dezorian

Thanks Daid, indeed this sounds logic.With the UM2 I had and have temperature problems when printing. I always have to identify the perfect temperature for each filament that I have. Especially with colorfabb filaments, wich melt like butter (print some of them at 178C°). I print slow and with high quality cause thats the only way I get resin like prints. However I also suspected that the hot air flow caused by the heated build plate and the nozzle itself put some extra temperature on the print. The layers dont cool fast enough and the temperature form the layers above spread to the lower layers causing them to store heat. At about 2 mm heigth the print starts to behave like chewgum. Which end always in a fail print. This happen to me on the UM1 and UM2. Does cura calculate the heat from the nozzel at low speed + the 50-60c° hot airflow when setting up the gcode? How do I set up the cool-head-lift, cant find it in cura? And how about the cool minimal layer time, do the layers have extra time to cool if i increase the sec. to lets say 10?

Thanks Guys. I think that the Temperature ist not the problem, else the nose would have warped down. But I agree that the fan position are not optimal due to the asymmetrical arrangement. Maybe there is a printable upgrade to optimize air flow like the ones on the UM1. I also think that it has to do with cura, especially with the gcode flavor: UltiGcode. I printed the head on a UM1 with gcode flavor: RepRap (Marlin/Sprinter) and I worked much better as u can see There is still a dot of filament but i could easily remove it with a knife. Also in the preview of cura the amount added at the end was less but still visible. I have tried these 3, you can see the differences: I dont know if unchecking the horrible fix a/b changes something but in the preview there is no difference. I have to try a print. In the past I encounter this problem with the UM1 but this was because the nozel didnt got out of the way at the end of the print fas enough. Wich I could altered in the end gcode. Problem is with the UltiGcode that you cant see or write the code. It only is visible when you select RepRap marlin. Therefore this must be to 99% a sofware/code problem. I own a UM1, UM2 and a Replicator 2. I also had few moths ago the new makerbot replicator fifth gen wich i send back because it was a piece of shit. In comparison I must say that Makerware is much better in handling Prints. I almost never got a fail print. With the UM / cura its always a guess work why things dont print out as planned. But the print quality is by far the best I have seen. Especially with 0.060 layer height. It´s like a resin printer. Well I will keep trying to solve the problem, I appreciate any suggestion If you get a solution for this problem.

Hi, I have the following problem: when printing this file I always get a blob at the end like this: I tired the same file on a makerbot (orange one) and it printed correctly. that leads me to the fact that the file is ok. Taking a closer look in cura i noticed some larger paths at the end of the object in the layers view . No matter how i position the object, cura always make an extra extrusion of filament at the end. The print is perfect till the last 1 or 2%. Has someone a solution to this problem? I have used these settings: