Another Z-Probe thread

So I built a delta. I configured everything, got it very close to levelled, then configured zprobe and everything worked magically. See config:

# optional Z probe
zprobe.enable true #                         false           # set to true to enable a zprobe
zprobe.probe_pin 1.28^ #                     1.28!^          # pin probe is attached to if NC remove the !
zprobe.slow_feedrate 20 #                    5               # mm/sec probe feed rate
zprobe.debounce_count                       100             # set if noisy
zprobe.fast_feedrate                         100             # move feedrate mm/sec
zprobe.probe_height 19.5 #                   5               # how much above bed to start probe
#gamma_min_endstop                           nc              # normally 1.28. Change to nc to prevent conflict,

leveling-strategy.delta-calibration.enable true # basic delta calibration
leveling-strategy.delta-calibration.radius 80 # the probe radius
leveling-strategy.delta-calibration.initial_height 50

leveling-strategy.delta-grid.enable true
leveling-strategy.delta-grid.radius 70
leveling-strategy.delta-grid.size 5
leveling-strategy.delta-grid.probe_offsets 0,16,15
leveling-strategy.delta-grid.initial_height 50


This worked like a charm. G32 set the endstop calibration and the delta radius perfectly. G29 did the grid probe and stored it. Everything worked very well. I changed the bed, however, and raised it a few mm, and levelled it a little better, and now when I run G32, the printer goes to the end stops, bolts down to the “initial_height”, eases down until the probe triggers, and then says:

> G32
Calibrating Endstops: target 0.030000mm, radius 80.000000mm
set trim to X:0.000000 Y:0.000000 Z:0.000000
Calibration failed to complete
ok
>

Any thoughts?

Imported from wikidot

Your initial height is probably too high it should be about 10mm. It is probably thinking the probe will never trigger.
FYI using probe offsets for delta grid is NOT recommended. This will produce sub optimal results.