NCT Group 99M, 2000M manual Canned Cycles for Drilling

17 Canned Cycles for Drilling

17 Canned Cycles for Drilling

A drilling cycle may be broken up into the following operations.

Operation	1: Positioning in the Selected Plane
Operation	2: Operation After Positioning
Operation 3: Movement in Rapid Traverse to Point R
Operation	4: Operation in Point R
Operation	5: Drilling
Operation	6: Operation at the Bottom of the Hole
Operation	7: Retraction to Point R
Operation	8: Operation at Point R
Operation	9: Retraction in Rapid Traverse to the Initial Point

Operation 10: Operation at the Initial Point

Point R, point of approach. - The tool approaches the workpiece to that point in rapid traverse. Initial point. - The position of the drilling axis assumed prior to the start of cycle.

Fig. 17-1

The above operations give a general picture of a drilling cycle, some of them may be omitted in specific instances.

A drilling cycle has a positioning plane and a drilling axis. The plane of positioning and the drill axis will be selected by plane selection instructions G17, G18, G19.

G code	Positioning plane	Drilling axis
G17	plane Xp Yp	Zp
G18	plane Zp Xp	Yp
G19	plane Yp Zp	Xp

135