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First of logo and benchy - sad frog 🙁  

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PrzemoC
(@przemoc)
New Member
First of logo and benchy - sad frog 🙁

Hello, 
I've bought some veeeery long time ago kit for MK3S+ and it was waiting for assembly due to several issues. Nevertheless, I've finally managed to do it, but first prints are not good. Could You please have a look and tell me what I've f***ed up? 🙂

Both objects printed from gcode delivered on SDcard

Thanks in advance!

 

Posted : 19/06/2022 7:51 pm
jsw
 jsw
(@jsw)
Famed Member
RE: First of logo and benchy - sad frog 🙁

It looks like there's some layer inconsistency in there.  The first thing I would do is to check to be sure that the X and Y belts are tightened properly and the grub screws holding the pulleys to the stepper motor shafts are good and tight.  I might extend that suggestion to include a good overall check and inspection to be sure everything is solid and all bolts are tight.

There's also some stringing.  I'm assuming that you are using the silver-gray PLA that comes with the machine, and I know that it is not normally prone to stringing, so it may be damp.  I would suggest drying the filament (electric, not gas oven or air fryer or filament dryer) at about 120F/49C for several hours.

Posted : 19/06/2022 8:33 pm
PrzemoC
(@przemoc)
New Member
Topic starter answered:
RE: First of logo and benchy - sad frog 🙁

Belt tensions fixed, all the screws checked. It looks a little better, but still far from ideal. Any ideas?

 

 

 

Posted : 04/07/2022 10:22 pm
Robin
(@robin)
Reputable Member
RE: First of logo and benchy - sad frog 🙁

I'd recommend you stop printing the benchy gcode from the SD and slice one of those xyz-calibration cubes with default settings in PrusaSlicer. Those print much faster and you can easily tell which axis is having problems. I am with jsw on this one, something is loose on x or y axis. Can you feel a little play when trying to move (wiggle) the extruder and/or the bed by hand with the stepper motors engaged? There should be none. If there is, try to figure out what part is causing this, tighten it.

Also, your first picture of the benchy bottom shows your first layer calibration is not ok, you need to get closer to the bed (more negative z-height). This ist not causing your shift problem but will start to cause adhesion failures very soon...

If at first you don't succeed, skydiving is not for you.

Posted : 07/07/2022 11:57 am
PrzemoC
(@przemoc)
New Member
Topic starter answered:
RE: First of logo and benchy - sad frog 🙁

Posted by: @robin

I'd recommend you stop printing the benchy gcode from the SD and slice one of those xyz-calibration cubes with default settings in PrusaSlicer. Those print much faster and you can easily tell which axis is having problems. I am with jsw on this one, something is loose on x or y axis. Can you feel a little play when trying to move (wiggle) the extruder and/or the bed by hand with the stepper motors engaged? There should be none. If there is, try to figure out what part is causing this, tighten it.

Also, your first picture of the benchy bottom shows your first layer calibration is not ok, you need to get closer to the bed (more negative z-height). This ist not causing your shift problem but will start to cause adhesion failures very soon...

Ok, I've done some printings
Firstly, I've printed tension meter (PETG) and for X and Y axis is showing that is in the upper part.
I printed a whistle (PLA) from SD card - looks good I think.
I've printed one of the bed tests (PETG) - sometimes lines are missing.
Next one was cube (PETG) XYZ and looks so so.
Last is the DEO stand - previous one looks great, this one it's moved during a printing.

Any ideas pls?

Posted : 11/07/2022 1:30 pm
jsw
 jsw
(@jsw)
Famed Member
RE: First of logo and benchy - sad frog 🙁

I think that you are getting close.

The cube does not look bad at all, at least from the photos.  It's difficult for me to tell from the photos regarding the quality of the 3x3 but it does look like you have some layer shift on the X axis, as you do with the DEO print.  With the 3x3 print it looks like it occurred on the first layer.

The next things I would check if this were mine would be to be sure that the grub screw on the X axis pulley is properly seated and tight, and that there are no mechanical issues or items that would block the free travel of the X carriage, which could cause a shift.

Posted : 11/07/2022 2:55 pm
PrzemoC
(@przemoc)
New Member
Topic starter answered:
RE: First of logo and benchy - sad frog 🙁

Thanks - I was just thinking that especially on DEO it looks something has been blocked and belt "jumped" for few rows. I'll start with this one.

What I should print to check if it's ok (besides those that I've done)?

Posted : 11/07/2022 3:01 pm
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