Solved Missing Steps - Cant Print SpreadCycle StealthChop tuning help

[droftarts]

@carcamerarig in config.g, I comment these lines:

;M550 P"Duet3"													; Set machine name
;M552 S1														; Enable network
;M586 P0 S1														; Enable HTTP
;M586 P1 S0														; Disable FTP
;M586 P2 S0

If you haven’t added the WiFi SSID, connect via USB and follow https://duet3d.dozuki.com/Guide/1.)+Getting+Connected+to+your+Duet/7#s9

Ian

[dc42]

I am trying to catch up with this thread. From what I have read, the main issue is that the motor is making banging/thumping noises when switching between low and high speeds, even when the motor is supposedly running in spreadCycle mode.

Some questions for those affected:

1. Does the problem still occur if you have never changed the M569 settings from the defaults? If you are using stall-detect homing, then to test this you will needs to "pretend home" using G92 instead of homing using stall detection.

2. If you pause the print, then re-send the M569 commands to select spreadCycle, confirm the setting using M122, and then resume the print, does the problem continue?

3. If #2 doesn't help, what happens if you pause the print, send M569 P# V4000 for each axis driver #, and then resume the print: does the problem continue?

One possibility that I am considering is that after switching to stealthChop, switching back to spreadCycle isn't working; although in the test that I have just done, it does work.

[fulg]

@dc42 said in Missing Steps - Cant Print SpreadCycle StealthChop tuning help:

the motor is making banging/thumping noises when switching between low and high speeds, even when the motor is supposedly running in spreadCycle mode.

This is not completely exact. It seems to work fine most of the time (normal moves are well over the default threshold of 2.3mm/s and usually don't have an issue), the problem is that randomly during a print you will hear this "thump" and then realize you now have a layer shift in your print. It behaves exactly like the head has hit something mid-print, yet there is no evidence of any obstruction. It does seem to correspond to a travel move. The behavior is random, restarting the same print may fail at a different point along the way (or not at all).

1. Does the problem still occur if you have never changed the M569 settings from the defaults? If you are using stall-detect homing, then to test this you will needs to "pretend home" using G92 instead of homing using stall detection.

Yes, the problem happens with default M569 values, i.e. M569 P5 S1. I am not using sensorless homing. The problem also occurs by forcing the drivers to stay in spreadCycle mode (M569 D2 ...) or stealthChop mode (M569 V1 ...). I guess I should try M569 V4000 ... too, perhaps just D2 is not enough.

As for your questions #2 and #3, after the problem happens the printer has essentially lost its XY reference due to the skip, so it is hard to continue a print. If I am not next to the printer to stop it, it keeps going fine (but shifted!). I have not let it continue up to a second shift during the same print.

Also note that this happens even with increased motor current, reduced printing & travel speeds and significantly lower instant movement thresholds (everything much slower than my Duet2 settings on the same machine).

So far I've only had the problem happen in one direction on my CoreXY. I don't know if it matters but so far it is always the X motor that skips, as confirmed by G1 H2 X10 moving in the same diagonal. Could be luck of the draw too...

Is there a way to dump out the TMC2209 registers easily? I should build my own version of the firmware to help out.

[ctilley79]

@dc42 Not exactly. The issue is that it thumps in all modes even when explicitly setting the driver to spreadcycle using for example M569 P0 D2 after homing. The thumps seem to be slightly less abrupt in spreadcycle, but still enough to cause layer shifts in the OP’s case.

The thumps occur in stealthchop with no changeover speed, Spreadcycle entirely, and everywhere in between.

[Argo]

@fulg said in Missing Steps - Cant Print SpreadCycle StealthChop tuning help:

For now I am trying another workaround, which is to force stealthChop all the time via M569 ... V1. It is a bit too early to call but so far I am further into a print that has always failed before (I need to slowly remove all my other attempts at working around this issue!). The motors are quite a bit noisier in stealthChop (I would have expected the opposite) but they seem not to stall anymore.

Did you try to set the V parameter to "0"? This should disable hybrid mode. With Marlin I'm also having bangs in hybrid mode with TMC2209s.

