Before anyone wonders I will start by saying that the word on the opener in the picture is an internal joke between me and a friend and has very little to do with this topic. It was just the model that I printed when I realized there was a difference in printing quality between our Ultimaker original and our UM2.
This is my first post in the forum but I am an old Ultimaker fan and user.
We have an old Ultimaker original (about 2,5 years old) at our office and since we bought an UM2 it has not got the attention it deserves =(
But yesterday we test printed the classic bottle opener just to see if it was still working and as always, it worked like a charm =)
This is the model: http://www.thingiverse.com/thing:6661
And I just made holes for the text in cinema 4D
I felt that the print came out really nice. I would say nicer than in the UM2...
So I decided to take the same SD-card with the same UM1 g-code and print it in the UM2, with the exact same roll of filament. So the only difference would be the machines and the heated bed.
What we saw was that there's a lot more ghosting on our UM2.
In the attached picture I have increased the contrast so that it's easer to see the difference.
You may for example look at the part by the hole in the back of the opener (see the circle on the left side) or anywhere around the text. You can also see it at the curve in the model in the middle (it starts around the end of the D and ends around the A, where the light reflects on the model)
There was also an issue with the first layers, where the UM2 had problems printing the angle of the first part of the print (the bottom part of both models, see the green circle on the right side).
This is a bit hard to explain but i will give it a try.
What happened was that the layers got slightly warped around the edge since the angle and the layer height didn't place that much material around the outer perimeter on each layer. So the layers bended a bit inwards but as the layers became bigger in area the problem fixed it self.
That is why it looks like there's a notch in the angle caused by the warp and then the layers on top attached to that warped edge.
I had no problem getting the print to stick to the bed, so no warping there. It was just the outer perimeter on each layer that got a bit warped once it started to print the overhang.
Has anyone else experienced these issues?
A few notes on settings and the printers.
The settings in cura:
0.1 layer height
40mm/s print speed
The Ultimaker 2 had the printbed set to 60C
It should also be noted that we have upgraded our Ultimaker original with an Ulticontroller and and the special CNC pullies from Foehnsturm.
This could of course be part of the issue but it still feels like and interesting discussion. I hope you all agree.