Owner's manual

Skip, Gauge, and Probing Cycles
Chapter 27
27-5
FormatforanyG37skipblocksisasfollows:
G37 Z__ F__;
Where : Is :
G37
Correspondstoany ofthe G-codes in the G37series. Usetheone thatis
configuredtorespondtothecurrentskipsignaldevicethatisbeingused.
X, Y, Z
The axis onwhichtheoffsetmeasurementis to be taken isspecified here as
eitherX,Y,orZ. Onlyone axismay bespecified ina G37block. The numeric
valuefollowing the axis name correspondstotheexactcoordinateatwhichthe
skipsignalisexpectedtooccur. T his value isa signedvalue(+or -- ) and
determinesthe initialdirectionoftravel. Ifmodifyingthetoollength offset,then
the tool length axis shouldbe programmed. Ifmodifyingthetooldiameter,then
anyaxis thatisnota toollengthaxismaybe programmed.
F
The tool gauging externalskipfunctionfeedrate. Ifnovalue is enteredhere,the
externalskipfunction will executeateither the currently activefeedrate,or the
feedratedefined for itin AMP(basedon whethertheAMP parameter Use AMP
Skip Feedrate is setto ”NO”or”YES”). A value entered here replaces the
currently active feedrate and supersedes the AMPdefinedfeedrate.
The system i nstaller 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 will occur. 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.
The target offset value for t hese gauging operations is determined by the
currently active offset number (active D word for tool diameter offset,
active H word for tool length offset). Note that for length offset
measurement, not only must t he correct H word be active but the correct
offset must be on
(G43, or G44). If the tool diameter offset value is to be
modified, then t he following conditions must be true:
a tool diameter offset (D word) must be active though diameter
compensation (G41, G42) does not need to be on.
for most tools to get an accurate measurement for tool diameter, the tool
must be oriented so that the measured diameter is the outside edge of the
tool (not a flute or other geometric feature that would affect the tool
diameter).