BL Touch

[dc42]

@Gost101 said in BL Touch:

@dc42 The room temperature is 22.9C but can be low as 15.5C. The target temperature of the bed is 70*C.

Hmm, very odd then that it reported a gain (A parameter) of 30.8. The computed gain should be higher than the temperature rise during tuning. So if the indicated bed temperature was 22.9C when you started tuning, and it reached 70C, then the gain should be greater than 47. OTOH if the bed was already at e.g. 45C then you started tuning, then the computed gain would indeed be much lower than it really is. Tuning must start with the heater reading close to room temperature.

You could try using M307 H0 A55 C297 D23.

[Gost101]

@dc42 said in BL Touch:

M307 H0 A55 C297 D23

I appreciate it. I just ran

M307 H0 A55 C297 D23

Then I started:

M303 H0 S70

Hopefully it will work out.

[Gost101]

@dc42 This is the result:

9/29/2020, 2:16:35 PM	Auto tune heater 0 completed in 2457 sec
Use M307 H0 to see the result, or M500 to save the result in config-override.g
9/29/2020, 2:03:47 PM	Auto tune phase 3, peak temperature was 70.0
9/29/2020, 2:03:43 PM	Auto tune phase 2, heater off
9/29/2020, 1:35:43 PM	Auto tune phase 1, heater on
9/29/2020, 1:35:38 PM	M303 H0 S70
Auto tuning heater 0 using target temperature 70.0°C and PWM 1.00 - do not leave printer unattended
9/29/2020, 1:35:04 PM	M307 H0 A55 C297 D23

[jay_s_uk]

@Gost101 that's worked then.
As it says, Send M500 and make sure M501 is part of your config

[Gost101]

@jay_s_uk I do not have M501. What is it and where should it be in the config?

; Configuration file for Duet WiFi (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.1.4 on Mon Sep 28 2020 07:45:49 GMT-0600 (Mountain Daylight Time)
 
; General preferences
G90                                                ; send absolute coordinates...
M83                                                ; ...but relative extruder moves
M550 P"A.C.E."                                     ; set printer name
M918 P1 E4 F2000000                                ; configure direct-connect display
 
; Network
M551 P"SpaceForceHu2020!!"                         ; set password
M552 S1                                            ; enable network
M586 P0 S1                                         ; enable HTTP
M586 P1 S0                                         ; disable FTP
M586 P2 S0                                         ; disable Telnet
 
; Drives
M569 P0 S1                                         ; X physical drive 0 goes backwards
M569 P1 S1                                         ; Y physical drive 1 goes backwards
M569 P2 S0                                         ; Z One physical drive 2 goes forwards
M569 P2 S0                                         ; Z One physical drive 2 goes forwards
M569 P3 S0                                         ; E physical drive 3 goes backwards
M584 X0 Y1 Z2 E3                                   ; set drive mapping
M350 X16 Y16 Z16 E16 I1                            ; configure microstepping with interpolation
M92 X80.00 Y80.00 Z400.00 E415.00                  ; set steps per mm
M566 X1200.00 Y1200.00 Z24.00 E300.00              ; set maximum instantaneous speed changes (mm/min)
M203 X9000.00 Y9000.00 Z180.00 E6000.00            ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z100.00 E5000.00              ; set accelerations (mm/s^2)
M906 X800 Y800 Z800 E1000 I50                      ; 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 X500 Y500 Z500 S0                             ; set axis maxima
 
; Endstops
M574 X1 S1 P"xstop"                                ; configure active-high endstop for low end on X via pin xstop
M574 Y1 S1 P"ystop"                                ; configure active-high endstop for low end on Y via pin ystop
M574 Z1 S2                                         ; configure Z-probe endstop for low end on Z
 
; Z-Probe
M950 S0 C"exp.heater7"                             ; create servo pin 0 for BLTouch
M558 P9 C"^zprobe.in" H5 F600 T9000                ; set Z probe type to bltouch and the dive height + speeds
G31 P500 X37 Y0 Z2.150                               ; set Z probe trigger value, offset and trigger height
M557 X30:470 Y30:470 S25                           ; define mesh grid
 
; Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 B4092     ; 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 B1 S1.00                                   ; enable bang-bang mode for the bed heater and set PWM limit
M140 H0                                            ; map heated bed to heater 0
M143 H0 S70                                        ; set temperature limit for heater 0 to 70C
M308 S1 P"e0temp" Y"thermistor" T100000 B4092      ; configure sensor 1 as thermistor on pin e0temp
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
 
; Fans
M950 F0 C"fan0" Q500                               ; create fan 0 on pin fan0 and set its frequency
M106 P0 S1 H-1                                     ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"fan1" 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"fan2" Q500                               ; create fan 2 on pin fan2 and set its frequency
M106 P2 S1 H1:0 T45                                ; set fan 2 value. Thermostatic control is turned on
 
; Tools
M563 P0 S"Hot end" H1 D0 F1:2                           ; define tool 1
G10 P1 X0 Y0 Z0                                    ; set tool 1 axis offsets
G10 P1 R0 S0                                       ; set initial tool 1 active and standby temperatures to 0C
 
 
; Custom settings are not defined
 
; Miscellaneous
M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; set voltage thresholds and actions to run on power loss
 
 

[Phaedrux]

When you use M500 to save computed values, they go into config-override.g. M501 loads the config-override.g file. So add M501 to the end of config.g so that it gets loaded at startup.

