HEIDENHAIN TNC 335 Technical Manual - Manual (Page 192)

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TNC 360 4 Spindle 4-95
The nominal position can be defined in a machine parameter MP4210.xx , and is referred to the
reference point. It must be copied into Doubleword D592 with a PLC command. The nominal
position can also be taken from the cycle "Orientation" (CYCL DEF 13). In this case the MSB of D592
must be = 1 and the other Bits set to 0. This can be carried out by the PLC program.
The orientation can be performed to an accuracy of 0.1 degree. This value results from the line count
of the rotary encoder which is incorporated (ROD 426.xx8 with 1024 lines) and the quadruple
evaluation in the TNC. A positioning window is defined by MP3420. If the spindle is within the
positioning window after orientation, marker M2007 will be set.
In order to be able to correct for any misalignment on assembly of the rotary encoder the machine
parameter MP3430 was introduced. The deviation between the nominal and actual position of the
reference mark which is entered here is taken into account during orientation.
The reference mark is instantly evaluated by the NC when the spindle is turned on for the first time.
MP3420 Positioning window for spindle
Input range: 0 to 65 535 [increments]
1 increment is equivalent to about 0.088 degree
=
360 degrees
1024 lines · quadruple-evaluation
MP3430 Reference mark deviation from the desired position (Spindle preset)
Input value: 0 to 360 [degrees]
Set Reset
M2007 Spindle in position NC NC
In order to control the orientation process precisely, a kv factor can be entered individually for each
gear range via MP3440.
MP3440 kv factor for Spindle orientation
Input range: 0.1 to 10 [1/min]
MP3440.0 kv factor gear range 1
MP3440.1 kv factor gear range 2
MP3440.2 kv factor gear range 3
MP3440.3 kv factor gear range 4
MP3440.4 kv factor gear range 5
MP3440.5 kv factor gear range 6
MP3440.6 kv factor gear range 7
MP3440.7 kv factor gear range 8