Simplify3D retraction before first layer

mersadk

Simplify3D retraction before first layer
July 28, 2017 05:31AM

Registered: 8 years ago
Posts: 17

I've noticed then Simplify3D will do retraction before first layer. This happens even if I disable retraction.
Is there a way to disable this?

This is a part of GCode that it generated.

G28 ; Home all axes
; Starting script end
G92 E0
G1 E-2.5000 F1800
G1 Z0.180 F1000
; layer 1, Z = 0.18

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DjDemonD

Re: Simplify3D retraction before first layer
July 28, 2017 05:57PM

Registered: 8 years ago
Posts: 3,525

Don't know if you disable it in s3d but you can comment out that line in the gcode.

Simon Khoury

Co-founder of [www.precisionpiezo.co.uk] Accurate, repeatable, versatile Z-Probes
Published:Inventions

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mersadk

Re: Simplify3D retraction before first layer
July 29, 2017 09:13AM

Registered: 8 years ago
Posts: 17

Quote
DjDemonD
Don't know if you disable it in s3d but you can comment out that line in the gcode.

I can but it is unnecessary post-processing step.

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Floyd

Re: Simplify3D retraction before first layer
July 29, 2017 09:41AM

Registered: 10 years ago
Posts: 770

You should be able to edit the start gcode like every other slicer out there.

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mersadk

Re: Simplify3D retraction before first layer
July 29, 2017 11:40AM

Registered: 8 years ago
Posts: 17

Quote
Floyd
You should be able to edit the start gcode like every other slicer out there.

I'm able to edit start code, but as you can see in gcode posted above, it is not part of start code.

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DjDemonD

Re: Simplify3D retraction before first layer
July 29, 2017 07:02PM

Registered: 8 years ago
Posts: 3,525

Slic3r does it too

M107
G4 P2000                                                        ;pause for paneldue
G28                                                                 ;home
M190 S80        ;heat bed
M109 S130  ; set extruder temp
G32                                     ;autocalibration - set grid on/off in bed.g
M109 S223  ; set extruder temp
M564 S0                                      ;disable movement limits
G1 X40 Y-168 F3000     ;move to front
G1 E20 F100               ;extrude 20mm slowly
G4 P1500            ;pause
G1 Z1  F3000                ; lower to clip off filament excess
M564 S1                 ;restore movement limits
M220 S100                                                     ;optional speed control default 100
; Filament gcode

G21 ; set units to millimeters
G90 ; use absolute coordinates
M83 ; use relative distances for extrusion
G1 E-1.00000 F3000.00000
G1 Z0.500 F7200.000
G1 X-24.339 Y20.264 F7200.000
G1 Z0.300 F7200.000
G1 E1.00000 F3000.00000
G1 F1200

The first few commands are my start gcode, then after setting the units, G1 E-1 then the move to the first printing coordinate and then the unretract.
Does the S3D gcode also have an unretract, if so its not really a problem is it?

Simon Khoury

Co-founder of [www.precisionpiezo.co.uk] Accurate, repeatable, versatile Z-Probes
Published:Inventions

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M_Xeno

Re: Simplify3D retraction before first layer
July 30, 2017 01:58AM

Registered: 10 years ago
Posts: 150

Try to put a
T0
line in front of your Gcode...

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Floyd

Re: Simplify3D retraction before first layer
July 30, 2017 01:11PM

Registered: 10 years ago
Posts: 770

I just spit out some code in Cura and it doesnt have that.

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WZ9V

Re: Simplify3D retraction before first layer
September 20, 2017 09:32AM

Registered: 10 years ago
Posts: 293

Quote
DjDemonD

The first few commands are my start gcode, then after setting the units, G1 E-1 then the move to the first printing coordinate and then the unretract.
Does the S3D gcode also have an unretract, if so its not really a problem is it?

No it does not. So if you don't have a skirt or brim the print will be starved when it starts.

I'd use Cura instead but on my 3DLabPrint planes they don't work right, all internal structure is lost. 3DLabPrint says Slic3r won't work so I have not even tried it.

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