5.5 brim lay-down is odd to me

[Pridanc 2]

Folks, I just jumped over to 5.5 and my prints are good as they were before but thought I'd mention something here.  

I'd just finished printing a part in 5.4 that was "perfect" , installed 5.5 and it too was perfect but I noticed something strange.

 

The Brim began printing on the left side, OK not terribly strange but the norm for me is typically from the "front of build plate" and then the nozzle moving counter clockwise around the plate.    Where it started is not what I found odd. The odd part was that the print laid down several lines of the brim on the left side only before adding any more anywhere else. But even after doing a full circumferential lap or two, the nozzle would suddenly add more yet to the left side and then carry on around the print.

 

The norm, if such a word can be used, has always been front left corner traveling counter clockwise as it laid the filament down almost until it was done.  None of this affected the print, just different and felt I should mention it to learn.

 

Now, after you take a  look at the included .3mf  and y'all say what you see is as it has always been then dang, proof positive that I am ageing rapidly.

 

That's it. Keep up the good work and let me know your thoughts.

 

Oh, I did notice it organizes items on the plate better IMO.

 

All the best, PC

   Ender 3 v2 now direct drive using existing bits.  And yes, I've been using this setup for a while and am happy as a lark.

   PLA

5x2x.5 high no lip Std Q Grid.3mf

Edited October 14, 2023 by Pridanc

[Slashee_the_Cow 271]

Well, I'm not saying you're a crazy old coot, but I just loaded it in 5.5 beta 1, 5.4 and 5.3.1 and (in the simulation animation, at least), they all printed the brim the way you're describing the new behaviour - left first.

 

BUT - I think I have an explanation.

I noticed you're getting so close to the edge of the build area that some of the brim just isn't being printed. I tested by both shrinking the object and (after bringing it back up to normal size) decreasing the brim (in this test to 5mm) so that it all fit in the build area. In both of of these situations the brim printed the way you'd normally expect - starts in the corner and does laps around the whole thing.

 

My guess is that because it can't do whole laps (because that would leave the build area) it's going back and forth up the left side as far as it can - to both edges of the build area - until it reaches the point where it's close enough in that it can do completely laps. It then prints the same amount on the right side (to even it up) and can now do normal laps since its path does not leave the build plate.

[Pridanc 2]

Slash, 

TYVM and I'm betting you are 100% correct.  And I wear the "crazy old coot" as a badge of honor.

Lets call this solved...

Stay well,

PC