Need help interpreting this error
{"er":{"fb":435.10,"st":31,"msg":"st_prep_line() move time is NAN"}}
prep_null encountered
So I can know what to correct.
If there is a resource error code, I'm not finding...
Homing Error
From the original Synthetos forum (2011–2025)
Hi,
fb is your firmware build,
st is the status code as found in the source tinyg.h as STAT_PREP_LINE_MOVE_TIME_IS_NAN (comment: Never supposed to happen).
Check your $$ parameters, possibly one of them is set to NaN. If so, reset to default and reenter all customized parameters.
Thanks chmr
Below is a dump from my tinyG. I'm not seeing anything.
So, just hit the reset button and send only the setup strings that differ from default?
[fb] firmware build 435.10
[fv] firmware version 0.97
[hp] hardware platform 1.00
[hv] hardware version 8.00
[id] TinyG ID 3X3566-UZR
[ja] junction acceleration 2000000 mm
[ct] chordal tolerance 0.010 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 3 [0=silent,1=footer,2=messages,3=configs,4=linenum,5=verbose]
[js] json serialize style 1 [0=relaxed,1=strict]
[tv] text verbosity 0 [0=silent,1=verbose]
[qv] queue report verbosity 0 [0=off,1=single,2=triple]
[sv] status report verbosity 1 [0=off,1=filtered,2=verbose]
[si] status interval 100 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 0 [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 0 [0=X,1=Y,2=Z...]
[1sa] m1 step angle 1.800 deg
[1tr] m1 travel per revolution 36.5400 mm
[1mi] m1 microsteps 8 [1,2,4,8]
[1po] m1 polarity 1 [0=normal,1=reverse]
[1pm] m1 power management 0 [0=disabled,1=always on,2=in cycle,3=when moving]
[2ma] m2 map to axis 1 [0=X,1=Y,2=Z...]
[2sa] m2 step angle 1.800 deg
[2tr] m2 travel per revolution 36.5400 mm
[2mi] m2 microsteps 8 [1,2,4,8]
[2po] m2 polarity 0 [0=normal,1=reverse]
[2pm] m2 power management 0 [0=disabled,1=always on,2=in cycle,3=when moving]
[3ma] m3 map to axis 1 [0=X,1=Y,2=Z...]
[3sa] m3 step angle 1.800 deg
[3tr] m3 travel per revolution 36.5400 mm
[3mi] m3 microsteps 8 [1,2,4,8]
[3po] m3 polarity 1 [0=normal,1=reverse]
[3pm] m3 power management 0 [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 36.5400 mm
[4mi] m4 microsteps 8 [1,2,4,8]
[4po] m4 polarity 0 [0=normal,1=reverse]
[4pm] m4 power management 1 [0=disabled,1=always on,2=in cycle,3=when moving]
[xam] x axis mode 1 [standard]
[xvm] x velocity maximum 10000 mm/min
[xfr] x feedrate maximum 10000 mm/min
[xtn] x travel minimum 0.000 mm
[xtm] x travel maximum 1050.000 mm
[xjm] x jerk maximum 5000 mm/min^3 * 1 million
[xjh] x jerk homing 10000 mm/min^3 * 1 million
[xjd] x junction deviation 0.0100 mm (larger is faster)
[xsn] x switch min 1 [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 10.000 mm
[xzb] x zero backoff 1.000 mm
[yam] y axis mode 1 [standard]
[yvm] y velocity maximum 10000 mm/min
[yfr] y feedrate maximum 10000 mm/min
[ytn] y travel minimum 0.000 mm
[ytm] y travel maximum 1050.000 mm
[yjm] y jerk maximum 50 mm/min^3 * 1 million
[yjh] y jerk homing 10000 mm/min^3 * 1 million
[yjd] y junction deviation 0.0100 mm (larger is faster)
[ysn] y switch min 1 [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 3 mm/min
[ylv] y latch velocity 100 mm/min
[ylb] y latch backoff 3.000 mm
[yzb] y zero backoff 5.000 mm
[zam] z axis mode 1 [standard]
[zvm] z velocity maximum 600 mm/min
[zfr] z feedrate maximum 600 mm/min
[ztn] z travel minimum -95.000 mm
[ztm] z travel maximum 0.000 mm
[zjm] z jerk maximum 5000 mm/min^3 * 1 million
[zjh] z jerk homing 10000 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 1 [0=off,1=homing,2=limit,3=limit+homing]
[zsv] z search velocity 600 mm/min
[zlv] z latch velocity 100 mm/min
[zlb] z latch backoff 10.000 mm
[zzb] z zero backoff 5.000 mm
[aam] a axis mode 1 [standard]
[avm] a velocity maximum 3600 deg/min
[afr] a feedrate maximum 3600 deg/min
[atn] a travel minimum -1.000 deg
[atm] a travel maximum -1.000 deg
[ajm] a jerk maximum 2400 deg/min^3 * 1 million
[ajh] a jerk homing 2400 deg/min^3 * 1 million
[ajd] a junction deviation 0.0500 deg (larger is faster)
[ara] a radius value 1.0000 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 10.000 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 5000 Hz
[p1csl] pwm cw speed lo 0 RPM
[p1csh] pwm cw speed hi 10000 RPM
[p1cpl] pwm cw phase lo 0.000 [0..1]
[p1cph] pwm cw phase hi 1.000 [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 110.000 mm
[g55y] g55 y offset 110.000 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 110.000 mm
[g56y] g56 y offset 20.000 mm
[g56z] g56 z offset -10.000 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
mristau
I suggest you upgrade to tinyG fw build 438.02, it may/may not help here.
We have seen situations where parameter issues were not obvious.
A defa=1 command will reset everything to default. So will installing the new FW.
If you can, use this method to post parameters
https://www.synthetos.com/topics/forum-information-sharing-readme/
Makes viewing the parameters much easier.
I see flow control is turned off. What are you using to send GCode?
Or perhaps a better question, what command or commands resulted in the error message?
All for motors have the same $*tr = 36.544mm. Is that correct?
Thanks for the help.
The command that caused the error was: G28.2 X0 Y0
Tried to use TGfx to update firmware to 438.02 but still shows 435.10?
I'm using Coolterm Windows version.
I suggest you try avrdude to update FW. Follow guides here
https://github.com/synthetos/TinyG/wiki/TinyG-Updating-Firmware
As suggested above, I've reset to default values and revised with my custom settings. Result: No more homing error. (Still with firmware 435.10)
If I recall correctly, the bugs fixed in 438.02 were related to accumulated errors with very short moves(moves less than the minimum X-Y move).
You should get your machine up to to 438.02 sometime, but if 435.10 works for you for now, enjoy.
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