Repeated G29 T1 (or G29 T0) Gives Different Results... #7021 - GitHub

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Background

I am using the latest bugfix-1.1.x (0b6b7c9) to build my firmware for my Prusa i3 printer...

Configuration.h is the only customized file and is accessible from https://github.com/lrpirlet/Marlin/tree/lrp-2-jun-2017 under https://github.com/lrpirlet/Marlin/blob/lrp-2-jun-2017/Marlin/Configuration.h

I issue an M133 S30 to avoid "echo:busy: processing" in the middle of mu disered output... I Issue G28, G29 P0 followed by G29 P1... I issue G29 W to log the G29 characteristics... All the above without any problem...

Issue I send G29 T1 several time and got different results... or rather I DO MISS some values at DIFFERENT places in each of the outputs.

extracted from https://github.com/lrpirlet/Marlin/blob/lrp-2-jun-2017/logs/Repetier_log.txt please find here the evidence for G29 T1... G29 T0 also missbehave...

14:49:39.459 : N21 G29T1*68 14:49:39.679 : ,0.148 14:49:39.819 : 0.030,0.163,0.201,0.249,0.276,0.251,0.274,0.062,0.118 14:49:39.991 : -0.015,0.126,0.175,0.158,0.228,0.230,0.272,0.198,0.148 14:49:40.147 : -0.093,-0.031,0.144,0.213,0.223,0.263,0.268,0.232,0.116 14:49:40.303 : -0.117,-0.013,0.120,0.194,0.236,0.230,0.269,0.233,0.143 14:49:40.428 : -0.124,-0.044,0.097,0.162,0.229,0.246,0.270,0.165,0.190 14:49:40.569 : -0.086,0.063,0.141,0.208,0.226,0.255,0.272,0.214,0.214 14:49:40.709 : ,0.248,0.244,0.212 14:49:40.850 : 0.004,-0.042,0.194,0.218,0.238,0.290,0.297,0.224,0.204 14:49:40.865 : ok 14:49:51.766 : N22 G29T1*71 14:49:51.970 : 0.048,0.189,0.227,0.252,0.220,0.228,0.229,0.180,0.148 14:49:52.110 : 0.030,0.163,0.201,0.249,0.276,0.251,0.274,0.062,0.118 14:49:52.252 : -0.015,0.126,0.175,0.158,0.228,0.230,0.272,0.198,0.148 14:49:52.393 : -0.093,-0.031,0.144,0.213,0.223,0.263,0.268,0.232,0.116 14:49:52.580 : -0.117,-0.013,0.120,0.194,0.236,0.230,0.269,0.233,0.143 14:49:52.735 : ,0.246,0.270,0.165,0.190 14:49:52.876 : -0.086,0.063,0.141,0.208,0.226,0.255,0.272,0.214,0.214 14:49:53.017 : -0.067,-0.034,0.177,0.215,0.233,0.284,0.248,0.244,0.212 14:49:53.157 : 0.004,-0.042,0.194,0.218,0.238,0.290,0.297,0.224,0.204 14:49:53.173 : ok 14:49:56.896 : N23 G29T1*70 14:49:57.083 : 0.048,0.189,0.227,0.252,0.220,0.228,0.229,0.180,0.148 14:49:57.254 : 0.030,0.163,0.201,0.249,0.276,0.251,0.274,0.062,0.118 14:49:57.380 : -0.015,0.126,0.175,0.158,0.228,0.230,0.272,0.198,0.148 14:49:57.583 : -0.093,-0.031,0.144,0.213,0.223,0.263,0.268,0.232,0.116 14:49:57.723 : ,0.269,0.233,0.143 14:49:57.864 : -0.124,-0.044,0.097,0.162,0.229,0.246,0.270,0.165,0.190 14:49:58.005 : -0.086,0.063,0.141,0.208,0.226,0.255,0.272,0.214,0.214 14:49:58.145 : -0.067,-0.034,0.177,0.215,0.233,0.284,0.248,0.244,0.212 14:49:58.294 : 0.004,-0.042,0.194,0.218,0.238,0.290,0.297,0.224,0.204 14:49:58.306 : ok 14:50:06.686 : N24 G29T1*65 14:50:06.890 : 0.048,0.189,0.227,0.252,0.220,0.228,0.229,0.180,0.148 14:50:07.029 : 0.030,0.163,0.201,0.249,0.276,0.251,0.274,0.062,0.118 14:50:07.170 : -0.015,0.126,0.175,0.158,0.228,0.230,0.272,0.198,0.148 14:50:07.311 : -0.093,-0.031,0.144,0.213,0.223,0.263,0.268,0.232,0.116 14:50:07.452 : -0.117,-0.013,0.120,0.194,0.236,0.230,0.269,0.233,0.143 14:50:07.593 : -0.124,-0.044,0.097,0.162,0.229,0.246,0.270,0.165,0.190 14:50:07.733 : ,0.214,0.214 14:50:07.874 : -0.067,-0.034,0.177,0.215,0.233,0.284,0.248,0.244,0.212 14:50:08.016 : 0.004,-0.042,0.194,0.218,0.238,0.290,0.297,0.224,0.204 14:50:08.032 : ok

Questions

Does anyone else see that behavior???

Since the difference between the 3 commands G29 T1 is just a different time, could we see some interrupt misshandling... I am completely at lost, and would appreciate some help...

Last but not least,

Thanks in advance.

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