Heidenhain TNC 320 (340 551-02) Manuel d'utilisateur Page 190

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190 8 Programming: Cycles
8.2 Cycles for Drilling, Tapping and Thread Milling
REAMING (Cycle 201)
1 The TNC positions the tool in the tool axis at rapid traverse FMAX
to the programmed set-up clearance above the workpiece surface.
2 The tool reams to the entered depth at the programmed feed
rate F.
3 If programmed, the tool remains at the hole bottom for the entered
dwell time.
4 The tool then retracts to the set-up clearance at the feed rate F,
and from there—if programmed—to the 2nd set-up clearance at
FMAX.
X
Z
Q200
Q201
Q206
Q211
Q203
Q204
Q208
Before programming, note the following:
Program a positioning block for the starting point (hole
center) in the working plane with radius compensation R0.
The algebraic sign for the cycle parameter DEPTH
determines the working direction. If you program
DEPTH = 0, the cycle will not be executed.
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).
Danger of collision!
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
at safety clearance below the workpiece surface!
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