Getting Probe triggered prior to movement.

[dborio]

I just did a fresh install and keep getting Probe triggered prior to movement when trying to run the Full Calibration, Bed Level or Height Map. I can of course bypass it when the printer restarts and use the printer.

[robertsamples]

you should run the LOAD_CELL_TARE command with nothing on the bed and then save_config and retry.

[latispinus]

Same problem, entering the command doesn't help, the error occurs at different points on the bed

[nseverov1-sketch]

I think I found a solution. 1. I used the LOAD_CELL_TARE command at the point where the printer malfunctioned. Then, I used save_config. Then, I ran the straingauge z home macro from the web interface. Then, I used save_config again. After that, I took three full grids of the table at different temperatures, without a single error. (60,80,100 degrees C)

[latispinus]

not working for me

[latispinus]

Scan completed successfully only once after ten failed attempts and stopped working again
Everything works just fine with the default firmware

[nseverov1-sketch]

I forgot the most important thing: before everything, I washed the Z-axis screws and lubricated them with liquid oil. Maybe dirt and thick grease with dust cause stiff movement and false activations of the tensioner. Check it out.

[robertsamples]

@latispinus
if you already did load cell tare and that did not resolve it your strain gauges may be giving a different than expected response scale. you can try LOAD_CELL_CALIBRATE which will have you tare again, then place a weight of known mass (aim for around 4 kg) on the bed and run the calibrate command with the number of grams on the bed.

EDIT: latest version only requires 1kg for calibration

[nseverov1-sketch]

If I have a precision F2 class weight weighing 2kg, can I use it on the new firmware?

[latispinus]

@robertsamples
I tried these instructions
first under a 1 kg load and it produced this:
14:54 ERROR: Tare and Calibration readings are less than 1% different!
Use more force when calibrating or a higher sensor gain.
14:54 Calibration value: 1.38% (116046), Counts/gram: 25.34500, Total capacity: +/- 325.40Kg
14:54 CALIBRATE GRAMS=1000
14:53 Now apply a known force to the load cell and enter the force value with:
CALIBRATE GRAMS=nnn
14:53 Load cell tare value: 1.69% (141392)
14:53 tare
14:52 Starting load cell calibration.
1.) Remove all load and run TARE.
2.) Apply a known load, run CALIBRATE GRAMS=nnn.
Complete calibration with the ACCEPT command.
Use the ABORT command to quit.
14:52
LOAD_CELL_CALIBRATE

then under a weight of slightly over 4 kg (4,136 g), and I got this:
15:00 Accept calibration with the ACCEPT command.
15:00 WARNING: Load cell capacity is more than 25Kg!
Check wiring and consider using a higher sensor gain.
15:00 Calibration value: 0.40% (33349), Counts/gram: 26.12258,
Total capacity: +/- 315.71Kg

I tried applying the changes, and when measuring the bed, I got this:
15:11 Probe samples exceed samples_tolerance

Upd: When using the BED_MESH_CALIBRATE_WITH_WIPE macro, it again throws the error "Probe triggered prior to movement."

[robertsamples]

@latispinus Wait I cant tell what exactly you did

but with nothing on bed you should run
TARE
then place 4136 g weight on bed then run
CALIBRATE GRAMS=4136

I dont see where you entered 4136 as a command. You also need to tare first

[AJ-Fuserboomer]

Can confirm; on COSMOS 0.0.7 running on en early-build (no AMS port or LED bar) unit:
Load Cell Calibration from Printer screen functions intermittently, and while it asks for a '(Mostly) full spool', it doesn't seem to reliably read the weight.

From Console, ran:
LOAD_CELL_CALIBRATE
TARE
CALIBRATE GRAMS=1145 (one full spool)
Calibration value: -0.75% (-62965), Counts/gram: 3.80262,
Total capacity: +/- 2190.59Kg
ERROR: Tare and Calibration readings are less than 0.1% different!
Use more force when calibrating or a higher sensor gain.
ABORT
G28
_CLIENT_LINEAR_MOVE Z=250 F=1500 ABSOLUTE=1 (Bed is at top of chamber and the Head is in the center - there's no room for spools in this configuration. Possibly move bed to center of chamber &/or head back to chute before starting process?)
LOAD_CELL_CALIBRATE
TARE
CALIBRATE GRAMS=2285 (2 full spools)
Calibration value: -0.77% (-64466), Counts/gram: 20.68972,
Total capacity: +/- 404.62Kg
WARNING: Load cell capacity is more than 25Kg!
Check wiring and consider using a higher sensor gain.
Accept calibration with the ACCEPT command.
ACCEPT
Load cell calibration settings:
counts_per_gram: 20.689716
reference_tare_counts: -17190
The SAVE_CONFIG command will update the printer config file with the above and restart the printer.
SAVE_CONFIG (System reboots)
G28
BED_MESH_CALIBRATE
Probe triggered prior to movement
STRAINGAUGE_Z_HOME
probe at 20.000,20.000 is z=2.942500
probe at 20.000,20.000 is z=3.935000
Probe samples exceed tolerance. Retrying...
probe at 20.000,20.000 is z=3.885000
Probe triggered prior to movement
Probe triggered prior to movement
G28
STRAINGAUGE_Z_HOME
probe at 125.000,125.000 is z=11.245000
Probe triggered prior to movement
Probe triggered prior to movement
BED_MESH_CALIBRATE_WITH_WIPE
probe at 128.003,253.998 is z=10.960000
Probe triggered prior to movement
Probe triggered prior to movement
Probe triggered prior to movement
Probe triggered prior to movement

