Siemens SINUMERIK 840C Installation Instructions Manual page 661

Siemens computer drive installation instructions

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9 Drive Servo Start-Up Application (as from SW 3)

9.5.2 Circularity test (option – SW 4)

The axis names with which the circle is to be traversed are selected in this dis-

play. No check is made to ascertain whether the selected axes correspond to

those programmed in the part program.

The measurement time for the circularity test can be parameterized only by

means of radius and feedrate and is displayed when the measurement com-

mences or when softkey Measurement is selected again.

The values entered in input fields "Radius" and "Feed" must correspond to those

entered in the part program controlling the circular motion of the axes, with allow-

ance made for the override switch. No check is made to ascertain whether the

values in the part program (including override) correspond to those entered in the

Display field "Meas. time" displays the measurement time required to record the

position actual values during traversal of the circle; this time is calculated on the

basis of the radius and feed values.

It is also possible to parameterize the mode in which measurement results are

represented (via programmed radius or mean radius) and the resolution (scaling

of diagram axes). These inputs are used by the MMC to prepare representation

of the measured values in the form of a circle diagram.

If the measurement time exceeds the time range which can be represented by

the trace buffers (measurement time position controller cycle x 2048), then an

appropriate sub-scanning process is executed for the recording.

The user must start the test program chosen to control the traversing motion (cir-

cular) for the selected axes by means of "NC start" to ensure that the program

receives the values required to perform the measurement function. "NC start" can

be executed from standard operating modes such as MDA or AUTOMATIC.

The measurement function is initiated by selecting the vertical Start softkey.

The measurement can be terminated at any time by selecting the vertical

Stop softkey.

SINUMERIK 840C (IA)

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