Siemens Sinumerik 840D sl Diagnostic Manual page 110

Overview of Alarms
NCK alarms
10768 [Channel %1: ] Block %2 illegal tool orientation with 3D tool radius
compensation
Parameters: %1 = Channel number
%2 = Block number, label
Definitions: This alarm may occur during 3D face milling: the angle between the surface normal vector of the sur-
face to be machined and the largest surface normal vector of the tool surface is smaller than the limit
value given by MD21080 $MC_CUTCOM_PARALLEL_ORI_LIMIT, or the tool is oriented such that
machining would have to be performed from the rear side of the surface. In this case, the largest sur-
face normal vector is the vector the direction of which deviates most from the direction in the tool point
(i.e. parallel to the tool longitudinal axis).
With cylindrical tools or tools which end in a cylindrical part (e.g. the standard torus milling cutter), this
vector is positioned perpendicular to the tool vector. For this type of tool, the alarm indicates that the
angle between the tool longitudinal axis of, for example an envelope line of the cylinder, and the sur-
face to be machined is smaller than the minimum permissible value. With tools the (valid) surface of
which ends in a conical part instead of a cylindrical part (e.g. a beveled cutter or a torus milling cutter
where the torus is defined to be smaller than 90 degrees), this alarm indicates that the angle between
an envelope line of the taper and the surface to be machined is smaller than the minimum permissible
value.
Reaction: Correction block is reorganized.
Local alarm reaction.
Interface signals are set.
Alarm display.
NC Stop on alarm at block end.
Remedy: Modify part program. If necessary, use another tool.
Program Con- Clear alarm with NC START or RESET key and continue the program.
tinuation:
10769 [Channel %1: ] Block %2 Illegal surface normal vector with 3D tool radius
compensation
Parameters: %1 = Channel number
%2 = Block number, label
Definitions: In 3D face milling, surface normal vector and path tangent vector must theoretically be perpendicular
to one another, i.e. they must be at 90° to one another. Since both vectors can be programmed inde-
pendently of each other, deviations from this angle are possible and allowed. This alarm is generated
when the angle between surface normal vector and path tangent vector becomes less than the limit
angle given by the MD21084 $MC_CUTCOM_PLANE_PATH_LIMIT.
Reaction: Correction block is reorganized.
Local alarm reaction.
Interface signals are set.
Alarm display.
NC Stop on alarm at block end.
Remedy: Modify part program.
Program Con- Clear alarm with NC START or RESET key and continue the program.
tinuation:
2-110
SINUMERIK 840D sl, 840Di sl, SINAMICS, Diagnostics Manual (DAsl), 03/2009
© Siemens AG, 2009. All Rights Reserved
03/2009