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  1. I had roberts feeder since beggining. Actually, last week I printed all parts again (ABS), to make sure if everythings is all right with feeder. After extruder calibration (tinkergnome firmware), lines still not touching. EDIT: I changed roberts feeder to arjan design and I'm getting better results (still not perfect). Probably is something wrong with feeder (maybe stepper motor simply worn out?) EDIT - PROBLEM SOLVED Hi everyone, I changed feeder with E3D titan - and it works perfectly. So probably default motor was too week or knurled screw was worn out indeed.
  2. Hi, thanks for your answers. Rowiac, teflon coupler looks fine. I changed it last week. I use TFM couplers from 3dsolex. Labern, knurled feeder wheel is perfectly clean and it also looks good (Robert's feeder) I use UM2Go for 1 year, and it was fine. This issue is new to me. I print some test to check out if it's problem with axis rods - problem with lines not touching is visible on every part of bed.
  3. Hi guys! Again! I have an hardware issue with my UM2Go. But now, not everything is clear to me, so I decided to ask you guys. What is the problem: Lines are not touching - but only after first layer. First layer prints perfectly well. My first tought: - something is wrong with my print settings. So I changed it (slower speed, higher temp) - and nothing, lines still not touching. My second tought: - underextrusion - I checked PTFE tube - OK. I did atomic pulls - clean. Feeder not skipping or clicking. What I already did: - oil rods, tighten belts, lube Z-axis screw. And with no success - lines still not touching. - test on different filaments - always the same - lines still not touching. What is really strange, is that first layer is always perfect. Even if second and third layer are printing with same (as 1st layer) settings (higher temp, slow enough), lines are starting to not touching. My last test was relevelling bed while printing - and boom! Yes, it works (partially), because I have to calibrate bed after every layer. But after print is finished - nozzle are hitting bed (which is normal, because I constantly (layer after layer) have to raise bed a little. I've tried everything and I'm out of any options. Maybe Z-axis has some issue? Have you any ideas? PS.: UM2Go stats: ~c.a 4000 hours of printing. Greetings from Poland, Maciek.
  4. Yep, bowden tube is clear, without any debris etc. Yesterday I changed PTFE coupler, and after few fast prints, skipping is gone and underextrusion issue is no more a problem. Feeder skips sometimes, but it hasn't such a visible impact on my prints. In the end, I could say that worn PTFE coupler was a reason for skipping, so you we're right. New coupler minimalized skipping significantly, but not completely Anyway, I'm happy with the results
  5. Hey guys, thank you for your advices - I changed PTFE coupler. But there is no result, feeder skipping is still an issue, but feeder skips more rarely than before. So I think I have to look further :(
  6. Unfortunately, shops in Europe are out of stock. So you are my only option I have just sent you a PM about ordering bundle to Poland.
  7. PLA only (Innofil). 350 h in only one month. Let's say, GO was busy I started to looking for a good replacement for old PTFE coupler. I found this nice set: http://shop3d.ca/product/ultimaker-tfm-coupler-and-tfm-isolator-bundle/ (I just looked on your profile pic ) Second option is to buy PTFE rod and make coupler on my own. I have good friends in workshop, so they probably can do it for me. I was thinking about PTFE mixed with coal or fiberglass. I read this type of PTFE will last longer. But buying this set is also good idea. I have to contact shop3D.ca and eventually order it.
  8. My runtime statistics on UM2Go is 350h of printing. But feeder skipping issue starts earlier. I print for 16h daily, so changing PTFE coupler too often is not an option for me (but maybe it is necessary). I think I got spare parts included in my GO package from distributor.
  9. Hi everyone, sadly it is my first post on forum (but I'm reading many topics before, but more in incognito mode:)) and it is troubleshooting issue. I have UM2+ and UM2Go. I am very happy with these printers, but UM2Go is constantly have a problem with feeder skipping. I have read many topics with great advices, but any of these work with my printer. What I already did: 1) Atomic pulls - so many many many times. 2) Loosen 4 screw on top printer head a little bit 3) Installing |roberts| feeder (Oh man, I love your design) What you have to know: 1) Skipping is not happening on bottom layer - (it is on every one) 2) My settings: 2.1) 0.2 layer height 2.2) 40mm/s^2 speed (is so slow comparing to UM2+ :() 2.3) 225'C temperature 2.4) Filament: Innofil White PLA Firstly, I thought it may be clogged nozzle. After many Atomic pulls - it make no difference - still skipping. Bed calibration? No, because skipping is happening on upper layers (funny - because on first layer I never got problem with skipping). I was experimenting with temperatures, but still the same. With 215'C or 230'C feeder still is skipping (maybe more or less regularly but still skipping). I exluded a issues with printer head blockage, because of this: As you can see - it skipping being free in bowden tube. In this video you can see, that feeder is skipping only going forward. But it happening also when I moving it backwards - not on this video (then only solution is pulling filament with hands with quite force). I honestly admint - I don't know what to do next. This skipping issue is killing me. And it results with underextrusion and it's baaad. Guys, I'm looking for your help! PS.: I printed |roberts| feeder using PLA - I think ABS is better option, but back then I didn't have any spool of ABS. Maybe there is a problem with skipping?
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