Auto level using 3 ball screw

moth4017

@jay_s_uk
hi i thourght the s value was for number of motors as in this example from the Duet 3 documentation
G30 P2 X100 Y10 Z-99999 S3 ; probe point 2 near a leadscrew and calibrate 3 motors

i didnt read it correctly
The S parameter on the last G30 command in the sequence indicates that a complete set of points has been probed and instructs the firmware what sort of calibration to perform.

jay_s_uk

@moth4017

The S parameter on the last G30 command in the sequence indicates that a complete set of points has been probed and instructs the firmware what sort of calibration to perform.

and

Cartesian/CoreXY kinematics: S-1 will report the Z offset for each probed point, but no calibration is done. S0 specifies that the number of factors to be calibrated is the same as the number of points probed. Otherwise, the value indicates the number of factors to be calibrated, which must be no greater than the number of points probed, eg S3 in the above example with 3 points probed

my understanding is its the number of points

moth4017

@jay_s_uk ok when i set it s4 with 4 points probed i get this error
Error: Number of calibration factors (4) not equal to number of leadscrews (3)

jay_s_uk

@moth4017 maybe you're right then

moth4017

@jay_s_uk whick means the documentation on the Duet doc sight is incorrect

jay_s_uk

@moth4017 maybe @droftarts can investigate

R006

@jay_s_uk yes i know it's mistake in copy paste.

Please help me

Phaedrux

What does the console report after you run G32?
If you run it several times in a row, what does it say each time?
How are you homing before?

Please share all your config.g and homing files. It would also be nice to know your firmware version and what type of probe.

moth4017

@R006 i ran this code on my printer

G28
;do what you need to deploy probe
G30 P0 X30 Y30 Z-9999
G30 P1 X30 Y270 Z-9999
G30 P2 X270 Y270 Z-9999
G30 P3 X270 Y30 Z-9999 S3

This is the result in the console

Leadscrew adjustments made: 1.149 -0.144 -0.766, points used 4, (mean, deviation) before (-0.119, 0.653) after (-0.000, 0.023)

you would need to run the same code again without the G28

and here are my results
Leadscrew adjustments made: 0.006 0.021 0.025, points used 4, (mean, deviation) before (0.019, 0.024) after (0.000, 0.023)

you will see that the mean deviation from the first run was
(-0.119, 0.653)
second run
(0.019, 0.024)

the more times you run it the deviation should become less ,

R006

@moth4017 ok i will try this

moth4017

@R006 hi it would be good to see your config .g file and bed.g file

R006

@moth4017
config.g

; Drives
M569 P0 S1
M569 P1 S1
M569 P2 S1
M569 P3 S1
M569 P4 S1
M569 P5 S1
M584 X0 Y1 Z2:3:4 E5
M350 X8 Y8 I0
M350 Z16 E16 I1

; Auto level, coordinates as per motor order in M584
M671 X150.05:-52.00:372.00 Y375.05:23.50:23.50 S5.0

; bed.g

G30 P0 X30 Y30 Z-9999
G30 P1 X30 Y270 Z-9999
G30 P2 X270 Y270 Z-9999
G30 P3 X270 Y30 Z-9999 S3

moth4017

@R006 said in Auto level using 3 ball screw:

M671 X150.05:-52.00:372.00 Y375.05:23.50:23.50 S5.0

this doesnt look correct- M671 X150.05:-52.00:372.00 Y375.05:23.50:23.50 S5.0

if i took a guess at yours it would be
M671 X-52 150: 375 Y-15:318:-15

your M671 coordinates need to be in the order of z2,z3,z4

R006

@moth4017 sorry it's my mistake in copy paste

My M671 X-52.00:150.05:372.00 Y-23.50:375.05:-23.50 S5.0

and i will try hope so it's working

R006

@moth4017 hello,
i try but it's not working
reading
trigger height-1.30
Before auto level:0.240,0.680,-1.317,0.071
After 4 time auto level:0.718,1.511,0.651,1.547

then change trigger which is 1.47
Before auto level:0.223,0.119,-1.132,0.722
After 4 time auto level:-0.262,0.415,-0.440,0.636

Please help me

Phaedrux

@Phaedrux said in Auto level using 3 ball screw:

Please share all your config.g and homing files. It would also be nice to know your firmware version and what type of probe.

moth4017

@R006 can you try this probe repeatability test just to see if it is ok

;you need to home all axis's first and make sure your probe is deployed


M291 P"Probe will be tested 10 times and return mean and standard deviation. Ok or Cancel?" R"WARNING" S3 ; User must click OK or cancel.
;G28

G30 P0  X150 Y150 Z-9999
G30 P1  X150 Y150 Z-9999
G30 P2  X150 Y150 Z-9999
G30 P3  X150 Y150 Z-9999
G30 P4  X150 Y150 Z-9999
G30 P5  X150 Y150 Z-9999
G30 P6  X150 Y150 Z-9999
G30 P7  X150 Y150 Z-9999
G30 P8  X150 Y150 Z-9999
G30 P9  X150 Y150 Z-9999 S-1
M402

your result should look like this
2/7/2024, 5:01:11 PM G32 bed probe heights: 0.016 0.013 0.012 0.011 0.011 0.009 0.009 0.009 0.009 0.009, mean 0.011, deviation from mean 0.002

please post the result

R006

@Phaedrux
config
; Drives
M569 P0 S1
M569 P1 S1
M569 P2 S1
M569 P3 S1
M569 P4 S1
M569 P5 S1
M584 X0 Y1 Z2:3:4 E5
M350 X8 Y8 I0
M350 Z16 E16 I1

; Auto level, coordinates as per motor order in M584
M671 X-52.00:150.05:372.00 Y-23.50:375.05:-23.50 S5.0

homeX
G91
G1 H2 Z5 F6000
G1 H1 X-305 F1800
G1 H2 X5 F6000
G1 H1 X-305 F360
G1 H2 Z-5 F6000
G90

homeY
G91
G1 H2 Z5 F6000
G1 H1 Y-305 F1800
G1 H2 Y5 F6000
G1 H1 Y-305 F360
G1 H2 Z-5 F6000
G90

homeZ
G91
G1 H2 Z5 F500
G1 H1 Z305 F500
G1 H2 Z-20 F500
G1 H1 Z305 F500
G90
G92 Z300

home all
G91
G1 H2 Z5 F6000
G1 H1 X-305 Y-305 F1800
G1 H2 X5 Y5 F6000
G1 H1 X-305 Y-305 F600
G1 H1 Z305 F500
G1 H2 Z-20 F500
G1 H1 Z305 F500
G90
G92 Z300

R006

@moth4017 Means it's probe only one point and give mean & deviation?

moth4017

@R006 yes, it checks the repeatability of the z probe