RRF 3.01-RC10: Motion Bug

CCS86

I'm not sure exactly what happened here, but I think that RRF tried to move far faster than commanded.

It happened right at the beginning of a print, on the approach for my prime line. Visually, it moved far faster than normal, and Z skipped a bunch of steps, so the prime line and all that followed, was printed in mid air.

It was line 27 in this snippet:

T0
M82 ;absolute extrusion mode

;//////// START GCODE \\\\\\\\

G90          ;abs
M82          ;abs ext
M106 S0      ;fan off

M104 S160
M140 S35
M190 S35
;G4 S60

G28          ;home

M557 X19.772:66.472 Y12.239:68.833 S10.000 ; Leveling mesh defined by LevelingMeshOptimizer
G29 S0                       ;load bed mesh
M376 H3                      ; mesh taper

G1 Z60.0 F5000
G92 E0 ;zero the extruded length
G1 X20 Y20 F4000

M109 S220

G1 X10 Y0 Z.3 F2000
G1 X50 E5 F1200
G1 X140 E11 F1200
G1 Y2 Z.08 F9000
G4 S2
G1 X20 Z.05 F9000
G1 Z5

F2000 is a very casual speed, with no reason to skip steps.

I paused and cancelled the print, then chose print again. The behavior did not repeat. I hate when the same gcode has two very different results.

dc42

@CCS86 said in RRF 3.01-RC10: Motion Bug:

G1 Z60.0 F5000

What type of printer is it, and what is your Z max speed setting in M203 in config.g? 5000 mm/min is a very high speed for any printer with a screw-driven Z axis.

CCS86

@dc42 said in RRF 3.01-RC10: Motion Bug:

@CCS86 said in RRF 3.01-RC10: Motion Bug:

G1 Z60.0 F5000

What type of printer is it, and what is your Z max speed setting in M203 in config.g? 5000 mm/min is a very high speed for any printer with a screw-driven Z axis.

For sure, I am leaning on the max speed. It is an Ultimaker Original. Here are my drive config settings:

M92 X159.93 Y159.75 Z400.00 E510                       ; set steps per mm
M350 X16 Y16 Z8 E16 I1                                 ; configure microstepping with interpolation
M566 X800.00 Y800.00 Z600.00 E200.00                   ; set maximum instantaneous speed changes (mm/min)
M203 X12000.00 Y12000.00 Z1800.00 E2400.00             ; set maximum speeds (mm/min)
M201 X4000.00 Y4000.00 Z1200.00 E1500.00               ; set max accelerations (mm/s^2)

The issue definitely occurred on this line:

G1 X10 Y0 Z.3 F2000