@FyxTheProto

These printbeds from aluminium-core pcb material have these problems from the beginning, especially for the bigger beds.

All beds made from rolled sheetmetal.
Bigger like 100*150mm big.

Switch to cast aluminium plates and slilicon heater mats to get around this. Yes its not that cheap, and heater power for the heavier plate is needed, 0,25w per cm2 at least, better a bit more if ABS like bed temperatures are needed.

Dont know what kinematics your printer have, the heavier beds may better build in printers with ulti/corexy/hbot/delta kinematics or cartesic with vertical-only bed axis

@Natanox @FyxTheProto

Then you print every part with a bow on the downside, but reliable the same bow as your bowed bed plate.

Every print take longer start time.

Your bed probe sensor can get broken.

The measurements have thermal related errors. Maybe you should have different custom start gcode for different heating bed temperatures to probe different by filamentspecific bed temperatures.

I dont see the part where it get better in every manner.

@gafu @FyxTheProto That's why it's probing after the bed is already heated up. The longer start time isn't necessarily the case, it depends on how you configure Klipper (it may also only measures on demand and otherwise use one measurement to zero in on the known profile).

The thing with the bow is true. However from my experience with both printers that have and don't have a Z probe I'll definitely take the one with the probe every time. No matter if the plate is warped or not.

@Natanox @FyxTheProto

Maybe your "nonprobe" printer isnt reliable, besides the probe thing

On my side the old wooden makerbot clone was the sqishy one, who likes to fail the first Print sometimes midsummer when the wood soakes the moisture up and the wooden enclosure get bigger and so the mechanical z endstop wanders with the enclosure.

After preheat again to ABS temperature in the enclosure it get back to normal shape.

I could modify it to have the endstop related to same height as the XY kinematics mountings to cancel this, but overall it doesnt bother me enough. If i use this machine often it even doest applycat all.
Printed some kilometers of filament on this one, whondering about this thig still works 😉