Heidenhain TNC 620 (34056x-04) Cycle programming Manuel d'utilisateur Page 153

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CIRCULAR STUD (Cycle 257, DIN/ISO: G257, software option 19) 5.7
5
TNC 620 | User's Manual Cycle Programming | 5/2013
153
Danger of collision!
Use the machine parameter displayDepthErr to
define whether, if a positive depth is entered, the
TNC should output an error message (on) or not (off).
Keep in mind that the TNC reverses the calculation
for pre-positioning when a positive depth is
entered. This means that the tool moves at rapid
traverse in the tool axis to set-up clearance below
the workpiece surface!
Leave enough room next to the stud for the approach
motion. Minimum: tool diameter + 2 mm
At the end, the TNC positions the tool back to the
set-up clearance, or to the 2nd set-up clearance
if one was programmed. This means that the end
position of the tool after the cycle differs from the
starting position.
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