Dots left on bed during probe prior to print
I see a few people reporting this, but not recently. Anyone have a good fix for dots left on print bed (that then end up embedded in the print) during probing prior to printing?
Thanks!
RE:
I believe you can edit the startup G-code and reduce the temperature below the melting point (sacrificing some accuracy because of thermal expansion but it's a compromise in any case - doing this at full print temperature would melt holes into a PEI plate)
This is the original code, adjust to taste:
M109 R{((filament_notes[0]=~/.*MBL160.*/) ? 160 : (filament_notes[0]=~/.*HT_MBL10.*/) ? (first_layer_temperature[0] - 10) : (filament_type[0] == "PC" or filament_type[0] == "PA") ? (first_layer_temperature[0] - 25) : (filament_type[0] == "FLEX") ? 210 : 170)} ; wait for MBL temp
This is one of the more annoying features of the architecture, IMHO. Eddy current sensor, anybody?
RE: Dots left on bed during probe prior to print
Eddy current sensor, anybody?
Definitely no to that. Then the Diamondback nozzles won't work. That's what happened on my H2D. It's uses an eddy current sensor to determine nozzle offset. Doesn't work with the diamondbacks.
RE:
I was thinking a bit further out of the box ... scans my 350 mm print plate in about 20 seconds.
Ask an XL owner, what they'd think about that (but no, I don't own an XL)
Eddy current is just relative, I need one absolute reference point which is derived from a change in gradient "dSensor/dZ" when a solid part - this may or may not be the nozzle - touches the printbed.
Let's take the "eddy current" comment just as a glimpse into the future, the technology does exist 🙂
RE: Dots left on bed during probe prior to print
I have this problem with TPE-83A, to the point where probing fails. It tries in a little circle, so I end up with a dozen or more dots in about a 15 mm diameter circle. Being TPE, I then have to rub them off and clean everything again. This is with a satin plate. Haven't tried it yet, but a comment in a machining forum said the default temperature for the generic flex profile is too high, 210 C, and to change the code down to 170 C. I haven't tried it yet, but it makes sense. I did confirm the 210 number in a text editor. So, the above code fix looks like the thing to try.