Update: I finally got around to playing with this to figure it out.
The changes I made:
I lowered the acceleration by a factor of 10. I may increase it again later but for now things are working.
I increased the x/y homing speed to F6000. at 3600 it kept grinding on the stop.
I got rid of the repeat of the home. Once is good enough anyway, no need to do it twice.
Update: I finally got around to playing with this to figure it out.
The changes I made:
I lowered the acceleration by a factor of 10. I may increase it again later but for now things are working.
I increased the x/y homing speed to F6000. at 3600 it kept grinding on the stop.
I got rid of the repeat of the home. Once is good enough anyway, no need to do it twice.
@Phaedrux oh geez it is very high. Huh. I can't believe I didn't catch that, that's from a test I did ages ago.
Motor testing has confirmed the motors move correctly. I also checked the wires to make sure they were pinned right, because I had an incident with a motor once that had two wires swapped. That's not the case here.
I'll spend today playing with things with the kinematics turned way down, see if that helps.
@Phaedrux said in CoreXY sometimes homes correctly, sometimes does its own thing:
@Rorgaard said in CoreXY sometimes homes correctly, sometimes does its own thing:
it'll home X/Y to the middle of the bed
Sounds like your stall detection isn't tuned very well and it's having false triggers?
Have you been through these guides?
https://docs.duet3d.com/en/User_manual/Machine_configuration/Configuration_coreXY
https://docs.duet3d.com/en/User_manual/Connecting_hardware/Sensors_stall_detection
I have, and I thought about playing with the sensitivity but the fact that the motors occasionally run backward made me think the sensitivity might not be the root cause.
@Phaedrux said in CoreXY sometimes homes correctly, sometimes does its own thing:
Post your full config.g please
Also the results of M122 and M98 P"config.g"
; Configuration file for Duet WiFi (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.1.4 on Fri Oct 09 2020 19:49:58 GMT-0500 (Central Daylight Time)
; Using LGX Lite direct drive extruder
; General preferences
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"Beast" ; set printer name
M669 K1 ; select CoreXY mode
; Network
M551 P"Beast" ; set password
M552 S1 ; enable network
M586 P0 S1 ; enable HTTP
M586 P1 S0 ; disable FTP
M586 P2 S0 ; disable Telnet
; Drives
M569 P0 S0 ; physical drive 0 goes forwards (X)
M569 P1 S0 ; physical drive 1 goes forwards (Y)
M569 P2 S1 ; physical drive 2 goes forwards (Z1)
M569 P4 S1 ; physical drive 4 goes forwards (Z2)
M569 P3 S1 ; physical drive 3 goes forwards (E)
M584 X0 Y1 Z2:4 E3 ; set drive mapping
M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation
M92 X80.00 Y80.00 Z400.00 E562 ; set steps per mm (E562 for Bondtech LGX Lite)
M203 X12000.00 Y12000.00 Z1000.00 E6000.00 ; set maximum velocity (mm/min) (Velocity)
M201 X7500.00 Y7500.00 Z500.00 E5000.00 ; set maximum accelerations (mm/s^2) (Accel) (5000)
M566 X750.00 Y750.00 Z60.00 E750.00 ; set maximum jerk (mm/min) (was 150xy 60z 120e) (500)
M906 X1000 Y1000 Z800 E650 I30 ; set motor currents (mA) and motor idle factor in per cent (LGX Lite 650 start from E800)
M84 S30 ; Set idle timeout
; Axis Limits
M208 X0 Y0 Z0 S1 ; set axis minima
M208 X330 Y320 Z350 S0 ; set axis maxima
; Dual Z stuff
M671 X-45:375 Y0:0 S1.0 ; Says there's z screws 45mm left of x axis and 45mm right of end, max adjustment is 1mm
; Endstops
M574 X1 S4 ; configure sensorless endstop for low end on X
M574 Y1 S4 ; configure sensorless endstop for low end on Y
M574 Z1 S2 ; Define Z to use Probe. Home to min.
