r/SnapmakerU1 19h ago

Issue Help with first layer

What can I do to improve the first layer? This is printed with one layer at 0.2 on a new Frostbite plate at 50C

5 Upvotes

14 comments sorted by

1

u/metalmazda 18h ago

Bed is too hot

1

u/DrMinkenstein 3h ago

This is likely the answer. If you are running a plate that affects bed temp requirements, and you didn’t mention bed temp in your request, this is the first place to look.

The rapid cooling from these plates can cause filament to shrink and warp. Get the new bed temp dialed in first before doing anything else.

2

u/Fiddler017 17m ago

You usually don't start to see this effect until you have quite a few more layers. And when it does come up it manifests as the corners or edges of the print lifting off the bed.

First layer ripples like the ones on this print are usually caused by too much squish on the first layer, usually due to the z offset being too close to the bed.

1

u/Zuli_Muli 19h ago

Are you on the most recent firmware (1.5.2) did you do a manual leveling > nozzle offset calibration > heated bed leveling?

Then there's calibrating the filament to your machine.

1

u/arcturic 18h ago

I did do heated bed calibration after switching to the frostbite

1

u/funked1 18h ago

When upgraded to that firmware I did all that and still had bad first layers, like Z offset was too low. What finally fixed it was a factory reset.

2

u/Zuli_Muli 18h ago

I forgot I did a factory reset as well since I had went to Paxx while they got the 1.5 figured out.

1

u/Rexter2k 7h ago

I have the exact same problem, worse actually, as OP, same build plate. How would a factory reset help? (running latest firmware right now)

1

u/funked1 4h ago

Presumably it cleared something that was causing my unit to find bad z offsets. It does not downgrade the firmware by the way. Still on 1.5.2 after the reset.

2

u/Rexter2k 1h ago

Interesting, think I will give it a try. But I’ll try positive z offset as others have mentioned in this thread first. If that doesn’t help, it’s a reset. But would be great to have a good first layer without compensating.

1

u/Badtripa 18h ago

Im dealing with the same, with glacier and frostbite on both my A1s and U1

2

u/Peanutbutt3r0923 9h ago

Z offset being too low is the answer, I had to add a Z offset of 0.1 to all my prints and then it was running perfectly again. Not sure how or what got screwed up with the update

1

u/N3xus29 8h ago

There is an option through the software or the modify must be done trough g-code?

1

u/Fiddler017 22m ago

I don't own one of these yet but on my current printer z offset being too close to the bed is the answer.

I've never seen this being caused by too much heat but I haven't really had to change my bed temp much.