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jlegitt73

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  1. It did it on every print. I actually found the solution, however. I posted for advice before taking the entire thing apart for a thorough cleaning, just in case I needed to replace something while it was apart. During disassembly, I noticed a couple of things. 1. The Z rods had a bit of dirty build up in the recesses. Took them to the wire wheel and scrubbed them with alcohol. 2. The top carriage that loosely holds the Z rod in place wasn't centered. It's designed to allow plenty of front to back movement, but not enough left to right movement. With the nozzle close to the bed, I loosened the carriage at the top of the Z rod and allowed it to center itself before re-tightening. Put it all back together and first two prints are now perfect.
  2. I've printed at multiple heights from the bed attempting to solve the problem. All have the same results. This one wasn't actually too close either. It was set with the .2 mm feeler gauge and the first layer was perfect other than a tiny blob where the layer started. What looks like a thin line on the skirt is actually a bit of left over clear filament mixing with the black.
  3. This just started happening a couple days ago. Nothing about the printer has changed intentionally. The same GCODE printed perfectly 20 times before. Now it's over extruding like mad for the first 8 layers, then it prints perfectly fine for the remainder of the print. It does this on every single print now - old GCODE and new. I've seen a dozen posts around the internet with the exact same problem, but nobody seems to be able to offer a solution that works. The printer is essentially useless until I fix this. Possible problems: - The first 8 layers are over extruding, which is causing a build up of plastic that the nozzle starts dragging around with it. The outer layer bulges out frequently to cause the problem shown in the photo. OR - The first 8 layers are not the proper Z height. Layer height is set to .2 mm, but if the Z shift is less than that in those first 8 layers it might just seem like over extrusion. Solutions suggested: - Adjust Z rods and wheels. - - Adjusted everything and it seems fine. - Turn down bed temperature. - - Have tried printing with the bed between room temp and 60c. No change. - Adjust Initial Layer settings in Cura. - - Have tried this with no success. Reducing Initial Layer Width, Speed and Fan have only changed the problem. - Something wrong with Z Screws in that range. - - Have raised the bed about 5mm. If the Z Screws were faulty in that area, it should have fixed the problem. It still does it for 8 layers. I think that about covers it. Anyone have any insights?
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