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Need Help - Can't get good speed without jerking on axes

Discussion in 'CNC Mills/Routers' started by ftopete, May 24, 2017.

  1. ftopete

    ftopete New
    Builder

    Joined:
    Mar 27, 2016
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    I keep getting jerking on all three axes. In playing with the config, I was able to smooth out the jerkiness if I lower the velocity to 1000mm/min but everything sort of jerks while test cutting the chilipeppr logo.

    Here is my config file. I'll upload a video of the jerkiness when I get back to my desk.


    [fb] firmware build 440.20
    [fv] firmware version 0.97
    [hp] hardware platform 1.00
    [hv] hardware version 8.00
    [id] TinyG ID 5X0850-VGK
    [ja] junction acceleration 100000 mm
    [ct] chordal tolerance 1.0000 mm
    [sl] soft limit enable 0
    [st] switch type 1 [0=NO,1=NC]
    [mt] motor idle timeout 2.00 Sec
    [ej] enable json mode 0 [0=text,1=JSON]
    [jv] json verbosity 4 [0=silent,1=footer,2=messages,3=configs,4=linenum,5=verbose]
    [js] json serialize style 1 [0=relaxed,1=strict]
    [tv] text verbosity 1 [0=silent,1=verbose]
    [qv] queue report verbosity 1 [0=off,1=single,2=triple]
    [sv] status report verbosity 1 [0=off,1=filtered,2=verbose]
    [si] status interval 250 ms
    [ec] expand LF to CRLF on TX 0 [0=off,1=on]
    [ee] enable echo 0 [0=off,1=on]
    [ex] enable flow control 2 [0=off,1=XON/XOFF, 2=RTS/CTS]
    [baud] USB baud rate 5 [1=9600,2=19200,3=38400,4=57600,5=115200,6=230400]
    [net] network mode 0 [0=master]
    [gpl] default gcode plane 0 [0=G17,1=G18,2=G19]
    [gun] default gcode units mode 1 [0=G20,1=G21]
    [gco] default gcode coord system 1 [1-6 (G54-G59)]
    [gpa] default gcode path control 2 [0=G61,1=G61.1,2=G64]
    [gdi] default gcode distance mode 0 [0=G90,1=G91]
    [1ma] m1 map to axis 1 [0=X,1=Y,2=Z...]
    [1sa] m1 step angle 1.800 deg
    [1tr] m1 travel per revolution 60.0000 mm
    [1mi] m1 microsteps 8 [1,2,4,8]
    [1po] m1 polarity 0 [0=normal,1=reverse]
    [1pm] m1 power management 3 [0=disabled,1=always on,2=in cycle,3=when moving]
    [2ma] m2 map to axis 0 [0=X,1=Y,2=Z...]
    [2sa] m2 step angle 1.800 deg
    [2tr] m2 travel per revolution 60.0000 mm
    [2mi] m2 microsteps 8 [1,2,4,8]
    [2po] m2 polarity 1 [0=normal,1=reverse]
    [2pm] m2 power management 3 [0=disabled,1=always on,2=in cycle,3=when moving]
    [3ma] m3 map to axis 0 [0=X,1=Y,2=Z...]
    [3sa] m3 step angle 1.800 deg
    [3tr] m3 travel per revolution 60.0000 mm
    [3mi] m3 microsteps 8 [1,2,4,8]
    [3po] m3 polarity 0 [0=normal,1=reverse]
    [3pm] m3 power management 3 [0=disabled,1=always on,2=in cycle,3=when moving]
    [4ma] m4 map to axis 2 [0=X,1=Y,2=Z...]
    [4sa] m4 step angle 1.800 deg
    [4tr] m4 travel per revolution 60.0000 mm
