Sliced extruder values very high
I'm new to Prusaslicer and am having an issue where the G1 E-value is showing as large numbers in Gcode. Where I would expect an E-value to be a fraction of a mm for a regular move, it's exporting big numbers in mm to extrude at any given point. Here's just a sample for the skirt/brim:
G1 X-36.864 Y18.112 E3.63467
G1 X-45.266 Y-9.67 E4.61712
G1 X-45.552 Y-10.852 E4.65828
G1 X-45.752 Y-12.26 E4.70642
G1 X-45.778 Y-14.133 E4.76982
G1 X-45.657 Y-15.36 E4.81155
G1 X-45.477 Y-16.26 E4.84262
G1 X-44.713 Y-18.438 E4.92075
G1 X-43.801 Y-20.288 E4.99057
G1 X-42.946 Y-21.41 E5.03832
G1 X-42.091 Y-22.239 E5.07863
G1 X-40.629 Y-23.477 E5.14348
G1 X-38.927 Y-24.709 E5.2146
G1 X-14.672 Y-37.506 E6.14287
G1 X-13.237 Y-38.065 E6.195
G1 X-11.744 Y-38.455 E6.24723
G1 X-10.033 Y-38.694 E6.30571
G1 X-8.393 Y-38.724 E6.36123
G1 X-6.522 Y-38.512 E6.42497
G1 X33.448 Y-29.608 E7.81107
It keeps going up form there and at one point it just sits in the same spot to extrude 17mm of filament. This one model that is 71mm x 58mm x 120mm comes out at the staggering filament used of:
39,011,196.86g
13,079,815.32m
I've pored over the settings and can not figure out what could be causing such an inflation in the extrusion. Any help would be appreciated.
Best Answer by Sembazuru:
Notice that each E value is cumulatively larger. Looks to me that you have "Printers/General/Advanced/Use relative E distances:" turned off. (This setting only shows in Expert settings mode.) The Prusa default for their printers has that setting turned on, but the non Prusa printers that I have installed on my computer (Lulzbot Mini and Taz6, and Ultimaker 2 and 3) all have that setting turned off. The pop-up help for that setting states "If your firmware requires relative E values, check this, otherwise leave it unchecked. Most firmwares use absolute values." Apparently Prusa printer firmware isn't "most firmwares" for this setting. 😉
What printer are you trying to export gcode for?
I noticed that too, but it still starts out at a high number. Then further on it resets for each separate kind of part. I have a an old FlashForge CreatorPro that I'm trying to get this to work for. I've used Simplify3d in the past without issue. The gcode that spits out has it in absolute values so I'm guessing that's what the machine wants. And when I try to print using PS gcode, it will sit in position and deposit milimeters of filament in globs as per instructed.
Check your start gcode. It is turning on extruder relative mode with M83, but you have relative mode turned off in the settings. Either turn on relative mode in your settings or comment out the M83 line in your start gcode.
RE: Sliced extruder values very high
Possibly your extrusion multiplier is set to 100 instead of 1?
MK4S/MMU3
RE: Sliced extruder values very high
It is indeed set to 1
RE: Sliced extruder values very high
If you can save your project to a .3mf file, then .zip and upload it here, maybe we can help you analyze it.
MK4S/MMU3
RE:
Notice that each E value is cumulatively larger. Looks to me that you have "Printers/General/Advanced/Use relative E distances:" turned off. (This setting only shows in Expert settings mode.) The Prusa default for their printers has that setting turned on, but the non Prusa printers that I have installed on my computer (Lulzbot Mini and Taz6, and Ultimaker 2 and 3) all have that setting turned off. The pop-up help for that setting states "If your firmware requires relative E values, check this, otherwise leave it unchecked. Most firmwares use absolute values." Apparently Prusa printer firmware isn't "most firmwares" for this setting. 😉
What printer are you trying to export gcode for?
See my (limited) designs on:
Printables - https://www.printables.com/@Sembazuru
Thingiverse - https://www.thingiverse.com/Sembazuru/designs
RE: Sliced extruder values very high
Little to go on here. No mentioning of what printer, no 3mf project file to check settings.
Formerly known on this forum as @fuchsr -- https://foxrun3d.com/
RE: Sliced extruder values very high
Notice that each E value is cumulatively larger. Looks to me that you have "Printers/General/Advanced/Use relative E distances:" turned off. (This setting only shows in Expert settings mode.) The Prusa default for their printers has that setting turned on, but the non Prusa printers that I have installed on my computer (Lulzbot Mini and Taz6, and Ultimaker 2 and 3) all have that setting turned off. The pop-up help for that setting states "If your firmware requires relative E values, check this, otherwise leave it unchecked. Most firmwares use absolute values." Apparently Prusa printer firmware isn't "most firmwares" for this setting. 😉
What printer are you trying to export gcode for?
I noticed that too, but it still starts out at a high number. Then further on it resets for each separate kind of part. I have a an old FlashForge CreatorPro that I'm trying to get this to work for. I've used Simplify3d in the past without issue. The gcode that spits out has it in absolute values so I'm guessing that's what the machine wants. And when I try to print using PS gcode, it will sit in position and deposit milimeters of filament in globs as per instructed.
RE: Sliced extruder values very high
Notice that each E value is cumulatively larger. Looks to me that you have "Printers/General/Advanced/Use relative E distances:" turned off. (This setting only shows in Expert settings mode.) The Prusa default for their printers has that setting turned on, but the non Prusa printers that I have installed on my computer (Lulzbot Mini and Taz6, and Ultimaker 2 and 3) all have that setting turned off. The pop-up help for that setting states "If your firmware requires relative E values, check this, otherwise leave it unchecked. Most firmwares use absolute values." Apparently Prusa printer firmware isn't "most firmwares" for this setting. 😉
What printer are you trying to export gcode for?
I noticed that too, but it still starts out at a high number. Then further on it resets for each separate kind of part. I have a an old FlashForge CreatorPro that I'm trying to get this to work for. I've used Simplify3d in the past without issue. The gcode that spits out has it in absolute values so I'm guessing that's what the machine wants. And when I try to print using PS gcode, it will sit in position and deposit milimeters of filament in globs as per instructed.
Check your start gcode. It is turning on extruder relative mode with M83, but you have relative mode turned off in the settings. Either turn on relative mode in your settings or comment out the M83 line in your start gcode.
See my (limited) designs on:
Printables - https://www.printables.com/@Sembazuru
Thingiverse - https://www.thingiverse.com/Sembazuru/designs
RE: Sliced extruder values very high
That did the trick. Thanks