Hi, I’m very happy with this printer, is my first one but I already had some experience with another brand at work.
I’m printing with PLA (velleman) at 190°C. When I print small parts this problem does not appears, or is limited, but when I print big part at one of the corner of my object the extruder seems to deposit more material then needed. Then during printing the extruder collide with the printed PLA, and to avoid damage I usually stop the print. Until now I was not able to print a object larger then 10cm.
Any ideas on what can be caused?
Look at the bottom left part of the picture (I stopped the printer when I saw that)
The other part of the piece is printed correctly, maybe a little bit more material then necessary, but is ok.
My setting is 200° and 75% flow.
The 200° because it sticks better at this temp even if 190 is theoretically enough.
With 90% flow too much filament is extruded. 70-75% is usually enough (vary a bit with the color though).
ok thank you raby, tomorrow i will try to set 200°C and lower the flow rate to 75% (was 90% now)
[quote=“AlmAck”]Hi, I’m very happy with this printer, is my first one but I already had some experience with another brand at work.
I’m printing with PLA (velleman) at 190°C. When I print small parts this problem does not appears, or is limited, but when I print big part at one of the corner of my object the extruder seems to deposit more material then needed. Then during printing the extruder collide with the printed PLA, and to avoid damage I usually stop the print. Until now I was not able to print a object larger then 10cm.
Any ideas on what can be caused?
Look at the bottom left part of the picture (I stopped the printer when I saw that)
The other part of the piece is printed correctly, maybe a little bit more material then necessary, but is ok.
[/quote]
If you take a look at the line that should go on the
outside of the print, you see that it prints past that line. You needed to move the part in repetier software
It’s looks like it’s either missing steps (can you hear it “clicking” sometimes before the fault appears?) or you’ve exceeded the print area. I had a print that looked like that when I tried to print inside the left hand strip that the right hand nozzle can’t reach. It also slightly exceeded the brim (or whatever that external line is called!).
It’s called the skirt 
Thank your suggestions, I’m printing now with 200° and 75% flow in the middle of the platform. Is really better but still not perfect.
Maybe the first issue was that the piece was printed to near to the print area.
I don’t think that the motor misses some steps, the axes moves quite well without to much force.
Look at this image, seems that in the first layer there is to much material extruded,
You can reduce the flow to 70% but from now on it’s on a try and error basis. The ideal temperature and flow can vary with the filament color and brand, the print speed etc…
white filament tends to flow more than other filaments. If you use other filament is it better?
unfortunately I have only PLA white and ABS black (I still need to try ABS but I would like to make some more practice with PLA)
I saw this topic (viewtopic.php?f=61&t=13483) I would try to reduce the first layer to 0.2mm, and decrease the flow from100% to a lower value.
Seems that my issue is only when printing the first layer, because the rest of the print looks amazing.
@AlmAck: Today I even reduced the flow to 65% for White (in the filament settings) which printed very nice at a temperature of 180C.
I stay at 0.2mm for the first layer as my tests with 0.3-0.5mm didn’t work out (filament got glued way too hard to the BuildTak).
Erik
Hi h60, wow thank you for the suggestions! with 65% flow is printing perfectly now!
I printed at 190°C and the result is excellent. I think 190°C is a good compromize, maybe 5 or 10°C can be ok, but the right temperature for white PLA from velleman is around real 190-200°C (with “real” I mean the temperature of the nozzle misured with a dedicated instrument)