Acu-Rite CNC 3500i user manual Milling Cycles, Mill Cycle

7.2 Canned Cycles

Milling Cycles

Mill Cycle

The Mill Cycle is intended for contour milling operations. Tool diameter compensation, Z Pecking, Finish Stock, RoughFeed, and FinishFeed are supported. The cycle rapids to the XY start point (compensated, if ToolComp "D" parameter is used) rapid to the start height and then feed to the ZDepth (Z) or DepthCut (B) using the ZFeed (I). Subsequent milling blocks are then executed using the ToolComp (D) parameter and Feed specified. The feedrate can be changed in the blocks that are being milled. Tool diameter compensation cannot be changed from within the cycle. The cycle is terminated with the EndMill (G176) block; at which point, it rapids up to the StartHgt (H) and rapids to the X and Y location specified. If X and Y are not specified the tool remains in the current position. Activate a tool prior to Mill Cycle so the CNC knows the

tool diameter.

If the "D" parameter is used for tool diameter compensation, the lines of code in the mill cycle must start with an uncompensated ramp-on move and end with an uncompensated ramp-off move as the first and last lines in the mill cycle are not automatically compensated by the cycle.

Field	Code	Description
XStart	X	X coordinate of the start of the contour. If
		no coordinate is provided, default is set to
		the present position. (Uncompensated)
YStart	Y	Y coordinate of the start of the contour. If
		no coordinate is provided, default is set to
		present position. (Uncompensated). Move
		XStart and YStart below ZDepth.
StartHgt	H	Absolute Z position to which the CNC
		rapids before feeding into the workpiece.
		(Required)
ZDepth	Z	The absolute depth of the finished pocket.
		(Required)
DepthCut	B	Z-axis increment used for each pass.
ToolComp	D	Tool Compensation. Use Left or Right only.
		All other are no compensation.
		Compensation LEFT
		Compensation RIGHT
ZFeed	I	Z-axis feedrate (plunging feedrate).
Rough	J	XY axes roughing feedrate. Defaults to last
Feed		programmed feedrate.

156 7 Programming: Canned Cycles, sub-programs