Acu-Rite CNC 3500i user manual ’clock position. Optional

7.2 Canned Cycles

Field	Code	Description
XCenter	X	X coordinate for the arc center point.
		Defaults to current position if not given.
		(Optional)
YCenter	Y	Y coordinate for the arc center point
		Defaults to current position if not given.
		(Optional)
Angle	C	Angle in polar degrees. Default is 0 degrees
		(3 o’clock position). (Optional)
MirrorX	U	Mirrors all X moves. Set by selecting "Yes"
		in this field. (Optional)
MirrorY	V	Mirrors all Y moves. Set by selecting "Yes"
		in this field. (Optional)
Feed	F	Feedrate used while engraving. Default is
		current feedrate. (Optional)

The start point of the text string is the lower left corner of the first character. This is a polar defined coordinate using the arc’s radius, center point, and a polar angle of rotation about that point.

G-code format: G191

196 7 Programming: Canned Cycles, sub-programs