longterm probe reliability testing

SanderLPFRG

Hi all,

we are trying to test the reliability of our new loadcell probing system to see if it lasts 10 years.

it equals to a load of probes (213.000) which I plan to test in 4 stages (53.250 per test)

I wanted to test it with a loop;

while iterations<53250
    G30 P{iterations} Z-9999
;endif
G30 P53250 Z-9999 S-1

But quite quickly I get the error "Error: G30: Z probe point index out of range"

Is there a different way to do these long tests?

droftarts

@SanderLPFRG What are you trying to measure? If you just want the measured height, use G30 S-1 without a P or Z parameter. This should report in the console the measured height each time. You can probably write the result to a log file on the SD card.

The G30 P parameter is used to measure the height error from the Z datum, for use in bed plane correction. I think the maximum number of points is 32. These are stored in memory, which is limited. I don't think this is the data you want, or need, to collect.

See https://docs.duet3d.com/en/User_manual/Reference/Gcodes#g30-single-z-probe

Ian

Notepad

@SanderLPFRG
You might find this helpful, this is a homing then testing script we use when testing new probes or trying to isolate probe drift

;Start squence
; Home machine and then set postion for Probing
;; reduce accelerations to avoid false triggering 
M201 X500 Y500				; reduce acceleration to avoid false triggering


;== Home Axis X
M98 P"homex.g"
;== Home Axis Y
M98 P"homey.g"
;== Home Axis X
M98 P"homex.g"
;== Home Axis Z
M98 P"homez.g"
;start sensor test loop

while true
  ; Home machine and then set postion for Probing
  G28 Y
  G28 X
  G1 X110 Y170 F6000

  ;Probe bed and save offset value
  G30 s-1
  echo >>"0:/sys/debug/probe.csv" {sensors.probes[0].lastStopHeight},{sensors.analog[1].lastReading},{sensors.analog[0].lastReading}

  ;Lower bed ready for restart
  G1 Z10

This keeps track of the probes z position when triggered, as well as the bed and nozzle temps.

SanderLPFRG

@Notepad @droftarts ,

My goal is to test a shitload of probes, and see how much it starts to deviate after thousands. Your script might actually work, let me test