Because the Benchy is overrated I decided my first official print would be the Millenium Falcon scaled up by a factor of 2. So far I am 20 hours into this 40 hour print. Leaving the printer unattended at my office is very nerve racking but I built this printer for long unattended prints and it is performing flawlessly. The print quality of this particular print seems to have improved as the print has progressed.
I am having over extrusion issue with Cura and no matter what I change the Flow% to it has no affect on the actual amount of filament extruded. I am running an Azteeg X5 with latest Smoothie firmware. I may try volumetric extrusion and see if I can get better results. What do you guys think?
This is how the model is printed. Someone always makes that comment every time it is posted. An extra layer of hairspray right before the first layer is printed makes it stick like glue to the build plate.
True. I would not attempt this print on a Y axis bed mounted printer. I also have Z hop enabled which lifts the extruder 0.1mm above the print on rapid moves. I almost aborted this print due to the over extrusion issue, but I decided to just let it go and see what happens. 15 hours left!
@Adam_Steinmark I know! It’s really bugging the crap out of me. Before this print I was test printing 60mm calibration cubes and the over extrusion was very apparent on the first layer and subsequent 20% infill. Before I started this print I changed the filament diameter to 3.1mm in Cura in order to sort of trick it into extruding less. The first few layers of the Mellenium Falcon print there was obvious over extrusion. But as the print has progressed it appears to have improved…I also went with a random layer height of 0,25mm
I also think it could be that as well. However my nozzle is also my bed leveling sensor. The nozzle makes contact with the aluminum bed, exactly like the Lulzbot does with the aluminum corner discs.
However I have not figured out how to tell Cura or my firmware a positive probe offset. And changing the flow% in Cura at 100% or down to 5% has no affect. I have heard it mentioned a few times on forums that flow% in Cura sometimes does nothing and I’m curious if it has to do with different print controllers and firmware versions.
It’s set through the firmware. I use the M212 command but others use the M851 command. It depends on the firmware though. A quick Google search found me this link that should help you: http://smoothieware.org/zprobe . Just make sure you set your settings back to normal (extrusion multiplier to 100%, filament diameter back to 3mm, etc.) and make sure the extruder is calibrated correctly.
@Dape_Part Yes, 40hrs. I scaled it to 2:1. Overall height at 2:1 is around 14". Here are my print specs for the print:
Nozzle: 0.4mm
Print Speed: 40mm/sec
Rapid Travel: 80mm/sec
Layer Height: 0.25mm
Infill: 15%
@Karan_Chaphekar The holes were drilled and tapped into the extrusion pieces using a VMC. I am uploading the files to grabcad this weekend, still finishing some minor details on the design. Will share link here. Here is the build album: http://imgur.com/a/sPLMj
