P1S Print Head Grinding & Bed Dropping – Need Help

I’m having a sporadically recurring issue with my P1S (400 hours of use) where the nozzle drags across the bed, and the print head grinds against the side of the machine.

To diagnose it, I ran several long prints while recording with a GoPro. The main problem is shown in the red duck video, where the printer stops and seems to try to destroy itself. A secondary issue appears in the green duck video, where the bed drops about an inch mid-print.

I have the G-code file from the SD card but can’t open it as plain text.

Has anyone encountered this before or know a fix? I’ve seen SD card issues mentioned often, so my next step is to replace it. Any other suggestions?

Another time that this happened. The bed raised to the top and was grinding against the left side on the machine.

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I don’t know but for starters bowling works with pins, not ducks and well, at least around here use a big ball to hit those pins, not a tiny print head.
Are you sure you are doing it right?

Ok, bad jokes aside…
That indeed looks a bit out of the ordinary.
Your assumption with the SD card making a problem could be correct as I don’t any other option for the g-code ending corrupted like that unless you have sever hardware issues.
Let me guess single parts work fine but multipart prints several MB large tend to do this?

If you want to have a go at the SD card download the default files for your fimware version first.
If you don’t need the pre-sliced models and such just copy the folders of the card somewhere and delete what’s in them.
Leave the verify job file in the root.
Then format the SD using the tool from sdcard.org, quick format will do fine.
If you suspect the SD is damaged you try one of those repair tolls to look for damaged sectors and such but they take like forever to complete.
Once done just copy the folders onto the SD try your luck once more.
Of course if you happen to have a spare SD card somewhere…

Lmao wasn’t planning on bowling. Besides it harpooned the first one.

Haven’t done a whole lot of single part prints so I’m not too sure.

I was just thinking of getting a larger SD card. More space for Timelapse anyway. Manual shows it can use quite a large storage capacity too.

Not sure if it is for you, especially considering the many fakes in online store but there is WiFi enabled SD cards.
Gets rid of the hassles if you want faster transfer speeds for larger video files or don’t want o take the SD out all the time.

I would still check how a single duck works out, maybe slightly larger than than with an entire plate full.
If that fails in a similar way you at least have a reference and if a different SD works fine you know for sure…

I’m getting a new SD card today. I’m planning on continuing printing different color ducks as a stress test. It’s a 6 hour print and uses 63g of filament so if it fails it’s not a huge loss. Plus the ducks are really funny to have.

63g in 6 hours, that must be some sort of record…
I have prints completing in a fraction of that but using a ton of filament.
Maybe I should covert to ducks…

Hello :slight_smile: I bought a new A1 mini a month ago after owning one for a year with no big issues. Out of the box, it also drags the nozzle randomly across the PEI sheet in the startup-sequence. Cant find a way to replicate it.

My new A1 has an AMS. Both machines on same FW.

Can you describe how your P1S is dragging? Is it mid print or during homing / pre-print?

It’s in the video. Mid print it stops to go bowling across the print bed. Hasn’t happened during start up, but it’s also a different machine.

Replaced the SD card today and I’m hoping I won’t have the issue again. But time will tell.

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Ah. Yeah. I see now. Not the same problem then. But hope you have succsess with SD card swap.

Update: replaced micro SD card with a Sandisk 256gb and have not had an issue since. Printed several more colors of ducks as well as a few other projects. Would recommend replacing the SD card as an upgrade whether you’re having issues or not.

Exact card:
SanDisk 256GB Extreme MicroSDXC UHS-I Memory Card - C10, U3, V30, 4K, A2, Micro SD - SDSQXA1-256G-GN6MN

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