First print after upgrading to Duet3d WiFi

briskspirit

@dc42 So I have calibrated pressure advance and got M572 D0 S0.242 , M221 didn't touched yet, non-linear didn't touched either.

Print speed 50mm/s, outline 60%, solid infill 80%, retraction 1mm/s, retraction speed 60mm/s. Layer height 0.2mm, nozzle 0.4mm, extrusion multiplier 100%

Everything is almost ideal except transition seam between start and end points and too much rounded corners(2 black lines on the third photo on the left are shadows from a ringing):

briskspirit

So I decided to check what is wrong... have changed acceleration and max speeds to those calculated and altered jerk values a bit. Have no excessive noise or step skipping. Re-calibrated pressure advance and got these results:

M572 D0 S0.120

print speeds: default 80mm/s, outline 65%, solid infill 65%, movement 150mm/s

And have got very good results with seam(almost not visible), very good quality top infill. But got rippling on both X & Y axis (1mm period) and one very rounded corner(on photo).

; Axis kinematics
M566 X1200 Y1200 Z12 E300:300 ; Set maximum instantaneous speed changes (mm/min)
;TODO: change max speed after changing extruders (https://reprapfirmware.org)
M203 X12000 Y12000 Z600 E12000:12000 ; Set maximum speeds (mm/min) # Max speed before torque drop for X - 15354, Y - 11046
M201 X2000 Y2000 Z50 E3000:3000 ; Set accelerations (mm/s^2) # Max accel for X by calculator 2820, for Y - 2155(estimate as I don't know exact weight)

briskspirit

At 40% of 80mm/s for outlines I am getting less period and less amplitude. (Seems like ~0.8mm)

Edit:
Played with :
M204 P400
M204 P384
M204 P340
M204 P192

Period is changing, but not amplitude... same. But have got nice seam at M204 P192 (can't see it at all!) and rounded corner became less rounded.

dc42

It looks like you got quite bad ringing because the amplitude is dying down very slowly. Check the tightness of the belt that controls the axis perpendicular to the face that exhibits the riging.

You could try the dynamic acceleration adjustment feature in firmware 2.02RC6, see https://duet3d.dozuki.com/Wiki/Gcode#Section_M593_Configure_Dynamic_Acceleration_Adjustment.

briskspirit

@dc42 Both axis are with tight belts for sure, new pulleys and etc... And I don't hear any resonance or other audible problems. Both axis has almost the same ringing problem so I am lost with that problem... Something is flexing too much? Maybe could be the plastic carriage on LM8SUU bearings? I just can't understand what can be so wrong even at 30mm/s to give such a big ringing on both axis..

Or could it be because my belts might be overtightened ? (Sounds like a guitar strings)

dc42

What stepper motors are you using, and what motor currents have you set?

briskspirit

@dc42

X axis: nema 17 40mm 0.9deg stepper with current set at 80%, Y axis nema 17 40mm 1.8deg high impedance stepper with current set at 80%

M906 X1064 Y680 Z1200 E714:714 I30 ;

Full config:

; Configuration file for Duet WiFi
; executed by the firmware on start-up

; General preferences
M111 S0 ; Debug off
G21; Work in millimetres
G90 ; Send absolute coordinates...
M83 ; ...but relative extruder moves
M555 P1 ; Set firmware compatibility to look like RepRapFirmare (P2 for Marlin)
M575 P1 B57600 S1 ; Set auxiliary serial port baud rate and require checksum (for PanelDue)

; Network
M550 PQIDIPro ; Set machine name
M552 S1 ; Enable network
M587 S" " P" " I192.168.1.201 J192.168.1.1 K255.255.255.0 ; Configure access point and IP addresses. You can delete this line once connected
M586 P0 S1 ; Enable HTTP
M586 P1 S0 ; Disable FTP
M586 P2 S0 ; Disable Telnet

; Drives
M569 P0 S1 ; Drive 0 goes forwards
M569 P1 S1 ; Drive 1 goes forwards
M569 P2 S0 ; Drive 2 goes backwards(Z drive)
M569 P3 S1 ; Drive 3 goes forwards(Tool 0)
M569 P4 S0 ; Drive 4 goes backwards(Tool 1)

M350 X16 Y16 Z16 E16:16 I1 S2 ; Configure microstepping without interpolation and Spread Cycle enabled
;16T pulleys
M92 X200 Y100 ; Set steps per mm for X(is 0.9deg stepper) Y(is 1.8deg stepper)
;T8*2 lead screw
M92 Z1600 ; Set steps per mm for Z
;TODO: will be changed to geared 2.75:1 extruder with Bondtech gears and Nema 17 slim stepper
M92 E99:99 ; Set steps per mm for extruders E0 and E1 (Different for PLA and PETG??)

