Siemens SINUMERIK 840D Simodrive 611 digital - Axis Data

6 Pro
g
rammin
g
the control
6
03/2006
6.9 Axes and spindles
6-99
© Siemens AG 2006 All Rights Reserved
SINUMERIK 840D/810D Start-Up Guide (IADC) – 03/2006 Edition
6.9.8 Axis data
For SINUMERIK 840D, 8 (or 5 for NCU 571) linear axes, which are assigned to
channel 1 (or 2), are active by default. The rotary axis and spindle must be
assigned during start-up.
For a rotary axis, the MD 30300: IS_ROT_AX must be set. This setting causes
the setpoint unit to be switched over from mm to degrees. The display for the
rotary axis is programmed in relation to 360 degrees, MD 30320:
DISPLAY_IS_MODULO (modulo 360 degree display for rotary axes),
MD 30310: ROT_IS_MODULO (modulo conversion for rotary axis).
These MD are activated after power-on. When MD 30300 is set followed by
power-on, the active axis machine data (e.g. for velocity, acceleration, jerk) are
converted automatically to the new physical unit.
Velocity = 10000 mm/min for linear axis MD 30300: IS_ROT_AX=0
After conversion to rotary axis, this MD contains the value 27.77777778 and the
unit is now rev./min.
MD 30500: INDEX_AX_ASSIGN_POS_TAB (indexing axis assignment) must
specify which global list (generally MD 10900:
INDEX_AX_LENGTH_POS_TAB1 or MD 10910: INDEX_AX_POS_TAB1
should be used for list 1 and MD 10920 or MD 10930 for list 2) with indexing
positions.
MD 30450: IS_CONCURRENT_POS_AX is used to define the axis as a
“Concurrent positioning axis”.
Reference material: /FB2/ P2, Description of the advanced functions,
Positioning axes
For machine data with the field parameter “Controller parameter set no.”, the
first field is used for normal axis operation. For interpolation involving a spindle,
e.g. for G331 (tapping without compensating chuck), the selected gear
determines the corresponding field of the axes involved (1st gear –––> field
index 1). This applies to all machine axes which can be traversed via geometry
axes. See Section 6.9.2.
For axes that interpolate together with a spindle during thread cutting (G33,
G34, G35, G331, G332), the machine data must also be supplied with corres-
ponding values with the indices [1]...[5].
All existing gear steps must be parameterized for rotary axes that are to be ope-
rated as a spindle with gear step change. (Indices [1]...[5].)
Distinguishing
between linear
axis and rotary
axis
Example
Axis types
Indexing axis
Concurrent
positioning axis
Parameter sets
Axis
Spindle