L972/L982 Automatic Tool Measurement - Siemens SINUMERIK 840 User Manual

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4.1.3

L972/L982 Automatic tool measurement

Function and application
The cycle positions the tool to the tool probe depending on the tool type used.
To begin with, the "Tool change position" F, stored in the MDC or programmed under R18/19,
is approached. The tool is then measured in the abscissa and subsequently in the ordinate
(see Fig. 4.7).
When empirical values are used (R11 0), the specified empirical value memory number
R11= m is used for the abscissa (see Section 2.1).
The cycle defines R11 = m+1 for the ordinate. Two consecutive memories are used.
R11 is specified for the constant when tool types 1-4 are used.
max-1
R11 = m+2 must be specified for the next tool.
Tool types 0, 5, 6, 7, 8, 10, 26, 28, 35 - 38 are measured in one axis only, if R23 = 00x2.
Tool type 9 cannot be measured with this variant.
The tool lengths are calculated according to "PN" or "SN", i.e. referred to the tool tip or tool
nose radius centre, depending on the definition of R23.
"N" is located at the position stored in the MDC on completion of measurement and between
the measuring points 1 and 2 (with R23 102) if R18/19 has been defined with the value 0. In
the case of R18/19 0, "N" is positioned each time at a distance corresponding to the
amount of R18/19 away from the tool probe.
Preconditions :
• The MDC (tool change position) must have been loaded.
With these values, a position "Tool change position" N must be defined at which all tools
which can possibly be used on this machine can be changed without collision at the tool
probe.
• It must be possible to approach the change position without collision.
• The measuring axis must be programmed with G53 and the associated TO memory No.
©
Siemens AG 1990 All Rights Reserved
SINUMERIK 840/850/880 (BN)
4 Measuring Cycles for Turning Machines
4.1.3 L972/L982 Automatic tool measurement
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