Projects:LulzBot Mini 3D Printer
|LulzBot Mini 3D Printer|
|Description||A high-performance desktop 3D printer|
|People||User:Nordin, User:others welcome|
About the Space 3D Printer
The lulzbot has been setup next to the Kossel 3D printer and connected to power and a Dell laptop. There are printed instructions located to the side of the printer and new users are recommended to read these before using the printer. These are also available online.
How to 3D print an STL
Currently, the LulzBot is connected to a Dell Inspiron Mini 10 netbook running Lubuntu - one of the few Ubuntu bionic distros fitting the netbook's CPU and SSD specs. There is a 'Lulzbot' labelled USB stick with cross-platform Cura software installers should users wish to use their own laptop for slicing and printing. An Octopi setup is currently being built to allow for a webgui. Updates will follow.
Printing is very easy since the Lulzbot came as a complete product. In a nutshell, you only need to power on the printer and Dell laptop, load Cura from the desktop, load the model, click the 'Control' icon from the 3D Window and and hit print from the resulting popup.
The printer automatically levels and head-cleans at the start of each print, but do ensure the bed is clean and that you have enough printing filament for your print.
Making Your Model
We advise OpenSCAD for the model design, ensure you have enough faces on any circular elements, and export as an stl. The Dell netbook UI and speed is rather painful to use for 3D design, so it is suggested that users use another machine to develop models.
Loading the model on desktop software
Using the Lulzbot edition of Cura, Load the STL from USB using the file-open dialogue and follow the instructions found in the manual and/or quick start guide.
Replacing the 3D Filament
Full instructions are provided in the quick start guide, however the steps can be summised via the following:
- Heat up the hothead heating element to 205deg
- Hand-turn the two bolts holding the idler retainer on the head assembly tight
- Move the idler retainer outwards to release the tension on the hinged idler
- Withdraw the old filament from the feedhole and swap out
- Close the hinged idler, swing back the idler retainer and retighten the bolts.
- Extrude some test filament using the Cura interface
- Turn off the hothead heater
Support material is missing from my print
It was found that on the netbook at least, Cura unticks the "Print support material" settings on it own sometimes (perhaps a UI glitch?). Recommend double-checking just before clicking the "control" button to print.
A dirty printhead causing auto-levelling sensing to trigger late.
The autoleveling routine (which starts before every print) seems to use ground(?) sensing of metal hothead at 4 corner plate locations to get the level. The head wipes itself on a brush-mat before levelling and occasionally fluff from the mat sticks to the head making the tip-to-cornerplate contact less clean and push down harder than it needs to. If, when autoleveling, the head appears to move too far towards the bed and bends the sprung bed plane, stop the motors via the UI (if possible), rehome the head, clean it manually and reprint. If the bad-levelling continues, the head will at best print very squashed early layers and scrape layers during transit.
UI is not responding to 'Stop all motors' command
If the UI takes too long to kill the motors after glitching, power off the machine via it's power switch, and pull the USB from the laptop (as the laptop USB 5v appears to keep the Lulzbot board powered) and start again. The autoleveling routine retracts some filament before commencing so you should heat the head to 205deg and extrude filament before reprinting.