3D printin issues on a core XY equiped with a duet wifi



  • Dear all,
    For the past 3 days I started printing parts with the 3d printer, and for "first prints" stage , the results looked pretty good. Bellow you have photos of the parts that are been printed successfullyPHOTO-2020-10-18-14-57-46.jpg [0_1603268634442_PHOTO-2020-10-18-14-57-46_2jpg](Uploading 100PHOTO-2020-10-18-14-57-47.jpg %) PHOTO-2020-10-18-14-57-47_4.jpg
    Bellow you have a picture of the failed part:
    PHOTO-2020-10-20-21-49-51_2.jpg PHOTO-2020-10-20-21-49-51_1.jpg PHOTO-2020-10-20-21-49-51.jpg PHOTO-2020-10-20-21-49-51_3.jpg
    The last layer is missplaced by 2.6 mm in both x and y directions ; this happenedat an overall height of the failed part of 1.6 mm ; the layer height was set to 0.2 mm



  • thats a layer shift.

    if you have been printing with your printer for a while check the bearings and do some lubrication.



  • @Veti that has been take care of



  • I started reprinting the part to see when the layer change takes place. I did notice however that at the height of 0.4mm the part started to gain a big blob arount one of the holesIMG_0746H.jpg



  • the nozzle could easily catch on that and cause the layer shift.

    btw what material is that? because the print quality looks very poor



  • @Veti yes, I suspect that too. I am trying however to figure out what can cause that.



  • @campeancalin

    post your config.g



  • @Veti Bellow you have the config.g file:

    ; Configuration file for Duet WiFi (firmware version 3)
    ; executed by the firmware on start-up
    ;
    ; generated by RepRapFirmware Configuration Tool v3.1.4 on Mon Oct 05 2020 11:50:08 GMT+0300 (Eastern European Summer Time)

    ; General preferences
    G90 ; send absolute coordinates...
    M83 ; ...but relative extruder moves
    M550 P"Oscar" ; set printer name
    M669 K1 ; select CoreXY mode

    ; Network
    M551 P"" ; set password
    M552 S1 ; enable network
    M586 P0 S1 ; enable HTTP
    M586 P1 S1 ; enable FTP
    M586 P2 S0 ; disable Telnet

    ; Drives
    M584 X1 Y0 Z2 E3:4 ; set drive mapping; INIT:X=0; Y=1; Z2;E3:4
    M569 P0 S0 ; physical drive 0 goes backwards
    M569 P1 S0 ; physical drive 1 goes backwards
    M569 P2 S1 ; physical drive 2 goes FORWARDS
    M569 P3 S1 ; physical drive 3 goes FORWARDS
    M569 P4 S0 ; physical drive 4 goes backwards

    M350 X16 Y16 Z16:16 E16:16 I1 ; configure microstepping with interpolation ; INIT- M350 X16 Y16 Z16 E16:16 I1
    M92 X160.00 Y160.00 Z3200.00 E843.26:830.8 ; set steps per mm
    M566 X600.00 Y600.00 Z12.00 E120.00:120.00 ; set maximum instantaneous speed changes (mm/min)set x and y to 600 from 900
    M203 X6000.00 Y6000.00 Z360.00 E1200.00:1200.00 ; set maximum speeds (mm/min)
    M201 X250.00 Y250.00 Z20.00 E250.00:250.00 ; set accelerations (mm/s^2)x and y 250 from 500
    M906 X1100 Y1100 Z1200 E1200:1200 I80 ; set motor currents (mA) and motor idle factor in per cent changed X1200 Y1200 to X1100 Y1100
    M84 S30 ; Set idle timeout
    ; Pressure advance
    M572 D0:1 S0.05:0.05 ; enabled Pressure advance for both extruders

    ; Axis Limits
    M208 X0 Y0 Z0 S1 ; set axis minima
    M208 X600 Y600 Z525 S0 ; set axis maxima

    ; Endstops
    M574 X1 S1 P"!xstop" ; configure active-high endstop for low end on X via pin xstop -added "! to xstop"
    M574 Y1 S1 P"!ystop" ; configure active-high endstop for low end on Y via pin ystop - added"! to xstop"
    M574 Z1 S2 ; configure Z-probe endstop for low end on Z

    ; Z-Probe
    M950 S0 C"duex.pwm5" ; create servo pin 0 for BLTouch
    M558 P9 C"^zprobe.in" H5 F120 T6000 ; set Z probe type to bltouch and the dive height + speeds
    G31 P25 X20 Y37 Z2.32 ; set Z probe trigger value, offset and trigger height- changed from 3.5 to 2.19 to -0.797,to 2.23to 2.316
    M557 X40:520 Y80:520 P20 ; define mesh grid changed S20 to P3 to P20

    ; Heaters
    M308 S0 P"bedtemp" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin bedtemp
    M950 H0 C"bedheat" T0 ; create bed heater output on bedheat and map it to sensor 0
    M307 H0 B0 S1.00 ; disable bang-bang mode for the bed heater and set PWM limit
    M140 H0 ; map heated bed to heater 0
    M143 H0 S250 ; set temperature limit for heater 0 to 120C
    M308 S1 P"e0temp" Y"thermistor" T100000 B4138 ; configure sensor 1 as thermistor on pin e0temp
    M950 H1 C"e0heat" T1 ; create nozzle heater output on e0heat and map it to sensor 1
    M307 H1 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit
    M308 S2 P"e1temp" Y"thermistor" T100000 B4138 ; configure sensor 2 as thermistor on pin e1temp
    M950 H2 C"e1heat" T2 ; create nozzle heater output on e1heat and map it to sensor 2
    M307 H2 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit

