Print issues, is this still retraction?



  • Hi All,

    Sad to be writing this as I thought I had found all the issues, sadly not the case, no matter what i do...I get massive stringing and artefacts in my test parts (see photos).

    Its a lot better than it was, but I now don't know where the problem can be. I'm guessing its a sli3r con fig issue, unless my retraction and pressure advance are way off.

    Sometimes it all looks perfect then something goes wrong. Not sure what.

    Either way...I'm stumped any ideas?

    Best,

    Andy

    0_1549828189972_3D retraction issues.jpg



  • Maybe you are having issues with temperature? try pid tuning lately? get any odd temperature swings?



  • Hi,

    I did not think of that, any suggestions how best to test?

    Best,

    Andy



  • Make sure there is no filiment in the nozzle and the hotend is at room temp, run M303 and configure the temp to the most often used temp, let it run, it will give you feedback, if it looks good throw out an M500 to save the new value. like this; M303 H1 S240 ; auto tune heater 1, default PWM, 240C target or maximum temperature.

    If you get an error about temperature over limit or something to that effect, lower your PWM rate- I have to run mine at 90% to prevent overshoot.

    If that is the case, in config g. under M307, change your S value below 1.0 (100%) Then run again.



  • It looks like under extrusion. Have you calibrated the e steps yet?

    What settings are you actually printing at?



  • Hi there,

    See below for config.g details:

    I'm using the new nozel X which is supposed to be polyphobic...it seems as clean as a whistle when I extrude, its a 0.6mm nozel.

    I am using an e3d set-up: Volcano with Bowden titan extruder.

    ~Config.g~

    ; General preferences
    M111 S0 ; Debugging off
    G21 ; Work in millimetres
    G90 ; Send absolute coordinates...
    M83 ; ...but relative extruder moves
    M555 P1 ; Set firmware compatibility to look like RepRapFirmare
    M665 R155 L397.19 B155 H525 ; Set delta radius, diagonal rod length, printable radius and homed height
    M666 X0 Y0 Z0 ; Put your endstop adjustments here, or let auto calibration find them
    M208 Z0 S1 ; Set minimum Z

    ; Endstops
    M574 X2 Y2 Z2 S1 ; Define active high microswitches
    M558 P1 X0 Y0 Z0 H5 F500 T6000 ; Set Z probe type to unmodulated, the axes for which it is used and the probe + travel speeds
    M557 R150 S30 ; Define mesh grid

    ; BL-Touch
    M307 H3 A-1 C-1 D-1 ; reserve pin 21 for M42 or servo use
    M558 P9 X0 Y0 Z0 H30 F1200 T5000 ;P9 is a key BLTouch Value
    G31 P25 X0 Y0 Z1.5 ; Set Z probe trigger value, offset and trigger height
    M557 R150 S30 ; Define mesh grid

    ; Drives
    M569 P0 S1 ; Drive 0 goes forwards
    M569 P1 S1 ; Drive 1 goes forwards
    M569 P2 S1 ; Drive 2 goes forwards
    M569 P3 S1 ; Drive 3 goes forwards
    M350 E32 I0 ; Configure microstepping without interpolation
    M350 X32 Y32 Z32 I1 ; Configure microstepping with interpolation
    M92 X160 Y160 Z160 E419 ; Set steps per mm
    M566 X1200 Y1200 Z1200 E1200 ; Set maximum instantaneous speed changes (mm/min)
    M203 X2000 Y2000 Z2000 E1500 ; Set maximum speeds (mm/min)
    M201 X1500 Y1500 Z1500 E1500 ; Set accelerations (mm/s^2)
    M906 X1800 Y1800 Z1800 E1500 I30 ; Set motor currents (mA) and motor idle factor in per cent
    M84 S30 ; Set idle timeout

    ; Heaters
    M143 S285 ; Set maximum heater temperature to 285C
    M301 H0 S1.00 P10 I0.1 D200 T0.4 W180 B30 ; Use PID on bed heater (may require further tuning)
    M305 P0 T100000 B4607 C8.950070e-8 R4700 ; Set thermistor + ADC parameters for heater 0
    M305 P1 T100000 B4725 C0 R4700 ; Set thermistor + ADC parameters for heater 1

