y slope with 3.5.0-rc1, not seen with 3.4.6

Adrian52

@balajiramani
tried with unfilled cuboids, with 3 perimeter walls :
30x20x20 (x, y, z) - very pronounced y slope, about 1.3mm over the 20mm z height.
20x30x20 - y slope almost gone, but still clearly there; about 0.3mm over 20mm z.
20x20x20 - rechecked this with exactly the same slicing as above, printed consecutively, and it comes out vertical.
What??

Adrian52

@dc42 The problem has definitely returned. For me, the clearest demonstration of the y slope is using a 30x20x20 cube (x,y,z), printed with no fill and no top with 3 perimeters. Strangely, a 20x20x20 cube printed in the same way appears vertical. the 30x20x20 cube printed in vase mode has only a slight slope for me. I have just reverted to 3.4.6, and the same gcode file of 30x20x20 with 3 perimeters prints vertical.

dc42

@Adrian52 please try the firmware build at https://www.dropbox.com/scl/fo/gaxzegafmnmagaefo9mgc/h?rlkey=hk4wpttdje76oews8zkuh86q3&dl=0. It fixes a likely cause of this issue.

Adrian52

--@dc42 thank you - I have tried the new version. Firstly, the y slope seems to have disappeared - excellent.
However, this version does not seem to play well with input shaping as I have it set.
When printing 30x20x20 cuboid with no fill and no top, extruder movement was sporadically irregular, which left little loops here and there on the corners.
The 30x20x20 cuboid with fill and top gave a very strange result - there was a ~1mm -y layer shift at z=7.3mm, with a very slight shift -x. I set IS to none from the console, and the cuboid printed perfectly. When I switched back to ie3 from the console, the cuboid printed with the layer shift at 7.3mm again. With a magnifying glass, the two layer shifted cuboids appear identical.
The other thing I noticed was an occasional graunching noise during the ie3 prints. This was quite brief (1sec?), and irregular, happening at 1- 3 min intervals. Not present when IS off.
I am printing pla on my delta with stand alone duet2wifi at 60mm/sec.

Adrian52

@Adrian52 have revisited jerk settings, and find everything seems to work fine with 300 jerk. 3.5 seems to be much more sensitive to too high jerk.

dc42

@Adrian52 were you using the M593 L parameter? If so, there was a bug in the processing of that parameter in that firmware.

Adrian52

@dc42 I reported the L parameter problem in a separate thread. Currently I find prints look a little better with IS switched off - I suspect a slightly higher L parameter is needed, so looking forward to experimenting with rc2.

Adrian52

The y slope has returned for me using 3.5.rc3+4(from 13th March).
similar to before, with about 1mm overhang on a 20mm high cuboid, sloping in the +y direction. X facing sides are vertical. Similar with filled or unfilled cuboid(I used 30x20x20 xyz). Running a kossel style delta with duet2wifi standalone.

balajiramani

Adding to this, I too am seeing layer shifts with the 3.5.0-rc3+4-mms firmware. In some cases, the problem occurs on the 1st layer itself and the nozzle digs into the bed. Here is a photo that shows it.

gloomyandy

@balajiramani Is your printer a delta? If not I doubt if your problem is the same as this one. You may be better off starting a new thread to discuss your issue.

balajiramani

@gloomyandy Yes, it is a delta.

gloomyandy

@balajiramani Can you post a picture or link of what the print that you had fail (in the photo above) is supposed to look like? I'm trying to work out what happened. Unfortunately I know very little about deltas, but it might be worth you posting your config.g file so that we can take a look at your settings.

balajiramani

@gloomyandy Here is the first layer of the same gcode printer using 3.4.6.

With 3.5.0-rc, the nozzle digs into the bed.

balajiramani

@balajiramani Here is another photo that shows the slope in the y direction.

The one on the left was printed with 3.5.0-rc and the one on the right was printed with 3.4.6.

balajiramani

@balajiramani

Here is my config.g file.

config.g

dc42

@balajiramani please run M122 before you start the print, then post a M122 report taken after layer shifts have occurred. I am interested in whether it shows any step errors. Note, after reporting the step error count the count gets cleared to zero, so if you run M122 again the information will be lost.

Adrian52

@dc42 I am getting a smooth y slope with no hics or step errors printing a 30x20x20 cuboid (filled)

