What change would cause warping to start happening on a P1S?

I’m not asking how to fix warping - I’ve seen the advice (warmer plate, turn off aux fan, etc etc) and I can work around the problem, but what I’ld really like to understand is what may have changed in my P1S to cause warping to start happening? My filament is dry and my plate is cleaned regularly with warm soapy water. I’ve been printing without warping for the 9 months I’ve had the machine. What sort of things could have changed that would cause warping to start? It is happening at the left edge when the plate is full and the object near the edge is fairly wide. No other symptoms, no change in the sound of the machine working. Indoor humidity and temperature haven’t changed significantly, and the AMS humidity remains at a healthy 10%.

There could be many reasons to have that kind of issue…but one thing you did not mention is bed leveling, which made me suspect that either you don’t do the auto bed leveling before every print and or you did not do the the whole machine calibration for long time (the machine shakes alot and metal expand and contracts that why you need to do the full machine calibration every once in a while).

other thing comes to mind is when was the last time you lubed the Z axis lead screws and rods and tightened the belts, you don’t need to wait for the machine to tell you it’s time to clean and lubricate the rods, depends on the conditions you might have to do clean ups before time.

another thing also comes to mind, cold draft the plate heater has to keep compensating if the machine in a very cold room, which causing the bed to have rapid cool down and heat up, that makes the build plate to move up and down while printing.

troubleshoot with these point, and i hope these helps out, if non solved your concern, let me know so we can dive deeper into troubleshooting.

Thanks. Some of those points I’m good with already, but not all:

  • auto bed levelling: yes, every print
  • whole machine calibration: only when I set it up initially (sits on concrete, doesn’t shake noticably)
  • lube & tighten: shamefully I haven’t done so yet; until this week every print had been perfect and I tend to be of the “if it ain’t broke, don’t fix it” school, having seen disasters in the past from Preventive Maintenances that caused more problems than they prevented! (in another context, not talking about this printer)
  • cold draft: no, very temperate room, connected to an air-conditioned area but not in the airflow of the air conditioner draft. Room temperature is pretty stable around 20C.

I’m not suspicious of environmental factors but I can easily believe that insufficient PMs could be at the root of this, although I would have expected things to get worse slowly and incrementally, not all at once as what happened with three consecutive prints until I stopped trying to fill the plate and printed the larger items in the center of the plate on their own.

Thanks for the reply and advice.

having the machine on concrete is wonderful, but you still have to re run the full machine calibration, but do that after the lubing and tightening.

didn’t the maintenance message appear on your machine? i mean 9 months is way overdue the lubrication date, preventive maintenance is important for bambu machines the accuracy in these machines requires the trouble to keep the same level of perfection as if it is still fresh out of the box.

i understand its a bothering process, but start with the cleaning, lubrication, calibration processes, then check again if the object left up on that same corner, in this way you can eliminate the unmaintained machine issue, then we can go further with other probable causes, and while at it flip the the textured plate on the other side to add it to the elemenitation steps.

Definitely do this soon

I do a recalibrate any time 1) change position of the machine on the table/workbench 2) change nozzle and 3) at the end of every time the machine barks at me to do other maintenance things

If you put a stack of books on the table next to your printer, it will likely benefit from autocalibrate motor compensation, that’s how much you should love running it

1 Like