M915 X Y R0 F0 ; added 2/17/23
; Z-Probe
M950 S0 C"exp.heater3" ; Supposedly works, from duet gcode file
M558 P9 C"zprobe.in" H1.5 F500 T6000 ; Enable Z probe, set dive height, probe speed and travel speed
G31 P500 X0 Y50 Z2.3 ; Z probe trigger value, offset in relation to nozzle. Trigger height adjust. (40.75) (3.21)(2.57)(4.95)
M557 X0:320 Y40:320 S20 ; define mesh grid
; Heaters
M308 S0 P"bedtemp" Y"thermistor" A"Bed" T100000 B4138 ; configure sensor 0 as thermistor on pin bedtemp (R4700)
M950 H0 C"bedheat" T0 ; create bed heater output on bedheat and map it to sensor 0 q=10hz (Q10)
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 S150 ; set temperature limit for heater 0 to 150C
M308 S1 P"e0temp" Y"thermistor" A"Hotend" T100000 B4680 C6.427137e-8 ; configure sensor 1 as thermistor on pin e0temp (use RRF configurator for TBC values)
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 S300 ; set temperature limit for heater 1 to 300c
; Fans
M950 F0 C"fan0" Q500 ; create fan 0 on pin fan0 and set its frequency
M106 P0 S0 H-1 T50 ; set fan 0 value. Thermostatic control is turned off, cuts at 50C
M950 F1 C"fan1" Q500 ; create fan 1 on pin fan1 and set its frequency
M106 P1 S1 H1 T50 ; set fan 1 value. Thermostatic control is turned on, 50C
M950 F2 C"fan2" Q500 ; create fan 1 on pin fan1 and set its frequency
M106 P2 S1 H1 T30 ; set fan 2 value. Thermostatic control is turned on, 30C
; Tools
M563 P0 D0 H1 F0 ; 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 are not defined
; Miscellaneous
T0 ; selects tool0 at startup (extruder)
;M571 P1 57600
M575 P1 S1 B57600 ; PanelDue stuff
M501 ; Use stored PID settings
M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; set voltage thresholds and actions to run on power loss
M122:
M122
=== Diagnostics ===
RepRapFirmware for Duet 2 WiFi/Ethernet version 3.4.5 (2022-11-30 19:36:12) running on Duet WiFi 1.02 or later
Board ID: 08DJM-9178L-L2MSD-6J1F4-3S06L-99FQP
Used output buffers: 1 of 26 (18 max)
=== RTOS ===
Static ram: 23836
Dynamic ram: 75256 of which 12 recycled
Never used RAM 12976, free system stack 184 words
Tasks: NETWORK(notifyWait,14.7%,242) HEAT(notifyWait,0.0%,333) Move(notifyWait,0.0%,363) MAIN(running,84.6%,438) IDLE(ready,0.7%,30), total 100.0%
Owned mutexes: WiFi(NETWORK)
=== Platform ===
Last reset 00:02:23 ago, cause: power up
Last software reset at 2023-02-17 16:17, reason: User, GCodes spinning, available RAM 15024, slot 0
Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x0041f000 BFAR 0xe000ed38 SP 0x00000000 Task MAIN Freestk 0 n/a
Error status: 0x00
Aux0 errors 0,0,0
Step timer max interval 0
MCU temperature: min 25.5, current 32.4, max 32.5
Supply voltage: min 24.1, current 24.2, max 24.3, under voltage events: 0, over voltage events: 0, power good: yes
Heap OK, handles allocated/used 0/0, heap memory allocated/used/recyclable 0/0/0, gc cycles 0
Events: 0 queued, 0 completed
Driver 0: standstill, SG min n/a
Driver 1: standstill, SG min n/a
Driver 2: standstill, SG min n/a
Driver 3: standstill, SG min n/a
Driver 4: standstill, SG min n/a
Driver 5:
Driver 6:
Driver 7:
Driver 8:
Driver 9:
Driver 10:
Driver 11:
Date/time: 2023-02-27 16:49:39
Cache data hit count 4294967295
Slowest loop: 8.07ms; fastest: 0.18ms
I2C nak errors 0, send timeouts 0, receive timeouts 0, finishTimeouts 0, resets 0
=== Storage ===
Free file entries: 10
SD card 0 detected, interface speed: 20.0MBytes/sec
SD card longest read time 3.8ms, write time 0.0ms, max retries 0