    [4mi] m4 microsteps 8 [1,2,4,8]
    [4po] m4 polarity 1 [0=normal,1=reverse]
    [4pm] m4 power management 3 [0=disabled,1=always on,2=in cycle,3=when moving]
    [xam] x axis mode 1 [standard]
    [xvm] x velocity maximum 1000 mm/min
    [xfr] x feedrate maximum 1000 mm/min
    [xtn] x travel minimum 0.000 mm
    [xtm] x travel maximum 550.000 mm
    [xjm] x jerk maximum 50 mm/min^3 * 1 million
    [xjh] x jerk homing 1000 mm/min^3 * 1 million
    [xjd] x junction deviation 0.0100 mm (larger is faster)
    [xsn] x switch min 0 [0=off,1=homing,2=limit,3=limit+homing]
    [xsx] x switch max 0 [0=off,1=homing,2=limit,3=limit+homing]
    [xsv] x search velocity 3000 mm/min
    [xlv] x latch velocity 100 mm/min
    [xlb] x latch backoff 20.000 mm
    [xzb] x zero backoff 3.000 mm
    [yam] y axis mode 1 [standard]
    [yvm] y velocity maximum 1000 mm/min
    [yfr] y feedrate maximum 1000 mm/min
    [ytn] y travel minimum 0.000 mm
    [ytm] y travel maximum 760.000 mm
    [yjm] y jerk maximum 50 mm/min^3 * 1 million
    [yjh] y jerk homing 1000 mm/min^3 * 1 million
    [yjd] y junction deviation 0.0100 mm (larger is faster)
    [ysn] y switch min 0 [0=off,1=homing,2=limit,3=limit+homing]
    [ysx] y switch max 0 [0=off,1=homing,2=limit,3=limit+homing]
    [ysv] y search velocity 3000 mm/min
    [ylv] y latch velocity 100 mm/min
    [ylb] y latch backoff 20.000 mm
    [yzb] y zero backoff 3.000 mm
    [zam] z axis mode 1 [standard]
    [zvm] z velocity maximum 800 mm/min
    [zfr] z feedrate maximum 800 mm/min
    [ztn] z travel minimum 0.000 mm
    [ztm] z travel maximum 40.000 mm
    [zjm] z jerk maximum 50 mm/min^3 * 1 million
    [zjh] z jerk homing 1000 mm/min^3 * 1 million
    [zjd] z junction deviation 0.0100 mm (larger is faster)
    [zsn] z switch min 0 [0=off,1=homing,2=limit,3=limit+homing]
    [zsx] z switch max 0 [0=off,1=homing,2=limit,3=limit+homing]
    [zsv] z search velocity 3000 mm/min
    [zlv] z latch velocity 100 mm/min
    [zlb] z latch backoff 20.000 mm
    [zzb] z zero backoff 3.000 mm
    [aam] a axis mode 0 [disabled]
    [avm] a velocity maximum 230400 deg/min
    [afr] a feedrate maximum 230400 deg/min
    [atn] a travel minimum -1.000 deg
    [atm] a travel maximum -1.000 deg
    [ajm] a jerk maximum 5760 deg/min^3 * 1 million
    [ajh] a jerk homing 11520 deg/min^3 * 1 million
    [ajd] a junction deviation 0.0500 deg (larger is faster)
    [ara] a radius value 0.1990 deg
    [asn] a switch min 0 [0=off,1=homing,2=limit,3=limit+homing]
    [asx] a switch max 0 [0=off,1=homing,2=limit,3=limit+homing]
    [asv] a search velocity 600 deg/min
    [alv] a latch velocity 100 deg/min
    [alb] a latch backoff 5.000 deg
    [azb] a zero backoff 2.000 deg
    [bam] b axis mode 0 [disabled]
    [bvm] b velocity maximum 3600 deg/min
    [bfr] b feedrate maximum 3600 deg/min
