I have a 12mm inductive probe mounted on my Ender3. It is about 4.5mm to the left of the nozzle, 1.5mm in front of the nozzle, and about 2mm above the nozzle.
(which would be in the negative X, and Y direction, and positive Z direction relative to the nozzle).
Are the offset values entered in the firmware measured from the probe to the nozzle, or from the nozzle to the probe? (IE: are they positive or negative values in my case?)
Also, when specifying the locations on the bed where one wishes to probe, are these specified as the probe location, or the nozzle location?
As I understand it, having homed the printer, it knows where the nozzle is, and can locate the probe position by applying the probe offset values.
However, when we probe the bed to perform a tramming operation ("auto bed leveling"), we need to put the probe over specific locations.
Also, due to the offset position of the probe, we can't probe the entire bed, in my case parts of the bed that in the rear and right side of the bed
(max X and Y values) are not reachable by the probe. How is this handled in the firmware? Do we interpolate to extend the slope to the 'blind' areas, or just assume that
these areas are 'flat'?
I have my probe wired to the port that would be used by BL touch. I still have the Z end stop connected. I'd like to keep the Z end stop, and use it to initially home the printer.
The z end stop is set to keep the nozzle from crashing into the highest point on the bed, so it sets up a safe starting point for the z probe operation. Can this be done in Marlin?
(which would be in the negative X, and Y direction, and positive Z direction relative to the nozzle).
Are the offset values entered in the firmware measured from the probe to the nozzle, or from the nozzle to the probe? (IE: are they positive or negative values in my case?)
Also, when specifying the locations on the bed where one wishes to probe, are these specified as the probe location, or the nozzle location?
As I understand it, having homed the printer, it knows where the nozzle is, and can locate the probe position by applying the probe offset values.
However, when we probe the bed to perform a tramming operation ("auto bed leveling"), we need to put the probe over specific locations.
Also, due to the offset position of the probe, we can't probe the entire bed, in my case parts of the bed that in the rear and right side of the bed
(max X and Y values) are not reachable by the probe. How is this handled in the firmware? Do we interpolate to extend the slope to the 'blind' areas, or just assume that
these areas are 'flat'?
I have my probe wired to the port that would be used by BL touch. I still have the Z end stop connected. I'd like to keep the Z end stop, and use it to initially home the printer.
The z end stop is set to keep the nozzle from crashing into the highest point on the bed, so it sets up a safe starting point for the z probe operation. Can this be done in Marlin?