Hi all,
TLDR;
I built my custom delta printer and it works well. However since I have it enclosed and the build chamber heats up to around 45-50°C I noticed the probe on the smart effector has become somewhat unreliable. Is that a known issue?
So here is what happens:
I start a print while the smart effector is "cold" (room temperature). Before each print I probe the bed and create a heightmap. First print, while the effector is more or less on room temperature the readings are fine, the bed is flat, first layer looks good.
After a couple of hours the print finishes and the effector has heated up to whatever temperature is in the chamber, when printing ABS this is around 45-50°C.
I remove the build surface, pop off the print, put it back in the enclosed printer and start the same gcode again.
Unfortunately the probe now delivers very inaccurate results, it reports pretty hefty low spots of -0.15 to -0.25mm where there clearly are none. I made sure of that using a straight edge.
I can reproduce that behaviour every time I let the printer cool down completely, that happens over night usually, and start the first print. Probing is fine and as soon as it soaked enough heat the probe readings are off the charts.
My current solution is to not probe the bed automatically, that is no big issue from the mechanical/printing perspective since it is flat enough but that also removes the option for me to swap build plates since they have a different thickness.