[SputnikOC3d]

@dc42 - et al ... I have also given the motor #s of the users involved here to my contact at LDO motors for him to give to his engineering team to review and to compare their motors to their competitors that are both working and not working as well - to see if they have some insight that might help us all resolve.

Not sure if that task will bear fruit - and not holding my breath - but hopeful.

[carcamerarig]

@ctilley79 said in Missing Steps - Cant Print SpreadCycle StealthChop tuning help:

@dc42 Not exactly. The issue is that it thumps in all modes even when explicitly setting the driver to spreadcycle using for example M569 P0 D2 after homing. The thumps seem to be slightly less abrupt in spreadcycle, but still enough to cause layer shifts in the OP’s case.

The thumps occur in stealthchop with no changeover speed, Spreadcycle entirely, and everywhere in between.

@dc42 I’ve just finished a test print in standalone with M569 S0 V0 at very tame speeds and jerk and the issue persists. I’m happy to bring this setup down to you for you to see for yourself??

[fulg]

@argo I can confirm (same as @carcamerarig), the issue persists with M569 ... V0.

This time there was one interesting variation, instead of a "thump" one of the two motors decided to stop working altogether, so I was suddenly printing diagonally. Then the console in DWC was flooded with "short to ground" errors:

Interestingly this was a different motor than the one that is always skipping (in my build drivers 5 and 6 are the A and B of CoreXY). Perhaps I could move A and B to another set of drivers.

I grabbed an M122 dump when this happened in case it's useful:

=== Diagnostics ===
RepRapFirmware for Duet 3 Mini 5+ version 3.3beta2 running on Duet 3 Mini5plus Ethernet (standalone mode)
Board ID: NY57W-W096U-D65J0-40KMU-NP03Z-ZKK2Z
Used output buffers: 3 of 40 (14 max)
=== RTOS ===
Static ram: 99720
Dynamic ram: 108484 of which 176 recycled
Never used RAM 32468, free system stack 119 words
Tasks: NETWORK(ready,207) ETHERNET(notifyWait,550) HEAT(delaying,293) CanReceiv(notifyWait,943) CanSender(notifyWait,358) CanClock(delaying,340) TMC(notifyWait,100) MAIN(running,314) IDLE(ready,20) AIN(delaying,260)
Owned mutexes:
=== Platform ===
Last reset 01:37:52 ago, cause: software
Last software reset at 2021-04-07 16:20, reason: User, GCodes spinning, available RAM 35540, slot 0
Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x00000000 BFAR 0xe000ed38 SP 0x00000000 Task MAIN Freestk 0 n/a
Error status: 0x00
Aux0 errors 0,0,0
Aux1 errors 0,0,0
Supply voltage: min 0.0, current 23.9, max 24.2, under voltage events: 0, over voltage events: 0, power good: yes
Heap OK, handles allocated/used 99/2, heap memory allocated/used/recyclable 2048/82/0, gc cycles 0
Driver 0: position 99200, standstill, SG min/max 0/72, read errors 0, write errors 1, ifcnt 40, reads 15989, writes 18, timeouts 274, DMA errors 0, failedOp 0x41
Driver 1: position 0, standstill, SG min/max 0/100, read errors 0, write errors 1, ifcnt 41, reads 16253, writes 19, timeouts 9, DMA errors 0, failedOp 0x71
Driver 2: position 5114, standstill, SG min/max 0/50, read errors 0, write errors 1, ifcnt 41, reads 15966, writes 19, timeouts 296, DMA errors 0, failedOp 0x71
Driver 3: position 0, standstill, SG min/max 0/60, read errors 0, write errors 1, ifcnt 41, reads 16198, writes 19, timeouts 64, DMA errors 0, failedOp 0x6f
Driver 4: position 0, standstill, SG min/max 0/48, read errors 0, write errors 1, ifcnt 35, reads 16267, writes 13, timeouts 1, DMA errors 0, failedOp 0x06
Driver 5: position 0, standstill, SG min/max 0/510, read errors 0, write errors 1, ifcnt 43, reads 16203, writes 19, timeouts 59, DMA errors 0, failedOp 0x6a
Driver 6: position 0, short-to-ground, standstill, SG min/max 0/510, read errors 0, write errors 1, ifcnt 42, reads 16258, writes 19, timeouts 4, DMA errors 0, failedOp 0x01
Date/time: 2021-04-07 17:58:10
Cache data hit count 4294967295
Slowest loop: 125.41ms; fastest: 0.08ms
=== Storage ===
Free file entries: 9
SD card 0 detected, interface speed: 22.5MBytes/sec
SD card longest read time 100.7ms, write time 30.0ms, max retries 0
=== Move ===
DMs created 83, maxWait 4423638ms, bed compensation in use: mesh, comp offset 0.000
=== MainDDARing ===
Scheduled moves 25385, completed moves 25385, hiccups 0, stepErrors 0, LaErrors 0, Underruns [3, 1369, 0], CDDA state -1
=== AuxDDARing ===
Scheduled moves 0, completed moves 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== Heat ===
Bed heaters = 0 -1, chamberHeaters = -1 -1
Heater 0 is on, I-accum = 0.3
Heater 1 is on, I-accum = 0.4
=== 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 doing "G1 X136.015 Y157.355 E0.04029" 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 52892, send timeouts 52889, received 0, lost 0, longest wait 0ms for reply type 0, peak Tx sync delay 0, free buffers 17 (min 17)
Last cancelled message type 30 dest 127
=== Network ===
Slowest loop: 179.42ms; fastest: 0.03ms
Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0), 0 sessions
HTTP sessions: 1 of 8
- Ethernet -
State: active
Error counts: 0 0 0 0 0
Socket states: 5 2 2 2 2 2 0 0

