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Siemens SINUMERIK 840C - Curve-Gearbox Interpolation (CGI) (SW 4 and Higher); Functional Description; General

Siemens SINUMERIK 840C
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10.94 12 Functional Descriptions
12.18.5 Curve-gearbox interpolation (CGI) (SW 4 and higher)
12.18.5 Curve-gearbox interpolation (CGI) (SW 4 and higher)
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The "Curve-gearbox interpolation" function is available as an option.
12.18.5.1 General
The curve-gearbox interpolation option allows an IKA curve to be overlaid on a following axis
involved in a gearbox interpolation grouping of the type available to date. The IKA curve (see
IKA description) is stored in the control in the form of a table. This function can be used, for
example, to machine non-circular geometries. A CGI cannot be implemented without the
IKA function.
12.18.5.2 Functional description
In contrast to the gearbox interpolation (GI link branches) which operates with a constant link
factor (LF), the IKA implements a fully optional curve-gearbox interpolation (IKA link branches)
by means of a tabulated control curve (diagram below).
IKA calculation sequence
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Link type K11/K12
Input switching module: LINK ON/OVER/OFF, pos. rel.
Input evaluation module: T18/T19,
T15, T16
Interpolation module of IKA SW 4
Output evaluation via numerator/
denominator
Limiting module: Following axis/
spindle-specific MD, interface
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Up to 5 leading axis/spindle paths
and 1 overlay path
Z
*LRF
FA
N
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Input selection module (interpolation input): T2/T20
Input switching module: T11, T17/T41/T42
Input evaluation module: T18/T19, T15, T16
Interpolation module: T0, T1, T12/T13, T40/T43
Output evaluation module: T4/T30, T31/T32/T34
Input selection module (weighting input): T25/T26
Output evaluation module: T3/T33
Global IKA module: T1, T5/T6, T7-T10
Compensation limiting module: Axis-spec. MD, interface
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IKA SW 4
The following can be applied to IKA input quantity A:
Absolute axis setpoint position,
absolute axis actual positions or
R parameters.
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50
12–135
SINUMERIK 840C (IA)

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