Teach-in | Thread and undercut cycles
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HEIDENHAIN | MANUALplus 620 | User's Manual | 12/2017
Recutting taper threads
Select Thread cutting
Select Taper thread
Press the Recut soft key
Select the type of thread:
On: Internal thread
Off: External thread
This optional cycle recuts a single or multi-start tapered external or
internal thread. Since you have already unclamped the workpiece,
the control needs to know the exact position of the thread. Place
the cutting tip of the threading tool in the center of a groove and
transfer the positions to the parameters Measured angle C and
Measured position ZC by pressing the Take over position soft
key. From these values the cycle then calculates the angle of the
spindle at the starting point.
This function is only available in Machine mode.
Cycle parameters:
X, Z: Start point
X1, Z1: Start point thread
X2, Z2: End point thread
F1: Thread pitch (= feed rate)
D: No.gears (default: 1 single-start thread)
U: Thread depth (default: no input)
Outside thread: U = 0.6134 * F1
Inside thread: U = –0.5413 * F1
I: Max. approach
I < U: First cut with I, all subsequent cuts with cutting-depth
reduction
I = U: One cut
No input: I is calculated from U and F1
W: Taper angle (range: –60° < W < 60°)
GK: Thread runout length
GK < 0: Run-out at beginning of thread
GK > 0: Run-out at end of thread
C: Measured angle
ZC: Measured position
T: Tool number – turret pocket number
ID: ID no.
S: Constant spindle speed
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