When I restarted the Mini5+ (via Emergency Stop in DWC) the errors stopped and I restarted the print again, this time the usual skipping happened during the very first travel move of the print so I did not have to wait long.

I have yet to find a particular mode that works. My board is being exchanged via warranty due to an unrelated issue (SD card problems) so I guess we'll see if switching to another board helps; I doubt it will but it's one more data point.

Cheers,
Ben.

[droftarts]

@fulg @carcamerarig Thanks for the feedback. Can you please post your current config.g and a gcode file that causes the skipping/thumping, so I can replicate this on my test bench, as I'm looking at this today.

Ian

[carcamerarig]

@droftarts

Shape-Box_0.2mm_PET_MK3S_1h10m.gcode

Standalone config, sbc config is above.

; General preferences
G90                                         ; Send absolute coordinates...
M83                                         ; ...but relative extruder moves

; Network
M550 P"Duet Caribou 420"                        	; Set machine name
M552 S1                                     	; Enable network
;*** Access point is configured manually via M587
;M586 P0 S1                                  ; Enable HTTP
;M586 P1 S0                                  ; Disable FTP
;M586 P2 S0                                  ; Disable Telnet
M575 P1 S1 B57600							; Panel Due

; Drive Mappings
M569 P0.0 S0 V0                             ; Drive 0: X Axis
M569 P0.1 S0 V0                             ; Drive 1: Y Axis
M569 P0.2 S0 V0                             ; Drive 2:  Z Axis
M569 P0.3 S0 V0                             ; Drive 3: E Axis
M569 P0.4 S0 V0                             ; Drive 4: E1 used for Z1

; Motor remapping for dual Z and axis Limits
M584 X0 Y1 Z2:4 E3				; two Z motors connected to driver outputs Z and E1
M671 X-37:287 Y0:0 S4			; leadscrews at left (connected to Z) and right (connected to E1) of X axis

; Micrpstepping and Speed
M350 X32 Y32 E16 Z16 I1                     ; Configure microstepping with interpolation
M92 X200.00 Y200.00 Z400.00 E830.00         ; Set steps per mm

; Speeds, Acceleration and Jerk
M566 X240.00 Y240.00 Z25.00 E600.00 P1      ; Set maximum instantaneous speed changes (mm/min)
M203 X7500.00 Y7500.00 Z720.00 E1200.00     ; Set maximum speeds (mm/min)
M201 X1500.00 Y1500.00 Z1200.00 E4000.00     ; Set accelerations (mm/s^2)

