Calibrating The Electronic Workpiece Probe - Siemens SINUMERIK 840D sl Operating Manual

Setting up the machine
2.6 Measuring the workpiece zero
Second example
Measuring workpieces in swiveled states. The workpiece is to be probed in the X direction
even though the probe cannot approach the workpiece in the X direction because of an
obstructing edge (e.g. due to clamping elements). However, with a swivel movement, the
measurement in the X direction can be replaced by a measurement in the Z direction.
1. Clamp the workpiece.
2. T,S,M
3. Manual swivel
4. Measure workpiece
2.6.4

Calibrating the electronic workpiece probe

When the electronic probes are attached to the spindle, clamping tolerances usually occur.
This can lead to measurement errors.
In addition, you need to determine the trigger points of the probe relative to the spindle
center (trigger points).
Therefore, you need to calibrate the electronic probe. The radius is calibrated in a setting
ring (calibration ring) or a hole, the length is calibrated on a surface. The diameter of the
setting ring and the dimension of the surface in the Z direction (for G17) must be precisely
known and this is entered into the corresponding entry field when calibrating the probe. The
diameter of the workpiece probe ball and its length 1 must be stored in the tool list.
Procedure
Calibrating a radius
82
Load the probe and activate the desired work offset.
With "direct" swiveling enter the required rotary axis positions or with "axis by axis" the
required rotations (e.g. Y=-90) and <CYCLE START>.
Apply "Set edge Z": The measured offset in Z is converted and entered as an X value in
the chosen work offset.
1. Load the workpiece probe into the spindle.
2. Enter the approximate length and radius in the tool data.
3. Move the workpiece probe into the hole and position it in the
approximate center of the hole.
4. Select the "JOG" mode in the "Machine" operating area.
Operating Manual, 09/2011, 6FC5398-7CP40-2BA0
Milling