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  1. I wanted to resurrect this issue again as time has passed, Cura has had some revisions and this still drives me nuts. Does anyone know a UM contact they could tag that my able to look into my original post, as I think I have an idea that could be fairly easy to implement and would also fix other users issue of secondary nozzle ooze in their prints. If just to hear some imput from UM would be great. The idea is to have a prime tower consisting of an inner and outer rings/perimeters. The outer perimeter of the prime tower is printed during the nozzle warm up phase as is i
  2. @geert_2, we haven't specifically tried any colorfabb materials. Unfortunately its not readily available in our country and is in the upper price bracket. I may order a spool as I have a job coming up where I need to purchase 15kg of steelfill from them. As for the holes, we don't use PVA. My personal opinion of PVA is that its terrible lol! My favorite is Ultimaker breakaway, and I use it solely as a support interface layer, it works wonders. But you are correct, about the tiny strings embedded into the walls of models. This happens both with PVA and Breakaway. The PLA when dissol
  3. So I read the very first part of cloakfiend’s post and I was correct in stating PLA basically goes untouched by Acetone. It is only some brands that can be polished because they add modifiers to their PLA blends to improve the material characteristics and printing processes. Whilst I would love to switch to a brand that utilises modifiers in their PLA so it can be smoothed with acetone, for investment casting this is not an option 😞 The reason we use PLA for investment casting comes down to the characteristics of the plastic when it is being burnt out of the ceramic mou
  4. @geert_2, thanks for the info. So we typically chemical vapor polish most of the prints to be used as casting patterns. As we use PLA the polishing chemical we use is Chloroform. We can achieve some phenomenally smooth prints this way, and I had always just assumed it would play a part in sealing up any small holes but upon further inspection, it doesn't really. What is interesting is that anything printed on the UM2's generally don't have issues with small holes. Only parts printed on the UM3s which leads me to believe the heat up and cool down process between nozzle s
  5. Hey guys, does anyone know if there is an option to park the print head in or near the prime tower while one print core cools down, and the other warms up? I see there are start printing and stop printing temperature that can be adjusted in Cura for each print core but I don’t think that adjusting these achieves what we want. I have noticed when the temperature transitions on particular layers that don’t require much extrusion, the head will park itself until the minimum temps are meet to carry on printing. All we were trying to do is let one nozzle cool to idle temp while the other heats to p
  6. @superdave42 I was contemplating this last night and found this post now seeing you have done it! I have 2 x UM2s I’m planing on converting to this setup do you have any further info on wiring... I’m wondering if you managed to retain the white 10wire print head cable? Or if you managed to utelise a common power supply or ground between any individual heaters and temp sensors? would be nice being able to use the 10pin connector to interface everything with no more than 10 wires.
  7. I recovered the firmware and no change. Also replaced the WIFI antenna and nothing 😞 Off to go get a network switch, wired connection still works...
  8. Interesting. I just restored one of my UM3's from a recovery file on a SD card. The printer was having wifi issues (would not create a hotspot) which did not solve the issue by the way. Have just been calibrating the XY offset which seems to be printing a different calibration layout to my other 2 UM3's (all same firmware). And have now just seen the error mentioned in this post. Have triple checked that core AA 0.4 was used in slicer, AA0.4 is in the machine, and machine also reads that AA0.4 is installed! Been a sad sad week for my fleet so far 😞
  9. Curious to see if you managed to resolve this? I too have the same issue. Would have been an early release UM3+ I have tried everything under the sun including reseating the antenna on the wifi board.
  10. Just had an idea that I’m surprised hasn’t been included in Cura yet. I know we can add a material cost to see what each print is going to cost us in filament but I thought it would be really great if I could use Cura to price up print jobs. just by adding a few inputs we could have cura spit out a total print price. This could include things like filament mark up %, hourly rate, ect. Could get pretty extreme with what you want to base your price on but for me I generally charge a hourly rate plus materials with a mark up. I think this this would be a grea
  11. Yep, I always check the layer view. Layers look perfect in Cura. When I put some pressure on the build plate so I can see the nozzle while it prints this problem layer, it actually looks like there is just not enough material coming out the nozzle (compared to any other layer). Anyway bedtime here (New Zealand) so I will tinker with a test piece once I have this job finished.
  12. Correct this is not UM PVA, but I don't know what brand it is (not labeled) as for the PLA im currently using, its made by Imagin Plastics (a local company reputable for high quality filaments) This particular print is for a client, and time is ticking.... I have had to slice the model into seperate sections to avoid overhangs and I will glue them together. I will draw up a small test piece in a couple of days and have a play with temps and speed. cheers!
  13. Ok so now I’m dumbfounded... I updated the um3 to the latest firmware, and leveled the bed + callibrated the offset. Deleted all cura profiles and reverted back to all the stock settings. Using the std cura um3 .15 layer height profile I still seem to have the same problem ? right now im totally lost. Perhaps it could potentially be something more sinister than firmware or slicing settings? The wifi board also seems to have failed as I cannot connect to wifi or run any update without a direct wan connection (this has been a problem for a long time though) F
  14. Thanks @tinkergnome I hadn’t considered the nozzle offset, so maybe I have overlooked the obvious! I only ever manually level the bed as I found it to be much more exact. let me check it out and report back
  15. Yeah sorry, the photo is a bit hard to understand without seeing the model. support interface thickness is set to 0.6 at 0.1mm layer height. I have just ramped it up to 1.0mm to see if that makes any difference but I don’t imagine it will. The pva interface always looks nice and sharp and clean. i have the z distance between model and support interface set to 0 is that correct? I have just tweaked it to 0.2 to see if that makes any distance. Perhaps having it set to 0 means the first pla layer is trying to print at the same layer height as the last layer of pva interfac
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