[3.6.0-rc.2] Code 3 move error

MaxGyver

The issue is also present in 3.6.0-rc.1

Error: Code 3 move error: new: start=651528999 overlap=5623 time now=651492690, existing: s=651491803 t=42819 d=20.46 u=8.0975e-4 a=-1.5504e-8 f=18

dc42

@MaxGyver please provide the GCode file that provokes these errors.

MaxGyver

@dc42

Here you go:
LARGE SOFIA LAMPSHADE.gcode

dc42

@MaxGyver thanks, I'll try to reproduce it. We haven't had any other reports of Code 3 errors since we released RC4.

dc42

@MaxGyver not related to the Code 3 errors, but I noticed this in your config.g file:

M205 X8 Y8 Z2 E10                                 ; M205 X5 Y5 Z2 E3 P0                              ; set jerk;M566 X125 Y125 Z60 P0 ;set jerk

M205 and M566 no longer do the same thing with different units in 3.6. M566 sets the machine limits (in mm/min) while M205 sets the limits for the current print, if they are lower than the M566 limits when converted to the same units. See https://github.com/Duet3D/RepRapFirmware/wiki/Changelog-RRF-3.x-RC#upgrade-notes-from-354.

dc42

@MaxGyver I believe I have identified the cause of these errors. If I am right, they only occur when the input shaping frequency is below about 12Hz, which would explain why nobody else has reported Code 3 errors since we released beta4.

Please try the new 3.6.0-rc.2+2 main board firmware binary from https://www.dropbox.com/scl/fo/nlkfneaas1osgtdw37s17/AIS_H0KSAKCmfYSjSRTSOAE?rlkey=ad4omnq36zkdz3wl8i7kthqqt&dl=0. You may keep your expansion board binaries at 3.6.0-rc.2 or upgrade them to rc.2+1 from https://www.dropbox.com/scl/fo/kj7gwwzxg5lhe26twph5z/AAdwkPCTYi6bcogLmIIIup4?rlkey=8oo6z5il7wzk2u5b7qpykf3qv&dl=0.

MaxGyver

@dc42

I finally had a chance to test the latest 3.6.0-rc.3. When the input shaping frequency is set below 12Hz I still have a code 3 movement error always at the same code line early in the first layer. When the IS frequency is >12Hz it is working. I have attached the test pot.gcode file that is causing the error.

Error: Code 3 move error: new: start=335135293 overlap=3753 time now=335099122, existing: s=335096227 t=42819 d=20.49 u=8.1090e-4 a=-1.5526e-8 f=18

