Help troubleshooting after upgrade to RRF3 (sensorless homing)
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Hi Folks,
After upgrading to the RRF3, one of my printers is doing something weird. It is a cartesian printer with steel frame and I set it up to work sensorless, which after a lot of trial and error turned out to work very good. However, after upgrading to RRF3 sometimes the Y homing does not get triggered. It seems to be quite random, sometimes it works and some other times it doesn't. Here is my homey.g and homeall.g. The issue pops up in both of them.
homey.g
; homey.g ; called to home the Y axis G91 ; set relative mode G1 H2 Y0.2 ; Move Y by 0.2 mm, clear stall status G29 S2 ; to clear the height map before Z homing M561 ; reset bed compensation M400 ; make sure everything has stopped before we make changes M913 Y75 ; Y motor % current M915 Y S3 R0 F0 ; set X sensitivity, do nothing when stall, unfiltered G1 H2 Z5 F1200 ; lift Z G1 H1 Y-260 F3600 ; move X back, stopping at the end stop M400 ; make sure everything has stopped M913 Y100 ; XY motors to 100% current M915 Y S30 R0 F0 ; set Y sensitivity high, pause when stall, filtered G1 H2 Z-5 F1200 ; reset z G90 ; back to absolute modehomeall.g
; homeall.g ; called to home all axes G91 ; set relative mode G1 H2 Z5 F1200 ; lift Z G29 S2 ; to clear the height map before Z homing M561 ;reset bed compensation ; homex.g G1 H2 X0.2 ; Move X by 0.2 mm, clear stall status M400 ; make sure everything has stopped before we make changes M913 X70 ; X motor % current M915 X S2 R0 F0 ; set X sensitivity, do nothing when stall, unfiltered ;M574 X1 S3 ; set endstops to use motor stall G1 H1 X-260 F3600 ; move X back, stopping at the end stop M400 ; make sure everything has stopped M913 X100 ; XY motors to 100% current M915 X S30 R0 F0 ; set X sensitivity high, do nothing when stall, unfiltered M400; ; make sure everything has stopped ; homey.g G1 H2 Y0.2 ; Move Y by 0.2 mm, clear stall status M913 Y75 ; Y motor % current M915 Y S3 R0 F0 ; set X sensitivity, do nothing when stall, unfiltered ;M574 Y S3 ; set endstops to use motor stall G1 H1 Y-260 F3600 ; move X back, stopping at the end stop M400 ; make sure everything has stopped M913 Y100 ; XY motors to 100% current M915 Y S30 R0 F0 ; set Y sensitivity high, pause when stall, filtered M400 ; make sure everything has stopped ;homez.g G90 ; absolute positioning G1 X110 Y110 F6000 ; go to first probe point G30 ; home Z by probing the bedAny help would be much appreciated. Thanks in advance!
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Can you post your config.g as well?
Can you try a higher homing speed than 3600?
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@Phaedrux config.g is as follows
; Configuration file for Duet WiFi (firmware version 3.11) ; executed by the firmware on start-up ; ; generated by RepRapFirmware Configuration Tool on Mon Feb 04 2019 17:03:09 GMT+0100 (Central European Standard Time) ; General preferences G90 ; Send absolute coordinates... M83 ; ...but relative extruder moves ;Panel Due Setup M575 P1 B57600 S1 ; Network M550 P"Steel" ; Set machine name M552 S1 ; Enable network M586 P0 S1 ; Enable HTTP M586 P1 S0 ; Disable FTP M586 P2 S0 ; Disable Telnet ; Drives M569 P0 S0 ; Drive 0 goes backwards M569 P1 S0 ; Drive 1 goes backwards M569 P2 S1 ; Drive 2 goes forwards M569 P3 S0 ; Drive 3 goes backwards M350 X16 Y16 Z16 E16 I1 ; Configure microstepping with interpolation M92 X80.00 Y80.00 Z400.00 E428.7 ; Set steps per mm M566 X600.00 Y600.00 Z18.00 E300.00 ; Set maximum instantaneous speed changes (mm/min) M203 X6000.00 Y6000.00 Z480.00 E3600.00 ; Set maximum speeds (mm/min) M201 X1500.00 Y1500.00 Z100.00 E10000.00 ; Set accelerations (mm/s^2) M906 X650.00 Y800.00 Z800.00 E800.00 I30 ; Set motor currents (mA) and motor idle factor in per cent M84 S30 ; Axis Limits M208 X-20.8 Y-26.0 Z0 S1 ; Set axis minima M208 X220 Y220 Z200 S0 ; Set axis maxima ; Endstops M574 X1 S3 ; Motor Stall X Endstop M574 Y1 S3 ;M574 Y1 S3 ; Motor Stall Y Endstop M915 X Y S30 F0 R0 ; Stall guard config when not homing M574 Z1 S2 ; Set endstops controlled by probe M558 P5 C"!zprobe.in" I1 H5 F300 T6000 ; Set Z probe type to switch and the dive height + speeds G31 P500 X-25 Y7 Z1.28 ; Set Z probe trigger value, offset and trigger height ; The larger the number the closest it gets to the bed ; i.e. 1.50 puts the nozzle closer to the bed than 1.20 M557 X40:210 Y5:190 S20 ; Define mesh grid ; Bed Heaters/Thermistors M308 S0 P"bedtemp" Y"thermistor" T100000 B4092 C0 R4700 ; Define thermistor M950 H0 C"bedheat" T0 ; Link pin name with heater M307 H0 B0 S1.00 ; Disable bang-bang mode for the bed heater and set PWM limit M140 H0 ; Links everything on the GUI M143 H0 S95 ; Set temperature limit for heater 0 to 95C ; HotEnd Heaters/Thermistors M308 S1 P"e0temp" Y"thermistor" T100000 B4725 C7.06e-8 R4725 ; Define thermistor M950 H1 C"e0heat" T1 ; Link pin name with heater M143 H1 S290 ; Set temperature limit for heater 1 to 290C ; Bed / HotEnd Autotunes M307 H1 A667 C208.6 D8.1 V24.2 B0 ; Hotend Autotune //Changed M307 H0 A165 C313.5 D1.2 V0.0 ; Bed Autotune //Changed. Silicone heated bed. ; Fans M950 F0 C"fan0" Q500 M106 P0 S0 H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off M950 F1 C"fan1" Q500 M106 P1 S1 H1 T45 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on ; Tools M563 P0 D0 H1 ; 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 ; Automatic power saving M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; Set voltage thresholds and actions to run on power loss ; Custom settings are not configured T0I tried F4800 for the Y homing speed and worked just fine...
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@FelixH said in Help troubleshooting after upgrade to RRF3 (sensorless homing):
I tried F4800 for the Y homing speed and worked just fine...
So it's working more consistently now with a higher speed?
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@Phaedrux I just tried once because I have to print some parts wiht this printe. Tomorrow I will investigate further on this direction. Do you thing it has something to do with the homing speed?
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Well tall detection requires a certain amount of speed to be able to detect a stall correctly.
It can be calculated https://duet3d.dozuki.com/Wiki/Stall_detection_and_sensorless_homing#Section_Minimum_recommended_speed_for_stall_detection
But if it's occasionally not triggering it could be on the verge of too slow.
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@Phaedrux somehow the dimensions on that formula do not seem right, but I might be missing something probably... anyway, thanks for the pointer. Curious how this showed up just after the upgrade...
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So, the printer has undergone several Y-homings since I changed the speed and has suffered 0 fails, so I would say the issue is solved. Thanks again!
