So, i changed the boards and all works perfectly now. Thankyou

Thanks everyone for the detailed explanation. This evening I will replace the board and will give you an update.

Attached is also an image of the toolchanger should it be of interest. Thanks!

@terencemuscat P.s. - I fixed the connector by pushing it back in, no changes in wiring.

Yesterday I had an ongoing print, and the CAN connector loosened and thus the toolboard was loosing and regaining connection. When I noticed this I paused the process and emergency stopped.
I fixed the connector but now I can get no connection via CAN.
I tried a different tool distribution board to no avail

M122 B10/ B121 gives timeout.

M122
=== Diagnostics ===
RepRapFirmware for Duet 3 MB6HC version 3.4.3 (2022-10-05 09:06:36) running on Duet 3 MB6HC v1.01 (SBC mode)
Board ID: 08DJM-9P63L-DJMSS-6J1F0-3S46P-9UFZ8
Used output buffers: 1 of 40 (14 max)
=== RTOS ===
Static ram: 152816
Dynamic ram: 67240 of which 24 recycled
Never used RAM 130592, free system stack 219 words
Tasks: SBC(resourceWait:,0.5%,454) HEAT(notifyWait,0.0%,322) Move(notifyWait,0.0%,351) CanReceiv(notifyWait,0.0%,943) CanSender(notifyWait,0.0%,335) CanClock(delaying,0.0%,334) TMC(notifyWait,7.8%,91) MAIN(running,87.9%,923) IDLE(ready,3.7%,30), total 100.0%
Owned mutexes: HTTP(MAIN)
=== Platform ===
Last reset 00:16:54 ago, cause: power up
Last software reset at 2023-03-18 00:25, reason: User, GCodes spinning, available RAM 130304, slot 2
Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x0044a000 BFAR 0x00000000 SP 0x00000000 Task SBC Freestk 0 n/a
Error status: 0x00
Step timer max interval 134
MCU temperature: min 20.3, current 33.0, max 33.5
Supply voltage: min 23.8, current 24.0, max 24.1, 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 0/0, heap memory allocated/used/recyclable 0/0/0, gc cycles 0
Events: 0 queued, 0 completed
Driver 0: standstill, SG min 0, mspos 8, reads 20547, writes 16 timeouts 0
Driver 1: standstill, SG min 0, mspos 8, reads 20547, writes 16 timeouts 0
Driver 2: standstill, SG min 0, mspos 16, reads 20545, writes 18 timeouts 0
Driver 3: standstill, SG min 0, mspos 8, reads 20547, writes 16 timeouts 0
Driver 4: standstill, SG min 0, mspos 8, reads 20548, writes 16 timeouts 0
Driver 5: standstill, SG min 0, mspos 8, reads 20553, writes 11 timeouts 0
Date/time: 2023-03-18 07:46:34
Slowest loop: 1200.74ms; fastest: 0.04ms
=== Storage ===
Free file entries: 10
SD card 0 not detected, interface speed: 37.5MBytes/sec
SD card longest read time 0.0ms, write time 0.0ms, max retries 0
=== Move ===
DMs created 125, 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 -1 -1 -1 -1 -1 -1 -1 -1, chamber heaters -1 -1 -1 -1, ordering errs 0
=== GCodes ===
Segments left: 0
Movement lock held by 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) 0
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
Code queue is empty
=== CAN ===
Messages queued 9026, received 0, lost 0, boc 2
Longest wait 0ms for reply type 0, peak Tx sync delay 0, free buffers 50 (min 49), ts 5073/0/0
Tx timeouts 0,0,5071,31,0,3918 last cancelled message type 4514 dest 127
=== SBC interface ===
Transfer state: 5, failed transfers: 0, checksum errors: 0
RX/TX seq numbers: 39474/39474
SPI underruns 0, overruns 0
State: 5, disconnects: 0, timeouts: 0 total, 0 by SBC, IAP RAM available 0x2ad10
Buffer RX/TX: 0/0-0, open files: 0
=== Duet Control Server ===
Duet Control Server v3.4.3
Code buffer space: 4096
Configured SPI speed: 8000000Hz, TfrRdy pin glitches: 0
Full transfers per second: 19.20, max time between full transfers: 2212.3ms, max pin wait times: 2400.8ms/18.1ms
Codes per second: 0.04
Maximum length of RX/TX data transfers: 3507/764

@qdeathstar no

@phaedrux same problem with simplify 3D. I noticed it only happens in complicated surfaces, such as rounds.

@t3p3tony Thankyou!

@terencemuscat In addition, I also reduced the speed and the problem is still there. Pausing points are almost in the same place but not exactly, meaning not a problem from the Gcode.

Hello,

I just finished my toolchanger using duet 3 with hemera toolboards. I installed superslicer (latest stable version) and am facing an issue, pausing during printing. I'm trying to print a benchy and im having blops constantly on one side from all the pausing being done during the print. I decreased the processing limit (g1 per second)from 1000 to 150, and the minimum extrusion length up to 0.05 but results remained the same. It's not minimum layer time as I noticed that sometimes it stops multiple times per layer.

Do you know what maybe is the cause?

Thanks,

Terence

So, i changed the boards and all works perfectly now. Thankyou

Thanks everyone for the detailed explanation. This evening I will replace the board and will give you an update.

Attached is also an image of the toolchanger should it be of interest. Thanks!

@dc42 I'm remembering that during assembly I wired + to - and vice versa by mistake, and I heard a popping noise when I switched it on. However I swapped them and powered back on and everything worked (except steppers). Could it be that I fried the drivers?

I will send a picture later today. If I fried them at least I have another 2 I''m not using.