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    Suddenly Started printing higher than usual

    Scheduled Pinned Locked Moved
    My Duet controlled machine
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    • jtroutt19undefined
      jtroutt19
      last edited by

      So I didnt change anything. Printed a vase the night before everything printed great. Today went to print a new duct for 5015 fan and when I send the file over from cura the printer starts but .45mm above the 0 point on the Z axis.

      The probe trigger point is still correct it triggers at .73mm. I literally have not changed anything. What I had to do to get it to print properly is a G92 command after manually moving the nozzle to the proper height and then send my file over.

      Is this something I have overlooked? Did something happen that i dont know about?

      ; executed by the firmware on start-up
      ;
      ; generated by RepRapFirmware Configuration Tool on Thu Sep 06 2018 21:21:12 GMT-0700 (Pacific Daylight Time)
      
      ; General preferences
      G90                                                ; Send absolute coordinates...
      M83                                                ; ...but relative extruder moves
      
      ; Network
      M550 Pe3                                           ; 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 backwards
      M569 P1 S0                                         ; Drive 1 goes backwards
      M569 P2 S1                                         ; Drive 2 goes forwards
      M569 P3 S0                                         ; Drive 3 goes backwards
      M350 X16 Y16 Z16 E16 I1                            ; Configure microstepping with interpolation
      M92 X80 Y80 Z400 E106.29                           ; Set steps per mm
      M566 X600 Y600 Z24 E300                            ; Set maximum instantaneous speed changes (mm/min) was 1200 you changed it to 600
      M203 X30000 Y30000 Z300 E1500                      ; Set maximum speeds (mm/min)
      M201 X500 Y500 Z100 E5000                          ; Set accelerations (mm/s^2) 
      M906 X500 Y500 Z500 E500 I30                       ; Set motor currents (mA) and motor idle factor in per cent
      M84 S300                                           ; Set idle timeout
      
      ; Axis Limits
      M208 X-5.5 Y-10 Z0 S1                              ; Set axis minima
      M208 X258.5 Y246 Z260 S0                           ; Set axis maxima
      
      ; Endstops
      M574 X1 Y1 S1                                      ; Set active high endstops
      
      ; Z-Probe
      M574 Z1 S2                                         ; Set endstops controlled by probe
      M307 H3 A-1 C-1 D-1                                ; Disable heater on PWM channel for BLTouch
      M307 H4 A-1 C-1 D-1                                ; Disable heater on PWM channel for BLTouch
      M558 P9 H4.0 F120 T6000                            ; Set Z probe type to bltouch and the dive height + speeds
      G31 P25 X-31 Y0 Z0.73                              ; Set Z probe trigger value, offset and trigger height
      M557 X50:185 Y50:185 S65                           ; Define mesh grid    M557 X20:215 Y20:215 S65
      
      ; Heaters
      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 S1 H1 T45 C"Part Cooling"                  ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned on
      M106 P1 S1 H1 T45 C"Hotend Fan"                    ; Set fan 1 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
      
      ; Automatic power saving
      M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; Set voltage thresholds and actions to run on power loss
      
      ; Custom settings
      ;M591 D0 P5 C3 R10:300 E3.0 S1			   ; Duet3D laser sensor for extruder drive 0 is connected to endstop input 3 (E0), tolerance 10 to ;120%, 3mm comparison length ```
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      • Phaedruxundefined
        Phaedrux Moderator
        last edited by

        Is it consistent every time you home now?

        Z-Bot CoreXY Build | Thingiverse Profile

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        • jtroutt19undefined
          jtroutt19
          last edited by jtroutt19

          Yes it is. If I start a new print I have to pause the print and zero the Z at the correct height then resume printing.

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          • Phaedruxundefined
            Phaedrux Moderator
            last edited by

            What do you get when you measure the trigger height with this?

            https://duet3d.dozuki.com/Wiki/Test_and_calibrate_the_Z_probe#Section_Calibrate_the_Z_probe_trigger_height

            Z-Bot CoreXY Build | Thingiverse Profile

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            • jtroutt19undefined
              jtroutt19 @Phaedrux
              last edited by

              @phaedrux

              So I get .73 reported in the head position. The very first time I did it it reported back to me in the actual G-Code console. It doesnt do that this go round.

              The first time I did this I followed that exact same procedure and that is where the .73 came from. But that exact value gets reported in the head position box for Z if I do it now. Just wanted to reiterate that.

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              • Phaedruxundefined
                Phaedrux Moderator
                last edited by

                So the Z position box will show whatever the G31 z offset is set to when you do a G30 because that's the height you've told it is is when the probe triggers.

                And if G30 S-1 still gives you the same value it should be correct.

                Can you post your homing file?

                Z-Bot CoreXY Build | Thingiverse Profile

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                • jtroutt19undefined
                  jtroutt19 @Phaedrux
                  last edited by jtroutt19

                  @phaedrux

                  I dont get why all of the sudden it started doing this if nothing got changed.

