Top Layer Issues  

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dan.p14
(@dan-p14)
Active Member

Hello All! I am new to this. I think I have everything dialed in pretty tight as far as calibration. The only big issue that I cannot figure out is the top layer. I am including a picture of the whistle that was included on the SD card. I printed it straight from the card using the silver PLA that was supplied. Any suggestions would be greatly appreciated.

Posted : 10/11/2018 2:52 am
peter.m26
(@peter-m26)
Honorable Member

Give more info if you want help!

Did you change setting in your slicer?

extrusion multiplier?

Looks like your print top layer is to high?
Try printing with the extrusion multiplier lower.

Or try extrusion multiplier higher because the top lines are open.
But yours are also to high?

Search for websites with fail prints, and pictures, then you see examples.
Also search for how to calibrate the prusa, but I think the prusa should almost be good, if you use the slicr3 for the prusa.

Posted : 10/11/2018 1:21 pm
joan.t
(@joantabb)
Veteran Member Moderator

These may help

https://www.simplify3d.com/support/print-quality-troubleshooting/

https://rigid.ink/pages/ultimate-troubleshooting-guide

Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 10/11/2018 1:32 pm
neil.k2
(@neil-k2)
Estimable Member

Leave the extrusion multiplier alone as this has global impact on your prints. Your Z height is too high - you get away with the bottom layer because of the additional extrusion on that layer particularly if you use slic3r, but your bottom layer should be better than that shown in your picture.

Posted : 10/11/2018 1:42 pm
dan.p14
(@dan-p14)
Active Member

Thanks! It was straight from the SD card sent from Prusa. I was under the assumption that their designs would be sliced appropriately for the printer they were sending it with. I lowered the Z axis a bit and my print was better on top but seemed very thin on the bottom and "pulled up" in spots where it seemed like it got caught on the nozzle movement. I will keep adjusting the Z. Is there a print anyone recommends that makes it easier to adjust the Z? The first layer calibration is very quick and has a short window to make the adjustments when you can see.

Posted : 10/11/2018 3:09 pm
neil.k2
(@neil-k2)
Estimable Member

I started doing the Z height this way

https://shop.prusa3d.com/forum/assembly-and-first-prints-troubleshooting-f62/life-adjust-z-my-way-t2981.html#p115399

You can get pretty complex doing Z height if you want to doing things such as preheat and testing Z height at different places on the bed but the link above is a good start, it is a million times better than the mechanism built into the printer.

Posted : 10/11/2018 7:04 pm
randolph.l
(@randolph-l)
Honorable Member

this is the JP whistle printed directly fro the provided gcode file in the prusa provided SD card

Posted : 10/11/2018 7:06 pm
randolph.l
(@randolph-l)
Honorable Member

drat the forum is not letting me put the top view but it too is perfect not sure what is going on but the forum software keeps logging me out if I select some sections in this MK3 area

Posted : 10/11/2018 7:10 pm
dan.p14
(@dan-p14)
Active Member

Thank you for the pictures and for the Z-Calibration link. I am definitely going to try the attached file and changing the settings as it prints. I think this is my biggest issue at this point. I printed the tree frog and it came out really nice. It is mainly the top layer if it is flat.

Posted : 12/11/2018 5:27 am
toaf
 toaf
(@toaf)
Noble Member

maybe double check your tension on the extruder idler. maybe

I have a Prusa,therefore I research....
Posted : 12/11/2018 6:36 am
dan.p14
(@dan-p14)
Active Member

I figured out my issue (thank you to all - toaf nailed it). The Z calibration was not the full issue (however, I did dial it in a lot better using the supplied link). My issue ended up being my idle door screws. I figured this out by ramping up the speed after I figured out my Z calibration. I found that 500% was the make or break. Once the speed was quicker, the filament was breaking up, thin and unsteady. I determined that the extruder was not getting enough grip on the filament and ended up under supplying the quick passes. I tightened it up one turn and tested until I was able to cleanly run 500%. I pushed up to %600 and it was still strong. My next print was much improved. Now I have to figure out what the cause of the slight layer shift. 🙄

Posted : 13/11/2018 4:25 am
Texy
 texy
(@texy)
Reputable Member

How did you ramp up the speed - via the front panel knob?
Texy

Posted : 14/11/2018 1:18 pm
dan.p14
(@dan-p14)
Active Member


How did you ramp up the speed - via the front panel knob?
Texy

Yes, you can use the front knob or choose "tune print" (I am away from my printer but I am pretty sure that is what it is called).

Side note - My layer alignment issues were solved by loosening the tension on my Y Belt. The prints are now fantastic.

Posted : 14/11/2018 4:13 pm
Texy
 texy
(@texy)
Reputable Member

OK. do you know what your before and after Belt Status figures were?
Texy

Posted : 14/11/2018 7:41 pm
dan.p14
(@dan-p14)
Active Member


OK. do you know what your before and after Belt Status figures were?
Texy

I do not. I did it based on tension and trial and error. Sorry.

Posted : 14/11/2018 8:13 pm
Texy
 texy
(@texy)
Reputable Member

FYI, you can establish what the belt status figures are now via the Support menu of the front panel, Prusa recommend a value of 240 +/-40 - the higher the number, the looser the belt.
Texy

Posted : 15/11/2018 12:30 pm
dan.p14
(@dan-p14)
Active Member


FYI, you can establish what the belt status figures are now via the Support menu of the front panel, Prusa recommend a value of 240 +/-40 - the higher the number, the looser the belt.
Texy

Thanks for sharing! I will have to check that out.

Posted : 15/11/2018 2:43 pm
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