BlackCloud

Good idea putting it in your UM2 to dry it out. I'll try that if I keep having problems.

Regarding the PVA, as I don't have a humidistat, I can't guarantee that the humidity is lower than 55%. But we store the filament in a plastic bag with desiccant. We have cleaned the nozzle several times. But I will try hot and cold pulls again. About the z-axis fail, the nozzle collided with the previous layer. almost as if it didn't lower the bed properly when it went to the next layer. The filament continued extruding and ended up wrapped around the nozzle all the way up to the O-ring. Not pretty.

Bought this printer a few months back and had some relatively successful prints. Now everything has gone South. We have not had a successful print with PVA in a dozen tries. Basically, the PVA supports stop printing partway through the model. We've tried tweaking the material settings to no avail and are out of ideas. After multiple fails we finally ended up getting this error message: "PrintCore in slot 1-2 is taking too long to warm up". We're wondering if the print core is FUBAR and the previous fails were its death throes. And now we are having a z-axis failure part way through a print and have no clue on how to trouble shoot it. We had a print get through to about 90% finished and then the nozzles started colliding with the part. Filament got up into the print head and it was a real mess. We couldn't print anything else until we took the cores out and scraped all the melted filament off. This was a two color PLA print, so it was switching between heads on each layer but we've never had problems before. Not sure if it is the issue, but it seems like these problems started after updating to the latest firmware. We could really use some tips on troubleshooting this. Right now we have a very expensive paperweight.

OK. Not a big problem since I can set up a new profile. It might explain why some of y prints have such egregious threading issues. It would be helpful to know what the default values should be so I don't have to try 10 prints to get it right.

Not sure what you mean. I only have one printer to connect to. As for restarting Cura, this issue is with the default settings of the materials. It always shows NaN. [/media]

Version 2.4.0 I can duplicate and edit the profile but I would like to know what the default value is so I have a good starting point. And I think that NaN is not a good default value anyway. It's not a best practice in software development to leave something like that improperly initialized.

Ultimaker 3 I have some threading problems I'm trying to fix so I am looking at the retraction settings. Both the speed and distance default retraction settings for all the material profiles shipped with our printer is NaN. Not a Number usually means division by zero or some other numerical problem. What is it supposed to be and is there any way to change it without having to copy the settings into another profile? The edit option is not enabled for any of the profiles shipped.

Ultimaker 3. When the print head extrudes it's little bit of material to prime the nozzle, on the second nozzle about half the time it extrudes, moves a little bit, then moves back over the material and descends into the little pile, picking it up and smearing it across the build plate and print. Is there anyway to modify the way the priming works so this doesn't happen>

I did merge the models. It does seem that it may have been the flat bottom issue pointed out by DaHai8. I reviewed the models and could not find any problems, but that doesn't mean there wasn't a tiny protrusion somewhere. So I redid the model very carefully making sure I kept everything aligned perfectly. But I ran into another problem because the two parts of the model wouldn't merge. I suspected it might be that the models conflicted in some way so I redid the models a third time and scaled each square to .99 cm instead of 1.0 but centered each square as if it was 1.0. Then it merged and I was able to print it. This raises a question about merging models in general. Does Cura have a way of clipping models that overlap after merging? Complex models are almost sure to have those types of tiny imperfections.

Hello? Is this thing on? Some more testing. Thinking the problem could be one of the STL files I tried several combinations and all of them still showed the same problem. I can load one STL twice, turn one 90 degrees to fill the chess board pattern and it still draws the skirt as if the second model isn't there. I can set both models to the second extruder and it still does it. Set both models to the first extruder, same thing. I'd upload the STLs for someone to try but I don't see a file attachment feature.

New to 3D printing so maybe it's a simple issue. I made a 2 part model (light squares and dark squares) in Blender for a chess board. After exporting each as STL files, importing, assigning extruder 1 and extruder 2, respectively, all looks fine. But when I go to print it, it draws a skirt around the model that is assigned to extruder 1, but invades the space of the second part of the model (see screen shot 1). If I select build plate adhesion, the brim is created around the first part of the model as if the second part doesn't exist (screen shot 2). If I print it, it appears that it is completely ignoring the first layer of the second part that is assigned to extruder 2. Screen shot 3 is layer 1 of the model with the second extruder selected. You can see that it shows the brim and nothing where the second set of squares should be. So what am I doing wrong? Screenshot 1 Screenshot 2 Screenshot 3