Acu-Rite CNC 3500i User Manual

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7 Programming: Canned Cycles, sub-programs
7.
3 Pr
obing Cy
cles
You must have the tool positioned over the probe stylus so the tooth 
that sticks down the furthest is directly over the center of the probe 
stylus and above the stylus less than 0.100" (2.0 mm). 
To measure the tool length:
Jog the tool to the top of the probe stylus so that the tooth that 
sticks down the furthest is directly over the center of the probe 
stylus.
From the Manual Data Input Mode with G-code MDI selected, type 
G152 Tn Dd and touch the Start button. Where T is the tool number 
and D is roughly the diameter of the special tool. For example, G152 
T3 D3.5.
The spindle turns on in reverse and the Z-axis should go down and 
touch the top of the probe stylus keeping the X and Y position the 
same, then rapid up 0.02" (0.508 mm) and then retouch using the 
slow feedrate programmed in the machine setup parameter. The 
cycle then updates the tool-length offset register clearing any value 
in the length wear register, turn the spindle off and return the tool 
to the Z height where it started.
The Tool Length has been set and you can now change to another 
tool, and repeat steps 1 through 3.
Large tools can result in probe damage if the touch 
feedrate is set too fast. For this reason, the cycle 
parameters: M, S, and R have been added to enable the 
programmer/operator to override the values in the 
machine setup parameters for the specific tool being 
checked or set.
If the spindle is locked, you may have to unlock it to 
manually orient the tool tooth over the probe stylus.