pimdeg

After a succesfull project using my Ultimaker 1, the company i work at got a Ultimaker 2. Using PLA we are seeing the same problems as described in this thread. Using white i got some interesting failures, with the most prominent one a coral reef like effect. Printing hotter helps as does printing in ABS (which has its own set of problems like warp and delamination). Comparing the Ultimaker 1 with the Ultimaker 2 the UM2 underperforms. I did a test where i printed cubes 20x20x20mm using red PLA at 220C and weighed them: What you see is that the Ultimaker 1 can sustain higher extrusion rates. While the UM2 creates a coral reef at 5mm³/s, the UM1 still creates acceptable results. At 7mm³/s you start to see underextrusion lines and at 10mm³/s holes start to appear. But it is not as bad as the UM2. While not displayed in this graph, white PLA fails even faster. So we are a bit disappointed with the Ultimaker 2. We want to be able to use the printer at the 3/4mm³/s range using any color PLA and it gives problems at that speed, while the UM1 didnt.