Heidenhain TNC 320 (340 55x-03) Touch Probe Cycles User Manual download pdf (Page 144)

144

3.4 Special Cycles

MEASURING (touch probe cycle 3)

Touch probe cycle 3 measures any position on the workpiece in a

selectable direction. Unlike other measuring cycles, Cycle 3 enables

you to enter the measuring path DISTand feed rate F directly. Also, the

touch probe retracts by a definable value after determining the

measured value MB.

1 The touch probe moves from the current position at the entered

feed rate in the defined probing direction. The probing direction

must be defined in the cycle as a polar angle.

2 After the TNC has saved the position, the touch probe stops. The

TNC saves the X, Y, Z coordinates of the probe-tip center in three

successive Q parameters. The TNC does not conduct any length

or radius compensations. You define the number of the first result

parameter in the cycle.

3 Finally, the TNC moves the touch probe back by that value against

the probing direction that you defined in the parameter MB.

The exact behavior of touch probe cycle 3 is defined by

your machine tool builder or a software manufacturer who

uses it within specific touch probe cycles.

Before programming, note the following

The machine parameters DIST (maximum traverse to

touch point) and F (probing feed rate), which are effective

in other measuring cycles, do not apply in touch probe

cycle 3.

Remember that the TNC always writes to 4 successive Q

parameters.

If the TNC was not able to determine a valid touch point,

the program is run without error message. In this case the

TNC assigns the value –1 to the 4th result parameter so

that you can deal with the error yourself.

The TNC retracts the touch probe by no more that the

retraction distance MB and does not pass the starting point

of the measurement. This rules out any collision during

retraction.

With function FN17: SYSWRITE ID 990 NR 6 you can set

whether the cycle runs through the probe input X12 or

X13.

1 2 ... 139 140 141 142 143 144 145 146 147 148 149 ... 164 165

No comments

Heidenhain TNC 320 (340 55x-03) Touch Probe Cycles User Manual Page 144