                  And today my bed is showing 84°c when its cool to the touch....

                  ; called to home all axes
                  ;
                  ; generated by RepRapFirmware Configuration Tool on Sat Sep 29 2018 12:21:44 GMT-0700 (Pacific Daylight Time)
                  G91                     ; relative positioning
                  G1 Z2.5 F6000 S2        ; lift Z relative to current position
                  M98 Pdeployprobe.g      ; deploy mechanical Z probe
                  G1 S1 X-269 Y-261 F1800 ; move quickly to X and Y axis endstops and stop there (first pass)
                  G1 X5 Y5 F6000          ; go back a few mm
                  G1 S1 X-269 Y-261 F360  ; move slowly to X and Y axis endstops once more (second pass)
                  G90                     ; absolute positioning
                  G1 X51 Y20 F6000        ; go to first bed probe point and home Z
                  G30                     ; home Z by probing the bed
                  
                  ; Uncomment the following lines to lift Z after probing
                  ;G91                    ; relative positioning
                  ;G1 S2 Z2.5 F100        ; lift Z relative to current position
                  ;G90                    ; absolute positioning
                  
                  
                  M98 Pretractprobe.g     ; retract mechanical Z probe 
                  
                  
                  ; homez.g
                  ; called to home the Z axis
                  ;
                  ; generated by RepRapFirmware Configuration Tool on Sat Sep 29 2018 12:21:44 GMT-0700 (Pacific Daylight Time)
                  G91              ; relative positioning
                  G1 Z2.5 F6000 S2 ; lift Z relative to current position
                  G90              ; absolute positioning
                  G1 X51 Y20 F6000 ; go to first probe point
                  G30              ; home Z by probing the bed
                  
                  ; Uncomment the following lines to lift Z after probing
                  ;G91             ; relative positioning
                  ;G1 S2 Z2.5 F100 ; lift Z relative to current position
                  ;G90             ; absolute positioning
                  
                  Phaedruxundefined 1 Reply Last reply Reply Quote 0
                  • Phaedruxundefined
                    Phaedrux Moderator @jtroutt19
                    last edited by

                    @jtroutt19 said in Suddenly Started printing higher than usual:

                    And today my bed is showing 84°c when its cool to the touch....

                    That's concerning. Is the wiring and thermistor intact?

                    M98 Pdeployprobe.g ; deploy mechanical Z probe
                    M98 Pretractprobe.g ; retract mechanical Z probe

                    You should probably remove this from homeall.

                    I can't see anything else in your homing files that's amiss.

                    Z-Bot CoreXY Build | Thingiverse Profile

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                    • jtroutt19undefined
                      jtroutt19 @Phaedrux
                      last edited by

                      @phaedrux
                      I reloaded the firmware and the temp is showing correct again.

                      I dont understand how anything has changed. But I added .4 to my trigger height and it now is at the correct height.

                      Hey while I am here let me ask you. Dual 5015 blowers or just one?

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                      • Phaedruxundefined
                        Phaedrux Moderator
                        last edited by

                        Was there possibly a head collision at some point? All it takes is a small shift. Since nothing software wise had changed, some mechanical explanation would seem likely. Wear, damage, binding, loosening parts, etc. Give everything a really good inspection.

                        @jtroutt19 said in Suddenly Started printing higher than usual:

                        Dual 5015 blowers or just one?

                        That depends how much cooling you need and what shroud you're using. I use a single 5015 with a Dii cooler shroud. Depends on the 5015 as well. How powerful are they?

                        Z-Bot CoreXY Build | Thingiverse Profile

                        jtroutt19undefined 1 Reply Last reply Reply Quote 1
                        • jtroutt19undefined
                          jtroutt19 @Phaedrux
                          last edited by

                          @phaedrux

                          Ahead of ya there. After getting home today I double checked everything. Made sure everything was still tight and square. I couldn't find any issues. But oh well its fixed now.

                          I am using the Petsfang 5015 mount for the hot end cooling with a noctua fan. The blowers other than being brushless and 24v I have not clue about. I ordered them off amazon and they sent me two. I am currently printing the duct to accommodate one of them. I just didnt know of 2 were ever going to be needed.

                          I dont know how much cooling I am going to need. Not sure how to even start answering that question.

                          Phaedruxundefined 1 Reply Last reply Reply Quote 0
                          • Phaedruxundefined
                            Phaedrux Moderator @jtroutt19
                            last edited by

                            @jtroutt19 said in Suddenly Started printing higher than usual:

                            Not sure how to even start answering that question.

                            Start printing. You'll know. One will likely be enough. I'm going to guess that the blowers from amazon are probably a little loud and pretty powerful. And they probably sent two because there's a good chance one will be DOA. So at least you have a spare.

                            Z-Bot CoreXY Build | Thingiverse Profile

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