Using latest releases of Slic3r, Cura and KISSlicer I've observed the nozzle interfering / dragging on the previous layer, enough to deform the shape as it runs it's path.
Using KISSlicer, I played with changing the nozzle width (trickery) and flow tweak from 0.50 - 1.2, didn't help only hindered. I was using SeeMecnc 1.75mm ABS through a 0.7mm nozzle, tested between 210-230C extrude and all at 80C bed. Tested between 40-80 mm/s print speed.
Is this due to the Z calibration being too close to the bed?
Nozzle Dragging vs Z-calibration
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Re: Nozzle Dragging vs Z-calibration
Unless it's the first couple of layers, it's more likely to be too much plastic being extruded, you need to do an extruder calibration.
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Re: Nozzle Dragging vs Z-calibration
Would the 'flow tweak' have confirmed this? <0.80 it doesn't flow enough material to print without major holesPolygonhell wrote:Unless it's the first couple of layers, it's more likely to be too much plastic being extruded, you need to do an extruder calibration.
Re: Nozzle Dragging vs Z-calibration
If the dragging is happening above the first couple layers it is an mis-calibrated extruder. If it is happening only in the first couple of layers, it is likely a mis-calibrated z-height. So you don't really need to play with the flow tweak. Really, you need to print something more than a couple of millimeters tall with a flat top and examine if it is still dragging on the top. If it is, you need to re-calibrate the extruder. If not, subtract a tenth of a millimeter from the z-height and retest until you are happy with the results. It is entirely possible it is a combination of the two...MegaMechatronics wrote:Would the 'flow tweak' have confirmed this? <0.80 it doesn't flow enough material to print without major holesPolygonhell wrote:Unless it's the first couple of layers, it's more likely to be too much plastic being extruded, you need to do an extruder calibration.
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Re: Nozzle Dragging vs Z-calibration
Thank you Poly and MSU for the tips