=== Move ===
DMs created 83, segments created 0, maxWait 0ms, bed compensation in use: none, comp offset 0.000
=== MainDDARing ===
Scheduled moves 0, completed 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== AuxDDARing ===
Scheduled moves 0, completed 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== Heat ===
Bed heaters 0 -1 -1 -1, chamber heaters -1 -1 -1 -1, ordering errs 0
Heater 1 is on, I-accum = 0.0
=== GCodes ===
Segments left: 0
Movement lock held by null
HTTP is idle in state(s) 0
Telnet is idle in state(s) 0
File is idle in state(s) 0
USB is idle in state(s) 0
Aux is idle in state(s) 0
Trigger is idle in state(s) 0
Queue is idle in state(s) 0
LCD is idle in state(s) 0
Daemon is idle in state(s) 0
Autopause is idle in state(s) 0
Code queue is empty
=== Network ===
Slowest loop: 16.09ms; fastest: 0.00ms
Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0)
HTTP sessions: 1 of 8
= WiFi =
Network state is active
WiFi module is connected to access point
Failed messages: pending 0, notready 0, noresp 0
WiFi firmware version 1.27
WiFi MAC address 84:0d:8e:b2:ef:82
WiFi Vcc 3.34, reset reason Turned on by main processor
WiFi flash size 4194304, free heap 24600
WiFi IP address 10.0.0.12
WiFi signal strength -31dBm, mode 802.11n, reconnections 0, sleep mode modem
Clock register 00002002
Socket states: 0 0 0 0 0 0 0 0
M98 P"config.g":
M98 P"config.g"
HTTP is enabled on port 80
FTP is disabled
TELNET is disabled
Warning: Heater 1 predicted maximum temperature at full power is 492°C
I have a Duet 2 wifi controlled custom CoreXY machine that I built during the pandemic. I managed to get it set up and running okay, but there's a few oddities that I've been unable to figure out. The most important one keeping me from moving on to fine-tuning, is that occasionally I will try to home it and it not only doesn't utilize the sensorless homing right, it'll home X/Y to the middle of the bed, or try to home to the opposite corner (max X and max Y instead of 0:0).
Here's my homeall file text:
; Home X/Y first
M564 H0 S0 ; disables soft endstops
G91 ; relative positioning
M915 X Y R0 F0 ; Set M915 for sensorless homing
M400 ; make sure everything has stopped before we make changes
M913 X100 Y100 ; drops motor current to 70% (currently 100%, trying to fix homing issue)
M400 ; wait
G91 ; relative positioning
G1 H2 Z10 F6000 ; lower z relative to current position
M400 ; wait
;X axis
G1 H1 X-325 F5000 ; home x
G1 H2 X10 F3600 ; move away a bit
G1 H1 X-20 F3600 ; home again but slower
G1 H1 X5 ; sit at 5mm
M400 ; wait
;Y axis
G1 H1 Y-325 F5000 ; home y
G1 H2 Y10 F3600 ; move away a bit
G1 H1 Y-20 F3600 ; home again but slower
G1 H1 Y5 ; sit at 5mm
M400 ; wait
; Move probe for Z homing
G90 ; absolute positioning
G1 X168.5 Y155 F10000 ; Move to the center of the bed
M558 F500 ; Set the probing speed
G30 ; Probe bed
M558 F50 ; Set a slower probing speed
G30 ; Do it again
G30 P0 X0 Y195 Z-99999 ; Probe near left endscrew
G30 P1 X330 Y195 Z-99999 S2 ; Probe near right endscrew, set compensation
;check center again for accurate zeroing
G1 X167 Y155 F10000 ; Move to the center of the bed
M558 F500 ; Set the probing speed
G30 ; Probe bed
M558 F50 ; Set a slower probing speed
G30 ; Do it again
G1 X1 Y1 F5500 ; Go back home
M915 X Y S3 R1 F1 ; set M915 for stall detection
Apologies for the comments not aligning, they're right on my browser but not when pasted here.
What am I missing?