Teach-in | Thread and undercut cycles
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HEIDENHAIN | MANUALplus 620 | User's Manual | 12/2017
Recutting threads, Expanded (longitudinally)
Select Thread cutting
Select Thread cycle
Select the Expanded soft key
Press the Recut soft key
Select the type of thread:
On: Internal thread
Off: External thread
This optional cycle recuts a single-start 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: Start point thread
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
GK: Thread runout length
C: Measured angle
ZC: Measured position
T: Tool number – turret pocket number
ID: ID no.
S: Constant spindle speed
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