I managed to print two separate prints and combine them. The image with green tint background is one array of 81 squares, and the image with the black background is during the insertion of the grid piece (over the print bed, over the 81 squares).
The image with the white background is also both prints 'sandwiched' together, the finished product, on a sheet of paper.
I ultimately failed to print both simultaneously because the bottoms stuck together. This is a problem I can work on, probably, if desired.
Then, I wanted to print an additional file, the grid in white (to make the images of the two separate prints more distinguishable), but I clogged the printer after changing filaments from black to white, I presume. The print was terrible. I will have to examine this and try other prints over the next couple days.
Also, I will start another discussion over on the klipper community page using the same title. I have to go over there and ask questions about pressure advance, corner velocity, and the usual acceleration/deacceleration settings.
And I am definitely planning to try some of your suggestions, which may be better and simpler solutions!
I will try to do all of this simultaneously over the next couple of weeks. 😹
I made a lot of progress over the last few weeks. Thank you so much Slashee !!
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Slashee_the_Cow 319
Always nice to have a happy customer!
The first thing that comes to mind when I see those photos is: what do you have your jerk set to?
(It might be what the "corner velocity" is in the firmware, I don't know Klipper... in that case I would know what it is)
Remember that the nozzle generally isn't dropping filament straight down on the bed, it tends to create a bead on the end of the nozzle which leaves a trail behind it. Jerk affects how much it can change speed instantly at a corner, so if it's too high the trail will just change heading to follow the nozzle at a bit of a diagonal to reach the new line it's printing instead of reaching the corner fully.
(Also if it's too high it can make the printer vibrate whenever it rounds a corner which could make a model wobble out of alignment or if your printer isn't tuned correctly, possibly make it slip a step or two on the motor and give you some layer shift.)
The traditional downside with having really low jerk (other than the increase in print time) is that it has the potential to cause overextrusion because of how much time the nozzle spends at the corner slowing down and then speeding up again, leaving a blob, but if you have linear advance set up then hopefully it's controlling the flow well enough to prevent that.
This is actually my last print. It's really hard to see because... well translucent TPU mostly, and then the forum will crush the image quality when I upload it.
I had jerk on that set to 1mm/s. Because it's TPU (squishy and flexible) and very tall and narrow, so did not want anything making it wobble even a little. There are slight blobs on the corners (and there's a whole lot of crap because TPU is annoying as hell to clean up). You can test it that low, of course, obviously TPU behaves pretty differently to PLA or PETG.
(120 Slashee points to whoever can correctly identify specifically what the yellow thing in the top left is. Message me your answers, don't want to send the thread off topic)
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