Z height always not respected

BoA

config.g would help here also

Ducati87

; Configuration file for Duet WiFi (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.1.8 on Fri Nov 20 2020 20:14:09 GMT+0100 (Ora standard dell’Europa centrale)

; General preferences
G90                                                ; send absolute coordinates...
M83                                                ; ...but relative extruder moves
M550 P"Hypercube Evolution"                        ; set printer name
M669 K1                                            ; select CoreXY mode

; Network
M552 S1                                            ; enable network
M586 P0 S1                                         ; enable HTTP
M586 P1 S0                                         ; disable FTP
M586 P2 S0                                         ; disable Telnet

; Drives
M569 P0 S1                                         ; physical drive 0 goes forwards
M569 P1 S1                                         ; physical drive 1 goes forwards
M569 P2 S0                                         ; physical drive 2 goes forwards
M569 P3 S1                                         ; physical drive 3 goes forwards
M569 P4 S0                                         ; physical drive 4 goes forwards
M584 X0 Y1 Z2:4 E3                                 ; set drive mapping
M350 X16 Y16 Z16 E16 I1                            ; configure microstepping with interpolation
M92 X161.12 Y160.37 Z393.18:393.18 E830.00         ; set steps per mm
M566 X1000.00 Y1000.00 Z15.00 E120.00                ; set maximum instantaneous speed changes (mm/min)
M203 X6000.00 Y6000.00 Z600.00 E1800.00            ; set maximum speeds (mm/min)
M201 X1800.00 Y1800.00 Z30.00 E300.00              ; set accelerations (mm/s^2)
M906 X1000 Y1000 Z1500:Z1500 E1000 I30                    ; set motor currents (mA) and motor idle factor in per cent
M84 S30                                            ; Set idle timeout

; Axis Limits
M208 X0 Y0 Z0 S1                                   ; set axis minima
M208 X0:300 Y-45:300 Z285 S0                     ; set axis maxima

; Endstops
M574 X1 S3                                         ; configure sensorless endstop for low end on X
M574 Y1 S3                                         ; configure sensorless endstop for low end on Y
M574 Z1 S2                                         ; configure Z-probe endstop for low end on Z

; Z-Probe
M950 S0 C"exp.heater3"                             ; create servo pin 0 for BLTouch
M558 P9 C"^zprobe.in" H3 F420 T9000                ; set Z probe type to bltouch and the dive height + speeds
G31 P500 X22 Y-37 Z3.070                             ; set Z probe trigger value, offset and trigger height
M557 X0:250 Y25:230 S40:40                         ; define mesh grid

; Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 B3950     ; configure sensor 0 as thermistor on pin bedtemp
M950 H0 C"bedheat" T0                              ; create bed heater output on bedheat and map it to sensor 0
M307 H0 B0 S1.00                                   ; disable bang-bang mode for the bed heater and set PWM limit
M140 H0                                            ; map heated bed to heater 0
M143 H0 S120                                       ; set temperature limit for heater 0 to 120C
;M308 S1 P"e0temp" Y"thermistor" T100000 B4725 C7.06e-8 ; configure sensor 1 as thermistor on pin e0temp
M308 S1 P"spi.cs2" Y"rtd-max31865"                 ; configure sensor 1 as thermocouple via CS pin spi.cs2
M950 H1 C"e0heat" T1                               ; create nozzle heater output on e0heat and map it to sensor 1
M307 H1 B0 S1.00                                   ; disable bang-bang mode for heater  and set PWM limit
M143 H1 S290                                       ; set temperature limit for heater 1 to 290C

; Fans
M950 F0 C"Mat Fan1" Q500                           ; create fan 0 on pin fan0 and set its frequency
M106 P0 S0 H-1                                 ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"Hotend Fan" Q500                           ; create fan 1 on pin fan1 and set its frequency
M106 P1 S1 H1 T45                              ; set fan 1 value. Thermostatic control is turned on
M950 F2 C"Mat Fan2" Q500                           ; create fan 2 on pin fan2 and set its frequency
M106 P2 S1 H-1                                 ; set fan 2 value. Thermostatic control is turned off

; Tools
M563 P0 S"hotend 0" D0 H1 F0:2                     ; define tool 0
G10 P0 X0 Y0 Z0                                    ; set tool 0 axis offsets
G10 P0 R0 S0                                       ; set initial tool 0 active and standby temperatures to 0C

; Custom settings
M404 N1.75 D0.4								        ; Nozzle and filament diameter for monitor
M200 D1.75 									        ; set all extruder filament diameters to 1.75mm
M671 X40:280 Y145:145 S10							; Define positions of Z leadscrews or bed levelling screws
M376 H10											; Set bed compensation taper

; Miscellaneous
M575 P1 S1 B57600                                  ; enable support for PanelDue
M501                                               ; load saved parameters from non-volatile memory
M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; set voltage thresholds and actions to run on power loss
T0                                                 ; select first tool

Veti

@Ducati87 said in Z height always not respected:

M92 X161.12 Y160.37 Z393.18:393.18 E830.00 ; set steps per mm

multiple values for z are not valid

M208 X0 Y0 Z0 S1 ; set axis minima

M208 X0:300 Y-45:300 Z285 S0 ; set axis maxima

this is incorrect x and y here should only have one value

BoA

This is messed up...

