Predrilling Contour Pocket (Cycle64) - Siemens SINUMERIK 828D Operating Manual

Clamping the spindle
When milling contours, it can be useful, for example, during vertical insertion into the
material, to clamp the spindle to avoid spindle rotation. The "Clamp spindle" function must be
set up by the machine manufacturer.
Machining
You program the machining of contour pockets with islands/blank contour with spigots e.g.
as follows:
1. Enter the pocket contour/blank contour
2. Enter the island/spigot contour
3. Call the contour for pocket contour/blank contour or island/spigot contour (only for G code
4. Center (this is only possible for pocket contour)
5. Predrill (this is only possible for pocket contour)
6. Solid machine/machine pocket / spigot - roughing
7. Solid machine/machine remaining material - roughing
8. Finishing (base/edge)
9. Chamfering
8.3.9

Predrilling contour pocket (CYCLE64)

Function
In addition to predrilling, the cycle can be used for centering. The centering or predrilling
program generated by the cycle is called for this purpose.
If a milling cutter cannot be inserted at the center to remove stock from contour pockets, then
it is necessary to predrill first. The number and positions of the required predrilled holes
depends on the specific conditions, e.g. type of contour, tool, plane infeed, finishing
allowances.
If you mill several pockets and want to avoid unnecessary tool changes, predrill all the
pockets first and then remove the stock. In this case, for centering/predrilling, you also have
to enter the parameters that appear when you press the "All parameters" softkey. These
parameters must correspond to the parameters from the previous stock removal step.
Programming
When programming, proceed as follows:
1. Contour pocket 1
2. Centering
3. Contour pocket 2
4. Centering
HMI sl Milling
Operating Manual, 06/2009, 6FC5398-7CP20-0BA0
program)
Programming technological functions (cycles)
8.3 Contour milling
291