Extruder running backwards on print?
I'm currently working on printing from a single extruder. The V2MMCalibration_ABS.gcode seems to print just fine, load and unload filament routines are working fine, however slicing my first model using Slic3r v1.35.5-prusa3d and the new presets results in no extrusion as the filament is running backwards. I checked the cable from the super switch to RAMBO and it looks right according to this picture:
Reference:
Mine:
I have octoprint hooked up as well. Manual extrude commands work... So I think it's the slicer...
And yes, now looking at the G-code, this doesn't seem right:
; generated by Slic3r 1.35.5-prusa3d on 2017-07-04 at 10:00:04
;
; external perimeters extrusion width = 0.45mm
; perimeters extrusion width = 0.45mm
; infill extrusion width = 0.45mm
; solid infill extrusion width = 0.45mm
; top infill extrusion width = 0.45mm
; first layer extrusion width = 0.42mm
M190 S100 ; set bed temperature and wait for it to be reached
M115 U3.0.12-RC1 ; tell printer latest fw version
; Start G-Code sequence START
T99
M109 S255
G21 ; set units to millimeters
G90 ; use absolute coordinates
M83 ; use relative distances for extrusion
G28 W
G80
G92 E0.0
M203 E100
M92 E140
G1 Z0.250 F7200.000
G1 X50.0 E80.0 F1000.0
G1 X160.0 E20.0 F1000.0
G1 Z0.200 F7200.000
G1 X220.0 E13 F1000.0
G1 X240.0 E0 F1000.0
G1 E-4 F1000.0
G92 E0.0
; Filament gcode
T99 is to "deselect tool" I never see it run another "T" code.
I definitely have the right extruder selected in Slic3r:
I'm trying not to overthink anything here, but I don't think I should have to manually enter the extruder G-code with the provided Slic3r and profiles, right? What am I missing here?
Bill Church
Saint Petersburg, Fl USA
Original Prusa i3 Mk3 Kit Stock v3.8.1-2869
Original Prusa i3 Mk2 Kit Stock v3.2.3
Re: Extruder running backwards on print?
Maybe Solved? Ok, so I didn't realize that even if you're printing from a single extruder, you need to run the Gcode through the Multi Material post processor. I did that and I see the G-code actually now has a T0 in place of a T99...
I'm waiting for it to heat up and print, but that's probably got it.
If I'm just printing from a single extruder, is it ok to change the start G-code from T99 to T0? Thinking I just create a separate printer profile for this...
Weird that it runs backwards, or at all with T99...
Bill Church
Saint Petersburg, Fl USA
Original Prusa i3 Mk3 Kit Stock v3.8.1-2869
Original Prusa i3 Mk2 Kit Stock v3.2.3
Re: Extruder running backwards on print?
See this post: http://shop.prusa3d.com/forum/original-prusa-i3-mk2-multimaterial-f26/extrusion-coming-late-t4904-s10.html#p35971
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: Extruder running backwards on print?
Thanks Peter, that makes sense... What doesn't make sense is this is the most recent version of the profile from PRUSA, so it shouldn't be "outdated".
Re: Extrusion Coming Late
Tue Jun 27, 2017 3:37 pm
Your slic3r star g-code shall contain the following line:
T[initial_tool]
The [initial_tool] will be replaced by the starting extruder id.
I believe you either use an outdated or incorrect Slic3r profile.
I'm just trying to be a normal consumer and not overthink things, I guess that's what I get... lol
I did a diff of the G-Code before and after and the major differences I saw were related to the start and stop g-code which is easy enough to modify... Just wanted to make sure I wasn't going crazy... Going to copy that printer profile and make a new one for single extruder prints I guess.
Bill Church
Saint Petersburg, Fl USA
Original Prusa i3 Mk3 Kit Stock v3.8.1-2869
Original Prusa i3 Mk2 Kit Stock v3.2.3
Re: Extruder running backwards on print?
Of course, us KISS users don't suffer these issues ... 😉
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…