markniu
Aluminum bed
Just one question:
Does this work reliable with a pure aluminum bed?
they will work, calibrated to that bed/mass.
I've now had to give up on this variation, as every time I change a print bed surface, i have to re-cal Z as the print surface and the bed mass are not the same for different print bed plates here. Yes I have mag/flex beds, aluminum main plate etc, but when I pop on a flex sheet with g-10 or PET etc, the thicness of my first layer is toast as this sensor still sees the original mass, even though i may now be a full mm closer to the nozzle. thicker non metal print surface).
Understood, changing surface materials will will need recalibration. Since my bed wont change the surface ( 'pertinax' glued on cast aluminum) i'll give it a try.
Does anybody know, if the detecting distance is reduced to 53% using pure aluminum like it happens on 'normal' inductive probes?
that's correct, and it is the same as normal inductive probe.
Does anybody know, if the detecting distance is reduced to 53% using pure aluminum like it happens on 'normal' inductive probes?
Okay, so I'll calculate with a reduced detecting distance around 2 mm, deducting my 0.5 mm 'pertinax' sheet gives me 1.5 mm overall distance and about a third of that for mounting tolerance between probe and nozzle tip leaving me with just 1 mm headroom. Sporty - but seems feasible.
@markniu
I propose to mention this circumstance and the correction factors for other types of metal in the technical description to avoid ambiguities.
Just for reference:
Correction coefficients (approx.)
Iron 1.00
Stainless steel: 0.76
Brass: 0.50
Aluminum: 0.48