I occasionally get the poop not going down the shoot and going on top of the bed or below the bed next to the rear Z-axis screw causing an error (and horrible sound) as the bed can’t go all the way down. Has anyone had the problem and found a solution for this?
1 Like
I had this happen one time. I been checking sense for this issue it seems to as I have printed with printer more and more to seem to be more often going down the poop shoot. So I am wonder if maybe a new tool if the filament sticks to it a little more then broken end?
If you just got the printer I would try get 20+ hours in on it and see if it gets a bit better.
I currently have roughly 150+ hours.
I suggest you watch the printer start cycle and make sure the poop and wipe cycle looks like all the parts are working correctly.
I have the same issue on my P1P and it has caused the bed to jam on 2 occasions. Seems the flap in the chute gets stuck sometimes, not sure if removing it altogether would help.
Have you altered the amount of poop that gets extruded? If it’s too small it won’t be heavy enough to drop down the chute like it should.
1 Like
I just had the issue after alot of prints where filament just wanted to after cleaning wanted to stick again to the nozzle. So I did it old school heating the tool to 220c got a paper towel and wiped the nozzle good. Started the print over and filament now falling off easy again off the nozzle. I think over time it just gets residue on nozzle that is making it stick to it to much.
2 Likes
I just had exactly the same thing happen on my P1P too, first time after about 10 hrs of printing. I got an Z axis error message and it took me a little while to figure out what had happened and spot the filament poop down the bottom on the rear z-axis.
Just fyi, my poop amount was set to standard settings, so I dont think its a case of it being too lite.
Will watch future print starts more carefully and see if I can spot why it might happen…
Hello,
same problem here on my new x1c…
Any suggestions to solve this?
I use bambulab pla and standard settings.
Thank you!
Christian
Well… there doesn’t be any activity on this thread and this started happening to me more often than I’d like. I have replaced the roller bar but it didn’t change anything. Randomly during initial purge, the wipe fails to detach the poop and it yanks it out of the shoot and flings it elsewhere.
Did anyone find a remedy to this?
I found this worked pretty good.
4 Likes
Hello, I had exactly the same problems with my new P1S. I was able to solve the problem by customising the Gcode. The filament is extruded into the container at 250 degrees. Then the temperature drops to 220 degrees. The nozzle is then lowered by another 20 degrees and then cleaned at 200 degrees. This temperature seemed too low to me and I only lowered the nozzle by another 5 degrees to 215 degrees for cleaning. Since then, I no longer have any problems. In the Gcode comes relatively at the beginning a place that sits in brackets with the description to lower the nozzle temperature by-20 degrees. Here, change the value behind the minus to -5. This should solve the problem.
1 Like
M109 S250 ;set nozzle to common flush temp
M106 P1 S0
G92 E0
G1 E50 F200
M400
M104 S[nozzle_temperature_initial_layer]
G92 E0
G1 E50 F200
M400
M106 P1 S255
G92 E0
G1 E5 F300
M109 S{nozzle_temperature_initial_layer[initial_extruder]-5} ; drop nozzle temp, make filament shink a bit
G92 E0
G1 E-0.5 F300
In this section is the point where you have to change the temperature. The -5 were default to -20.
3 Likes
I was having this problem so I changed the blade in the filament cutter and have not had the problem since.
@neileast01 I am going to have to try that, because out of the box my new p1s is actually depositing ~80-90% of the poop in the build area or its getting jammed in the chute. If anyone else has ideas, people are still interested in this topic.
The stock nozzzle wipe is not the greatest. A little explainer first. That lever contraption on the back center of the chute is there to facilitate filament to ball up when purging. The toolhead backs against that and causes the flapper in chute to close. Don’t mess with that.
There are several improvements on Printables and probably Maker World that are much better.
I started with this.
Lopped off half the body because I had concerns about the reduced size of the opening. The rubber bristles are from the A1
1 Like
The X1C has a thing on the side of the bed called “calibration board”, which is a sticker with patterns to calibrate the lidar.
The P1S still has the plastic thing to hold the sticker, but it’s blank and unused. It looks like the perfect spot to put a rubber wiper on, no? It could work together with the existing one to clean the nozzle sides after the initial poop, to wipe off the stuff stuck to the nozzle 
It would still need a better wiper, like the one you posted, but it’s a thing I noticed and seeing the rubber thing made me think of it. What do oyu think?
Reason I put it where I did was because the unlocatable G-Code is already in place at the chute to do a pretty thorough nozzle cleaning. If you watch the “clean the nozzle” process from start to finish it is pretty comprehensive. What is bad is how they implemented it with that PTFE tubing rig in the chute. It is trying to put a clean nozzle over build build plate when it exits the cleaning “station”
The nozzle does ooze filament when it parks over the chute during color changes and other program sequence steps. I think that is the source of those short strands of straight filament. The flapper in the chute designed to create the balled up filament you see.
People often will post about hearing a loud bang which is IMO the toolhead smacking that device mounted to back of chute. Almost like
On every 4th positioning of toolhead over chute, smack flapper actuator extra hard
which it executes with an extra fast hit on that hinge assembly.
Just to show what I’m working with, the photo I’m adding is actually the purge tower for a 2 filament item that I pulled from the build plate, threw in my 3d printing waste bin, and then pulled back out for a photo. There was probably about 2-3 times more printer poop attached to the tower originally.
I’m a little concerned because the ratio of poop in the build area vs out of the chute is around 10 to 1 and my primary reason for a purge tower is so that poop doesn’t end up embedded in the side of the printed object.
Oh I agree with you on that (printing a better “scrubber” right now actually lol), I was just suggesting something extra, an addition after that problem is solved.
it should just be a few G0 moves, nothing too hard to figure out. If I ever get the time I’ll try and post on makerworld. The most difficult part will be knowing what coordinates to send the nozzle at, as neither Orca or Bambu Studio tell them to you when manually moving the nozzle 
I think it’s just random chance for the toolhead to smack on the flapper, as the start gcode is always the same. This is the part of the code that does the first “poop”, then shakes a bit and wipes (I think I modified it by adding a few more wipes than normal to be sure)
G1 X54 F12000
G1 Y265
M400
M621 S[initial_extruder]A
M620.1 E F{filament_max_volumetric_speed[initial_extruder]/2.4053*60} T{nozzle_temperature_range_high[initial_extruder]}
M412 S1 ; ===turn on filament runout detection===
M109 S250 ;set nozzle to common flush temp
M106 P1 S0
G92 E0
G1 E50 F200
M400
M104 S[nozzle_temperature_initial_layer]
G92 E0
G1 E50 F200
M400
M106 P1 S255
G92 E0
G1 E5 F300
M109 S{nozzle_temperature_initial_layer[initial_extruder]-20} ; drop nozzle temp, make filament shink a bit
G92 E0
G1 E-0.5 F300
G1 X70 F9000
G1 X76 F15000
G1 X65 F15000
G1 X76 F15000
G1 X65 F15000; shake to put down garbage
G1 X80 F6000
G1 X95 F15000
G1 X80 F15000
G1 X165 F15000; wipe and shake
M400
M106 P1 S0