=== Diagnostics ===
RepRapFirmware for Duet 2 WiFi/Ethernet version 3.5.0-rc.3+ (2024-03-18 09:34:21) running on Duet WiFi 1.0 or 1.01
Board ID: 08DAM-999TL-MQ4SD-6J9FD-3SJ6J-K593W
Used output buffers: 2 of 26 (26 max)
=== RTOS ===
Static ram: 23256
Dynamic ram: 72748 of which 12 recycled
Never used RAM 11760, free system stack 120 words
Tasks: NETWORK(1,ready,14.3%,193) HEAT(3,nWait 5,0.1%,319) Move(4,nWait 5,1.7%,258) MAIN(1,running,84.0%,841) IDLE(0,ready,0.0%,29), total 100.0%
Owned mutexes:
=== Platform ===
Last reset 00:37:17 ago, cause: power up
Last software reset at 2024-03-05 21:23, reason: User, Gcodes spinning, available RAM 11272, slot 1
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
MCU temperature: min 20.8, current 27.5, max 34.6
Supply voltage: min 24.1, current 24.4, max 24.6, under voltage events: 0, over voltage events: 0, power good: yes
Heap OK, handles allocated/used 99/0, heap memory allocated/used/recyclable 2048/32/32, gc cycles 0
Events: 0 queued, 0 completed
Driver 0: standstill, SG min 0
Driver 1: standstill, SG min 0
Driver 2: standstill, SG min 0
Driver 3: standstill, SG min 0
Driver 4: standstill, SG min 0
Driver 5: 
Driver 6: 
Driver 7: 
Driver 8: 
Driver 9: 
Driver 10: 
Driver 11: 
Date/time: 2024-03-20 18:38:24
Cache data hit count 4294967295
Slowest loop: 226.78ms; fastest: 0.14ms
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 1.6ms, write time 4.9ms, max retries 0
=== Move ===
DMs created 105, segments created 24, maxWait 487529ms, bed compensation in use: none, height map offset 0.000, max steps late 1, min interval -676, bad calcs 0, ebfmin 0.00, ebfmax 1.00
no step interrupt scheduled
Moves shaped first try 2635, on retry 98, too short 2405, wrong shape 2294, maybepossible 2
=== DDARing 0 ===
Scheduled moves 9392, completed 9392, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 4], CDDA state -1
=== Heat ===
Bed heaters 0 -1 -1 -1, chamber heaters -1 -1 -1 -1, ordering errs 0
=== GCodes ===
Movement locks 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
Q0 segments left 0
Code queue 0 is empty
=== Filament sensors ===
check 5549352 clear 2119357
Extruder 0: pos -9.93, brightness 12, shutter 78, errs: frame 0 parity 0 ovrun 0 pol 0 ovdue 0
=== Network ===
Slowest loop: 207.88ms; fastest: 0.07ms
Responder states: HTTP(0) HTTP(1) HTTP(0) FTP(0) Telnet(0)
HTTP sessions: 1 of 8
=== WiFi ===
Interface state: active
Module is connected to access point 
Failed messages: pending 0, notrdy 0, noresp 0
Firmware version 2.1beta6
MAC address 5c:cf:7f:2c:24:6b
Module reset reason: Turned on by main processor, Vcc 3.38, flash size 2097152, free heap 42972
WiFi IP address 192.168.1.16
Signal strength -57dBm, channel 13, mode 802.11n, reconnections 0
Clock register 00002002
Socket states: 5 0 3 0 0 0 0 0

dc42

@Adrian52 thanks. Please repeat that with input shaping disabled.

Adrian52

@dc42 No y slope with IS disabled

=== Diagnostics ===
RepRapFirmware for Duet 2 WiFi/Ethernet version 3.5.0-rc.3+ (2024-03-18 09:34:21) running on Duet WiFi 1.0 or 1.01
Board ID: 08DAM-999TL-MQ4SD-6J9FD-3SJ6J-K593W
Used output buffers: 16 of 26 (26 max)
=== RTOS ===
Static ram: 23256
Dynamic ram: 72748 of which 12 recycled
Never used RAM 11760, free system stack 120 words
Tasks: NETWORK(2,nWait 6,13.9%,193) HEAT(3,nWait 5,0.1%,307) Move(4,nWait 5,0.9%,258) MAIN(1,running,85.2%,836) IDLE(0,ready,0.0%,29), total 100.0%
Owned mutexes: WiFi(NETWORK)
=== Platform ===
Last reset 01:43:15 ago, cause: power up
Last software reset at 2024-03-05 21:23, reason: User, Gcodes spinning, available RAM 11272, slot 1
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
MCU temperature: min 27.1, current 28.2, max 34.6
Supply voltage: min 24.1, current 24.4, max 24.6, under voltage events: 0, over voltage events: 0, power good: yes
Heap OK, handles allocated/used 99/0, heap memory allocated/used/recyclable 2048/64/64, gc cycles 0
Events: 0 queued, 0 completed
Driver 0: standstill, SG min 0
Driver 1: standstill, SG min 0
Driver 2: standstill, SG min 0
Driver 3: standstill, SG min 0
Driver 4: standstill, SG min 0
Driver 5: 
Driver 6: 
Driver 7: 
Driver 8: 
Driver 9: 
Driver 10: 
Driver 11: 
Date/time: 2024-03-20 19:44:21
Cache data hit count 4294967295
Slowest loop: 221.83ms; fastest: 0.14ms
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 3.5ms, write time 0.0ms, max retries 0
=== Move ===
DMs created 105, segments created 24, maxWait 2378135ms, bed compensation in use: none, height map offset 0.000, max steps late 1, min interval 0, bad calcs 0, ebfmin 0.00, ebfmax 1.00
no step interrupt scheduled
Moves shaped first try 0, on retry 0, too short 0, wrong shape 0, maybepossible 0
=== DDARing 0 ===
Scheduled moves 9392, completed 9392, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 4], CDDA state -1
=== Heat ===
Bed heaters 0 -1 -1 -1, chamber heaters -1 -1 -1 -1, ordering errs 0
=== GCodes ===
Movement locks 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
Q0 segments left 0
Code queue 0 is empty
=== Filament sensors ===
check 10744745 clear 11675643
Extruder 0: pos -0.80, brightness 17, shutter 91, errs: frame 0 parity 0 ovrun 0 pol 0 ovdue 0
=== Network ===
Slowest loop: 212.40ms; fastest: 0.07ms
Responder states: HTTP(0) HTTP(1) HTTP(1) FTP(0) Telnet(0)
HTTP sessions: 1 of 8
=== WiFi ===
Interface state: active
Module is connected to access point 
Failed messages: pending 0, notrdy 0, noresp 0
Firmware version 2.1beta6
MAC address 5c:cf:7f:2c:24:6b
Module reset reason: Turned on by main processor, Vcc 3.38, flash size 2097152, free heap 36260
WiFi IP address 192.168.1.16
Signal strength -54dBm, channel 13, mode 802.11n, reconnections 0
Clock register 00002002
Socket states: 5 0 3 3 0 0 0 0

dc42

@Adrian52 please provide those two GCode files you are printing that exhibit the problem.