Probes come in many flavors and as such have varying levels of accuracy, reliability, and repeatability, depending on several factors. This command tests the probe for accuracy and produces a standard deviation based on two or more probes of the same XY position.
M48 [E<engage>] [L<legs>] [P<count>] [S<0|1>] [V<level>] [X<pos>] [Y<pos>]
Engage for each probe
Number of legs to probe
Number of probes to do
Star/Schizoid probe. By default this will do 7 points. Override with L.