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Calibration cube corners.

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Tuning and tweaking
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  • undefined
    vapvap
    last edited by vapvap 19 Aug 2018, 17:46

    When I printing a calibration cube (ABS filament), its angles are strongly "twisted".
    Please, tell me how to deal with this?

    (The printer is "Anycubic Linear Plus" (Delta)(Duet WiFi)).

    ABS filament

    1 Reply Last reply Reply Quote 0
    • undefined
      dc42 administrators
      last edited by 20 Aug 2018, 13:27

      I don't often print with ABS, but my guess is that you are printing the corners too fast or at too high a temperature.

      Duet WiFi hardware designer and firmware engineer
      Please do not ask me for Duet support via PM or email, use the forum
      http://www.escher3d.com, https://miscsolutions.wordpress.com

      undefined 1 Reply Last reply 21 Aug 2018, 00:42 Reply Quote 0
      • undefined
        vapvap @dc42
        last edited by 21 Aug 2018, 00:42

        @dc42 Unfortunately no. It is printed slowly (more than 20 min.), The temperature is calibrated too.
        I do not even know now where to start to fix this ...?

        undefined undefined 2 Replies Last reply 21 Aug 2018, 06:01 Reply Quote 0
        • undefined
          OBELIKS @vapvap
          last edited by 21 Aug 2018, 06:01

          @vapvap Post your config.g, then people will be able to help you

          P3Steel Toolson mk2 - Duet 2 WiFi --> RatRig V-Core with Duet WiFi 1.03
          Original Prusa i3 MK3S

          undefined 1 Reply Last reply 21 Aug 2018, 21:46 Reply Quote 0
          • undefined
            dc42 administrators @vapvap
            last edited by 21 Aug 2018, 07:22

            @vapvap said in Calibration cube corners.:

            @dc42 Unfortunately no. It is printed slowly (more than 20 min.), The temperature is calibrated too.
            I do not even know now where to start to fix this ...?

            Have you tried reducing the extrusion temperature by 5C ?

            Duet WiFi hardware designer and firmware engineer
            Please do not ask me for Duet support via PM or email, use the forum
            http://www.escher3d.com, https://miscsolutions.wordpress.com

            undefined 1 Reply Last reply 21 Aug 2018, 21:44 Reply Quote 0
            • undefined
              RCarlyle
              last edited by 21 Aug 2018, 15:21

              In addition to temperature suggestions, I would look for carriage backlash or loose arm joints. (Start grabbing parts and wiggling them to feel for play.) At least one delta column will be changing direction at a 90 degree turn like this.

              On the temperature standpoint, either add a little bit of fan airflow or print a much larger object (like 80mm box) to give the fresh material more time to cool before the next nozzle pass.

              undefined 1 Reply Last reply 21 Aug 2018, 21:38 Reply Quote 1
              • undefined
                vapvap @RCarlyle
                last edited by 21 Aug 2018, 21:38

                @rcarlyle Once again, I checked everything, there are no backlashes (roads on magnets).
                P.S. earlier (without my "Smart Effector" + "Duet WiFi") on this delta, I printed much smaller things.

                1 Reply Last reply Reply Quote 0
                • undefined
                  vapvap @dc42
                  last edited by vapvap 21 Aug 2018, 21:44

                  @dc42 Cube "-5°C".
                  0_1534896759857_IMG_20180822_011020.jpg

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                  • undefined
                    vapvap @OBELIKS
                    last edited by 21 Aug 2018, 21:46

                    @obeliks My "config.g":

                    ; Configuration file for Duet WiFi (firmware version 1.21)
                    ; executed by the firmware on start-up
                    ;
                    ; generated by RepRapFirmware Configuration Tool on Mon Aug 06 2018 00:13:45 GMT+0100 (IST)

                    ; General preferences
                    G90 ; Send absolute coordinates...
                    M83 ; ...but relative extruder moves
                    M555 P1 ; Set firmware compatibility to look like RepRapFirmare

                    ;*** The homed height is deliberately set too high in the following - you will adjust it during calibration.
                    M665 R105.6 L267 B90 H212 ; 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

                    ; Network
                    M550 PMy printer ; 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

                    ; Drives
                    M569 P0 S0 ; Drive 0 goes forwards
                    M569 P1 S0 ; Drive 1 goes forwards
                    M569 P2 S0 ; Drive 2 goes forwards
                    M569 P3 S1 ; Drive 3 goes forwards
                    M350 X16 Y16 Z16 E16 I1 ; Configure microstepping with interpolation
                    M92 X80 Y80 Z80 E407 ; Set steps per mm
                    M566 X1200 Y1200 Z1000 E1000 ; Set maximum instantaneous speed changes (mm/min)
                    M203 X12000 Y12000 Z12000 E1200 ; Set maximum speeds (mm/min)
                    M201 X1000 Y1000 Z1000 E1000 ; Set accelerations (mm/s^2)
                    M906 X1000 Y1000 Z1000 E800 I30 ; Set motor currents (mA) and motor idle factor in per cent
                    M84 S30 ; Set idle timeout