No G28 in start code, so no proper homing
M98 P"homeall.g" should not be in bed.g

For start code basic sequence should be something like:
G28 ; home all without mesh bed level
G32 ; gantry leveling
G29 ; mesh bed compensation

that's for start.

Also. If You just execute G28, is the nozzle on the right height - Z trigger height is correct? And by "nozzle is too high" - by how much?

Ducati87

@BoA said in Z height always not respected:

This is messed up...

No G28 in start code, so no proper homing

M98 P"homeall.g" should not be in bed.g

For start code basic sequence should be something like:
G28 ; home all without mesh bed level
G32 ; gantry leveling
G29 ; mesh bed compensation

that's for start.

Also. If You just execute G28, is the nozzle on the right height - Z trigger height is correct? And by "nozzle is too high" - by how much?

I call only G32 in the start gcode because I have the G28 and G29 S1 in the bed.g

BoA

@Ducati87 Well... I do not see any G28

I know what You have in bed.g
What I wrote is that You should not have it there

Ducati87

@BoA said in Z height always not respected:

@Ducati87 Well... I do not see any G28

I know what You have in bed.g
What I wrote is that You should not have it there

ok I will try as you suggested.

Ducati87

@BoA said in Z height always not respected:

This is messed up...

No G28 in start code, so no proper homing

M98 P"homeall.g" should not be in bed.g

For start code basic sequence should be something like:
G28 ; home all without mesh bed level
G32 ; gantry leveling
G29 ; mesh bed compensation

that's for start.

Also. If You just execute G28, is the nozzle on the right height - Z trigger height is correct? And by "nozzle is too high" - by how much?

When I call G28 the value is about 6.00. If I use the babystep I have to go over the 1.4mm....

BoA

@Ducati87 Ok then, so assuming this is bltouch

M558 P9 C"^zprobe.in" H3 F420 T9000

F420 - too fast for bltouch, I would use F120
If nozzle if 1.4mm too high - I would adjust Z trigger height

G31 P500 X22 Y-37 Z4.470 ; 3.070 + 1.4

Ducati87

@BoA said in Z height always not respected:

@Ducati87 Ok then, so assuming this is bltouch

M558 P9 C"^zprobe.in" H3 F420 T9000

F420 - too fast for bltouch, I would use F120
If nozzle if 1.4mm too high - I would adjust Z trigger height

G31 P500 X22 Y-37 Z4.470 ; 3.070 + 1.4

for too high I mean too FAR.

BoA

@Ducati87 said in Z height always not respected:

for too high I mean too FAR.

That is what I assumed

Ducati87

@BoA said in Z height always not respected:

@Ducati87 said in Z height always not respected:

for too high I mean too FAR.

That is what I assumed

ok I said just to clarify.

BoA

@Ducati87 Just one question - is that a new setup, or it was working, and is not working correctly now?

Ducati87

@BoA said in Z height always not respected:

@Ducati87 Just one question - is that a new setup, or it was working, and is not working correctly now?

it worked until I had to redo the procedure following the hotend change.

BoA

@Ducati87 And let me guess... new hotend is about 1.4mm shorter/higher or... bltouch 1.4mm lower

You can get more precise results by setting:

G31 P500 X22 Y-37 Z0.0

homing using G28

going to Z0.0 (indicated) and measuring actual nozzle tip height. Then put this measurement value as Z trigger height in G31

or after homing disable limits by M564 S0
and move head down just to touch the bed by nozzle tip, and use indicated Z value a trigger height (remove the minus obviously)

Ducati87

@BoA said in Z height always not respected:

@Ducati87 And let me guess... new hotend is about 1.4mm shorter/higher or... bltouch 1.4mm lower

You can get more precise results by setting:

G31 P500 X22 Y-37 Z0.0

homing using G28

going to Z0.0 (indicated) and measuring actual nozzle tip height. Then put this measurement value as Z trigger height in G31

or after homing disable limits by M564 S0
and move head down just to touch the bed by nozzle tip, and use indicated Z value a trigger height (remove the minus obviously)

I did it a couple of times but with same results. the value detected by the procedure is not accurate.

BoA

@Ducati87 Well... that mostly depends on probe and Your measurements accuracy. Did You slow down probing speed to 120 ?

Ducati87

@BoA said in Z height always not respected:

@Ducati87 Well... that mostly depends on probe and Your measurements accuracy.

it's an original BLtouch 3.1...I cannot understand where the problem is.

BoA

@Ducati87 You can try to add A parameter to M558, for example A4. And slow down probing speed to 120

Ducati87

@BoA said in Z height always not respected:

@Ducati87 You can try to add A parameter to M558, for example A4. And slow down probing speed to 120

ok I will try. Thank you BoA!