M122
=== Diagnostics ===
RepRapFirmware for Duet 3 MB6HC version 3.6.0-rc.3 (2025-04-30 14:43:53) running on Duet 3 MB6HC v1.01 (SBC mode)
Board ID: 0JD2M-999AL-D25S4-7J1D2-3SJ6K-T51V3
Used output buffers: 1 of 40 (19 max)
=== RTOS ===
Static ram: 137420
Dynamic ram: 98720 of which 0 recycled
Never used RAM 107844, free system stack 130 words
Tasks: LASER(5,nWait 7,0.0%,235) SBC(2,nWait 7,1.1%,813) HEAT(3,nWait 6,0.0%,368) Move(4,nWait 6,0.0%,209) TMC(4,nWait 6,3.0%,377) CanReceiv(6,nWait 1,0.1%,792) CanSender(5,nWait 7,0.0%,329) CanClock(7,delaying,0.0%,350) MAIN(1,running,83.7%,500) IDLE(0,ready,12.1%,29) USBD(3,blocked,0.0%,149), total 100.0%
Owned mutexes: HTTP(MAIN)
=== Platform ===
Last reset 00:02:34 ago, cause: software
Last software reset at 2025-05-12 11:06, reason: User, Gcodes spinning, available RAM 82500, slot 1
Software reset code 0x2003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x00400000 BFAR 0x00000000 SP 0x00000000 Task SBC Freestk 0 n/a
Error status: 0x00
MCU temperature: min 33.9, current 34.3, max 35.0
Supply voltage: min 23.4, current 23.5, max 23.6, under voltage events: 0, over voltage events: 0, power good: yes
12V rail voltage: min 12.0, current 12.1, max 12.1, under voltage events: 0
Heap OK, handles allocated/used 99/16, heap memory allocated/used/recyclable 2048/320/52, gc cycles 0
Events: 599 queued, 599 completed
Date/time: 2025-05-12 11:08:41
Slowest loop: 1545.84ms; fastest: 0.07ms
=== Storage ===
Free file entries: 20
SD card 0 not detected, requested/actual speed: 0.0/37.5MBytes/sec
SD card longest read time 0.0ms, write time 0.0ms, max retries 0
=== Move ===
Segments created 3, maxWait 68608ms, bed comp in use: none, height map offset 0.000, hiccups added 0/0 (0.00/0.05ms), max steps late 0, ebfmin 0.00, ebfmax 0.00
Pos req/act/dcf: -464285.00/-463726/-0.50 0.00/0/0.00 804000.00/804000/0.00
Next step interrupt due in 22 ticks, disabled
Driver 0: standstill, SG min n/a, mspos 8, reads 47118, writes 11 timeouts 0
Driver 1: standstill, SG min n/a, mspos 8, reads 47118, writes 11 timeouts 0
Driver 2: standstill, SG min n/a, mspos 8, reads 47118, writes 11 timeouts 0
Driver 3: standstill, SG min n/a, mspos 8, reads 47118, writes 11 timeouts 0
Driver 4: standstill, SG min n/a, mspos 8, reads 47118, writes 11 timeouts 0
Driver 5: standstill, SG min n/a, mspos 8, reads 47118, writes 11 timeouts 0
Phase step loop runtime (us): min=0, max=40, frequency (Hz): min=1744, max=2358
=== DDARing 0 ===
Scheduled moves 6, completed 5, LaErrors 0, Underruns [0, 0, 0]
Segments left 0, axes/extruders owned 0x80000007, drives owned 0x80000007
Code queue is empty
=== DDARing 1 ===
Scheduled moves 0, completed 0, LaErrors 0, Underruns [0, 0, 0]
Segments left 0, axes/extruders owned 0x00000000, drives owned 0x00000000
Code queue is empty
=== Heat ===
Bed heaters -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1, chamber heaters 2 -1 -1 -1 -1 -1 -1 -1, ordering errs 0
Heater 0 is on, I-accum = 0.0
Heater 1 is on, I-accum = 0.0
=== GCodes ===
Movement locks held by Trigger, null
HTTP* is doing "M122" 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) 2 0 5 0, running macro
Queue is idle in state(s) 0
LCD is idle in state(s) 0
SBC is idle in state(s) 0
Daemon is idle in state(s) 0
Aux2 is idle in state(s) 0
Autopause is idle in state(s) 0
File2 is idle in state(s) 0
Queue2 is idle in state(s) 0
=== Filament sensors ===
Driver 31: no filament
=== CAN ===
Messages queued 1431, received 9757, lost 0, ignored 0, errs 0, boc 0
Longest wait 4ms for reply type 6061, peak Tx sync delay 379, free buffers 50 (min 49), ts 734/733/0
Tx timeouts 0,0,0,0,0,0
=== SBC interface ===
Transfer state: 5, failed transfers: 0, checksum errors: 0
RX/TX seq numbers: 6084/6084
SPI underruns 0, overruns 0
State: 5, disconnects: 0, timeouts: 0 total, 0 by SBC, IAP RAM available 0x27a24
Buffer RX/TX: 208/256-0, open files: 0
=== Duet Control Server ===
Duet Control Server version 3.6.0-rc.3 (2025-04-30 10:29:48, 64-bit)
HTTP+Executed:
> Executing M122
Trigger:
Buffered code: G1 H1 X-1205 F{global.homingspeed/2} ; move slowly to X axis endstop once more (second pass)
Buffered code: G90 ; absolute positioning
Buffered codes: 96 bytes total
>> Doing macro trigger2.g, started by system
>>> Doing macro homeall.g, started by G28
>>> Suspended code: M98 P"homey.g"
>>>> Doing macro homex.g, started by M98 P"homex.g"
Code buffer space: 3840
Configured SPI speed: 8000000Hz, TfrRdy pin glitches: 0
Full transfers per second: 40.77, max time between full transfers: 1750.1ms, max pin wait times: 39.5ms/4.0ms
Codes per second: 0.71
Maximum length of RX/TX data transfers: 4468/904

dc42

@MaxGyver thanks for your report. When that error was reported, did you still have input shaping set to 8.7Hz EI3 in config.g?

MaxGyver

@dc42 Yes, Input shaping was Set to 8.7Hz EI3.

dc42

@MaxGyver thanks.

I found a bug in the previous fix. Please try the 6HC build from https://www.dropbox.com/scl/fo/dumsdufoej44q97ek9joo/AIBRnU-wtKfMrbWPzZwH_XY?rlkey=idmyinvvcuiwmycbb1l2obz38&dl=0.