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Y-Axis Issues at first test print  

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Jan
 Jan
(@jan-4)
Active Member
Y-Axis Issues at first test print

Hi,

we just finished our new Mk3S+ and made our first test print.

I haven't found anything like this at least within the last weeks in this forum. Have you any advice, what could trigger for this could be?

Best regards,

Jan

Best Answer by Diem:

Your first layer Z calibration could go a little lower and I suspect there are fingermarks on your build-plate, try cleaning it.

Yes, your Y axis needs checking.  If you are sure you have the belt tight enough -  check the grub screws in the motor pulley are set correctly

Also make sure the cable bundle is not obstructed by anything at the backmost position.

Cheerio,

Posted : 22/05/2022 8:10 am
Jan
 Jan
(@jan-4)
Active Member
Topic starter answered:
RE: Y-Axis Issues at first test print

There should be pictures inline, but I can't see them right now. Does it need some time ?

Posted : 22/05/2022 8:12 am
Jan
 Jan
(@jan-4)
Active Member
Topic starter answered:
RE: Y-Axis Issues at first test print

Posted : 22/05/2022 8:18 am
Jan
 Jan
(@jan-4)
Active Member
Topic starter answered:
RE: Y-Axis Issues at first test print

Since the time for editing is limited here are the comments to the pictures...

Picture 1:

First Layer of the test pattern. The inlay doen't touch the lower edge and exceeds the upper edge. There's also a jump in the y-direction after one centimeter.

Picture 2:

Second layer of the test pattern. Same issues on the second layer.

Picture 3:

Final print in total.

Picture 4:

Even in the outer line there's a gap. It was better seen only in the first layer, but I have no picture from the first layer.

Picture 5:

Huge gap in the lower left corner. The upper slices are above the the lower. It somehow looks like diagonal in y-direction.

Picture 6:

Huge gap in the lower right corner. Similar to the lower left corner but not only limited to the first centimeter.

Picture 7:

Diagonal view. You can also see the displacements in the upper edge.

Picture 8:

Similar view as picture 7. The displacements in y-directions are good to recognice.

Picture 9:

Bottom view. Lower edge is on thr right. Maybe the x-live-adjustment is not proper right now, but I guess this doesn't lead to the y-displacements.

Picture 10:

The infill isn't attached to the edge.

 

Obviously something is wrong with the y-axis. The bend should not be too lose (I guess). We used the Pano tuner, how it was recomended in some comments and tightened the belt to above 100-110Hz (Recommenations were about 90-100Hz). Maybe it was to tight?

Posted : 22/05/2022 8:38 am
Diem
 Diem
(@diem)
Famed Member
RE: Y-Axis Issues at first test print

Your first layer Z calibration could go a little lower and I suspect there are fingermarks on your build-plate, try cleaning it.

Yes, your Y axis needs checking.  If you are sure you have the belt tight enough -  check the grub screws in the motor pulley are set correctly

Also make sure the cable bundle is not obstructed by anything at the backmost position.

Cheerio,

Posted : 22/05/2022 4:14 pm
HXM and Jan liked
Jan
 Jan
(@jan-4)
Active Member
Topic starter answered:
RE: Y-Axis Issues at first test print

Hi Diem,

thank you very much. Your advise helped a lot. We already reduced the z-adjustment for the first layer and tightened they-belt a little more. The z-adjustment made a good impact, the tightening of the belt only a small one.

Cables had enough space to move freely. The big impact came by they-axis grub screws. One of them wasn't tight screwn, so this caused the bad y-positioning.

Here are some new results:

 

The lines are now properly aligned

 

The Prusa logo looks good, no more wholes in the top layer

No more jitter in the y-axis 🙂

Also on the other side no jitter in the y-axis.

Propably there's still more optimazion for the bottom layer, but for my beginner's eyes, it looks good.

 

Also from this view, it looks great to me.

If you have any more optimization, feel free to add it. Right now the benchy is on the printer and looks also great so far.

Best regards,

Jan

Posted : 22/05/2022 5:55 pm
Diem
 Diem
(@diem)
Famed Member

I would rate that print as good enough for the first month.

Every user builds their printer slightly differently and pre-built models are shaken up in transit so during the first few weeks of use the printer will run-in and settle its parts together; then you will have to go over the basic maintenance checks, lubricate and recalibrate. Even if you got everything dialled in perfectly today, it would all need re-doing.

Better to settle, temporarily, for a basic working printer and get some useful printing done, make your early mistakes, establish a routine and generally get used to the process. Then when you do your one month service you can take extra care knowing the new settings on your now stable printer are likely to last for several months.

Cheerio,

Posted : 22/05/2022 6:01 pm
Jan
 Jan
(@jan-4)
Active Member
Topic starter answered:
RE: Y-Axis Issues at first test print

Thank you very much 🙂

Posted : 22/05/2022 6:06 pm
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