HEIDENHAIN TNC 370 User Manual page 212

8 Cycles
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8.3 Cycles for Milling Pockets, Studs and Slots
CIRCULAR POCKET FINISHING (Cycle 214)
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The algebraic sign for cycles parameter
DEPTH defines
the working direction.
*
tf
it is necessary to finish the pachet
from
solid, use3 8. center-cut end mill W3 1641 f ark-4 eZtter a low positioning
feed rate.
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Process
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The TNC moves the tool in the Z axis to the setup clearance, or-if this
has been specified-to the 2nd setup clearance and subsequently to
the center of the pocket.
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From the center of the pocket the tool moves in the working plane to
the starting point for machining. For calculating the starting point, the
TNC takes into account the diameter of the finished part and the tool
radius.
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If the tool is at the 2nd setup clearance, the TNC moves the tool in
rapid traverse to the setup clearance and from there at the positioning
feed rate to the first infeed depth.
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The tool subsequently moves tangentiatly to the contour of the finished
part and, using climb milling, machines one revolution.
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After this, the toot moves tangentially away from the contour, back to
the starting point in the working plane.
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This process is repeated until the programmed depth is reached.
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At the end of the cycle the TNC moves the tool at rapid traverse to the
setup clearance or-if this has been specified-to the 2nd setup
Fig. 8.21: CIRCULAR POCKET FINISHING
clearance and subsequently to the center of the pocket (end position =
cycle
starting position).
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TNC 370 8-23
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