During the Bed Mesh Calibrate process, toolhead fan kicks on 100%, and Extruder steps down from 250c to 180c to 140c. Maintains this temp with toolhead 100% fan.

[suchmememanyskill]

Calibration value: -0.75% (-62965), Counts/gram: 3.80262,
Total capacity: +/- 2190.59Kg
ERROR: Tare and Calibration readings are less than 0.1% different!
Use more force when calibrating or a higher sensor gain.

Oh god not only does it go negative it also doesn't calibrate well

[robertsamples]

Can confirm; on COSMOS 0.0.7 running on en early-build (no AMS port or LED bar) unit: Load Cell Calibration from Printer screen functions intermittently, and while it asks for a '(Mostly) full spool', it doesn't seem to reliably read the weight.

From Console, ran: LOAD_CELL_CALIBRATE TARE CALIBRATE GRAMS=1145 (one full spool) Calibration value: -0.75% (-62965), Counts/gram: 3.80262, Total capacity: +/- 2190.59Kg ERROR: Tare and Calibration readings are less than 0.1% different! Use more force when calibrating or a higher sensor gain. ABORT G28 _CLIENT_LINEAR_MOVE Z=250 F=1500 ABSOLUTE=1 (Bed is at top of chamber and the Head is in the center - there's no room for spools in this configuration. Possibly move bed to center of chamber &/or head back to chute before starting process?) LOAD_CELL_CALIBRATE TARE CALIBRATE GRAMS=2285 (2 full spools) Calibration value: -0.77% (-64466), Counts/gram: 20.68972, Total capacity: +/- 404.62Kg WARNING: Load cell capacity is more than 25Kg! Check wiring and consider using a higher sensor gain. Accept calibration with the ACCEPT command. ACCEPT Load cell calibration settings: counts_per_gram: 20.689716 reference_tare_counts: -17190 The SAVE_CONFIG command will update the printer config file with the above and restart the printer. SAVE_CONFIG (System reboots) G28 BED_MESH_CALIBRATE Probe triggered prior to movement STRAINGAUGE_Z_HOME probe at 20.000,20.000 is z=2.942500 probe at 20.000,20.000 is z=3.935000 Probe samples exceed tolerance. Retrying... probe at 20.000,20.000 is z=3.885000 Probe triggered prior to movement Probe triggered prior to movement G28 STRAINGAUGE_Z_HOME probe at 125.000,125.000 is z=11.245000 Probe triggered prior to movement Probe triggered prior to movement BED_MESH_CALIBRATE_WITH_WIPE probe at 128.003,253.998 is z=10.960000 Probe triggered prior to movement Probe triggered prior to movement Probe triggered prior to movement Probe triggered prior to movement

During the Bed Mesh Calibrate process, toolhead fan kicks on 100%, and Extruder steps down from 250c to 180c to 140c. Maintains this temp with toolhead 100% fan.

Can confirm; on COSMOS 0.0.7 running on en early-build (no AMS port or LED bar) unit: Load Cell Calibration from Printer screen functions intermittently, and while it asks for a '(Mostly) full spool', it doesn't seem to reliably read the weight.

From Console, ran: LOAD_CELL_CALIBRATE TARE CALIBRATE GRAMS=1145 (one full spool) Calibration value: -0.75% (-62965), Counts/gram: 3.80262, Total capacity: +/- 2190.59Kg ERROR: Tare and Calibration readings are less than 0.1% different! Use more force when calibrating or a higher sensor gain. ABORT G28 _CLIENT_LINEAR_MOVE Z=250 F=1500 ABSOLUTE=1 (Bed is at top of chamber and the Head is in the center - there's no room for spools in this configuration. Possibly move bed to center of chamber &/or head back to chute before starting process?) LOAD_CELL_CALIBRATE TARE CALIBRATE GRAMS=2285 (2 full spools) Calibration value: -0.77% (-64466), Counts/gram: 20.68972, Total capacity: +/- 404.62Kg WARNING: Load cell capacity is more than 25Kg! Check wiring and consider using a higher sensor gain. Accept calibration with the ACCEPT command. ACCEPT Load cell calibration settings: counts_per_gram: 20.689716 reference_tare_counts: -17190 The SAVE_CONFIG command will update the printer config file with the above and restart the printer. SAVE_CONFIG (System reboots) G28 BED_MESH_CALIBRATE Probe triggered prior to movement STRAINGAUGE_Z_HOME probe at 20.000,20.000 is z=2.942500 probe at 20.000,20.000 is z=3.935000 Probe samples exceed tolerance. Retrying... probe at 20.000,20.000 is z=3.885000 Probe triggered prior to movement Probe triggered prior to movement G28 STRAINGAUGE_Z_HOME probe at 125.000,125.000 is z=11.245000 Probe triggered prior to movement Probe triggered prior to movement BED_MESH_CALIBRATE_WITH_WIPE probe at 128.003,253.998 is z=10.960000 Probe triggered prior to movement Probe triggered prior to movement Probe triggered prior to movement Probe triggered prior to movement

