UltiMaker uses functional, analytical and tracking cookies. Tracking cookies enhance your experience on our website and may also collect your personal data outside of Ultimaker websites. If you agree with the use of tracking cookies, click “I agree, continue browsing”. You can withdraw your consent at any time. If you do not consent with the use of tracking cookies, click “Refuse”. You can find more information about cookies on our Privacy and Cookie Policy page.
Strange "M82; absolute extruder mode" being added to start gcode
Posted
· Strange "M82; absolute extruder mode" being added to start gcode
There are 3 ways for Cura to calculate the extrusion E numbers. Absolute, Relative, and Volumetric. There needs to be synchronicity between the various components so they understand each other.
That file is sliced in "Absolute" mode and so there is an M82 line to inform the printer of that. Since you have Octoprint between the printer and the slicer, you may need to change a setting in Octoprint.
Under "Special Modes" you will find "Relative Extrusion". When selected it will add an "M83" after your start up gcode. That will negate the M82, but as I say, that file is sliced in Absolute Mode so telling the printer to reset to 0 after every line of Gcode (that's what Relative does) will make a mess.
In addition you have the standard lines that are included with the Ender 3 definition file:
G1 Z2.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed
G1 X0.1 Y20 Z0.3 F5000.0 ; Move to start position
G1 X0.1 Y200.0 Z0.3 F1500.0 E15 ; Draw the first line
G1 X0.4 Y200.0 Z0.3 F5000.0 ; Move to side a little
G1 X0.4 Y20 Z0.3 F1500.0 E30 ; Draw the second line
G92 E0 ; Reset Extruder
G1 Z2.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed
G1 X5 Y20 Z0.3 F5000.0 ; Move over to prevent blob squish
G92 E0
G92 E0
G1 F1800 E-5
Those extrusions are in Absolute mode and so there is an M82 before them.
🚀 Help Shape the Future of Cura and Digital Factory – Join Our Power User Research Program!
We’re looking for active users of Cura and Digital Factory — across professional and educational use cases — to help us improve the next generation of our tools.
Our Power User Research Program kicks off with a quick 15-minute interview to learn about your setup and workflows. If selected, you’ll be invited into a small group of users who get early access to features and help us shape the future of 3D printing software.
🧪 What to Expect:
A short 15-minute kickoff interview to help us get to know you If selected, bi-monthly research sessions (15–30 minutes) where we’ll test features, review workflows, or gather feedback Occasional invites to try out early prototypes or vote on upcoming improvements
🎁 What You’ll Get:
Selected participants receive a free 1-year Studio or Classroom license Early access to new features and tools A direct voice in what we build next
👉 Interested? Please fill out this quick form
Your feedback helps us make Cura Cloud more powerful, more intuitive, and more aligned with how you actually print and manage your workflow.
Thanks for being part of the community,
The full stable release of Cura 5.10 has arrived, and it brings support for the new Ultimaker S8, as well as new materials and profiles for previously supported UltiMaker printers. Additionally, you can now control your models in Cura using a 3D SpaceMouse and more!
Recommended Posts
GregValiant 1,492
There are 3 ways for Cura to calculate the extrusion E numbers. Absolute, Relative, and Volumetric. There needs to be synchronicity between the various components so they understand each other.
That file is sliced in "Absolute" mode and so there is an M82 line to inform the printer of that. Since you have Octoprint between the printer and the slicer, you may need to change a setting in Octoprint.
Under "Special Modes" you will find "Relative Extrusion". When selected it will add an "M83" after your start up gcode. That will negate the M82, but as I say, that file is sliced in Absolute Mode so telling the printer to reset to 0 after every line of Gcode (that's what Relative does) will make a mess.
In addition you have the standard lines that are included with the Ender 3 definition file:
G1 Z2.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed
G1 X0.1 Y20 Z0.3 F5000.0 ; Move to start position
G1 X0.1 Y200.0 Z0.3 F1500.0 E15 ; Draw the first line
G1 X0.4 Y200.0 Z0.3 F5000.0 ; Move to side a little
G1 X0.4 Y20 Z0.3 F1500.0 E30 ; Draw the second line
G92 E0 ; Reset Extruder
G1 Z2.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed
G1 X5 Y20 Z0.3 F5000.0 ; Move over to prevent blob squish
G92 E0
G92 E0
G1 F1800 E-5
Those extrusions are in Absolute mode and so there is an M82 before them.
Link to post
Share on other sites