Turning Machines With B Axis - Siemens SINUMERIK 840D sl Commissioning Manual

9 Additional Functions
9.7

Turning machines with B axis

9.7 Turning machines with B axis
Setup
Tool measurement
Transformations
9-148
Where turning machines with an additional rotary axis B are concerned, the tool
can be aligned or swiveled on the X/Y plane. If your machine has a counter-
spindle, you can alternate machining on the main spindle and counterspindle
with, e.g., a tool.
The basic setting, in which all tools are measured, must be B = 0.
When setting up your machine, you must take the following machine data into
account:
MD 9808 $MM_ST_INDEX_AXIS_B
The function CUTMOD is used to create the necessary tool offsets.
References: PG/, "Programming Manual Fundamentals"
The Swivel function is activated using MD 9723 $MM_CMM_ENABLE_SWIV-
ELLING_HEAD = 1.
For aligning and swiveling purposes, the following swivel data records must be
taken into account:
S
Swivel data record for aligning and swiveling tools on the main spindle and
counterspindle (Turning, Face Y/C, Surface Y/C).
S
Swivel data record for machining inclined surfaces when milling on the main
spindle (face B).
S
Swivel data record for machining inclined surfaces when milling on the coun-
terspindle (face B).
When commissioning swiveling, you must select the "Yes" setting in the "B axis
kinematics" field in the "Commissioning Rotary axis parameters" menu.
References: PGZ/, "Programming Guide Cycles"; chapter "Swiveling – Cycle800"
Tool measurement is carried out by means of special angles for b and g, which
can be set in the input screen. With NC–Start, the rotary axes take the positions
required.
These positions are compared with the values entered before the length is set.
If the values deviate from each other by more than the value of MD 36000
STOP_LIMIT_COARSE, the message "Tool orientation Beta conflicting, press
NC–Start" (or Gamma) is output.
The tolerance limit is accepted, since minor deviations from the setpoint are
possible when, for example, an axis is jammed.
To use the function "Tracking tool (hold tool tip when swiveling)", you must com-
mission the relevant TRAORI.
SINUMERIK 840D sl Commissioning Manual CNC: ShopTurn – 11/2006 Edition
© Siemens AG 2006 All Rights Reserved
11/2006