BJC

Ultimaker 3 Location: Central London, UK Asking for: £2300 Selling Ultimaker 3, owned for about 2.5 years. Machine that has been well taken care of. I can also include filaments I still have. Prefer local pickup. Please DM me for any questions, pictures, or inquiry. Thanks.

I just serviced my UM3 and thinking about selling it, PM me if you are still looking for a UM.

So it's been couple months since I posted a few times on retraction and jamming issue with the feeder. It seems like it is getting worse. I've tried default settings, I've tried settings recommended from user posts, I've play around with settings anywhere in between these recommendations like retraction distance, times, temperature, object size, nothings seems to work. I've tried printing less objects on the build plate, and I've even tried printing the SAME object twice, and one would be flawless while the other would be a complete mess. I've attached a picture of said object. A bunch of objects that takes 3 hours to print would costs me 5 because of constant jam and I need to disassemble the feeder and clean it. The filament wasted after cutting the jammed piece is more than the filament used to print objects, literally half the filament of a spool is wasted because of ground up filament that cannot be used. It's getting really frustrating as I got the ultimaker because I wanted smooth operation, not constantly manual babysitting and maintenance. Could it be the case I just got a lemon? If someone could offer can advice/suggestion/fixes, it would be greatly appreciated.

Yea I'm sure now it's the retraction, because when I pull the filament out, there is not just one grind point, but like 4 severe grind points. Thank you so much for your help.

So I fixed it, started printing and everything is running smooth until the print near the end again where the print is all messed up. So the feeder is grinding the filament again. I cleaned everything according to the manual (taking the feeder apart), the feeder doesn't seem to have any broken parts or wear. The bowen tube seems to be fine and unbroken. The filament I'm currently using is Ultimaker White PLA, and feeder tension setting is set at the recommended (right at the middle mark). I've printed a few items after I got the printer and everything was fine. Until this new print.... The print I'm trying to print is a scaled down park, with very very small details and very compact features. Lines and features are around 0.4mm to 0.8mm. Biggest features are 1-3mm walls and blocks. I've printed a first version of the park with less details and less compact features and it was fine. After I added all the extremely fine details and features that's when the feeder is jamming, twice, with the same print. Some features are so fine it shows up on my 3d software (Rhino) and cura, but doesn't actually get printed (0.3-0.35mm). Again, the print twice has always been fine from start to near finish, it is only near the top with all the fine features when it starts to under extrude and jam. So my observation leads me to believe my revision to my model is causing the printer feeder to jam. Is that even possible?

I did a 3d print last night and near the end, the print became loose and what seems to be under extruding. This morning a new print and I can see barely any filament is coming out. I finally realize the feeder has chewed the filament and is not pushing filament out. I tried consulting the manual and pulling the filament hard but it just don't move. I can see the feeder gear spinning when I try to 'unload' the materials, but no matter how hard I pull, it just won't move. Here are my questions: 1. How do I unload the feeder now? Do I just have to pull hard enough to yank the filament out? 2. How do I adjust the feeder so that chewing on the filament won't happened, the manual indicates how to do it physically, but no where does it let you know at what level is an appropriate setting on the gear? Thanks

Just got my UM3 and did a test print, machine ran smooth but the print could be improve. According the the makers, this test print is all about retraction settings. I also printed a long large screw, though the print was perfect, during print, I can see similar branches happening inside in the infill. So my question is, how can I improve so that the spikes are all perfect without the branches appearing? Retraction settings? Temperature/fan speed settings? Some of the settings of the actual print: Used the Cura 3.1 Fine preset -> 0.1 layer height, print speed 70, infill 20, filament is the metallic silver PLA that came with the UM3