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  1. Hello guys! I have had my prusa i3 mk2 for over 2 years now, and it has become an amazing friend of mine. however, recently I discovered some issues when I was trying to print an arch stand for my laptop. (link: https://www.thingiverse.com/thing:265529) . I would really need some suggestions and help... Basically the issue contains two main part: 1. the bed is not level. 2. I can't print the arch. 1. the bed is not level. the machine has passed all the calibrations, but I still find the prints on the right side is slightly more compressed, so I did the mesh bed correction and set it to left50 & right-50 with adjustment on the z, however, it doesn't really help. The skew of the bed is reported as 0.12, so I don't know what is wrong with it...please let me know if this is normal? (though it doesn't cause any first layer issue, but will problems occur at higher levels?) 2. I can't print the arch. so for this print. I had quite a bit of trouble. I was using prusa silver pla filament at 200/40 temps with glue sticks. settings will be shown in the pictures below, and I used cura for all my prints. The first time, the print actually finished, but with very poor quality showing layer separation and poor support contact surface. (the settings are slightly different in infill & support, but no major change)Pics: Then I switched to the settings shown in the above image and hope it could solve the problem, however it did not. Now the print does not even finish. It will stop when approaching the top of the arch with the nozzle clogged, and the layer separation & cracks persist. so below are the all the problems I found: 1. Print stopped midway & nozzle clogged 2. layer separation & crack 3. surface not smooth at the inside 4. bad support contact surface Pics: What I have tried: 1. change extruder temperature between 200 and 210 2. change retraction speed between 0.8 to 3mm 3. change infill density between 35 to 50, pattern from triangle to grid, and overlap percentage from 10% to 20% 4. enable support interface and reduce support overhang angle to 45 degree 5. increase wall line count from 3 to 4, and top thickness to 1mm nothing really helped. Printed three times and they all stopped at roughly the same place. I ordered the hatchbox filament and will try that in a few days, but in the meantime,I wonder if anyone has any thoughts on this? Please help and I really appreciate it!
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