Feedrate With G33, G34, G35 (Thread Cutting) - Siemens SINUMERIK 802D sl Function Manual
Turning, milling, nibbling
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Also See for SINUMERIK 802D sl:
- Programming and operating manual (364 pages) ,
- Instruction manual (262 pages) ,
- Programming manual (251 pages)
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24.1.1
Feedrate with G33, G34, G35 (thread cutting)
Note
The thread cutting function with G33, G34, and G35 is not available for versions G/N plus
and pro.
Types of thread cutting
G33 - thread with constant pitch
G34 - thread with (linearly) increasing pitch
G35 - thread with (linearly) decreasing pitch
Axis velocity
With respect to G33, G34, or G35 threads, the axis velocity for the thread length results from
the set spindle speed and the programmed pitch. However, the maximum axis velocity
defined in MD32000 MAX_AX_VELO cannot be exceeded.
The feedrate F is not relevant. It is, however, kept in the memory.
The axis velocity, e.g. for a cylinder thread, results from the set spindle speed (S) and the
programmed pitch (K):
Fz [mm/min] = speed S [rev/min] * pitch K [mm/rev]
Note
For G34 and G35 the pitch change in mm/rev
Reference:
/BP_/ Operation and Programming
Minimum spindle speed
In order to ensure smooth rotation at low speeds, the spindle speed is not permitted to fall
below a minimum level. This speed can be set in SD43210 SPIND_MIN_VELO_G25
(minimum spindle speed) and for each gear stage with MD35140
GEAR_STEP_MIN_VELO_LIMIT (minimum speed for gear stage change). The minimum
spindle speed can be changed in the part program with G25.
NC stop, single block
NC stop and single block are only active after completion of thread chaining.
Turning, Milling, Nibbling
Function Manual, 11/2012, 6FC5397-1CP10-5BA0
is programmed under the F address.
2
Feed (V1)
24.1 Path feedrate F
411
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