; Axis kinematics
M566 X1200 Y1200 Z12 E2400:2400 ; Set maximum instantaneous speed changes (mm/min)
;TODO: change max speed after changing extruders (https://reprapfirmware.org)
M203 X12000 Y12000 Z600 E12000:12000 ; Set maximum speeds (mm/min) # Max speed before torque drop for X - 15354, Y - 11046
M201 X1000 Y1000 Z50 E1000:1000 ; Set accelerations (mm/s^2) # Max accel for X by calculator 2820, for Y - 2155(estimate as I don't know exact weight)

; Steppers currents
M906 X1064 Y680 Z1200 E714:714 I30 ; Set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout

; Axis Limits
M208 X0 Y0 Z0 S1 ; Set axis minima
M208 X264.5 Y154 Z169 S0 ; Set axis maxima
;M579 X1.001895478 Y1.004419446; Scale axis (Correction factors based on measurment of printed models)


; Endstops
M574 X2 S0 ; Set active low endstop for X
M574 Y2 S0 ; Set active low endstop for Y
M574 Z2 S0 ; Set active low endstop for Z

; Z-Probe
M558 P0 H5 F120 T12000 ; Disable Z probe but set dive height, probe speed and travel speed
M557 X15:249.5 Y15:139 S20 ; Define mesh grid

; Heaters
;Bed
M307 H0 A297.5 C982.3 D0.7 B0 S1.00 ; Disable bang-bang mode for the bed heater and set PWM limit
M305 P0 T100000 B3950 C0 R4700 ; Set thermistor + ADC parameters for heater 0
M143 H0 S110 ; Set temperature limit for heater 0 to 110C

;Extruders
M307 H1 A561.2 C153.0 D9.6 B0 S1.00 ; Disable bang-bang mode for the bed heater and set PWM limit
M305 P1 T100000 B3950 C0 R4700 ; Set thermistor + ADC parameters for heater 1
M143 H1 S310 ; Set temperature limit for heater 1 to 310C (All Metal hotend)

M307 H2 A797.2 C207.2 D8.1 B0 S1.00 ; Disable bang-bang mode for the bed heater and set PWM limit
M305 P2 T100000 B3950 C0 R4700  ; Set thermistor + ADC parameters for heater 2
M143 H2 S260 ; Set temperature limit for heater 2 to 260C

; Fans
; Part cooling
M106 P0 S0 L0 I0 F100 H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off

; Cooling block fans
M106 P1 S1 I0 F25000 H1:2 T45 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on
M106 P2 S1 I0 F25000 H1:2 T45 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned on

; Tools
M563 P0 D0 H1 ; 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
M563 P1 D1 H2 ; Define tool 1
G10 P1 X-34 Y0 Z0 ; Set tool 1 axis offsets
G10 P1 R0 S0 ; Set initial tool 1 active and standby temperatures to 0C

; Automatic power saving
M911 S20 R22 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; Set voltage thresholds and actions to run on power loss

; Custom settings

; Miscellaneous
M501 ; Load saved parameters from non-volatile memory

override:

M572 D0 S0.120

briskspirit

@dc42 any ideas where to dig? Please!

Danal

@briskspirit said in First print after upgrading to Duet3d WiFi:

Or could it be because my belts might be overtightened ? (Sounds like a guitar strings)

I don't know if being too tight causes ringing per se... but it does cause all kinds of other bad things.

"Tight, but not too tight." Yeah, what a load of... anyway... "Guitar string" is definitely too tight. IMNSHO.

dc42

@briskspirit said in First print after upgrading to Duet3d WiFi:

X axis: nema 17 40mm 0.9deg stepper with current set at 80%, Y axis nema 17 40mm 1.8deg high impedance stepper with current set at 80%
...
; Steppers currents

M906 X1064 Y680 Z1200 E714:714 I30 ; Set motor currents (mA) and motor idle factor in per cent

Which motors, exactly? Are you using 12V or 24V power? Your Y axis motor in particular almost certainly needs 24V power, and even then the maximum speed before it loses torque and becomes noisy is likely to be quite low.

briskspirit

@dc42 24V power supply, max speed and acceleration was calculated from your online tools

X stepper JK42HM34-1334
Y stepper 42HB34F08AB-10

briskspirit

@dc42 I saw your answer in topic https://forum.duet3d.com/topic/8223/extruder-smoothness/2

I am using 1.8deg steppers on both extruders with steps per mm = ~100. (X16 microstepping, I1)
Maybe this is what is going on too?
I have two pancake motors with 0.9deg, but they are short/less powerful (waiting for gears to come)

dc42

Is the ringing pattern worse on the X face of the cube, or on the Y face? Whichever face is worse, it's probably the other axis that is ringing.

briskspirit

@dc42 Both axis has that ringing with same period but amplitude is worser on the Y face(so X is ringing with more amplitude)

briskspirit

What can cause almost the same ringing?

briskspirit

So I was a bit angry and furious and crashed my printer )) Some 8mm rods got bent and etc... Long story short: rebuilt my printer with new rods, installed dampers for Y and Z, tightened everything and now at 42mm/s speed I am getting very minimal ringing with very small amplitude(can see barely but can't feel by nail). So rebuilding helped or dampers

dc42

I'm glad you solved it.

The major cause of low-frequency ringing on a well-built machine is likely to be the interaction of the elasticity of the belts and the moving mass. That's why it's generally helpful to keep the moving mass as low as possible.