; Motor currents
M906 X700.00 Y700.00 Z700.00 E700.00 I20    ; Set motor currents (mA) and motor idle factor in percent X,Y,Z=1000/1.414 E=1400/1.414
M84 S30                                     ; Set idle timeout

; Printer geometry
M208 X0:250 Y-4:215 Z-0.5:410               ; Axis Limits
M564 H0							            ; allow unhomed movement

; Endstops for each Axis
M574 X1 S3								 	; Set endstops controlled by motor load detection
M574 Y1 S3                               	; Set endstops controlled by motor load detection

; Stallgaurd Sensitivy
M915 X S-2 F0 H200 R0		                ; Set X axis Sensitivity  
M915 Y S-1 F0 H200 R0		                ; Set y axis Sensitivity 

; Input Shaper
;M593 F58.5 P4 S0.2  ; Input Shaping 3.3/3.4
;M593 F54.26

; Z-Probe Super PINDA
M574 Z1 S2														; Set endstops controlled by probe
M558 P5 C"^io3.in" I1 H1 F500 T4800 A30 S0.004

; Mesh Grid 
M557 X24:221 Y10:195 P8	                         ; Define mesh grid for probing

; Sheets
;G31 P1000 X23 Y5 Z1.730 	                    ; Satin Sheet
G31 P1000 X23 Y5 Z1.91 	  	                  ; Textured Sheet 
;G31 P1000 X23 Y5 Z1.445 					    ; PEI Sheet
;G31 P1000 X23 Y5 Z1.445 					    ; PEI Sheet 0.6 nozzle -10 offset


; Heatbed Heaters and Thermistor Bed 
M308 S0 P"temp0" Y"thermistor" T100000 B4725 C7.060000e-8       ; Set thermistor + ADC parameters for heater 0 Bed
M950 H0 C"out0" T0 Q10					                        ; Creates Bed Heater Qnn PWM frequency in Hz. Valid range: 0-65535, default: 500. (optional) 10hz stopped clicking
M307 H0 R0.273 C345.3 D10.89 S1.00 V23.8						; PID 3.2
M140 H0										                    ; Bed uses Heater 0
M143 H0 S120                                                    ; Set temperature limit for heater 0 to 120C Bed

; HotEnd Heaters and Thermistor HotEnd      
M308 S1 P"temp1" Y"thermistor" T500000 B4725 C1.19622e-7	       	; define E0 temperature sensor e3d
M950 H1 C"out1" T1 						                            ; Create HotEnd Heater
M307 H1 R2.383 C178.5:130.6 D5.32 S1.00 V23.9						; PID
M143 H1 S285                                                    	; Set temperature limit for heater 1 to 285C HotEnd
M302 S185 R185

; Fans
M950 F1 C"out5" Q250				; Creates HOTEND Fan
M106 P1 T45 S235 H1                 ; HOTEND Fan Settings
M950 F0 C"out6" Q100				; Creates PARTS COOLING FAN
M106 P0 H-1                         ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned off PARTS COOLING FAN

; 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

; StealthCop calibration
M17
G4 P150
G1 X1 Y1 Z1 	
G4 S2
M84 ; disable motors

; Filament Sensor Logic
M98 P"0:/macros/02_Functions/StartupFilamentSensorCheck"  ; Runout Sensor Logic: Startup with filament = runout sensor active   Startup without filament = autoload active

[fulg]

@droftarts Here is my config.g.

