feat: improve bed leveling precision and speed #2
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This significantly improves the ABL algorithm by enabling multiple Z-probing. The default ABL routine only uses one probe, so it has to be slow to be accurate. By turning on the multiple Z-probing feature, machine speed limits during probing can be increased without losing accuracy. These changes increase XY moves during Z-probing to 300 mm/sec, and Z probe speed to 12mm/sec during fast probe and 6mm/sec during slow probe. NOTE: Maximum Z movement speed under machine limits was increasted to 10. This should be safe, because it's the same as what some other i3-like printers use, but please test if this is ok on Neptune 3 Pro.
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Description
This significantly improves the ABL algorithm by enabling multiple Z-probing. The default ABL routine only uses one probe, so it has to be slow to be accurate. By turning on the multiple Z-probing feature, machine speed limits during probing can be increased without losing accuracy. These changes increase XY moves during Z-probing to 300 mm/sec, and Z probe speed to 12mm/sec during fast probe and 6mm/sec during slow probe.
NOTE: Maximum Z movement speed under machine limits was increased to 10. This should be safe, because it's the same as what some other i3-like printers use, but please test if this is ok on Neptune 3 Pro.
Requirements
Neptune 3 Pro
Benefits
I tested this on my Neptune 3 Pro, doing 20 bed levels with the default ABL configuration and 20 bed levels with this tweaked configuration.
The stock firmware leveled the bed in about 4 minutes and 20 seconds, with a standard deviation of 0.029 mm.
My tweaks leveled the bed in about 3 minutes and 15 seconds, with a standard deviation of 0.006 mm. This is faster and more precise!
The Z-probe tweaks I applied are similar to the way that the Prusa Mini has this configured.
Full data from my testing is available here.
Configurations
N/A
Related Issues
N/A