Acu-Rite CNC 3500i user manual Drilling Cycles, Drilling, Tapping, and Boring, Basic Drill Cycle

7.2 Canned Cycles

Drilling Cycles

Drilling, Tapping, and Boring

When you activate a drilling cycle, it executes after each programmed position, until you cancel it.

The P entry (return height) is optional, and you do not need to provide it. If you do not specify P, the CNC sets it to R. If P is provided, it must be greater than R, or an alarm is given.

The following reminders are for drill cycles:

F feedrate is optional. If it is not given, the current feedrate is used.

All start heights (R) and finish heights (P) as well as Z dimensions are absolute dimensions.

For all peck drill cycles, R (start height) must be 0.1" (or 2 mm) above the work surface.

Tapping uses S word for Spindle Yes/No. Your machine must be equipped with spindle M-functions.

Z-axis depth can be changed by placing a new Z depth on the same line as the X- and/or Y-axis location of the hole you want the new depth applied. A Z address on a line of its own causes the control to drill the new depth at the current location.

Basic Drill Cycle

Modal cycles remain active until canceled. Use Drilloff (G80) to cancel drill, tap, and bore canned cycles.

Basic drilling cycle is generally used for center drilling or hole drilling that does not require a pecking motion. It feeds from the start height

(R) to the specified hole depth (Z) at a given feedrate (F), then rapids to the return height (P).

Field	Code	Description
ZDepth	Z	Absolute hole depth. (Required)
StartHgt	R	Initial Z start point, in rapid. (Required)
ReturnHgt	P	Z return point after hole depth, in rapid.
Feed	F	Feedrate

G-code format: G81

148 7 Programming: Canned Cycles, sub-programs