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.
Cura 4.8 Why unload all the filament after initial positioning
Posted
(edited)
· Cura 4.8 Why unload all the filament after initial positioning
Did you install the printer in Cura as a "custom" printer or did you use a definition and alter it? I think the problem you are experiencing is more related to "when did I turn on the machine and what did I do" than to USB/SD card.
This is from the startup Gcode in that file:
G28 X0 Y0 ;move X/Y to min endstops
G28 Z0 ;move Z to min endstops
G1 Z1 F1000 ;move up slightly
G1 Y60.0 Z0 E9.0 F1000.0;intro line
G1 Y100.0 E21.5 F1000.0 ;continue line
G92 E0 ;zero the extruded length again
There is no G92 E0 before the first line of extrusion. If the extruder has a previous location, it is moving to E9 before it does anything else. If it is starting out for example at E456 then yes, it is going to do a very long retraction before starting to print. If you turn on the printer and it's fresh the E is at 0 so the Gcode works as expected whether it's via USB or from the SD card.
In regards to that first extrusion line - it starts at X0 Y0 Z1.0 and extrudes 9mm of plastic to X0 Y60.0 Z0. Then the second part of the extrusion in the next line is 40mm long but also at a Z of 0. The printer is being asked to squeeze 12.5mm of filament into a space of zero volume. Not good.
I suggest that you go into "Machine Settings / Start-Up Gcode" and make the following changes:
G28 X0 Y0 ;move X/Y to min endstops
G28 Z0 ;move Z to min endstops
G92 E-5 ; Add this line to set E location to a slight retraction
G1 Z0.2 F1000 ;move up slightly ;Change this line
G1 F3000 E0 ;Add this line to prime the nozzle - it may leave a little puddle.
G1 Y60.0 Z0.2 E3.0F1500.0;intro line ;Change this line. The 3.0 is for a .4 nozzle at 150% flow.
G1 Y100.0 E5.0F1500.0 ;continue line ;Change this line to continue at a decent flow.
Edited by GregValiant
Link to post
Share on other sites
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Are you a startup using 3D printing? Perhaps you should continue reading...
Together with BASF we are launching the Forward AM Innovation Award - the very first global contest for startups developing new applications with 3D printing!
Why apply?
The winning startup will receive €100,000 in goods and services*, along with coaching and marketing exposure from top-notch leaders in the industry.
Who can apply?
Your startup creates products using Additive Manufacturing, is less than 5 years old, and has less than 50 employees. We are looking for 3D printing applications with a strong focus on innovation, sustainability and scalability.
Dental aligners, shoes, tools, automotive parts, music instruments, industrial tooling and molding, medical implants, sports equipment, toys, architecture, fashion, construction... all are welcome to join!
Do you have an innovative, sustainable and scalable idea that leverages the unique possibilities of 3D printing? Then it is time to apply!
More information can be found here.
Applications close on March 28th, 2021
* What does "in goods and services" mean?
The winner will be able to pick any item from the overall product and service portfolio of the sponsors, e.g. printers, materials, consulting, software... Choose whatever you need to accelerate your startup.
Often getting started is the most difficult part of any process. A good start sets you up for success and saves you time and energy that could be spent elsewhere. That is why we have a onboarding course ready for
Ultimaker S5 Pro Bundle, Ultimaker S5, Ultimaker S3 Ultimaker 2+ Connect.
They're ready for you on the Ultimaker Academy platform. All you need to do to gain access is to register your product to gain free access.
Ready? Register your product here in just 60 seconds.
Recommended Posts
GregValiant 208
Did you install the printer in Cura as a "custom" printer or did you use a definition and alter it? I think the problem you are experiencing is more related to "when did I turn on the machine and what did I do" than to USB/SD card.
This is from the startup Gcode in that file:
G28 X0 Y0 ;move X/Y to min endstops
G28 Z0 ;move Z to min endstops
G1 Z1 F1000 ;move up slightly
G1 Y60.0 Z0 E9.0 F1000.0;intro line
G1 Y100.0 E21.5 F1000.0 ;continue line
G92 E0 ;zero the extruded length again
There is no G92 E0 before the first line of extrusion. If the extruder has a previous location, it is moving to E9 before it does anything else. If it is starting out for example at E456 then yes, it is going to do a very long retraction before starting to print. If you turn on the printer and it's fresh the E is at 0 so the Gcode works as expected whether it's via USB or from the SD card.
In regards to that first extrusion line - it starts at X0 Y0 Z1.0 and extrudes 9mm of plastic to X0 Y60.0 Z0. Then the second part of the extrusion in the next line is 40mm long but also at a Z of 0. The printer is being asked to squeeze 12.5mm of filament into a space of zero volume. Not good.
I suggest that you go into "Machine Settings / Start-Up Gcode" and make the following changes:
G28 X0 Y0 ;move X/Y to min endstops
G28 Z0 ;move Z to min endstops
G92 E-5 ; Add this line to set E location to a slight retraction
G1 Z0.2 F1000 ;move up slightly ;Change this line
G1 F3000 E0 ;Add this line to prime the nozzle - it may leave a little puddle.
G1 Y60.0 Z0.2 E3.0 F1500.0;intro line ;Change this line. The 3.0 is for a .4 nozzle at 150% flow.
G1 Y100.0 E5.0 F1500.0 ;continue line ;Change this line to continue at a decent flow.
Edited by GregValiantLink to post
Share on other sites