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How Does Drinter Find Z Zero?

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How does the controller find Z Zero? I am using feeler gauges to level the bed and I am wondering how thin is too thin? If I use a .0015 gauge to level the bed does this create an issue with the extrusion on the brim and first layers?

It would be helpful general knowledge to know how the machine records its set positions from home (0,0,0) and if this is pre-programmed into the machine or if it is recorded during the bed leveling procedure.


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During that procedure the firmware expects a distance of 0.1mm between nozzle and glass which is what a "standard printer paper" usually is.


Oh, glad you mentioned this, cause I've been wondering about this.

The leveling aid I got with my UM2+ (that blue calibration card), is actually about 0,15mm thick. My paper (some generic 80g/m² office paper) cones in around 0,07mm. If the printer is expecting 0,10mm, both would be off.

To add to the confusion further, fbric8 suggests here: https://fbrc8.zendesk.com/hc/en-us/articles/205003654-Leveling-the-Bed-Alternate-Instructions- to have the nozzle actually touch the glass bed, i.e. 0,00mm

Apparently it doesn't much matter in the end, as it is printing fine either way, but what is actually the correct or intended distance? 0,100 mm?

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