    [btn] b travel minimum -1.000 deg
    [btm] b travel maximum -1.000 deg
    [bjm] b jerk maximum 20 deg/min^3 * 1 million
    [bjd] b junction deviation 0.0500 deg (larger is faster)
    [bra] b radius value 1.0000 deg
    [cam] c axis mode 0 [disabled]
    [cvm] c velocity maximum 3600 deg/min
    [cfr] c feedrate maximum 3600 deg/min
    [ctn] c travel minimum -1.000 deg
    [ctm] c travel maximum -1.000 deg
    [cjm] c jerk maximum 20 deg/min^3 * 1 million
    [cjd] c junction deviation 0.0500 deg (larger is faster)
    [cra] c radius value 1.0000 deg
    [p1frq] pwm frequency 100 Hz
    [p1csl] pwm cw speed lo 1000 RPM
    [p1csh] pwm cw speed hi 2000 RPM
    [p1cpl] pwm cw phase lo 0.125 [0..1]
    [p1cph] pwm cw phase hi 0.200 [0..1]
    [p1wsl] pwm ccw speed lo 1000 RPM
    [p1wsh] pwm ccw speed hi 2000 RPM
    [p1wpl] pwm ccw phase lo 0.125 [0..1]
    [p1wph] pwm ccw phase hi 0.200 [0..1]
    [p1pof] pwm phase off 0.000 [0..1]
    [g54x] g54 x offset 0.000 mm
    [g54y] g54 y offset 0.000 mm
    [g54z] g54 z offset 0.000 mm
    [g54a] g54 a offset 0.000 deg
    [g54b] g54 b offset 0.000 deg
    [g54c] g54 c offset 0.000 deg
    [g55x] g55 x offset 75.000 mm
    [g55y] g55 y offset 75.000 mm
    [g55z] g55 z offset 0.000 mm
    [g55a] g55 a offset 0.000 deg
    [g55b] g55 b offset 0.000 deg
    [g55c] g55 c offset 0.000 deg
    [g56x] g56 x offset 0.000 mm
    [g56y] g56 y offset 0.000 mm
    [g56z] g56 z offset 0.000 mm
    [g56a] g56 a offset 0.000 deg
    [g56b] g56 b offset 0.000 deg
    [g56c] g56 c offset 0.000 deg
    [g57x] g57 x offset 0.000 mm
    [g57y] g57 y offset 0.000 mm
    [g57z] g57 z offset 0.000 mm
    [g57a] g57 a offset 0.000 deg
    [g57b] g57 b offset 0.000 deg
    [g57c] g57 c offset 0.000 deg
    [g58x] g58 x offset 0.000 mm
    [g58y] g58 y offset 0.000 mm
    [g58z] g58 z offset 0.000 mm
    [g58a] g58 a offset 0.000 deg
    [g58b] g58 b offset 0.000 deg
    [g58c] g58 c offset 0.000 deg
    [g59x] g59 x offset 0.000 mm
    [g59y] g59 y offset 0.000 mm
    [g59z] g59 z offset 0.000 mm
    [g59a] g59 a offset 0.000 deg
    [g59b] g59 b offset 0.000 deg
    [g59c] g59 c offset 0.000 deg
    [g92x] g92 x offset 0.000 mm
    [g92y] g92 y offset 0.000 mm
    [g92z] g92 z offset 0.000 mm
    [g92a] g92 a offset 0.000 deg
    [g92b] g92 b offset 0.000 deg
    [g92c] g92 c offset 0.000 deg
    [g28x] g28 x position 0.000 mm
    [g28y] g28 y position 0.000 mm
    [g28z] g28 z position 0.000 mm
    [g28a] g28 a position 0.000 deg
    [g28b] g28 b position 0.000 deg
    [g28c] g28 c position 0.000 deg
    [g30x] g30 x position 0.000 mm
    [g30y] g30 y position 0.000 mm
    [g30z] g30 z position 0.000 mm
    [g30a] g30 a position 0.000 deg
    [g30b] g30 b position 0.000 deg
    [g30c] g30 c position 0.000 deg
    tinyg [mm] ok>
     

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