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    [3.4beta6] CoreXY 'Banging' Motor Sound

    Scheduled Pinned Locked Moved Solved
    Beta Firmware
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    • Pakueundefined
      Pakue
      last edited by

      After updating I've noticed a very loud motor 'banging' sound when changing direction, similar to having the acceleration/jerk set very high. The issue happens even with low jerk/acceleration/feed setting.

      Here a video of the noise while running with these settings:

      • M556: X: 600.0, Y: 600.0, Z: 50.0, E: 600.0, jerk policy: 0
      • M204: Maximum printing acceleration 50.0, maximum travel acceleration 200.0 mm/sec^2
      • Feed: 10000

      https://youtu.be/N-n4tybucY4

      config.g

      G4 S1   ;wait for expansion boards to start
      ; General preferences
      G90                                          ; send absolute coordinates...
      M83                                          ; ...but relative extruder moves
      M550 P"Duet 3"                               ; set printer name
      M669 K1                                      ; select CoreXY mode
      
      ; Drives
      M569 P20.0 S0                                ; toolboard drive 0.0 goes forwards 
      M569 P0.1 S1 D3 H49 V49                      ; physical drive 0.1 goes forwards
      M569 P0.2 S0 D3 H49 V49                      ; physical drive 0.2 goes forwards
      M569 P0.3 S1                                 ; physical drive 0.3 goes forwards
      M569 P0.4 S1                                 ; physical drive 0.4 goes forwards
      M569 P0.5 S1                                 ; physical drive 0.5 goes forwards
      M584 X0.2 Y0.1 Z0.3:4:5 E20.0                ; set drive mapping
      M350 X16 Y16 Z16 E16 I1                      ; configure microstepping with interpolation
      M92 X80.00 Y80.00 Z1600.00 E655              ; set steps per mm
      M566 X1000.00 Y1000.00 Z50.00 E600.00 P1     ; set maximum instantaneous speed changes (mm/min)
      M203 X60000.00 Y60000.00 Z400.00 E3600.00    ; set maximum speeds (mm/min)
      M201 X10000.00 Y10000.00 Z80.00 E600.00      ; set accelerations (mm/s^2)
      M906 X1600 Y1600 Z800 E450 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 X300 Y250 Z200 S0                       ; set axis maxima
      
      ; Endstops
      M574 X1 S3                                   ; configure sensorless endstop for low end on X
      M574 Y1 S3                                   ; configure sensorless endstop for low end on Y
      M574 Z1 S2                                   ; configure Z-probe endstop for low end on Z
      M915 X Y R0 F0 S3 H200 	                     ; enable sensorless homing
      
      ; Z-Probe
      M558 P9 C"20.io0.in" H3 F200 T15000 A4 S0.02    ; set Z probe type to bltouch and the dive height + speeds
      M950 S0 C"20.io0.out"
      G31 X0 Y-20.0 Z3.10 P25                        ; set Z probe trigger value, offset and trigger height
      M671 X-8:295:144 Y-15:-15:290 S10             ; leadscrews at front left, front right and rear middle
      M557 X10:290 Y0:230 P4:4                    ; define mesh grid
      
      ; Heaters
      M308 S0 P"temp0" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin temp0
      M950 H0 C"out0" T0                           ; create bed heater output on out0 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 S120                                 ; set temperature limit for heater 0 to 120C
      M308 S1 P"20.temp0" Y"pt1000"                   ; configure sensor 1 as PT1000 on pin temp1
      M950 H1 C"20.out0" T1                           ; create nozzle heater output on out1 and map it to sensor 1
      ;M307 H1 B0 S1.00                             ; disable bang-bang mode for heater  and set PWM limit
      
      ; Fans
      M950 F0 C"out1" Q1000                           ; create fan 0 on pin out7 and set its frequency
      M106 P0 S0 H-1                               ; set fan 0 value. Thermostatic control is turned off
      M950 F1 C"out2" Q1000                           ; create fan 1 on pin out8 and set its frequency
      M106 P1 S1 H1 T50                            ; set fan 1 value. Thermostatic control is turned on
      
      ; Tools
      M563 P0 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
      
      ; Accelerometer
      M955 P20.0 I20								 ; Acc. on tool board CAN 20 with orientation 20
      
      ; Miscellaneous
      M501                                         ; load saved parameters from non-volatile memory
      T0   
      
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      • mrehorstdmdundefined
        mrehorstdmd
        last edited by

        Do all the obvious stuff first- make sure everything is bolted down tightly, make sure the drive pulleys are tight on the motor shafts, make sure the X axis assembly is tight on the Y axis bearing blocks, make sure the belts are tight (but not too tight).

        https://drmrehorst.blogspot.com/

        Pakueundefined 1 Reply Last reply Reply Quote 0
        • 64bitundefined
          64bit
          last edited by

          Your maximum speeds are 1000mm/s? Id love to see that thing printing. 10,000 accel is pretty crazy IMHO too.

          Pakueundefined 1 Reply Last reply Reply Quote 0
          • Pakueundefined
            Pakue @mrehorstdmd
            last edited by

            @mrehorstdmd Seems like I'm having the same issue with stealthchop like in this issue: https://forum.duet3d.com/topic/25593/problem-with-proper-setting-of-stealthchop-to-spreadcycle-mode
            Setting the drivers to spread cycle only fixed the issue. I'm a bit confused why the problem only appeared with the recent beta (didn't run beta 5 though).

            1 Reply Last reply Reply Quote 0
            • Pakueundefined
              Pakue @64bit
              last edited by

              @64bit I don't run it nearly as fast usually, that's just what the motion system can do. Having the filament lay down nicely at that speed is a bit harder (never mind the noise... :D).

              dc42undefined 1 Reply Last reply Reply Quote 0
              • dc42undefined
                dc42 administrators @Pakue
                last edited by

                @pakue you are running the drivers in stealthChop mode. A jerk or bang is normal when switching between stealthChop and spreadCycle modes at high speed. There are two ways round this:

                1. Set the changeover speed much lower, so that the bang will be much less.
                2. Reduce the maximum speed, so that you can run in stealthChop mode right up to that speed.

                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

                Pakueundefined 1 Reply Last reply Reply Quote 0
                • Pakueundefined
                  Pakue @dc42
                  last edited by

                  @dc42 Thank you for the answer! I found running it only in spread cycle the best option for this setup.

                  1 Reply Last reply Reply Quote 1
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