                    ; Axis Limits
                    M208 Z0 S1 ; Set minimum Z

                    ; Endstops
                    M574 X2 Y2 Z2 S1 ; Set active high endstops

                    ; Z-Probe
                    M558 P5 R0.4 H5 F1200 T6000 ; Set Z probe type to effector and the dive height + speeds
                    G31 P100 X0 Y0 Z-0.1 ; Set Z probe trigger value, offset and trigger height
                    M557 R90 S20 ; Define mesh grid

                    ; Heaters
                    M307 H0 B0 S1.00 ; Disable bang-bang mode for the bed heater and set PWM limit
                    M305 P0 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 0
                    M143 H0 S120 ; Set temperature limit for heater 0 to 120C
                    M305 P1 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 1
                    M143 H1 S280 ; Set temperature limit for heater 1 to 280C

                    ; Fans
                    M106 P0 S0.3 I0 F500 H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
                    M106 P1 S1 I0 F500 H1 T45 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on
                    M106 P2 S1 I0 F500 H1 T45 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned on

                    ; Tools
                    M563 P1 D0 H1 ; 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

                    ; Automatic saving after power loss is not enabled

                    ; Custom settings are not configured

                    ; Miscellaneous
                    T1 ; Select first tool
                    M501 ; new commands override the ones earlier in your config.g

                    1 Reply Last reply Reply Quote 0
                    • undefined
                      RCarlyle
                      last edited by 21 Aug 2018, 22:13

                      Can you take a photo from the side of the print? Still looks like a mechanical issue to me, but need to see more angles I think.

                      undefined 1 Reply Last reply 22 Aug 2018, 00:06 Reply Quote 0
                      • undefined
                        vapvap @RCarlyle
                        last edited by 22 Aug 2018, 00:06

                        @rcarlyle 0_1534896391965_IMG_20180822_010311.jpg

                        1 Reply Last reply Reply Quote 0
                        • undefined
                          RCarlyle
                          last edited by 22 Aug 2018, 00:39

                          Side like looking at the perimeters, not top, thanks

                          undefined 1 Reply Last reply 22 Aug 2018, 17:18 Reply Quote 0
                          • undefined
                            Johhnyalter
                            last edited by Johhnyalter 22 Aug 2018, 09:28

                            I’m nearing my wit’s end (usually not a long journey), and would really appreciate some help. I print with a FlashForge Creator Pro, using a glass planers for a bed, and ABS juice for adhesion. I’ve been having problems with some prints. I’ve been through the print quality guides on duet3d but haven’t yet found the magic formula. I’m printing a simple 10X20X20mm cube that exhibits the issues I’m having. The .STL came with the printer. I print with Hatchbox filament.

                            undefined 1 Reply Last reply 22 Aug 2018, 20:23 Reply Quote 0
                            • undefined
                              vapvap @RCarlyle
                              last edited by vapvap 22 Aug 2018, 17:18

                              @rcarlyle
                              0_1534963876388_IMG_20180822_194904.jpg

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                              • undefined
                                RCarlyle
                                last edited by 22 Aug 2018, 18:03

                                @vapvap Noooooooo 😞 you're going in the wrong direction! like this:

                                link text

                                undefined 1 Reply Last reply 22 Aug 2018, 18:52 Reply Quote 0
                                • undefined
                                  vapvap @RCarlyle
                                  last edited by 22 Aug 2018, 18:52

                                  @rcarlyle Sorry, fixed. 🙂

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                                  • undefined
                                    dc42 administrators @Johhnyalter
                                    last edited by dc42 22 Aug 2018, 20:23

                                    @johhnyalter, the cube printed 5C lower appears to me to have better corners. Can you confirm that? If so then it confirms my view that excessive speed and/or temperature is the problem. So I suggest you reduce temperature, or add a little fan cooling, or reduce XY acceleration and/or jerk.

                                    Duet WiFi hardware designer and firmware engineer
                                    Please do not ask me for Duet support via PM or email, use the forum
                                    http://www.escher3d.com, https://miscsolutions.wordpress.com

                                    1 Reply Last reply Reply Quote 0
                                    • undefined
                                      RCarlyle
                                      last edited by 22 Aug 2018, 23:08

                                      The fact that the base starts at the correct shape and then it deforms increasing amounts near the heatbed, then gets a little better as it gets higher... that really suggests that it's an issue with the plastic not cooling fast enough. Proximity to the heatbed = more heat. Small print = not much time for heat to conduct away from the top layer. Corners = slower nozzle motion for more heat radiation into the print.

                                      Do you have an insulated hot block?
                                      Do you have ANY kind of airflow, even gentle airflow, in the printer? I find ABS quality benefits enormously from very gentle airflow.
                                      What happens when you print something 4x bigger (ie more time for plastic to cool before the nozzle approaches again)?

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                                      • undefined
                                        RCarlyle
                                        last edited by 22 Aug 2018, 23:10

                                        It IS kind of unusual geometry for a corner overheating/undercooling issue, though. Would really like to see video of the box printing.

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                                        • undefined
                                          Redemptioner
                                          last edited by 23 Aug 2018, 01:21

                                          ABS suffers from slow printing, too much heat is transferred and you end up sagging the layers under the layer you are printing, try bringing the speed up to 50mm/sec. A small amount of air flow will sharpen up the edges but will also make the part super brittle unless you can keep the air temp above 60*C.

                                          You also are clearly over extruding which will be exacerbate the layer issues

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