Setting The Workpiece Zero - Siemens SINUMERIK 808D User Manual

3.3

Setting the workpiece zero

Functionality
The function of setting the workpiece zero can be used to specify the reference point for machining the workpiece.
Typical application/procedure:
1. Parameterize all the machining steps (cycles) for the workpiece in relation to a "virtual zero point" (for example, an end
face).
2. Clamp the blank.
3. Scratch the relevant surface which corresponds to the "virtual zero point".
4. Use the function of setting the workpiece zero to adapt the workpiece coordinate system to the parameterized machining
operation.
Make sure that the axis does not exit from the approached position.
Additional information
NOTICE
Setting the workpiece zero carefully
Setting the workpiece zero affects the absolute machining position of all machining steps that have been parameterized in
the controller. All machining steps will now be performed in relation to the zero point that has just been set.
Setting/resetting the workpiece zero without due care and attention can result in serious damage to the tool, workpiece or
machine.
Operating sequences
1.
12
The following operations are performed automatically when you select this softkey:
The work offset is automatically calculated according to the current axis position in the
•
longitudinal axis (Z), entered in the control system memory as the basic offset and activated.
This will also set the position displayed for the longitudinal axis (Z) to 0.000, as this always
•
corresponds to the workpiece coordinate system.
If the workpiece zero is reset, the value "0.000" will be automatically entered in the control
•
system memory as the basic offset. The workpiece coordinate system display will change to
reflect this.
Press this softkey in the main screen for MM+.
This screen displays the currently programmed Z value of the basic work offset.
Programming and Operating Manual (Manual Machine Plus (MM+), Turning)
01/2017