print head presses on the heated bed
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Even though I have a capacitive sensor, the print head still presses on the glass plate of the heated bed when there are bumps...can I set it differently so that this doesn't happen?
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Not sure what you mean by "when there are bumps".
Can you clarify that? What is the printing doing when this happens?
Thanks.
Frederick
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@fcwilt The glass plate and the bed are very large 700 x 800 mm. The natural fluctuation is approximately 1.2 mm across the entire surface. If I set my z-offset at a certain point, it can still happen that the bed is slightly higher at another point. When the printer then prints (despite bed leveling) and the glass is a little higher, it pushes the entire print head upwards, which pushes the nozzle into the glass. I thought this could be avoided with bed leveling and the tube.
Here is the current elevation map:
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What do you mean when you say "If I set my z-offset at a certain point"?
With the deviation you have in your bed you are going to need to use Mesh Bed Compensation which is what the height map is needed for.
You mentioned "bed leveling" and I don't know if you mean true bed leveling using G32 or are simply using the wrong term for Mesh Bed Compensation.
Are you setting the Z=0 Datum using G30 are a fixed location like the center of the bed?
You must set the Z=0 Datum before you create the height map and before you load the height map at the start of a print.
Also it is best to create the height map at the same bed temperature that would be used during printing.
Frederick
