Re: Nozzle bumping against infill
I had a similar problem.
But only when i use the rectilinear infill.
Switched to honeycomb and everything is perfekt.
May be someone can explain me how the nozzle would not hit the infill when it crosses an infill line in the same height.......?
This will always generate a rattling noise.
Please explain it to me when i´m wrong.
Wer freundlich fragt bekommt auch eine freundliche Antwort.
nec aspera terrent
Re: Nozzle bumping against infill
Rectilinear does not cross infill on a given layer. The pattern is to go one direction on a given layer, then print lines 90 degrees to that on the next layer. Kinda lke this:
Layer x: / / / / /
Layer x+1: \ \ \ \ \
Layer x+2: / / / / /
Re: Nozzle bumping against infill
I have this same problem. Don't use the grid infill pattern. Use honecomb or some other pattern that doesn't intersect on the same layer. I don't have a good way to describe it in text, but I can make a video explaining what exactly causes the nozzle to scrape the infill. It's nothing wrong with your printer. Just the Slic3r' grid infill pattern.
Re: Nozzle bumping against infill
Rectilinear does not cross infill on a given layer. The pattern is to go one direction on a given layer, then print lines 90 degrees to that on the next layer. Kinda lke this:
Layer x: / / / / /
Layer x+1: \ \ \ \ \
Layer x+2: / / / / /
Hi Reid.b,
you are right.
It´s the grid infill that generates a crossing on the same layer.
Wer freundlich fragt bekommt auch eine freundliche Antwort.
nec aspera terrent
Re: Nozzle bumping against infill
I know this is old but thought I'd share my frustrations with this exact issue. Brand new printer, bought assembled, arrived 2 weeks ago. Started printing with 3d solutech green PLA using grid infill, resulted in ZERO issues. Moved over and started using a brand new roll of Prusament silver PLA and instantly the nozzle started bumping into the infill. Made a bunch of adjustments and nothing helps until I lowered the speed to 30%! 😮 This turned an 11 hour print into a 28+ hour print. Definitely not awesome. So, maybe it has something to do with the filament? I'm going to try to switch back to the 3d solutech and print the same thing to see if the issue is present. Is anyone still having this issue? So weird that it was not present with one filament and not the other...
Re: Nozzle bumping against infill
Different filaments will have different temperature and other characteristics, so it's entirely possible that moving at one specific rate while extruding a certain amount of filament might perform differently. If the material isn't soft or flowing enough, it might pile on top of the underlying layer instead of melting around it.
[...] So, maybe it has something to do with the filament? I'm going to try to switch back to the 3d solutech and print the same thing to see if the issue is present.
The good news is that you don't have to slow down your entire print. Just slow down your infill speeds in whatever slicer you're using. The Prusa-supplied defaults of 200mm/s can be overly-aggressive for a lot of situations.
Re: Nozzle bumping against infill
alternatively, try a different infill pattern
regards 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
Re: Nozzle bumping against infill
Different filaments will have different temperature and other characteristics, so it's entirely possible that moving at one specific rate while extruding a certain amount of filament might perform differently. If the material isn't soft or flowing enough, it might pile on top of the underlying layer instead of melting around it.
[...] So, maybe it has something to do with the filament? I'm going to try to switch back to the 3d solutech and print the same thing to see if the issue is present.
The good news is that you don't have to slow down your entire print. Just slow down your infill speeds in whatever slicer you're using. The Prusa-supplied defaults of 200mm/s can be overly-aggressive for a lot of situations.
I'm just going to use a different infill. Thanks for the info! Just strange that it wasn't doing it with the other filament but with the "better" prusament. I thought it was something loose because it makes sense that it would make the extruder flex from the fast movement. I noticed that one of the Y axis (non motor side) pulley holders was extremely loose and about to fall off. I tightened it but still have the same issue. I'm sure this isn't the reason for the extruder tip bumping the infill but, should I re-calibrate or anything?
Re: Nozzle bumping against infill
I haven't tried Prusament yet, but some of the better filaments tend to be more sensitive to speeds. They give a great printed product, but you can't get it at 200mm/s.
[...] Just strange that it wasn't doing it with the other filament but with the "better" prusament.
I had a print going the other night that ran into the "washboard" problem doing infill. I dialed speeds back and it was fine. It may be something you tweak a bit. Keep in mind, this may be indicative of speed or temp concerns with a particular filament in general, not just specific to infill.
I thought it was something loose because it makes sense that it would make the extruder flex from the fast movement. I noticed that one of the Y axis (non motor side) pulley holders was extremely loose and about to fall off. I tightened it but still have the same issue. I'm sure this isn't the reason for the extruder tip bumping the infill but, should I re-calibrate or anything?
[/quote]I'd suggest starting a new thread to ask on that issue. It's not something I'm familiar with, but it does sound like something of concern.
Re: Nozzle bumping against infill
Hi there!
I had the same issue, my nozzle would dig into the rectangular infill with bigger prints (did not happen on smaller ones). The nozzle would literally rattle over the infill, ripping out parts along the way...
I don't know how many times I tried to adjust the pinda height and did the xzy calibration (my z level is on -1.250) as I thought it had to be below above -1mm. and probably was the issue.
However, https://shop.prusa3d.com/forum/memberlist.php?mode=viewprofile&u=85468 told me that the instructions had been updated and this was not an issue...
Then I came over the post which says Prusa support considers this a bug (which has not yet been fixed), so I tried messing with the flow rate.
What I found as a short term remedy was to lower the flow rate (around 20%), which of course caused the prints go wrong in other ways (outer walls became too thin).
PERMANENT SOLUTION:
thiago.c's 9 squares!!
Printing smaller objects, always in the center of the bed did not make it obvious to me, but my bed was way distorted! Out of the 9 squares only the center one printed correctly, the rest was a mess. When I assembled the printer I did tighten the 9 screws in the order instructed, but way too much.
Printing the 9 squares will help you to understand whats going on.
I did loosen all 9 screws, then tightened them very gently by twisting the allen key between my fingers (in the order instructed in the manual). In the second go I tightened them a slight bit more. Then print the squares again (the 2nd print was already way better) and adjust accordingly, print again aso.
The result for me was amazing, not a single sign of scratching (20cm diameter rectangular infill)!
So, cheers to you Thiago, may you live forever man! 😀