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(place probe aprox center of block)
(probes the surface then probes in z the #3 distance around the edges.)
(use at your own risk)
#1 = 3.95 (max x dim of block)
#2 = 3.375 (max y dim of block)
#3 = .3 (z in to measure edge)
#4 = 1 (tolerance to move bigger than block per side - in case you don't place the probe perfectly in the center)

G20
G91 G38.2 F25 Z-0.4
G90 G0 Z[#5063+0.010]
G91 G38.2 F0.2 Z-0.020
G90 G0 Z[#5063+0.2]
#5 = #5063 (surface of block)

(probe left side)
G91 g0 x[0-[#1/2+#4]]
g90 g0 z[#5-#3]


G20
G91 G38.2 F25 X[#4+.5]
G90 G0 X[#5061-0.010]
G91 G38.2 F0.2 X+0.020
G90 G0 X[#5061-0.2+[2.5/25.4]]
#1000=#5061 (left of block)

G90 G0 Z[#5+0.2]

(probe right side)

g90 g0 x[#1000 + [2.5/25.4] + #1 + #4]
g90 g0 z[#5-#3]

G20
G91 G38.2 F25 X[0-[#4+.5]]
G90 G0 X[#5061+0.010]
G91 G38.2 F0.2 X-0.020
G90 G0 X[#5061+0.2-[2.5/25.4]]
#1001=#5061 (right of block)

G90 G0 Z[#5+0.2]

(goto real center)

g90 g0 x[#1000+[#1001-#1000]/2]

(probe top of part)

g91g0y[#2/2+#4]
g90 g0 z[#5-#3]

G20
G91 G38.2 F25 Y[0-[#4+.5]]
G90 G0 Y[#5062+0.010]
G91 G38.2 F0.2 Y-0.020
G90 G0 Y[#5062+0.2-[2.5/25.4]]
#1002=#5062 (top of part)

G90 G0 Z[#5+0.2]

(probe bottom)
g90g0y[#1002-[2.5/25.4]-#2-#4]
g90 g0 z[#5-#3]

G20
G91 G38.2 F25 Y[#4+0.5]
G90 G0 Y[#5062-0.010]
G91 G38.2 F0.2 Y+0.020
G90 G0 Y[#5062-0.2+[2.5/25.4]]
#1003=#5062

G90 G0 Z[#5+0.2]

(goto center)
g90g0y[#1003+[#1002-#1003]/2]


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