Quality problems after upgrading to latest firmware on H2S

Bambu Lab H2 Series
1

I have had this problem before, and ended up downgrading on a previous firmware release. Before anyone asks, I recalibrated and power cycled after upgrading. Filament was dry.

Problem is after upgrading to the latest H2S firmware, first layer quality degraded tremendously. Where before my first layers were fairly smooth, after the upgrade, I am getting ridges, almost like the nozzle is too close. Downgraded to original and ran same file with all same settings, same filament, same build plate and the quality went back to normal.

Any idea what I can do?

Pics for original fw and after upgrade below.

IMG_0542
IMG_05421920Ă—2027 311 KB

IMG_0541
IMG_05411920Ă—1920 259 KB

1 Like
2

this is happening on my P1S, but havent got it on my H2S frustrating as im trying to do some face down prints

3

Have you done a factory reset? Any time you have issues after a firmware update it is the first thing you should do.

Also, how are you cleaning your bed plate? Oily spots on a bed can result in very similar defects.

4

Thanks for the response.

Here is my procedure when I change firmware. It is what I have done on all my printers.

Power cycle printer

Install new FW

Power cycle again

Run full calibration, except for high temp as I don’t do high temp materials very often.

Power cycle again

I use Dawn dishwashing soap to clean plates.

Right now, I am experimenting with using actual Bambu filament rather than the Sunlu I was printing. I wonder if maybe I have a flow problem as I haven’t calibrated this specific filament yet. What concerns me is that, even though my before isn’t perfect, the post upgrade was so much worse.

I will let you know as I experiment.

5

I get this exact same result whenever the plate isn’t clean and sometimes I had to clean it with dish soap more than once. But it exactly looks like this.

6

I haven’t done a factory reset as I am concerned about whether I could revert the firmware back after I do.

I clean bed with Dawn and hot water.

7

A factory reset does not revert the firmware version.

8

I realize that. My concern is that if I factory reset after upgrading firmware, can I still revert to the original firmware or am I stuck on the new?

9

You can still revert.

10

Ok. If I factory restore, that will mean I have to recalculate all my K values for the filaments, right? I have about 15 different filaments I have those set at and really don’t want to have to recalibrate all of them.

11

PA is a property of the filament. It should still be the same after a factory reset.

12

Ok. I think I figured it out. The particular filament I was using was over extruding by quite a bit. It was Sunlu PLA+, which I hadn’t really calibrated yet. I think the FW upgrade just made the printer more sensitive to that over extrusion or something.

Anyway, I had to take the flow ratio all the way from .98 down to .9254. After that, I was getting good first layers.

Way I found it was I used a roll of Bambu PLA basic and set that on printer and in slicer. Test print came out almost perfect, so it told me it was something to do with the filament. I will need to run some more tests with other brands and make sure I have them dialed in correctly.

Thanks for the advice everyone.