Acu-Rite CNC 3500i user manual Arc Move

7.1 Explaining Basic Cycles

Arc

Arc Move:

An Arc block initiates a feed motion and is used to cut an arc in a part. The 3500i executes arcs in the XY plane by default. For an arc in the XZ or YZ plane, program the plane change before the arc move. After you make all of the required moves in the XZ or YZ plane, return the 3500i to the XY plane. Refer to the section "Plane Selection" for more information on plane selection and arc directions.

One to four axes can be included on a block with an Arc.

X, Y, Z, and U reach the target simultaneously.

Arc is modal, and remains in effect until canceled or overridden.

Arcs can be programmed in absolute or incremental, and follows the active mode.

Specify the feedrate of the movement on or prior to the Arc block.

Conversational format: Arc CW, or Arc CCW

G-code format: G2, or G3

If the Arc block contains a value for the Z-Axis which differs from the start point, a helix is generated. Helical interpolation adds a third dimension to CW or CCW moves. For the XY plane, the tool moves in a circular motion in the XY axes and linearly in Z, simultaneously. You can use helical interpolation for rough boring applications as an example.

Press the Other button to select the Arc variant that best fits your needs. Each variant is described next.

Specify the arc movement to the desired end point at the designated radius.

Two Arcs can intersect any two points: an Arc with an included angle less than 180 degrees and an Arc with an included angle greater than 180 degrees.

128 7 Programming: Canned Cycles, sub-programs