Heatbed uneven temperature - damaged?
Hi,
I upgraded my MK3 to an MK3S with MMU2S.
Now, apparently the cable bundle at the bottom of the extruder carriage stuck out too much and pressed down on the connector cover of the heat bed during calibration, bending the heat bed down and throwing off the Z calibration results.
During subsequent operation, the nozzle pushed and bent the heat bed in the left back edge area down about 6 mm.
I fixed the issue, there is no visible damage to the heat bed, and it is still flat and straight.
The printer passes self test, calibrates properly now, and overall seems to function as intended.
However, I now have strange first layer adhesion problems. I found out that the back right of the heat bed is much cooler than the rest. If I print at the front area of the heat bed the adhesion is fine.
Could my heat bed be damaged, causing the uneven temperature? Isn't the heat bed just a continuous loop spiral that is either electrically open or closed?
Thanks,
Etienne
Re: Heatbed uneven temperature - damaged?
How do you know it is cooler? Did you measure it or use a thermal camera? It is normal for the edges to be a little cooler than the center, so some actual numbers would be informative.
If you are only guessing, then there are any number of other reasons that first layers will not stick... (dirty bed, too high in that area, etc...)