rounded and mis-shaped prints - how to troubleshoot?
MK4
Prusaslicer 2.9.4
PLA - (Overture, elegoo, hatchbox)
See below for pictures showing the problem and a screenshot in the slicer of what it should look like. It would not allow me to attach the gcode for some reason. I am using basically the prusa defaults for settings as I always have. I'm not sure what changed to cause these terrible layers and mis-shaped corners. I have no idea where to start to troubleshoot this problem or what it is called. Please assist. Thank you!
Please save your project as a .3mf file
Files > Save Project as
Zip the .3mf and post it here. It will contain both your part and your settings for us to diagnose.
Cheerio,
RE: rounded and mis-shaped prints - how to troubleshoot?
Zipped and attached as requested. Thanks for the assistance!
RE:
My guess is that for that model with those small T shaped tabs on the periphery, you’re printing too fast and the nozzle temp. is a bit high. ( I assume that your fan is working OK ).
If you don’t like to modify preset profiles use structural instead of speed, and 0.2mm layer height instead of 0.15, because this model doesn’t benefits from a 0.15mm layer as there’re no overhangs. Besides, don’t set a nozzle temp. higher than 210C, unless you’re using a hardened steel nozzle.
In short : I’d try the 0.2mm structural profile instead of 0.15mm speed.
RE: rounded and mis-shaped prints - how to troubleshoot?
Based on the suggestions above, I tried a new print using .2mm layers (structural) and lowered the nozzle temp to 210 and 205 degrees. As you can see in the picture, its a little bit better but still not great. I also zipped and attached the 3mf.
I should also add that I have printed these plenty before with great success.....but I think they were all on the MK3S+ I used to have.
If this is a speed issue, what easy to use and adjust speed test prints do you all recommend?
@artur5 is broadly correct. This part pushes the accuracy limits to the edge. As much of the problem is corner rounding, drastically reducing the print speed should help and using the new 2.9.3 slicer which partially addresses this would also be a good idea.
Cheerio,
RE: rounded and mis-shaped prints - how to troubleshoot?
To update everyone on how I resolved this issue....
BLUF - basic maintenance is key. My Y axis linear bearings were loose and needed realignment and tightening. Also, the Y axis belt was extremely loose.
Full Story....
After decreasing print speeds to 15mm/s and still failing, I decided to take a step back and run through all the on board calibration tests. It was then that I discovered a deeper issue. I could not get the XY calibration to pass. The Y axis failed continuously. After taking a closer look I realized the Y Axis motor belt was extremely loose. As I went to manually move the print bed to the rear, I realized that there was a lot of slop and side to side movement. Once I flipped the printer on its side and started checking bolts, I discovered the linear bearings were out of place and were no longer tightened down. I went through all the bolts and realigned everything. Once buttoned up I ran through the XY calibration and it passed. Ran the print again and everything is as it should be.
I appreciate you guys for giving me some troubleshooting tips. Rule #1 though.... is the hardware correct? hahaha. My mistake. Always check the basics first.