Because it’s me and this is just the sort of thing that happens to me…..
Finished a 4 part print that had a very short priming tower at the back of the build plate. Everything had cooled overnight so it was all mostly loose.
In picking up the 4 items I knocked the tiny purge tower off the back of the plate to where the back Z screw sits. Reaching in with my fingers to try and pick it out of there I managed to knock it forward but , as it appears to be, into the opening of the vent channel under the heat plate. Because of course there is an inaccessible 2-3” hole back there. Not to drop below the plate and to the chamber floor , but to be inside that metal channel that is the bottom of the heat bed assembly.
So is there a minimally invasive way to separate that lower channel from the bottom of the heat bed, without removing the entire heat bed, or without having to tilt the giant heavy printer backwards?
Ticket is in to see what Bambu says.
Here a view of the space I think the 1/2” tall prime tower slid into.
If there is really such a large opening there, I wonder why it’s not covered with a maze like thing.
All kind of debris can gather there and especially PLA could almost melt stuck there when you heat the chamber to 65C and the Build plate to 120C.
I am interested to hear what support comes up with.
Indeed. As I’m apparently the type to step on all the rakes , a simple large mesh screen would have been good. At least so something the width of a small prime tower won’t fit. Will see what they say.
You post got me curious so I pulled my pre-H2C upgrade H2D bed and indeed there is a huge cavity there. It is enclosed so whatever gets there won’t go anywhere but it will be hard to get out, a small vaccum cleaner with a flexible attachment is the best I can think of.
Yeah. But with the bed mounted in the printer that’s no option as you have almost no space to work with.
Nice idea though. I did try blowing air in the front vent openings but they route around the sides and by the time air gets to the back it’s coming in from the sides and won’t shift the PLA block.
I’ve got ideas but will wait to see what support comes up with before I go futzing around and hose up the beds alignment.
It’s almost the same when installed, only the 2 screws heads protude from the bracket. They may catch the tower though but compressed air in the cavity should also blow the tower out and whatever debris. FWIW this cavity was really clean for the 840hrs I used this bed until I replace it.
What you see in my picture is how it came out, I didn’t clean it
Well support came back with an approach I don’t have a lot of use for. Seems that support may not have access to the assembly diagrams either , just prepared processes and if the problem is outside of that, they come up with an idea the way you and I would.
> we believe that if you want to retrieve it without disassembling the heatbed, you will need to use a longer pair of clamps or tweezers to reach in and pull it out after removing the back panel from the rear of the printer.
That would request taking the billion of back panel screws out (that are part of the structural integrity) and trying to fish it out.
The solution I ended up trying was what others have tried. Unplug everything (tubes cables etc) and tip the printer backwards to about 45-60 degrees. I heard a clink. Set it upright again and with the help of a flashlight at the back behind the rear Z screw I could see the prime tower stuck behind it.
So next challenge - getting it out from there. That was easier than expected. A Bambu skewer with a big wad of blue tack in it, and it could be probed and pulled out carefully. Like playing “Operation”.
