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150 7 Programming: Canned Cycles, sub-programs
7.2 Canned Cycles
Tapping Cycle
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.
G-code format: G84
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 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).