; Configuration file for Duet3 Mini5+ with Mini2+ expansion (firmware version 3.2.2 or newer)
; executed by the firmware on start-up

; General preferences
M111 S0                     ; Debugging off
G21                         ; Work in millimetres
G90                         ; Send absolute coordinates...
M83                         ; ...but relative extruder moves

M669 K1                     ; Select CoreXY mode
M564 S1 H1                  ; Forbid axis movements when not homed
M918 P2 R6 C30 E-4 F200000  ; Fysetc 12864 display

; Network
M550 PVoron V2.015          ; Set machine name
M552 S1                     ; Enable network
M586 P0 S1                  ; Enable HTTP (for DWC)
M586 P1 S1                  ; Enable FTP (for remote backups)
M586 P2 S0                  ; Disable Telnet

; --- Z Drive map ---
;     _______
;    | 1 | 2 |
;    | ----- |
;    | 0 | 3 |
;     -------
;      front
;
; (looking at the printer from the top)

; Drive directions
M569 P0 S1 ; Z0
M569 P1 S0 ; Z1
M569 P2 S1 ; Z2
M569 P3 S0 ; Z3
M569 P4 S0 ; Extruder
M569 P5 S1 ; A
M569 P6 S0 ; B    TODO I wired one of them backwards of course :(

; Motor mapping and steps per mm
M584 X5 Y6 Z0:1:2:3 E4
M350 X16 Y16 Z16 E16 I1         ; Use 1/16 microstepping with interpolation everywhere
;M92 X80 Y80 Z400               ; Set XYZ steps per mm (1.8deg motors)
M92 X160 Y160 Z800              ; Set XYZ steps per mm (0.9deg motors)
M92 E406                        ; Set Extruder steps per mm

; Drive currents
M906 X1500 Y1500 Z1200 E600     ; XYZ and E current
M906 I30                        ; Idle current percentage
M84 S120                        ; Idle timeout

; Accelerations and speed
M98 P"/macros/print_scripts/speed_printing.g"

; Axis travel limits
M208 X-9 Y0 Z0 S1               ; Set axis minima
M208 X312 Y325 Z275 S0          ; Set axis maxima

; Endstops
M574 X2 S1 P"^!io1.in"          ; Xmax endstop on hall effect board
M574 Y2 S1 P"^!io2.in"          ; Ymax endstop on hall effect board
M574 Z0 P"nil"                  ; No Z endstop

; Z probes
M558 K0 P8 C"^io6.in" T18000 F120 H5 A5 S0.01 R0.2
G31 K0 P500 X0 Y25 Z2.0             ; Don't really care about inductive probe Z offset
M558 K1 P8 C"^io5.in" T18000 F60 H2 A10 S0.005 R0.2
G31 K1 P500 X0 Y0 Z-0.07            ; Z switch offset (if positive, greater value = lower nozzle. if negative, more negative = higher nozzle)

; Bed leveling
M671 X-65:-65:365:365 Y0:395:395:0 S20      ; Define Z belts locations (Front_Left, Back_Left, Back_Right, Front_Right)
M557 X25:275 Y25:275 S25                    ; Define bed mesh grid (inductive probe, positions include the Y offset!)

; Bed heater (dual thermistor setup)
M308 S0 P"temp0" Y"thermistor" T100000 B3950 A"Bed Heater"  ; configure sensor 0 as thermistor on pin temp0 (heater sensor)
M308 S2 P"temp1" Y"thermistor" T100000 B3950 A"Bed Plate"   ; configure sensor 2 as thermistor on pin temp1 (mic6 sensor)
M950 H0 C"out0" T2 Q10                                      ; create bed heater output on out0 and map it to sensor 2 (mic6 sensor). Set PWM frequency to 10Hz
M140 P0 H0                                                  ; Mark heater H0 as bed heater (for DWC)
M143 H0 P1 T0 A2 S115 C0                                    ; Regulate (A2) bed heater (H0) to have pad sensor (T0) below 115°C. Use Heater monitor 1 for it
M143 H0 P2 T0 A1 S125 C0                                    ; Shut off (A1) bed heater (H0) if pad sensor (T0) exceeds 125°C. Use Heater monitor 2 for it
M143 H0 S110                                                ; Set bed heater max temperature to 110°C, use implict monitor 0 which is implicitly configured for heater fault
M307 H0 B0 S0.6                                             ; disable bang-bang mode and set PWM to 60% to avoid warping

; Hotend heater
M308 S1 A"Hotend" P"temp2" Y"pt1000"                        ; Hotend is 2-wire PT1000 on pin temp2
M950 H1 C"out1" T1                                          ; Hotend heater is connected to out1
M307 H1 B0 S1.00                                            ; disable bang-bang mode for heater and set PWM limit
M143 H1 S350                                                ; Set temperature limit for heater 1 to 350C

