HEIDENHAIN TNC 306 Technical Manual - Manual (Page 217)

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TNC 406/TNC 306 10 Handwheel 4-117
10 Handwheel
Either an integral handwheel (HR 130) or a portable handwheel (HR 330 or HR 410) can be
connected to HEIDENHAIN contouring controls TNC406 and TNC306 (see also chapter "Mounting
and Electrical Installation"). The operation of the electronic handwheel is described in the TNC User's
Manuals.
If electronic handwheel operation is chosen but no handwheel is connected, the error message
"HANDWHEEL NOT READY" will appear.
Shock and vibration can cause a slight movement of the handwheel and thus lead to an unwanted
traverse movement. To avoid this, a threshold sensitivity for the electronic handwheel can be
entered in machine parameter MP7660 .
The count direction for the encoder signals from the handwheel is entered in machine parameter
MP7650.
MP7640 Handwheel
Entry: 0 to 3
0 = no handwheel
1 = HR 330
2 = HR 130
3 = HR 410
MP7650 Count direction for handwheel
Entry: 0 or 1
0 = positive count direction
1 = negative count direction
MP 7660 Threshold sensitivity for electronic handwheel
Entry range: 0 to 65 535 [increments]
HR 330
A subdivision factor can be selected in the "Handwheel" operating mode (only HR330). This
subdivision factor determines the traverse distance per turn. In order to ensure that the rapid
traverse rate fixed by the machine parameter MP1010.x is not exceeded, the NC determines the
minimum entry value for the interpolation factor. The NC goes by the smallest value which was
entered, i.e. according to the slowest axis.
Machine parameter MP7670.0 can be used to select a higher limit than that calculated by the NC.
Interpolation factor Traverse distance per turn [mm] Effective from rapid traverse rate:
MP1010.x [mm/min]
0 20 12 000
1 10 6 000
2 5 3 000
3 2.5 1 500
4 1.25 750
5 0.625 80
6 0.312 80
7 0.156 80
8 0.078 80
9 0.039 80
10 0.019 80