[Gost101]

@Phaedrux Cool beans, I had to run it again as the 501 would not be in place until rebooting takes place it failed. But ill run it again. Ambient room temperature is at 35*C now so it will affect the calibration I dont know if i should change anything.

[Gost101]

@Phaedrux It keeps failing

[Phaedrux]

It succeeded once though didn't it? If you use m500 after it completed successfully once the values would be saved to config-override.g. do you see anything in that file?

[Gost101]

@Phaedrux I didn't have m501 in my config file. I sent m500 after I put it in but would not work because the printer said that m501 was not in the config file. So I had to reboot it. And now I can't get it to work.

[dc42]

Are you allowing the bed to cool right down to room temperature before you start the tuning process? That is essential.

[Gost101]

@dc42 indeed.

[droftarts]

@Gost101 M500 saves the results of an autotune (and some other info) to config_override.g in the 'sys' folder on your SD card. An example of config_override.g:

; config-override.g file generated in response to M500 at 2020-09-30 10:19
; This is a system-generated file - do not edit
; Heater model parameters
M307 H0 A215.5 C661.6 D5.8 S1.00 V11.6 B1
M307 H1 A341.8 C144.9 D4.6 S1.00 V12.2 B0
M307 H2 A341.8 C144.9 D4.6 S1.00 V12.2 B0
; Workplace coordinates
G10 L2 P1 X0.00 Y0.00 Z0.00 U0.00
G10 L2 P2 X0.00 Y0.00 Z0.00 U0.00
G10 L2 P3 X0.00 Y0.00 Z0.00 U0.00
G10 L2 P4 X0.00 Y0.00 Z0.00 U0.00
G10 L2 P5 X0.00 Y0.00 Z0.00 U0.00
G10 L2 P6 X0.00 Y0.00 Z0.00 U0.00
G10 L2 P7 X0.00 Y0.00 Z0.00 U0.00
G10 L2 P8 X0.00 Y0.00 Z0.00 U0.00
G10 L2 P9 X0.00 Y0.00 Z0.00 U0.00

You can then:

either open config_override.g, copy the M307 H0 ... line to your config.g, making sure you paste it in after, or in place of, any existing M307 H0 command,

or add M501 to the end of your config.g, which causes it to run config_override.g after config.g.

M500 and M501 are well-documented in the gcode dictionary: https://duet3d.dozuki.com/Wiki/Gcode?revisionid=HEAD#Section_M500_Store_parameters

Ian

[Gost101]

@droftarts Thanks. Also the printer just finished the M303 with another cancelled:

9/30/2020, 3:27:43 AM	Auto tune cancelled because target temperature was not reached
9/30/2020, 2:57:35 AM	Auto tune phase 1, heater on
9/30/2020, 2:57:29 AM	M303 H0 S70
Auto tuning heater 0 using target temperature 70.0°C and PWM 1.00 - do not leave printer unattended
9/30/2020, 2:57:22 AM	M307 H0 A55 C297 D23

[Gost101]

@droftarts Is there a way to ignore the safety's and allow the bed to heat up to 70*C?

[droftarts]

@Gost101 It's going to be very difficult to tune the bed to the maximum temperature it can achieve, because sometimes it gets there, and sometimes it doesn't. There isn't anyway to disable the heater warning, because that would be unsafe. Try tuning to 60C.

Also, have you changed the thermistor setting in config.g to what they actually are? I've just checked the Creality CR10 S5 Marlin firmware source code. Your bed thermistor should be a 100k EPCOS, and so is your hotend as standard. For the hot end, you linked an E3D heater cartridge, not the thermistor! Are you still using the stock thermistor? If so, it's also a 100k EPCOS thermistor. If they are both standard, change these lines in config.g for (slightly) more accurate temperatures:

M308 S0 P"bedtemp" Y"thermistor" T100000 B4092 ; configure sensor 0 as thermistor on pin bedtemp
...
M308 S1 P"e0temp" Y"thermistor" T100000 B4092  ; configure sensor 1 as thermistor on pin e0temp

If you've changed the hot end thermistor, post what it is. Perhaps also post your current config.g.

Ian

[Gost101]

I'm using this e3D thermistor for the hotend and the stock one for the bed. Granted I need to buy a higher temp one for the hotend. link text

[droftarts]

@Gost101 Okay, so that's a Semitec 104NT (a drop-in replacement for the discontinued Semitec 104GT). Change config.g to:

M308 S1 P"e0temp" Y"thermistor" T100000 B4725 C7.06e-8 ; configure sensor 1 as thermistor on pin e0temp

Ian

[Gost101]

@droftarts Tunning for the bed failed again.

[Gost101]

@droftarts Is there a way to increase the time before the heater faults for rising to slowly?