; MCU sensors
;M308 S3 Y"mcu-temp" A"MCU"
;M308 S4 Y"drivers" A"Duet Drivers"
;M308 S5 Y"drivers-duex" A"Duex Drivers"

; Todo: Chamber temperature sensor via io port (needs RRF3.3b1+)
;M308 S10 P"io4.out+io4.in" Y"dht21" A"Chamber Temp[C]"      ; Set DHT21 for chamber temp

; Fans
M950 F0 C"out3" Q250                ; Create fan 0 (hotend) on pin out3 and set its frequency
M106 P0 S1 H1 T50 C"Hotend"         ; Configure fan 0: Thermostatic control is turned on, based on sensor #1
M950 F1 C"out4" Q250                ; Create fan 1 (cooling) on pin out4 and set its frequency
M106 P1 S0 H-1 C"Cooling"           ; Configure fan 1: Thermostatic control is turned off
M950 F2 C"out5" Q30                 ; Create fan 2 (electronics bay) on pin out5 and set its frequency
;M106 P2 S0.25 H1 T50 C"Bay"         ; Run the fans at 25% if the hotend is over 50C
M106 P2 S0 H-1 C"Bay"               ; (temporary manual setup)
M950 F3 C"out6" Q30                 ; Create fan 3 (chamber) on pin out6 and set its frequency
M106 P3 S1 H2 T50 C"Chamber"        ; Configure fan 3: Thermostatic control is turned on, based on sensor #2 (mic6 temp)
;M106 P3 S0 H-1 C"Chamber"           ; (temporary manual setup)

; LEDs
M950 F4 C"out2"                     ; Create fan 4 (top leds) on pin out2
M106 P4 S255 B0 H-1 C"Top Lights"

; Tools
M563 P0 D0 H1 F1                    ; Define tool 0 using fan 1 for M106
G10 P0 X0 Y0 Z0                     ; Set tool 0 axis offsets
G10 P0 R0 S0                        ; Set initial tool 0 active and standby temperatures to 0C

; Misc
;M572 D0 S0.075                      ; Pressure Advance
M572 D0 S0.01                       ; Pressure Advance
M592 D0 A0.015 B0.0012 L0.2         ; Non-linear extrusion
M376 H10                            ; Fade mesh out compensation over 10mm Z

; DAA tuning (you will need to change this for your slicer)
;M593 F26.6                          ; Cura 4.5 stock profile @ 40mm/s outer printing speed
M593 F42.5                          ; PrusaSlicer @ 40mm/s outer perimeter

M80                                 ; turn on PSU & mains voltage

; set default LCD color
M150 X2 R100 U80 B255 P250 S3

M501                                ; load config-override.g
T0                                  ; select tool 0

I've also attached my complete config + macros and a sample gcode file here: https://www.dropbox.com/sh/wte9u7omvpuif29/AABRm7ewZEVrzH9UWG4pw3mta?dl=0

[droftarts]

@fulg @carcamerarig Thanks, both! Just finishing off wiring up the 5+ in place of my Duet WiFi board (one of the early white PCB beta boards, it's been on the printer a loooong time!)

Ian

[droftarts]

@fulg @carcamerarig I've set up my printer (basically something like a Prusa i3 bedslinger) with settings as close to yours as possible. The basic motor settings are:

; Drives
M569 P0.0 S1 V0                                     ; physical drive 0.0 goes forwards
M569 P0.1 S0 V0                                     ; physical drive 0.1 goes forwards
M569 P0.2 S1 V0                                     ; physical drive 0.2 goes forwards
M569 P0.3 S0 V0                                     ; physical drive 0.3 goes forwards
M569 P0.4 S1 V0                                     ; physical drive 0.3 goes forwards
M584 X0.0 Y0.1 Z0.2:0.4 E0.3                              ; set drive mapping
M350 X16 Y16 Z16 E16 I1                            ; configure microstepping with interpolation
M92 X80.00 Y80.00 Z800.00 E743.50                  ; set steps per mm
M566 X100.00 Y100.00 Z12.00 E300.00                ; set maximum instantaneous speed changes (mm/min)
M203 X18000.00 Y18000.00 Z600.00 E3600.00            ; set maximum speeds (mm/min)
M201 X2000.00 Y2000.00 Z20.00 E600.00                ; set accelerations (mm/s^2)
M906 X1000 Y1000 Z800 E450 I30                          ; set motor currents (mA) and motor idle factor in per cent
M84 S30                                               ; Set idle timeout

