Homing - prep_null encountered

From the original Synthetos forum (2011–2025)

Started by mristau on in TinyG Support. 2 replies, last activity Feb 14, 2015.

#

prep_null encountered when homing. Any thoughts on why much appreciated.
(firmware build 435.10/v.0.97, platform 1.00/v. 8.00)

G28.2 X0 Y0 Z0
tinyg [mm] ok>
coor:0,dist:1,stat:9
(Z)
posz:-54.277,feed:200.00,vel:200.00,momo:1
posz:-53.461
posz:-52.644
.....etc.....
posz:-1.931
posz:-1.114
posz:-0.298
posz:0.519
posz:1.336
posz:2.152
posz:2.937,vel:66.65
posz:2.942,vel:0.18
posz:2.751,feed:50.00,vel:50.00
posz:2.636,vel:0.25
posz:1.898,feed:200.00,vel:200.00
posz:1.083
posz:0.269
posz:-0.546
posz:-1.360
posz:-2.192
prep_null encountered <<<<<<<<<<<<
posz:65.000,vel:0.000
(X)
posx:-3.093,posz:0.000,feed:3000.00,vel:800.00
posx:-6.359
posx:-9.626
posx:-11.119,vel:2.61
posx:-10.709,feed:100.00,vel:100.00
posx:-10.301
posx:-10.007,vel:3.50
posx:-6.947,feed:3000.00,vel:800.00
prep_null encountered <<<<<<<<<<<<
posx:-1095.000,vel:0.00
posx:0.000,posy:-3.026,vel:800.00
(Y)
posy:-6.293
posy:-9.559
posy:-10.919,vel:2.61
posy:-10.526,feed:100.00,vel:100.00
posy:-10.117
posy:-9.966,vel:3.50
posy:-6.906,feed:3000.00,vel:800.00
prep_null encountered <<<<<<<<<<<<
posy:-1095.000,vel:0.00
posy:0.000,feed:0.00,coor:1,dist:0,momo:4,stat:3

#

Also now getting prep_null with G0 commands:

posx:510.703,posy:510.703
posx:523.766,posy:523.766
posx:536.830,posy:536.830
posx:549.589,posy:549.589,vel:2262.74
prep_null encountered <<<<<<<<<<<<
posx:550.000,posy:550.000,vel:0.00,stat:3

(The error persists after a board reset + a $defa=1)

Staff #

I was hoping someone would comment, I have no useful experience with this status message.

Still occurring?
All Gcodes or just some?

Your tinyG FW is not the most current (438.02 is most current), but can't say that would resolve.

Perhaps post your settings and the (or one of) offending Gcode files.
Suggestion: follow procedure here:

https://www.synthetos.com/topics/forum-information-sharing-readme/

This topic is from the original forum (February 2015). Your reply starts a new discussion linked to it.

Reply

Different problem? Ask a new question

Back to TinyG Support or latest activity.