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paulsroom

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About paulsroom

  • Birthday 11/12/1947

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  1. From various investigations, I believe that the current specifications of the feeder spring are Outside diameter: 7.5mm Inside diameter: 5mm String diameter: 1.2mm Height: 20mm But I believe that there has also been a slightly weaker spring fitted to UM2 at some point Outside diameter: 7.5mm Inside diameter: 4.5mm String diameter: 1.2mm Height: 16mm Would this weaker spring still work okay and lessen the occurrence of filament getting stuck in the feeder?
  2. Does anyone know what the spring specifications are for the compression spring in the feeder unit at the back of the machine? And what are the details to order the specific one from a spring manufacturer? I had to disassemble the feeder unit for print core 1 because the wheels inside the feeder had crunched up the filament and was actually grinding it into powder. I discovered this when the filament got thoroughly stuck and would not unload. Unfortunately, although usually being very careful to put all the parts in a little container, the spring shot out and is somewhere in the room. At least I know it is in the room, but as a back-up I'd like to get a replacement spring if possible. I have concluded that the PLA filament I used was wet and so am drying it out by packing it in silica gel - my next option is to buy a food dehydrator and use that to dry out the filament. But first I need a complete feeder assembly.
  3. Thank you geert_2 that is an excellent link with very useful items and ideas. I believe I may now have cleared my filament stuck issues, I have thoroughly cleaned the print core area and Bowden tube with compressed air and the filament loads okay.
  4. I don't think that this thread has been messed up my question, because the link given by fbrrc8-erin deals with all Utimaker models - 2, 2extended, 3 and 3extended. The principle is the same for all. The Ultimaker 2 has one printcore while the Ultimaker 3 has two printcores. The Bowden tube and feeders are the same, just one set for 2 and 2extended and two sets for 3 and 3extended.
  5. The filament in core 1 has stuck a couple of times recently and would not unload without me pulling it at the feeder end. Since initially the filament was ColorFabb PLA and the proprietary Ultimaker PLA, I wondered if the composition was slightly different and thus sometimes result in sticking. I contacted ColorFabb and they didn't seem to know - maybe no one has ever asked them the question. Anyway now it is the proprietary Ultimaker PLA that has got stuck, but worse, it has broken off in the feeder and I can't load any filament. I am assuming that there is a piece of filament stuck in the feeder that's preventing a new filament from loading. The attached image shows that it is being squeezed - this is not the heated end, it is right at the start. What is the solution? I have unclogged the print core several times and have no problem disconnecting the Bowden tube, etc. at that end. But it suggests to me that feeder grabbers may have become displaced.
  6. I happy that I have correctly levelled the print bed and that the glass is either very clean or I am applying glue. Just before the print core gets ready to print, it extrudes about a 2mm strand of extraneous filament. This hangs from the nozzle and seems to interfere with the first printed line. As this is usually the skirt or brim line, it doesn't matter, if it is then absorbed into the further lines of this type. But then I think – I can't easily tell – when the nozzle moves to the model printing outline, it is still extruding this extraneous strand. That means that it doesn't starting printing properly until a short distance past the starting point. So there's a gap in the first printed outline. If it's capable of ignoring this and still building up layers, then this area is actually printed thinner than required. It may not pose a significant problem depending upon the model. But the starting printed outline can result in a vertical positioning of this extraneous strand and the gap. This is where the problem is because when the nozzle comes around to do the next line, it can easily get caught up in this arrangement and drag the printed layers along with the nozzle. That's when I have to abort the print and start again. My only option, if it works, is to pause the print and snip off any vertical strands. Then resume and hope that the gap doesn't cause a problem now. It's hit or miss.
  7. Well I only use the glue stick that was supplied with the printer. I'd have thought that hairspray was rather fierce for an adhesion method. Yes I think that it would be an idea to slow it down and I'll probably try that.
  8. Well before I went through the levelling procedure, I had washed the glass plates in warm soapy water and dried it thoroughly. First with a cotton cloth and then with a microfibre clth to ensure no strands of cotton remain or areas of grease. I also only touch the glass at the edges. But I'm going to clean the glass again before anything else.
  9. The Ultimaker 3 recognised the reels when I loaded them one at a time. And yes, the PVA filament has the read label on the side which is away from the filament holder. So it can only be fitted backwards, otherwise it won't be loaded correctly. So when I have the PVA and PLA loaded the read labels are sandwiched.
  10. I wanted to use the new Breakaway support material and also start dual colour printing - which I have not yet done. So I have had to change print core 2 from BB to AA. This seemed like an easy operation and it slotted in okay, but then of course I needed to re-level the print bed for the new arrangement. Well as you can see from the attached print, this hasn't worked properly. What's happening is that at some positions on the first layer, it is not sticking to the bed. As a consequence the nozzle grabs this loose string on its next path and simply destroys the print before it gets going. This happens with or without the glue stick applied. I am assuming that I need to re-level again. I did follow the instructions very carefully, so I can't see what I may do differently. Does this result suggest an unlevelled bed or or something else? I've shown what the print should like as displayed in Cura
  11. Thank you - that worked.
  12. A couple of times - but infrequently - my Ultimaker 3 has displayed the message 'too many filaments identified'. It happened soon after I bought the printer and now again after I changed the printcore from BB to AA. I've loaded Ultimaker PLA to ensure that everything is compatible. Since the display won't disappear until I turn the printer off, is there a way to cancel a command and what might be the cause of the confusion?
  13. I bought my Ultimaker 3 a couple of months ago and have been regularly printing various models since. Initially I started printing support structure using PVA, but since this increased the printing time very considerably, I decided to try printing the support structure with the model filament itself. The results are amazing, the surface is incredibly smooth with no evidence of support structure having been used. I did however notice some stringing occurring on the support itself. Since this didn't attach to the model I haven't bothered making any adjustment settings. But I've always believed that the filament colour has an effect on such occurrences - I've only used PLA so far (Ultimaker brand and ColorFabb). I've printed flat print-in-place models successfully and the parts moved immediately as they were removed from the print bed. However print-in-place models with integrated ball joints could pose a problem with possible stringing. One model failed (articulated puppy dog) after two goes at repositioning on the print bed - the limbs did not move, they broke off. If I make adjustments to the settings, am I likely to resolve stringing on the support but then adversely effect the model surface quality?
  14. I bought my Ultimaker3 a couple of months ago and while it is excellent in printing PLA, I am unable to get the PVA from extruding properly. I have loaded and unloaded the PVA, stored it in an airtight bag while not using it, cleaned out the BB print core, but get the same result each time. I can only speculate, but it seems to me that there is a problem with the feeder - too little pressure. Can anyone suggest what might be wrong and perhaps advise on a resolution?
  15. Both of these products look very valuable in keeping the filament dry. I have just bought an Ultimaker 3 and so am looking at all the different features, both of the printer and all associated products. I have a couple of questions :- 1. I am assuming that the filament feeding from either of these boxes still has to be fed by the filament feeder on the back of the machine? Otherwise how would it feed to the print cores? 2. If the filament is fed directly from the protection boxes and not on the reel holder on the printer, then I assume that it bypasses the filament recognition device on Ultimaker 3 filament reels. In which case this function becomes obsolete and it is the LED display that has to be set to whatever filament is used?
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