Acu-Rite CNC 3500i user manual Edge Finding

7.3 Probing Cycles

Edge Finding

Calibrate the work probe at least once before trying to use this cycle.

A preliminary tool-length offset must be set by eye for the work probe and that tool offset, and work coordinate active before using this cycle in a program. See Section 4, "Tool-Length Offsets" on page 73.

The Edge Finding Cycle can be run from within a program or from Manual Data Input Mode.

Field	Code	Description
Search	Q	Axis and direction to find edge.
Dir		0 = X+, 1 = X-, 2 = Y+, 3 = Y-, 4 = Z+, 5 = Z-
Offset	W	Work Coordinate to update with edge
		location in X- or:
		Y-axes. If set, work coordinate is updated if
		0 through 3 are specified for Q or Z work
		offset (or TLO if
		updateTloOrWorkOffsetZAxis is set to
		TLO) if Q is set to 4 or 5 and Z TLO if Q is
		set to 6.
		Before any tool-length offset is active, you
		must re-call that tool. Work coordinate
		register or Tool-length register is not
		updated if W is not set and a warning
		message tells the operator no update has
		taken place except when Q is set to 6 in
		which case the Spindle Probe TLO will
		always be reset. (Optional)

To use the Edge Finding Cycle:

Place the probe in the spindle with its tool number active and the tool type set to "Touch Probe".

Manually jog the probe stylus less than 0.1" (2.54 mm) away from the surface to be found.

Type G141 Qn Wn. If this is run from inside a program, this line needs to be repeated for every surface you wish to find.

When positioning the probe from within the program you should always use the G146 (Protected Probe Positioning) cycle (see G146 instructions later in this document).

Execute the line in Manual Data Input Mode by touching NC Start.

220 7 Programming: Canned Cycles, sub-programs