Best posts made by jltx

Well that was quick. I found if I right click there is a reload menu which caused it to come alive. All works great now! Hope this helps someone else.

Ok, it was as simple as using raspi-config to boot to terminal (CLI) instead of desktop (GUI). I'm new to RPi so this was probably obvious to all.

BTW, fun fact, the desktop uses about 600 KB RAM at 1280x900. That leaves me with about 960 KB free which I hope is sufficient.

Bonus side effect was switching to CLI and back seems to have resolved my system instability. So I am happy.

OK, I may have inadvertently resolved it.

I found how to remove the desktop and boot to terminal using raspi-config. I wanted to understand the RAM cost. I have an RPi4b with 2GB RAM.

FYI:
in terminal mode after boot I have 1.5 GB free.
In desktop gui with DWC running at 1280x900 I have 960 KB free.

Anyway, after switching back to GUI mode everything boots as expected and DWC starts. So I suspect my config was whacked somehow (I touched nothing!) and running the rasp-config corrected the situation.

Sorry for all the bother.

@micaheli I got bed leveling to work using the latest unreleased firmware. See this thread. Note that I am NOT using touch mode. There are still some mysteries but it appears to be working.

https://forum.duet3d.com/topic/37755/szp-for-bed-level-in-3-6-rc1/19?_=1742942881479

@sebkritikel Awesome news! Thank you.

@jltx

third try was the charm. working now. sorry for the noise

@jay_s_uk Thanks for clearing that up. Too bad because the Pi antenna is poop. But at least I can simplify things.

spoke too soon. I ran it again and it made odd adjustments to the Z motors and then the head crashed into the bed pretty bad. I also noticed that it only does the first dive, not the second, e.g. 15 but not 5.

; Clear any bed transform
M561

; Turn off noisy Extruder motor
M84 E0


; Lower currents, speed & accel
M98 P"/macros/print_scripts/setup_probing.g"

;if !move.axes[2].homed
  ; Home all axes
  G28

  G1 Y240 Z6      ; move coil over bed and higher than trigger point
  M558.1 K1 S1.5  ; calibrate height coeff

  ; Probe the bed at 3 points, x3 for more precision
  M558 K1 H15:5 F800 T15000; increase the depth range, gets the gantry mostly level immediately
  M98 P"/sys/bed_probe_points.g"
  M558 K1 H4:2 F400 T15000  ; reduce depth range, probe slower for better repeatability
  M98 P"/sys/bed_probe_points.g"
  ; last attempt will be auto-repeated


M558 K1 H1 F60 T15000   ; reduce depth range, probe slower for better repeatability
while move.calibration.initial.deviation > 0.01 ; 0.003
  if iterations > 3
    abort "Too many leveling attempts! Canceling print."
  M98 P"/sys/bed_probe_points.g"
  echo "Current deviation: " ^ move.calibration.initial.deviation ^ "mm"
echo "Leveling complete"

;use mechanical instead? G30 S-2 ; Z=0

; Restore high currents, speed & accel
M98 P"/macros/print_scripts/setup_printing.g"