two perimeters width at the base, I double checked the mesh and it is absolutely flat at the bottom, so that shouldn't be the issue.
The start of the G-code where again the bug shows up near the bottom:
; generated by Slic3r 1.0.0RC3 on 2014-03-12 at 20:05:44
; layer_height = 0.25
; perimeters = 2
; top_solid_layers = 2
; bottom_solid_layers = 2
; fill_density = 0.4
; perimeter_speed = 40
; infill_speed = 50
; travel_speed = 130
; nozzle_diameter = 0.4
; filament_diameter = 1.8
; extrusion_multiplier = 1
; perimeters extrusion width = 0.25mm
; infill extrusion width = 0.25mm
; solid infill extrusion width = 0.28mm
; top infill extrusion width = 0.28mm
; first layer extrusion width = 0.48mm
G21 ; set units to millimeters
M107
M104 S210 ; set temperature
G28 ; home all axes
G1 Z5 F5000 ; lift nozzle
M109 S210 ; wait for temperature to be reached
G90 ; use absolute coordinates
G92 E0
M82 ; use absolute distances for extrusion
G1 F1800.000 E-1.00000
G92 E0
G1 Z0.300 F7800.000
M106 S248
M104 S190 ; set temperature
G1 Z0.550 F7800.000
G1 X89.326 Y106.432 F7800.000
G1 E1.00000 F1800.000
G1 X89.676 Y106.432 E1.00970 F1680
In the end I sliced the part with Cura and it came out with no problems; but I prefer Slic3r, in my experience while Cura is much faster (in slicing and printing) creates objects with less surface quality than Slic3r.
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Re: Bug on 1.0.0RC3, Z moves up before first layer. March 12, 2014 11:01PM |
Quote
tmorris9
I can slice that file without the issue you have,
I thought of something, in Slic3r check Printer setting / Z offset and make sure it's 0
This setting will change where Z starts.
Well, that is odd.
Yes, the Z offset is at zero, in any case that would also offset the skirt and brim (which print at the correct height), not the first layer of the actual object.
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Re: Bug on 1.0.0RC3, Z moves up before first layer. April 01, 2014 11:12AM |
I was testing Slic3r 1.1.0 and I see the problem persists, here's a screen capture of the first two layers in Pronterface showing the issue.
On the left the first layer and you can see how the perimeters stop at the top when the surface against the print bed is only two perimeters wide. On the right you can see the second layer and here the perimeters are fully traced, but of course since the first layer is incomplete the thin edge on the second layer is printed in the air.
On the left the first layer and you can see how the perimeters stop at the top when the surface against the print bed is only two perimeters wide. On the right you can see the second layer and here the perimeters are fully traced, but of course since the first layer is incomplete the thin edge on the second layer is printed in the air.
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