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Did you try the late_scan_tolerance_factor in the link you pasted? For the 75Hz laser, your warning come to about 50Hz, so I guess 1.5 or should should remove those warnings.

Besides that the warnings you are getting do not seem that bad. Every couple of seconds a single scan is slightly late (0.02s). That would still come down to 50Hz if the warning would appear all the time and you also report that you usually get 70Hz.

rviz, localization, mapping, etc. should work absolutely fine with those data rates, actually with a lot less. My suspicion is thus, that you are computing too much or scans or lost somewhere else (but not from the driver). Can you check the system load? If that is a problem it might actually help to try to throttle the laser rate down.

Did you try the late_scan_tolerance_factor in the link you pasted? For the 75Hz laser, your warning warnings come to about 50Hz, so I guess 1.5 or should so should remove those warnings.

Besides that the warnings you are getting do not seem that bad. Every couple of seconds a single scan is slightly late (0.02s). That would still come down to 50Hz if the warning would appear all the time and you also report that you usually get 70Hz.

rviz, localization, mapping, etc. should work absolutely fine with those data rates, actually with a lot less. My suspicion is thus, that you are computing too much or scans or lost somewhere else (but not from the driver). Can you check the system load? If that is a problem it might actually help to try to throttle the laser rate down.