Hey folks, new to the 3d printing world, but i’ve been learning fast.
I have an issue with my p1s that has recently started ( i have 400 hours on my printer) and it wasnt doing this at all before.
I’m on the latest firmware and latest bambu studio. I have already tightened my belts as well as cleaned the carbon rods.
I have attached a photo of where some times the printer randomly shifts layers mid print by over 30 mm
i had an issue a couple days ago where when the print head changes color and goes to the front left corner before the change, it hit something and it and wasn’t able to do its normal step.
That print failed as well and so i stopped the print, did a recalibration of the whole printer and the next print turned out ok.
However, i’m wondering if I did something to the printer when that happened? I’m worried this will be a repeated thing cause some damage was caused or something… any advice before I open a support ticket?
Reduce the speed for “Travel” only movement by 10-20%, and reduce accelerations for all moves by a similar amount, and see if that makes the problem go away.
appreciate the response. seems weird that after 1 month of printing perfectly and then upgrading 2 weeks ago to the new firm ware that this is happening that i would have to change speed.
The BBL architecture includes provisions for detecting step losses in the motion system. If the controller tells a motor to move, it’s supposed to know if it doesn’t actually do that, and re-home to recover the system before continuing the print.
On my X1C, running prints at the highest speed resulted in random step loss (typically on travel moves, since those are the fastest speed moves). It would re-home whenever that happened.
So going fast enough causes step loss for some machines. Like mine. Which works perfectly in every other respect.
On your machine, you’re getting step loss but it’s not being detected. I don’t know enough about the design to say why that might be. But if my suspicions are correct, you will confirm that by slowing things down. So if that works and the layer shifts go away, you have some very specific data to provide to BBL so they can fix the problem for you. (I haven’t bothered with my machine, since I always run with lower accelerations and top speeds for better print quality).
As the mechanics get gummed up, the load they present to the stepper motors goes up, so the chances of a missed step go up. So the preventative maintenance correcting the issue makes sense.
