G30 dual speed probing with S<0
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I hvae a bltouch configured and working with
M558 P9 C"^io1.in" B1 H5 F600:60 T6000
When homing Z i use
G30
and as expected the probing is done once quickly and then more slowly in the second pass.With my calibration macros i use
G30 S-2
to set the probe z offset with this it only probes with the faster speed.I am working around the problem by reconfiguring the probing speeds to
F60
in the calibration macros.Is this behaviour expected or a bug?
RepRapFirmware for Duet 3 Mini 5+ version 3.4.0 (2022-03-15 18:59:15) running on Duet 3 Mini5plus WiFi (SBC mode)
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For extra fun, it seems
M558
resets the X and Y values (but not Z) of the probe offset set in G31.4/1/2022, 7:36:56 PM G31 Z probe 0: current reading 0, threshold 500, trigger height 0.700, offsets X0.0 Y0.0 U0.0 4/1/2022, 7:36:38 PM M558 P9 C"^io1.in" B1 H5 F60 T6000 4/1/2022, 7:36:25 PM M558 Z Probe 0: type 9, input pin io1.in, output pin nil, dive height 5.0mm, probe speeds 60,60mm/min, travel speed 6000mm/min, recovery time 0.00 sec, heaters suspended, max taps 1, max diff 0.03 4/1/2022, 7:36:13 PM G31 Z probe 0: current reading 0, threshold 500, trigger height 0.700, offsets X56.0 Y16.0 U0.0 4/1/2022, 7:36:10 PM g31 x56 y16
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From the documentation:
M558 with P parameter deletes the existing probe with that K number (if any) and creates a new Z probe. This resets the G31 values for that probe to default values.
Is that what you are seeing?
Frederick
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@fcwilt Thanks, for pointing that out. I should have read that doc more thoroughly.
I have also found a proper solution which is to specify
M558 A2
(or higher) which causes all theG30 S-2
to probe slowly on the second (and third) probes.I'm still surprised by the difference in behaviour between
G30
andG30 S-2
in my previous configuration.