During the Bed Mesh Calibrate process, toolhead fan kicks on 100%, and Extruder steps down from 250c to 180c to 140c. Maintains this temp with toolhead 100% fan.

what result do you get after the tare command for raw counts? EG:

12:16 PM
Now apply a known force to the load cell and enter the force value with:
CALIBRATE GRAMS=nnn
12:16 PM
Load cell tare value: -2.84% (-238251)
12:16 PM
TARE
12:16 PM
Starting load cell calibration.
1.) Remove all load and run TARE.
2.) Apply a known load, run CALIBRATE GRAMS=nnn.
Complete calibration with the ACCEPT command.
Use the ABORT command to quit.
12:16 PM
LOAD_CELL_CALIBRATE

[AJ-Fuserboomer]

11:52 AM
Probe triggered prior to movement
11:52 AM
Probe triggered prior to movement
11:52 AM
Probe triggered prior to movement
11:52 AM
Probe triggered prior to movement
11:52 AM
probe at 128.003,253.998 is z=11.855000
11:49 AM
Run Current: 0.99A Hold Current: 0.99A Home Current: 0.80A
11:49 AM
Run Current: 0.99A Hold Current: 0.99A Home Current: 0.80A
11:48 AM
Run Current: 0.80A Hold Current: 0.80A Home Current: 0.80A
11:48 AM
Run Current: 0.80A Hold Current: 0.80A Home Current: 0.80A
11:48 AM
BED_MESH_CALIBRATE_WITH_WIPE
11:48 AM
Run Current: 0.99A Hold Current: 0.99A Home Current: 0.80A
11:48 AM
Run Current: 0.99A Hold Current: 0.99A Home Current: 0.80A
11:48 AM
Run Current: 0.80A Hold Current: 0.80A Home Current: 0.80A
11:48 AM
Run Current: 0.80A Hold Current: 0.80A Home Current: 0.80A
11:48 AM
G28 (after reboot)
SAVE_CONFIG
11:45 AM
Load cell calibration settings:

counts_per_gram: 19.933917
reference_tare_counts: 15547

The SAVE_CONFIG command will update the printer config file with the above and restart the printer.
11:45 AM
ACCEPT
11:44 AM
Accept calibration with the ACCEPT command.
11:44 AM
WARNING: Load cell capacity is more than 25Kg!
Check wiring and consider using a higher sensor gain.
11:44 AM
Calibration value: -0.36% (-30001), Counts/gram: 19.93392,
Total capacity: +/- 420.04Kg
11:44 AM
CALIBRATE GRAMS=2285
11:43 AM
Now apply a known force to the load cell and enter
the force value with:
CALIBRATE GRAMS=nnn
11:43 AM
Load cell tare value: 0.19% (15547)
11:43 AM
tare
11:43 AM
Starting load cell calibration.
1.) Remove all load and run TARE.
2.) Apply a known load, run CALIBRATE GRAMS=nnn.
Complete calibration with the ACCEPT command.
Use the ABORT command to quit.
11:43 AM
LOAD_CELL_CALIBRATE
11:42 AM
_CLIENT_LINEAR_MOVE Z=185 F=1500 ABSOLUTE=1
11:42 AM
Run Current: 0.99A Hold Current: 0.99A Home Current: 0.80A
11:42 AM
Run Current: 0.99A Hold Current: 0.99A Home Current: 0.80A
11:41 AM
Run Current: 0.80A Hold Current: 0.80A Home Current: 0.80A
11:41 AM
Run Current: 0.80A Hold Current: 0.80A Home Current: 0.80A
11:41 AM
G28

[robertsamples]

@AJ-Fuserboomer that is very odd. your counts per gram are reasonable.

I do notice that your z value when it starts the wipe calibration is very high, like high enough where the nozzle should not be touching the bed at 11.85 no matter how loose you have the bed mountin screws.

is anything obstructing the beds movement, when you attempt to do the level when it does that probe point do you see the nozzle contact the tap at the back of the build plate? If you do then I would try tightening all your bed screws down- elegoo says they should be tightened as much as possible basically, and then redo tare and cal, then reattempt acquiring a mesh