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

Setting up the machine
4.6 Measuring the workpiece zero
8. Measure workpiece
Apply "Set edge Z" to define the offset in Z.
9. Start part program to remachine under AUTO.
Start the program with swivel 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
Load the probe and activate the desired work offset.
3. Manual swivel
With "direct" swiveling enter the required rotary axis positions or with "axis by axis" the
required rotations (e.g. Y=-90) and <CYCLE START>.
4. Measure workpiece
Apply "Set edge Z": The measured offset in Z is converted and entered as an X value in
the chosen work offset.
4.6.4

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
96
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.
Operating Manual, 05/2017, A5E40868956
Milling