    ; 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
    M207 S1.5 R1.5 F3000 T3000 Z0.5 ; Set FW retraction length and speed
    M572 D0 S0.01 ; Set pressure advance
    ;Pressure Advance M572 D0 S0.04

    ; Network
    M550 PTEVO Little Monster ; Set machine name
    M540 PBE:EF:DE:AD:FE:ED ; Set MAC address
    M552 P0.0.0.0 S1 ; Enable network and acquire dynamic address via DHCP
    M586 P0 S1 ; Enable HTTP
    M586 P1 S0 ; Disable FTP
    M586 P2 S0 ; Disable Telnet

    ; Fans
    M106 P0 S0 I0 F500 H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
    M106 P1 S0 I0 F500 H-1 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned off
    M106 P2 S0 I0 F500 H-1 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned off

    ; Custom settings are not configured

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



  • When you changed to a 0.6 nozzle did you also update the slicer settings to use a 0.6 extrusion width?

    And as I asked above, did you calibrate your E steps?



  • Yes to slicer, that was a simple one, Esteps? Do you mean steps per mm?

    Best,

    Andy



  • @tef9 yes. If you were using a different sized nozzle before switching to the 0.6 nozzle x the steps per mm for the extruder may be different. You may also need to adjust the filament flow factor in the slicer.

    That could account for the under exteruded look of the parts.



  • What is the extruder? 1500mm/min max speed and 1500mm/sec2 acceleration seems low for a 1.5A stepper?

    Judging by 419 steps per mm on the extrusion axis this is a geared extruder. Should be capable of higher speed and accelerations or these values will restrict the effectiveness of the retractions.

    As others say though, it appears under extruded and occasional PID tunes are worth while. I will now go read up on autotuning as I tend to do it with filament in the hotend!

    Edit: Just seen standard shipment for the Tevo LM is an E3D Titan. dc42 runs with them so may be able to pull acceleration and jerk settings from his recommendations in posts on this forum.



  • I've not used a delta but those acceleration settings seem conservative on the other axis too.



  • Hello,

    Thank you for all the replys - so far I have :

    1. Updated the values for acceleration etc..

    2. Tuned the H1 heater and added the M307 to the config.g

    3. Worked out the steps per and changed it as required in the config.g

    By printing the same part there is a greater density, also the filament is not...shiny when printed? The print on the right is the new print, the print on the left is the same as yesterday.

    Could this be temperature or retraction?

    0_1549920735170_Print2_Retraction issue.jpg

    ; Configuration file for Duet Ethernet (firmware version 1.17)
    ; executed by the firmware on start-up
    ;
    ; generated by RepRapFirmware Configuration Tool on Mon May 22 2017 22:56:20 GMT-0400 (Eastern Daylight Time)

    ; General preferences
    M111 S0 ; Debugging off
    G21 ; Work in millimetres
    G90 ; Send absolute coordinates...
    M83 ; ...but relative extruder moves
    M555 P1 ; Set firmware compatibility to look like RepRapFirmare
    M665 R170 L397.19 B155 H525 ; Set delta radius, diagonal rod length, printable radius and homed height
    M666 X0 Y0 Z0 ; Put your endstop adjustments here, or let auto calibration find them
    M208 Z0 S1 ; Set minimum Z

    ; Endstops
    M574 X2 Y2 Z2 S1 ; Define active high microswitches
    M558 P1 X0 Y0 Z0 H5 F500 T6000 ; Set Z probe type to unmodulated, the axes for which it is used and the probe + travel speeds
    M557 R150 S30 ; Define mesh grid

    ; BL-Touch
    M307 H3 A-1 C-1 D-1 ; reserve pin 21 for M42 or servo use
    M558 P9 X0 Y0 Z0 H30 F1200 T5000 ;P9 is a key BLTouch Value
    G31 P25 X0 Y0 Z1.5 ; Set Z probe trigger value, offset and trigger height
    M557 R150 S30 ; Define mesh grid

