3D Print - Stop Dragging my .stl around

[charles meyer]

My talented listmates,

I'm bewildered trying to print a small fish on the MK4 on a Smooth PEI sheet.

Does anyone print with this printer and or/or bed sheet?

Others have no problem printing this .stl file I found on one of the freebie sites.

It's Sunlu PLA yellow I just got.

Others have used other PLA.

It prints 51% and then the toolhead starts dragging the print all over the bed.

I have the 1st layer bed temp @ 70 degrees (tried it 1st at 60 degrees)

I've slowed the print down to 15mm on the 1st layer.

Extrusion width 1st layer 0.6mm

1st layer height 0.3mm

Print support Everywhere.

I cleaned the bed with Dawn and dried it with a microfiber towel.

The printer jsu printed an 8 hr print with no problems.

What, if anything, am I missing on this?

Thank you,

Charles.

[Chris Meyer]

Some thoughts:

Have you tried adding a brim?  https://help.prusa3d.com/article/skirt-and-brim_133969

Is your microfiber towel contaminated with oil?  I'd suggest using hot water+dawn and air drying rather than reusing a towel as you might be getting oils back onto the plate after cleaning

Print in a different location on the bed, if you're in the middle print near and edge, near an edge print near the middle - pick a spot you rarely use

Reslice the file at a different layer thickness.  Sometimes the nozzle will catch on a feature and tear the print off consistently (which is how it ends up getting pulled around on the head eventually).  If you're getting failures always at the same height this is worth trying.

Chris

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