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  • Field of Work
    (Product) design
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  • 3D printer
    Ultimaker 3
  1. My suggestion: don't use PVA, use breakaway.
  2. Yes, every time when UM3 can't be connect I will go to "Connect via Network". For situation (3), no printer is listed so I will click on "Refresh" several times. But UM3 is still not listed. After power-cycle UM3, it will be listed in Cura automatically. For situation (2), UM3 is already listed there. The button "Print over network" is still available. But Cura will fail to send out the model when I click on the button.
  3. The wall is 0.3mm, not 0.6mm: (4.0 - 3.4)/2 = 0.3mm That's too thin even for injection mold. You might have to change your design.
  4. There seems having rule for the Wi-Fi issue. Here is the observed behavior. (1) Power on Mac --> Power on UM3 --> Keep Mac active during printing --> Print is done --> Cura can send the next model to UM3 without problem. (2) Power on Mac --> Power on UM3 --> Mac go to sleep during printing --> Print is done --> Wakeup Mac --> Cura can NOT send the next model to UM3. UM3 is still shown as connected in Cura. (3) Power on Mac --> Power on UM3 --> Power off Mac during printing --> Print is done --> Power on Mac --> Cura can NOT detect UM3. For situations (2) and (3), I have to power-cycle UM3 so that Cura can connect to it again. Hope that the observation is helpful for Ultimaker team to find the root cause.
  5. Thanks a lot! I will update it.
  6. I updated FW 5.2.11 when it is available. The auto-leveling function is working very well. But the Wi-Fi issue is still there. I still have to power-cycle UM3 so that it can be detected. Or, do I have to call customer service to replace the WI-Fi board? At least, my UM3 is usable now. I have noticed one issue with FW 5.2.8. If z-offset is used (say 0.05mm) then the nozzle will print in the air. There will be a big gap between nozzle and glass. But I don't test it on FW 5.2.11 yet. Could any one confirm this issue get fixed or not? There are too many models need to be printed ASAP... no much time to test/verify all issues.
  7. I experience the same kind of issue. Honestly speaking, it has been a disaster to me since v5.2 is updated. Here is a list of encountered problems. (1) The first thing I noticed is Wi-Fi get disconnected automatically. Then in Cura, UM3 is no longer discoverable. Now I have to power-cycle UM3 to get Wi-Fi connection work again. (2) Auto-leveling is unusable. In fact, it causes the prints to fail again and again. I also noticed the auto-leveling procedure will push the nozzle to the print-bed so.... hard. I am so afraid of the build-glass might get broken. So, I decided to turn auto-leveling off. (3) Then I thought manual-leveling might work. Yes and no. It does work... but I noticed two issues. (a) The print has a shorter height. I usually print a cube (10x10x10mm) to verify the accuracy. The height is around 9.82mm with 0.1mm layer height. But in the past (with the old firmware), it was always between 9.9 ~ 10.1mm. (b) The print is pretty difficult to be removed from the build-glass. Sometimes, I have to break the print to remove it. (4) For XY calibration... I don't want to test it any more. I use Ultimaker breakaway material for support. But the material is so expensive. I don't want to waste my money. Even I am an engineer, I don't want to open the machine and recovery it to old firmware because I know all those issues are caused by new firmware, not hardware. They all can be solved by hot-fixes. A fix is called "hot" because it is so critical for users to get it fixed ASAP. Now, I know the QA team have some for hot-fixes but JUST don't want to release. They want to release a new version and hope the new version will solve all the issues. If users complain lots of critical issues after Apple release new iPhone software and one of the issues will cause your iPhone failed to dial up then what will Apple do? I guess Apple will release a hot-fix for users ASAP. Apple won't say "Hey, please wait for us to fix all the issues. We don't want to release a hot-fix only for your iPhone able to dial up." We spend "a lot' of money to buy Ultimaker 3 not because it is for fun but because we believe it is a reliable machine for professional work. Some of the issues are so critical that it make me feel UM3 is no longer a reliable machine. It just does't work. But I know the root cause is the QA team behind it. They didn't fully test the firmware before release it and now they don't care about users' feeling. Ask yourself, what will Apple do? The QA team is wasting my (and other users) time, and time is money for me. I don't want to complain... if I want, I will post a lot of complains long time ago. I just want to tell the QA team "We don't need total solution at this moment. It will let me (and other users) feel much better if you can release hot-fixes one by one."
  8. The failure rate of PVA is too high so that I decide to give up PVA. Now I use breakaway filament for support. The result is so good. The bad news is the price is much more expensive than PVA.
  9. I have the same issue recently. For a new bed (glass), there is no issue. But after the glass is used for months, I start to get the issue. So, I think the characteristic of the glass surface must be different. There might be very small particles... or something... that can not be fully cleaned. I use 75% ethanol solution to clean the glass after each print. I may have to try other methods. You can try to take off the glass and clean it very carefully, or you can start to use glue, or change the glass with a new one.
  10. It is really cool. Thanks for sharing.
  11. Thanks smartavionics, the auto-orientation extension works. This workaround will save me a lot of time.
  12. ? Mine is UM3. I don't have UM2+ and don't know it doesn't support auto-leveling. As you, I don't use glue on glass. Before each print, I clean the glass by alcohol carefully. So far, I never encounter this kind of issue. So, this method works well for me. If you can find a solution then you probably have to replace the glass with a new one.... at least to test if it is due to the glass.
  13. Have you tried manual-leveling? Auto-Leveling uses the first layer to compensate the Z-offset. I think it could have problem if the offset is too large. Since you don't have the issue until recently, it might be caused by improper force while removing the prints. Or, someone played with your printer and you don't know that. The plate (under the glass) might be bended by the improper force. By doing a manual-leveling, you adjust the screws under the plate to ensure the offset is within a proper range. Then you can still use auto-leveling when printing.
  14. Hi Experts, I probably found a Cura-3.4.1 slicing bug. I am building an Ultrascope (http://www.openspaceagency.com/ultrascope), a printed telescope. The STL files are provided the Ultrascope team. The first STL file is recommended to be printed with layer height 0.15mm. But it fails to print. Look at the sliced layers, some part of the first few layers is missing. But when I use 0.1mm layer height, it is correct. The original STL file and screen snapshots of both 0.15mm and 0.1mm are attached. The right-hand side of 0.15mm has the issue. 1-Hexagon-1.stl
  15. Thanks you gr5. I will try different Initial Layer Height values. Hi Dim3nsioneer, the material is PLA.
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