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About sg7019

  • Birthday 01/01/2015

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  • 3D printer
    Ultimaker 2
  1. Thanks for the info, it didn't seem right. I've looked at the assembly guide on github and as there is no spacer on the side of the double pulley I guess it does have to be pushed to the side, but there is no info on how close it should be to the bearing. I've built a Printrbot and maintained a couple of others but there is info available for those and the github manual for the UM2 is not very detailed, I don't want to damage such an investment or worse have it perform under par. Right now I'm very new to this machine, I don't even know how to get the head out of the home position so I can get access to that corner. I've had a feeder build issue, a cracked printhead on delivery, this axle problem and in the background a significant under-extrusion issue (stepper skipping on all but the simplest of prints). I've seen great quality out of some prints I've made, surpassing my other machines, but I wonder what is next. I know better than to expect trouble free operation but I did hope that for the price the machine could at least be assembled well.
  2. Thanks for the info, in the absence of any instructions I was guessing at a completely different approach of disconnecting the wiring loom and sliding the top of the printhead off back down the cable loom. I hadn't put much thought into it yet
  3. I took the feeder apart and pulled the jammed filament out of the Bowden tube. Subsequent attempts to load filament have been OK. thanks, Steve
  4. A quick question, does the back axle of your UM2 remain flush with the housing or move to one side? I have a new machine and it started off flush but is now protruding. The front axle remains flush. looking at the online assembly guide it seems there is no spacer on the left hand side so some movement is likely. Is it expected to move and find a natural 'home' position or is there something wrong? The machine appears to be printing OK (apart from under extrusion but that is under investigation) but I have some concerns about the assembly of this printer and I'm wondering if this is normal. cheers, Steve
  5. Hi, After some initial feeder problems I've been able to make some prints with my UM2. While watching my first print (MiniCalTest) I noticed a crack in the top layer of the printhead. I don't know if this is due to over tightening during manufacture. It may be mostly cosmetic, the assembly seems rigid and several prints have gone through OK but this is not what I expect from a new printer. I see some other posts about printhead cracks, they seem to occur over time, is it common for a UM2 to be delivered like this? And what if any impact this is likely to have. I can't see the crack getting any better so I expect the printhead casing will need to be replaced, just debating whether I return the printer or just acknowledge I will have to repair it at some point in the future if it gets worse. I've already had to work on the feeder but this looks to be a much bigger job.
  6. Thanks for the suggestions. I am using the wizard, I tried once more just now and the filament did not move at all during the high speed take up or afterwards. The sleeve is turning but I suspect the filament at that point is seriously ground down and even pushing myself isn't helping advance. The filament is the supplied UM roll. With my micrometer I found it to fall somewhere > 2.85 but < 3, certainly it varies a lot more than the ColorFab or PB 1.75mm I've been using in my other machines. I did check the tension, it is where it should be at the top. The second photo shows the crushed spots on the filament, I'm not sure if that is enough to block the Bowden. cheers, Steve
  7. Hi, Just received my UM2, leveling was straightforward but feeding the (Ultimaker supplied) filament was not. It was difficult to get into the feeder but the instructions said some force may be required so I helped it along. There was clicking of the stepper but that was also expected. When I couldn't get it to move far I turned the printer off and repeated the start-up sequence. Filament got a little further but the feeder seems jammed. The filament is about 4inches into the Bowden, there are some ground/flat spots While it can probably advance further something is not right, I think now the flat spots are causing to much friction in the Bowden tube Every time I start it up it goes to the first time menu so I can't get to filament advance/extract menus, I don't know if there is any way to get out of this menu mode without completing it I tried to remove the Bowden tube from the feeder but everything seems locked together by the filament, I removed clip, pushed down white collar and pulled with no luck although I didn't try much force. I'm not sure what to do. This is my 4th printer including one kit build but also my first Bowden feed. I've looked at the build instructions and also some articles describing alternate feeders so I'm reasonably confident to take the feeder apart, clean it up and pull the filament out of the Bowden if this is necessary (I don't have any other ideas). Of course this fix doesn't explain what went wrong initially but getting out of the current mess is the first step. I don't really want to start stripping down a brand new machine but my other printers have shown me that there are always challenges. Any thoughts on best way to proceed most welcome. cheers, Steve
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