hansen644 wrote:Here is slicer Gcode
G1 Z5.1 F5000 ; lift nozzle
here is some gcode that I am printing now.
this is the top few lines
; generated by Slic3r 1.1.7 on 2015-01-28 at 21:46:19
; perimeters extrusion width = 0.40mm
; infill extrusion width = 0.67mm
; solid infill extrusion width = 0.67mm
; top infill extrusion width = 0.67mm
; support material extrusion width = 0.40mm
G21 ; set units to millimeters
M107
M190 S90 ; wait for bed temperature to be reached
M104 S210 ; set temperature
G1 Z5.1 F5000 ; lift nozzle
M109 S210 ; wait for temperature to be reached
G90 ; use absolute coordinates
G92 E0
M82 ; use absolute distances for extrusion
G1 F900.000 E-1.50000
G92 E0
G1 Z0.300 F2400.000
G1 X90.022 Y91.544 F2400.000
G1 E1.50000 F900.000
G1 X92.200 Y90.829 E1.64495 F480.000
G1 X107.800 Y90.829 E2.63131
G1 X109.456 Y91.223 E2.73893
G1 X110.756 Y92.322 E2.84655 F480.000
G1 X111.471 Y94.500 E2.99150
G1 X111.471 Y105.500 E3.68701
G1 X111.077 Y107.156 E3.79463
G1 X109.978 Y108.456 E3.90225
G1 X107.800 Y109.171 E4.04720
G1 X92.200 Y109.171 E5.03357
G1 X90.544 Y108.777 E5.14119
G1 X89.244 Y107.678 E5.24880
G1 X88.529 Y105.500 E5.39375
I have highlighted and explained the relevant lines in your gcode. They are performed in sequence down the line as the machine reads them. To do what you want you just need to change the order of two lines. The issue is that this is not something that can be changed with a modification to start setting in slicer, but needs to be edited manually each time if you want it to behave this way. There may be a setting deep in slicer somewhere in it's ini you could edit but your wanting the printer to perform in the opposite of the standard. What they want to normally happen is for the head and bed to meet as the bed is moving up. This aids in the initial bead of filament sticking. Your wanting it to do the opposite as I under stand and that will cause adhesion problems possibly.
G1 Z5.1 F5000 ; lift nozzle
here is some gcode that I am printing now.
this is the top few lines
; generated by Slic3r 1.1.7 on 2015-01-28 at 21:46:19
; perimeters extrusion width = 0.40mm
; infill extrusion width = 0.67mm
; solid infill extrusion width = 0.67mm
; top infill extrusion width = 0.67mm
; support material extrusion width = 0.40mm
G21 ; set units to millimeters
*M107 <--------Turns your Fan OFF
*M190 S90 ; wait for bed temperature to be reached <---Sets and waits for bed to reach 90.
*M104 S210 ; set temperature <--Sets Extruder to 210. Does not wait but goes to next step.
*G1 Z5.1 F5000 ; lift nozzle <---Moves bed down 5.1mm at 5000mm/m Also injected by Slicer Start Gcode setting.
*M109 S210 ; wait for temperature to be reached <---Stes Extruder to 210 waits for temp to be reached before next step..
G90 ; use absolute coordinates
*G92 E0 <---This resets your extruder feed to 0 or off
M82 ; use absolute distances for extrusion
*G1 F900.000 E-1.50000 <--- Retracts filament inside extruder 1.5mm at 900mm/m
*G92 E0 <--- This reset your extruder feed to 0 or off again,
*G1 Z0.300 F2400.000 <-- This moves your bed to your .3 offset at 2400mm/m
*G1 X90.022 Y91.544 F2400.000 <--This move your head to the print start position of X = 90.022 and Y = 91.544 at 2400mm/m
*G1 E1.50000 F900.000 <-- This compensates for that earlier retract. You see it is the same value but positive now.
*G1 X92.200 Y90.829 E1.64495 F480.000 <--Where filament starts laying down at 480mm/m for 1.64495mm.
G1 X107.800 Y90.829 E2.63131
G1 X109.456 Y91.223 E2.73893
G1 X110.756 Y92.322 E2.84655 F480.000
G1 X111.471 Y94.500 E2.99150
G1 X111.471 Y105.500 E3.68701
G1 X111.077 Y107.156 E3.79463
G1 X109.978 Y108.456 E3.90225
G1 X107.800 Y109.171 E4.04720
G1 X92.200 Y109.171 E5.03357
G1 X90.544 Y108.777 E5.14119
G1 X89.244 Y107.678 E5.24880
G1 X88.529 Y105.500 E5.39375
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