I made my first benchy today! Would you please rate it 1-10? I’m just curious as to how everyone else thinks it looks. I think it came out pretty well except it has a few zits on it. Anyone know why that happens? I was reading online and some people were saying that too much retraction distance can cause that issue. It’s currently set to 4mm and I’m using a bowden style extruder. Is that too much? aside from that it looks pretty nice and it’s super strong at 20% infill. It took 1 hour and 8 minutes to finish.
Nice! It looks good! There is no hard “right” amount of retract distance, and 4mm on a long Bowden tubr may not be enough while on a direct extruder it could me too much!
I’ll agree with your 7 because you are the final judge of how satisfied you are with the print. What features (if any) aside from the zits make you give it a 7? Looks like it was printed with a 0.2mm or 0.25mm layer height. Looks good for that resolution.
Not sure of the proper retraction distance for a Bowden style. I have seen some other printers with that style of drive have retractions of 6-8mm. Not sure what interplay the diameter of the filament might have in that respect. Try a few setting variations and watch the results.
You have to calibrate your own setup as many things like the tube inner diameter, length, any play in the tube, and the actual diameter of the filament. To calibrate this print two towers at the edges of your bed. You want as low a retraction setting as possible as it will be faster and will prevent jamming. So simply increase it for every print till the hairs between the towers disappear! Good luck!
I’m not the best at rating prints, as I haven’t had to troubleshoot my printer all that much yet, but I do know the bubbles are most likely not a retraction issue, but more likely the filament having too much moisture. This causes the water to boil, which leaves bubbles randomly in the print
@Joakim_Innvaer I know what you’re talking about and it’s not that. I’ve seen boiling filament before. Plus this roll is brand new and was sealed very tight. I’m pretty sure it’s some kind of setting or something where it’s just putting out a little too much plastic. I just haven’t figured out what setting it is yet.
@Jeff_Parish it’s a .4mm nozzel at .2mm layer height. Aside from the zits there are just a few imperfections that other people don’t have. Some of the layers are just a little bit off. Aside from the zits I’m plenty happy with it. I guess to give it a 10 it would have to be perfect.
depends on printing speed and style of printer too…
i have geeetech delta g2s , and same dots are present if i go beyond certain printing speed…
limitation of 8bit MEGA controller, it just can’t keep up with motion calculations and it “studders”.
coreXY are bit more forgiving but it ultimately hits same wall.
to recap…
if it is on layer change, following stem position (aligned or randomised depending on slicer), then its probably retraction…
if you slow print down below 30mm/s and it no longer shows (printing off SD, to eliminate USB transfer errors), then its probably overwhelming motion controller…
with my current FW setting (220 segments/s)i can hit calculations limit as low as 45mm/s…
@Marko_Novak that could be… I’m using an Anet E10 so it’s not something I would call high end. Looking at the print, the zits are located where the printer is curving or printing a bunch of small stuff so you may be right. If that’s the case, how do you fix it? Just replace the board? I can slow the printer down but I don’t want prints to take forever…
since e10 is based on classic cartesian geometry, there’s no recalculation of motion… meaning you should not be pushing controller to it’s limits.
but to be sure, you could lower value of calculations/s in FW to see if it has any impact.
but my next best guess would be mechanical motion…
kinks on alu extrusions, tension of belts, tiny slop somewhere…
specially since you mentioned it’s most significant on constant direction changes.
does same thing happen if you print on different parts of the bed, or just in one corner?
