Acu-Rite CNC 3500i user manual Tapping Cycle

7.2 Canned Cycles

Tapping Cycle

The machine must be equipped with spindle M-functions (FWD, REV, OFF) to use this cycle. Do not use the tapping cycle if the machine does not have spindle commands available.

The tapping canned cycle is used for tapping holes. During a tapping cycle, the tool feeds from the R-plane to Z depth. The spindle stops and reverses, the tool feeds to the retract plane, and the spindle stops, and then reverses again.

F (TPIorLead): Enter Threads per Inch when in Inch mode. Enter Lead when in MM mode. Lead is the distance from one thread to the next. You must program a spindle RPM. The Feedrate is calculated based on the spindle RPM and the TPI or Lead specified.

S (Spindle sync): To enable Spindle sync, enter a value of 1. The machine must have direct spindle control to use this feature. The spindle rotation and Z-axis movement is synched together, as in a threading cycle.

D (Dwell): A dwell time value in seconds can be entered. You may require this feature because of the time required to stop and reverse the spindle.

The Dwell occurs before the top entry to the hole, and before the spindle reversal at the bottom of the hole.

Field	Code	Description
ZDepth	Z	Absolute hole depth. (Required)
StartHgt	R	Initial Z start point, in rapid. (Required)
ReturnHgt	P	Z retract height after hole depth, in rapid.
Dwell	D	Dwell time
TPIorLead	F	Threads per Inch (TPI) in Inch mode or Lead
		(Distance between threads) in MM mode.
		(Required)
SyncSpin	S	Synchronized Spindle, No (0) or Yes (1).

G-code format: G84

150 7 Programming: Canned Cycles, sub-programs