Manual

Skip and Gauge Probing Cycles
Chapter 27
27-4
The format for any G37 skip blocks is:
G37 Z__ F__;
Where : Is :
G37
Corresponds toany of theG-codes inthe G37series. Use theone that is
configured to respond to thecurrent skip signal devicethat is beingused.
X, Z
The axis on whichthe lengthoffset measurement isto be taken is specified here
as eitherX or Z. Only oneaxis maybe specifiedin aG37 block. The numeric
value following the axis name correspondsto the exact coordinate at which the
skip signal is expectedto occur. This valueis asigned value(+ or --) and
determines theinitial directionof travel.
F
The tool gauging externalskip functionfeedrate. If no value is entered here, the
external skipfunction executesat either the currently active feedrate or at the
feedrate defined for it inAMP (based onwhether theAMP parameter Use AMP
Skip Feedrateis set to”NO” or ”YES”). A value enteredhere replacesthe
currently activefeedrate andsupersedes theAMP-defined feedrate.
Important: The G37 series G-codes cannot be used to modify the tool tip
radius values. Only the tool length offset values can be modified.
The target offset value for these gauging operations is determined by the
currently active tool offset number
CAUTION: If modifying a tool length offset, the offset value
generated with this gauging operation is immediately loaded
into the offset table. Since this offset must be the currently
active offset, it becomes effective either immediately when the
next block is executed or delayed until the next block that
contains motion on the tool length axis is executed (when an
offset is activated is determined in AMP by the system
installer).
The G37 series of G-codes always produce linear motion regardless of the
current mode active at their execution. After their completion, the control
returns to the operating mode active before the skip block was read (G00,
G01, G02, G03).
The system installer determines (in AMP) a position tolerance for the G37
functions. This tolerance defines a legal range before and after the
coordinate position programmed with the axis word in the G37 block.
If the skip signal is received before the tool enters or after the tool exits the
position tolerance range, a PROBE ERROR occurs. This error appears on
the screen as a warning but does not place the control in E-Stop. Instead
the G37 block is aborted and program execution proceeds to the next
block. No modification of the tool offset table is performed.