    ; Drives
    M569 P0 S1 ; Drive 0 goes forwards
    M569 P1 S1 ; Drive 1 goes forwards
    M569 P2 S1 ; Drive 2 goes forwards
    M569 P3 S1 ; Drive 3 goes forwards
    M350 E32 I0 ; Configure microstepping without interpolation
    M350 X32 Y32 Z32 I1 ; Configure microstepping with interpolation
    M92 X160 Y160 Z160 E842 ; Set steps per mm
    M566 X2000 Y2000 Z2000 E2000 ; Set maximum instantaneous speed changes (mm/min)
    M203 X2500 Y2500 Z2500 E2500 ; Set maximum speeds (mm/min)
    M201 X2500 Y2500 Z2500 E2500 ; Set accelerations (mm/s^2)
    M906 X1800 Y1800 Z1800 E1500 I30 ; Set motor currents (mA) and motor idle factor in per cent
    M84 S30 ; Set idle timeout

    ; Heaters
    M143 S285 ; Set maximum heater temperature to 285C
    M301 H0 S1.00 P10 I0.1 D200 T0.4 W180 B30 ; Use PID on bed heater (may require further tuning)
    M305 P0 T100000 B4607 C8.950070e-8 R4700 ; Set thermistor + ADC parameters for heater 0
    M305 P1 T100000 B4725 C0 R4700 ; Set thermistor + ADC parameters for heater 1
    M307 H1 A330.8 C243.9 D1.8 B0

    ; 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
    M207 S1.5 R1.5 F3000 T3000 Z0.5 ; Set FW retraction length and speed
    M572 D0 S0.01 ; Set pressure advance
    ;Pressure Advance M572 D0 S0.04

    ; Network
    M550 PTEVO Little Monster ; Set machine name
    M540 PBE:EF:DE:AD:FE:ED ; Set MAC address
    M552 P0.0.0.0 S1 ; Enable network and acquire dynamic address via DHCP
    M586 P0 S1 ; Enable HTTP
    M586 P1 S0 ; Disable FTP
    M586 P2 S0 ; Disable Telnet

    ; Fans
    M106 P0 S0 I0 F500 H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
    M106 P1 S0 I0 F500 H-1 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned off
    M106 P2 S0 I0 F500 H-1 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned off

    ; Custom settings are not configured

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

    
    Best,
    
    Andy


  • A 0.6 volcano is going to drool quite a bit, but it looks quite extreme in the photo. Is retraction even turned on in the slicer? Are you using combing? What slicer are you using?



  • Hi,

    I am using Slic3r, I did have retraction set there but it seemed to make more mischief than expected. Should it be set in both firmware and slicer? I can up the firmware setting and try that.

    Best,

    Andy



  • @tef9 said in Print issues, is this still retraction?:

    M350 X32 Y32 Z32 I1

    This does not work on the Duet ethernet. It says so in the Gcode documentation



  • @phaedrux
    I used a .6 volcano exclusively for a couple months and probably 15 lbs of filament.

    I found fast retractions work better around 70mm/s, I really didn't have much of a dribbling issue- this was on a stupid ramps board too.

    I also never used combing and still don't, I just retract on layer change.



  • I'm still stumped and get lines across the part...does the firmware retraction not work?

    Best,

    Andy



  • For firmware retraction to work it has to be enabled in the slicer. It varies between the slicers on how to do this.



  • Opps, did not know that, thought it "just did it" when retracting.
    So now things are looking better 🙂

    Edit, does the firmware limit the retraction? If you have firmware set to 4mm is that the most you can retract?

    Best,

    Andy



  • You can configure retraction completely with the M207 command

    https://duet3d.dozuki.com/Wiki/GCode#Section_M207_Set_retract_length

    You might find this helpful for tuning, especially if you have a PanelDue.
    https://forum.duet3d.com/topic/5993/firmware-retraction-tuning-with-macros


 

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