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Kibox

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Everything posted by Kibox

  1. I did not know that I could save the project. Thanks for the advice! CFFFP_Test_Underextrusion4 v2.3mf Before I set the print speed equally to 30 mm / s, I did another test and disabled retraction. There the problem still persists: I think my printer might have problems, if the extrusion speed changes too abrubtly. I set all the print speed to 30 mm / s and changed small feature speed to 50 %. Before, Small feature speed had been 10 % and I think that was probably waaay to slow. now it looks like this: Of course, the print is less than good, I think the edges show signs that the fans are not cooling the extruded material quickly enough, but I will adjust the fans later and this is not such a big problem. I find it curious, that there are visible changed in the thickness of the part next to the holes. But so far it looks way better than the first part I posted. I am going to print a bigger model now and see how this turns out with 50 % small feature speed. I will work on the PID tuning later. I am using the newest Cura Version (4.13.1). And because you asked about my printer: It has the electronics of the Geeedtech Prusa I3 Pro W (I guess the cheapest printer there is on the market^^), but I replaced most of the original parts. It has a 2 in 1 bowden extruder and the firmware has been upgraded to the newest available.
  2. Ok this seems to be another problem. I printed a wall that is 0,5 mm and the nozzle size is 0,4 mm. So the extruder printed the first line ~0,4 mm and had to place a second line with 0,1 mm next to it. Therefore it had to adjust the extrusion speed. It seems that some calculations interfere with the small feature setting. So when a small feature is printed, it slows down the movement. When it now calculates the extrusion speed, there seem to be slight differences to the parts that are not small feature. So the problem with this part seems to be unrelated to the wall problem of this topic.
  3. I did some further testing. I also printed a "normal" part without any holes and it looks quite good. So I would assume that the problem is not a mechanical one of my printer, but of the slicer settings. It does not really look like the classical underextrusion, but I am not sure. I allso attached the G-Code of the example bad part, maybe someone would like to test if they observe the same behaviour? Test_Underextrusion4 v2.stl CFFFP_Test_Underextrusion4 v2.gcode
  4. Hi there, I must admit, I am not using an Ultimaker printer, but I built one myself. I am using the wonderful Slicer Cura, which (as I think) is the best one on the market. Overall, my printer prints beautifully, but lately, I discovered a new problem. I had not printed in a long time and I am not sure when this problem first arose. I am printing quite a complex part, about 19 hours to print in total (picture 2). I am using a bowden extruder. Some parts of the model are printed really well and smoothly without any reason for complaints. But some parts (especially the ones with holes in it) are printed with missing material. The wall thickness also seems to differ. I would suppose that it had something to do with retraction, but reducing retract / prime speed did not solve the problem. Also, I do not understand, why this problem occurs only on certain parts of the model. Picture 1 shows another model with a similar issue, but overall much better quality. I tried to reproduce and isolate the problem (picture 3) by printing a very thin wall (0,5 mm). Here it can be seen clearly that somehow some parts of the wall are printed thicker. I am still doing testing, but I feel a little bit lost here. I hope you can help. Details: Material: PLA Print temperature: tried 200 °C, 210 °C, 220 °C Print speed, outer / inner wall speed: 30 mm/s Infill speed, travel speed 40 mm/s Small feature speed: 10 mm/s Small feature max length 20 mm Retract amount 6,5 mm Retract / prime speed 20 mm/s Layer height: 0,2 mm Nozzle diameter 0,4 mm Kind regards René
  5. Ok, nevermind. I found the solution: Seems the object lost adhesion to the build plate imperceptibly. So everytime the print head went over the object, it was pressed down slightly. The new layer, then, was printed in a deviated angle. Increasing the brim width or printing on a raft, solved this problem.
  6. Hello forum, I have the following issue: Cura does not print support for very small edges (edges without any chamfer). I know there is the option "print thin walls", which helped with this issue for small edges on the build plate, however, I did not find this option for support. Currently I have to work around it by designing all objects with chamfers, where support is needed. This is somewhat laborious. Can anyone help? Kind regards, René
  7. Hey guys, first time in this forum. When I started 3D printing many years ago, I bought the cheapest 3D printer I could find (Geeetech Prusa I3 pro W) and started modifying it. Today, it is still the same printer (I use the same electronics and software) but the frame and many other parts of the printer are completely modified. Currently I am studying and do not have the money to buy one of the nice Cura printers. I found Cura to be the best Slicer software for me so far. However, I am experiencing some compatibility issues once in a while. The trickiest one occured recently: When I print e.g. a normal rectangle or a plate in a 45 ° angle, sudden angle shifts occur during printing. This happens sporadicly and seems to be connected to the G-Code: If I save the G-Code that caused a shifted model, this G-Code will always produce a shifted model and vice versa. I found a topic in this forum where a similar issue is adressed: Here the people come to the conclusion, that it must have something to do with acceleration, that the printer tries to accelerate faster than it physically can, and therefore looses coordinates. I do not think this is true for my case. I printed additional parts next to the 45 ° shifted rectangle and those were printed perfectly. I would assume, that if the printer lost coordinates, it would affect other parts on the same build plate as well. I tried activating "acceleration control" and deactivating "relative extrusion" but none helped. I hope there is an option in the slicer settings that solves the problem. Hope you guys can help. Kind regards René
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