Rockwell-automation 8520-GUM 9/Series CNC Grinder Operation and Progra Manual de usuario descargar pdf (Pagina 642)

100

101

Skip and Gauge probing Cycles

Chapter 19

19-4

The format for any G37 skip block is:

G37 Z__ F__;

Where: Is :

G37

anyofthe G codesintheG37 series. Use the one thatis configured torespond

tothe currentskipsignaldevicethatis being used.

X, Z

theaxis on which thelength offsetmeasurement is tobe taken,specifiedhereas

eitherX or Z. Only one axiscan be specifiedin a G37 block. The numericvalue

followingthe axisnamecorrespondsto theexactcoordinateat whichtheskip

signal isexpectedto occur. This value is a signedvalue(+ or --)and determines

theinitial directionof travel.

thewheel gaugingexternalskipfunctionfeedrate. Ifno value is enteredhere,

theexternal skipfunctionexecutes ateitherthe currently activefeedrate,or the

feedrate defined foritin AMP(basedon whether theAMPparameter Use AMP

SkipF eedrate issetto”NO”or ”YES”). A valueenteredhere replacesthe

currently activefeedrateandsupersedes the AMPdefined feedrate.

Important: You cannot use the G37 series G codes to modify the wheel

radius offset values. You can only modify wheel length offset values.

The target offset value for these gauging functions is determined by the

currently active wheel of fset number.

ATTENTION: If modifying a wheel length

offset, the offset

value generated with this gauging function is immediately

loaded into the offset table. Since this offset must be the

currently active offset, it becomes effective immediately when

the next block is executed or is delayed until the next block that

contains motion on t he wheel length axis i s executed (when an

offset is activated is determined in AMP by your system

installer).

The G37 series of G codes always produces 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).

Your system installer det ermines 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 wheel enters or after the wheel

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 control aborts the G37 block and proceeds program

execution to the next block. No modification of the wheel offset table is

performed.

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Rockwell-automation 8520-GUM 9/Series CNC Grinder Operation and Progra Manual de usuario Pagina 642

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