I ran a quick test of 100 iterations at full speed (F18000 or 300mm/s) going from X0 Y0 to X200 to Y200 and back. No problems. I then printed (air print, no nozzle or bed heating, no extrusion, but all motors moving) @carcamerarig gcode file, which is a cube and a cylinder. Travel moves are at 80mm/s, where I think you were seeing the problem, but these were okay for me, too.

One thing I've noticed; both of you have your M566 (max instantaneous speed change/jerk) set very low on X and Y. I usually have mine set at the default from the configuration tool, which I regard as pretty conservative, which is:
M566 X900.00 Y900.00 Z12.00 E300.00 (ignore Z and E)
fulg: M566 X100 Y100 Z30 E4000
carcamerarig: M566 X240.00 Y240.00 Z25.00 E600.00 P1
The effect of this is that it may slow down on curves. The sinusoidal fill seemed slow on the air print, but otherwise shouldn't particularly matter.

My only other current observation is that I have a v0.5 Mini 5+. What are your board versions?

I'll should have a little time over the coming days to run some more tests, to try and get it to skip. Any suggestions welcome!

Ian

[carcamerarig]

@droftarts
Not sure on board version I have a Board ID: Z9NZN-A296U-D65J0-40KM4-LY03Z-ZPQPD can you tell from that? Purchased direct from Roland in Jan 21.

In my SBC setup I was at M566 X600 Y600 Ill try at 900 now and report back but I fear it will make it worse...

[carcamerarig]

@droftarts Can you give me your AirPrint gcode file?

[droftarts]

@carcamerarig said in Missing Steps - Cant Print SpreadCycle StealthChop tuning help:

@droftarts Can you give me your AirPrint gcode file?

Sorry, away from machine now. I just commented out the heater commands in the Gcode file, sent M302 P1 to allow cold extrusion, and unloaded filament. It just fits on my 200x200 bed!

Ian

[droftarts]

@carcamerarig said in Missing Steps - Cant Print SpreadCycle StealthChop tuning help:

Not sure on board version

It’s printed on the back of the PCB.

Ian

[fulg]

@droftarts My Mini5+ was a v1.0. I say "was" because it is no longer in my hands, I sent it back for warranty exchange for an unrelated problem. I am getting a replacement in a few days.

The speeds are quite low in order to try and work around this issue, my usual speeds were 6x higher (M566 X600 Y600 Z60 E8000). I saw it with print speeds of 40mm/s and travel speeds of 100mm/s and those very slow instant speeds. Similarly my motor currents are higher than what I usually run.

I see that you are running 1.8° motors (80 steps/mm!), as far as I know everyone affected here is running 0.9° motors.

Cheers,
Ben.

[droftarts]

@fulg said in Missing Steps - Cant Print SpreadCycle StealthChop tuning help:

I see that you are running 1.8° motors

Yes, you’re quite right, I wanted to get a baseline, though @carcamerarig reported the same issue with 1.8 motors. I’ll swap X and Y for 0.9 motors the first chance I have. I don’t have any LDO motors yet, so will have to be Wantai and E3D. Thanks for the info!

Ian

[carcamerarig]

@droftarts

Yep its worse with a higher jerk level but at least you can hear it on the videos now as its been difficult to show/hear with the fans running... It literally shakes everything in and on my cabinet.
While setup on SBC mode I found out one or more of the bigger bangs broke my Y motor holder (cracked it), its replaced now with a spare I had but it can't be good for the printer or the bearings...

A mild travel bang

Infill mini bangs