I’ve just got a new Amazon Warehouse deal Lulzbot Mini, and have successfully downloaded and connected Cura 2.6.52 to drive it from my Windows 10 laptop.
It’s my second 3D printer, but I didn’t use my first one much (a Velleman K8200) so I’ve some but limited experience. And no previous experience of Cura in any version - I used Repetier Host for the Velleman.
This version of the Cura software looks very different from the enclosed printed User Guide, and also the downloadable user guide on the lulzbot.com website - maybe it will be updated soon?
However, in spite of that, I’ve successfully printed the test Rocktopus in PLA, and also a prototype of my own design - a food can cover for small cans (cans with 67mm OD) also in PLA. I printed them both at the medium speed and standard quality profile setting.
Both had problems starting properly, but at the second or third attempt I got good results from both. First attempts seemed to print as if the model wasn’t level on the bed in the software - the second Rocktopus ‘foot’ printed completely in the air, and didn’t stick to the bed. And the Mini didn’t draw a perimeter around it, until my later successful print. I aborted those prints at about layer 4 or 5.
In both cases, the successful print had an even and complete perimeter and first layer, so I don’t think the bed is mechanically too far off-level, and the Mini went through its automatic nozzle wiping and levelling routine first time both for the PLA prints and my latest attempts with ABS.
I’m now trying my first print in ABS filament from Rigid Inks. That particular filament isn’t listed in Cura, but I chose another ABS filament Material setting ABS (IC3D) without being able to see what its settings actually are - they don’t seem to display in the Print Monitor view. Recommended temperatures for the Rigid Inks ABS are hot-end 230-250°C and bed 90-95°C. [I’ve just worked out how to view the settings - see later.]
I’ve now tried three times, and get the same results each time. The left quadrant of the perimeter, and of the first layer of the can cover, are too thin, and blotchy. I attach an image of the latest attempt (the first two were virtually identical). I aborted the print, since it wouldn’t have been satisfactory.
I’ve checked that my can cover model is drawn level, and with its bottom flat on the x-y plane in Sketchup, from which I exported to STL.
I checked that Cura says the model is located at x=0, y=0, z=0.
I set this to print at high quality. Is that the problem compared to the first PLA prints at medium quality?
All the other settings are the Cura defaults for ABS (IC3D).
What might the problem be, and how can I correct it to get a successful print again?
Is the left hand side of the bed slightly too high, over-squashing the first layer on that side? If so, why, given that it worked fine for the PLA prints?
Is the temperature enough different from the Rigid Inks recommendation to matter (I’ve just worked out how to see the settings for IC3D filament - it has hot end 245°C which is in the Rigid Inks recommended range, and bed 105°C vs 90-95°C). Would that make much of a difference, to explain my failed print?
Is the first layer default setting squashing too much? If so, why is it only in one quadrant, the same one each time I’ve tried?
I think I’ll try again at medium quality settings while waiting for a response here.
Any help would be welcome.
I had hoped to print a few more things over Christmas, but until I understand better why this is happening, I may not be able to.