Has anyone solved an issue where the P1S fails Z homing repeatedly fails and says that the build plate is not properly placed when the build plate is placed just fine?
The printer will not get past the Z homing part of a print job nor will it successfully home the Z axis normally from the printer screen. I’ve tried multiple Bambu buildplates and am pretty sure that I put the buildplate on correctly (I’ve been printing for 2 months without issues before this). I also checked above and below the 3 Z axis screws and rods and they move without seizing or extra noise. There isn’t anything physically stopping the bed from moving up and down and the printer screen lets me move the bed little by little to it’s limits when it says that it needs homing. Rebooted, updated firmware, self test/calibration passes but no luck. I opened a support ticket with Bambu but they haven’t responded yet.
Any tips on what else to check? Thanks.
P.S. If @BambuLab logs weren’t encrypted it might help users self diagnose errors in more detail and not wait for a support ticket.
Thanks for the linked post. However my problem lay with the heated bed and Bambu support sent me a replacement heated bed that seems to have fixed the problem.
As for replacing the heated bed, it was a 2/10 and I would not want to do it again. The right panel of the printer is near impossible to remove due to the screws holding it being located in inaccessible locations and the rear chamber fan screws also being near impossible to reach. I think the Bambu support directions are out of date compared to the current shipping model. While it was nice that the P1S is not glued together (outside the connectors) and has screws holding everything in place, getting to all the screws requires massive disassembly so I would’ve paid a local shop to do the replacement for me if such a service existed. It took me about 4 hours total over 2 days to complete.
An example of the inaccessible screw placements is below:
The instructions say the chamber fan can be removed to access the screw in the far back holding in the right panel but the chamber fan and funnel screws are blocked by the metal skeleton.
The right panel front pillar screws are blocked by a metal piece on the version of the P1S I have so I could only pry back the rear side of the right panel and poke around blindly to unscrew and rescrew the heated bed ground cable to the metal body. This ground cable should be connected in a more user accessible hole in the metal skeleton.
Bambu warranty is only 30 days so they are not obligated to replace it after that. The replacement heated bed was recommended by Bambu support so I had planned to slog it out and see if it worked and seek a replacement otherwise.
The P1S shouldn’t be disabled from what seems like a simple heated bed homing failure after just 2 months out of the box! I have 2 P1S so I hope the second one does not suffer the same fate.
Thanks for posting the follow up and I am glad you found a remedy.
Looking at your photos I can see why you struggled.
What follows is for anyone else who finds themselves in a similar situation.
An open dirty little secret about servicing devices like the Bambu Lab printers. One has to have a “factory mindset”. What do I mean by that? Do you think the factory would have attempted any rework of this nature with the enclosure on? The answer is no. So you would have been better served following the procedures associated with the P1P to P1S upgrade in reverse and removing the skins. One the frame is exposed, then you’ll see what the factory work sees. The screws are all more accessible.
I skimmed the video and it seems like the P1P upgrade have different screw placements than the shipped P1S. The chamber fan funnel on the P1S has an extra screw on the left side of the funnel that is not so easy to reach. The video also doesn’t show the screwing of the front pillar screws going forward/backward so I’m not sure if the P1P upgrade just neglects those attachment points
Well when I did my P1P upgrade, I had already used a number of printable skins first that mimicked the Bambu kit. Why? Because as per usual, Bambu was stocked out of the skins for nearly six months after they released them. So you could say that I had extensive experience with this case and have taken it apart and reassembled it multiple times. Trust me, the frames are identical between the P1P, P1S and yes, even the X1C. It should be noted that the P1P was a rush to market stripped down version of the X1C. It wasn’t even supposed to be released but Bambu’s method is “Chabuduo” (差不多).
Now why can I say that about the X1C and P1P being the same chassis? Because I ordered the glass door for the X1C and it fit. Bambu warned me that it wasn’t designed for that. Then guess what? four weeks later they offered the P1S and the upgrade kit and screwed me. I asked for only the differences and they offered me a bogus deal that would have forced me to by the P1S upgrade kit ad a modest discount from the then $150 to $100. That in my view was BS because I already spent $120 and of the kit, I only need the panels which as I stated were stocked out for months. When I say panels, I mean only the rear panel and the front bezel of the P1S. The P1P Bezel was flawed when it was design. Bambu failed to accommodate the door correctly. Here’s the Printables like for the workaround. Again, like I said, I had so many “Yankee Ingenuity” tricks I had to pull off to get my enclosure to obey what should have been a Bambu competed design.Bambu Lab P1P cover for glass door by Exciting7855 | Download free STL model | Printables.com
Here’s another link to the P1P custom skins wiki which does a much better version of the exploded view of the chassis.
In particular, download the PDF with the exploded view. Mind you that one has to understand that their are plate differences between the two units which is what the upgrade kit addresses but the chassis is identical.
Here’s even the link for the STEP file which further shows where all the hidden screw holes are.
If there is one thing I have to hand it to Bambu, very early on, they went out of their way to accommodate the DIYer. We see how long that lasted. As soon as the P1P and later the A1 mini was released, Bambu shut down any new useful data being released. This can only be explained if one understand that the “perceived” original openness of the P1P and the ability to print one’s own enclosure was really a very clever marketing trick to conceal that they didn’t have a complete product. Why can I say this? Because even the upgrade instruction for installing the glass door had these hinky workarounds to get the hinges to slide in. Bambu Specifically stated one had the take a screwdriver and pry back the welded Sheetmetal frame to make enough room to get the hinge to slide in. How’s that for a kluge?