    ; Fans
    M950 F0 C"fan0" Q500 ; create fan 0 on pin fan0 and set its frequency
    M106 P0 S1 H-1 ; set fan 0 value. Thermostatic control is turned off
    M950 F1 C"fan1" Q500 ; create fan 1 on pin fan1 and set its frequency
    M106 P1 S1 H-1 ; set fan 1 value. Thermostatic control is turned off

    ; Tools
    M563 P0 S"Tool 1" 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
    M563 P1 S"Tool 2" D1 H2 F1 ; define tool 1
    G10 P1 X0 Y0 Z0 ; set tool 1 axis offsets
    G10 P1 R0 S0 ; set initial tool 1 active and standby temperatures to 0C

    ; Custom settings are not defined
    M912 P0 S-16.95 ; adjustment of the MCU temp read

    ; Miscellaneous
    M575 P1 S1 B57600 ; enable support for PanelDue
    M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; set voltage thresholds and actions to run on power loss
    M501 ; load saved parameters from non-volatile memory



  • @campeancalin said in 3D printin issues on a core XY equiped with a duet wifi:

    M308 S0 P"bedtemp" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin
    M308 S1 P"e0temp" Y"thermistor" T100000 B4138 ; configure sensor 1 as thermistor on pin e0temp
    M308 S2 P"e1temp" Y"thermistor" T100000 B4138 ; configure sensor 2 as thermistor on pin e1temp

    your thermistor setting is wrong. look up the correct beta value in your thermistor documentation.
    because of it you are printing at the wrong temperature.

    what material is that you are printing?



  • @Veti ColorFab XTCF20



  • the printheads are 24V E3D V6



  • after changing the B values do I have to redo the PID tunning?



  • @campeancalin said in 3D printin issues on a core XY equiped with a duet wifi:

    the printheads are 24V E3D V6

    if they are genuine e3d then you need 2 values
    B4725 C7.06e-8

    This will account for about 20 degrees difference at 200C

    i would do a pid tune, but the pid value should not change by much.

    btw what nozzle are you using? the carbon filament will destroy a normal brass nozzle and could also account for the blobs you are seeing



  • @Veti It's not a brass nozzle ; reinfoced steel. I plan on having a look at it after it's gone thru a spool of filament.



  • @campeancalin said in 3D printin issues on a core XY equiped with a duet wifi:

    reinfoced steel.

    that is ok for wear, but very bad for temperature transfer.

    f1aef3d2-a169-4801-aa02-f8ceaa604b0f-image.png

    i would suggest that you print a temperature tower.



  • I have a little problem with the PID tunning. Once I've changed the values , it gives me the following error message:

    M307 H1 S285
    

    Error: M307: bad model parameters



  • ; Heaters
    M308 S0 P"bedtemp" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin bedtemp
    M950 H0 C"bedheat" T0 ; create bed heater output on bedheat and map it to sensor 0
    M307 H0 B0 S1.00 ; disable bang-bang mode for the bed heater and set PWM limit
    M140 H0 ; map heated bed to heater 0
    M143 H0 S250 ; set temperature limit for heater 0 to 120C
    M308 S1 P"e0temp" Y"thermistor" T100000 B4725 C7.06e-8 ; configure sensor 1 as thermistor on pin e0temp
    M950 H1 C"e0heat" T1 ; create nozzle heater output on e0heat and map it to sensor 1
    M307 H1 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit
    M308 S2 P"e1temp" Y"thermistor" T100000 B4725 C7.06e-8 ; configure sensor 2 as thermistor on pin e1temp
    M950 H2 C"e1heat" T2 ; create nozzle heater output on e1heat and map it to sensor 2
    M307 H2 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit



  • @campeancalin M303 is used to PID tune, not M307



  • @jay_s_uk Thank you



  • @campeancalin said in 3D printin issues on a core XY equiped with a duet wifi:

    M143 H0 S250 ; set temperature limit for heater 0 to 120C

    can you bed really reach 250C? the bed does not look like the special e3d high temperature bed. and those can reach 250, but should not be operated above 200C



  • @Veti No. I've PID tunned it for a max temp of 100 C



  • @campeancalin PID doesn't set a max temperature, the M143 does.



  • @campeancalin
    Looking at the pictures, either you are over-extruding or your first layer is too low (which means you are trying to fit too much material in too little space). That causes material to push up higher than it should, and if the nozzle runs into those lumps it tends to cause layer shifts.

    And if you don't have one already, get a filament drier, CF filled filaments absorb moisture like crazy and need to be dried. If you look closely you might be able to see the filament bubbling as it comes out of the nozzle. Drying the filament for at least 24 hours will make a huge difference to both print quality and material strength.


  • Moderator

    How many walls are you using? Are you using concentric infill?

    It's typical to use only a few walls and solid or rectilinear infill for the rest. Using too many walls can lead to over extrusion building up.


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