Removing Residual Material From A Contour Pocket - Siemens SINUMERIK 840D Operation/Programming Manual

3
Programming with ShopMill
3.5 Contour milling
Insertion Oscillation: The tool is inserted oscillating with the program. angle (EW).
Helical:
Center:
EW Insertion angle (for oscillation only)
FZ Feedrate FZ (for center only)
EP Insertion gradient (for helical only)
The gradient of the helix may be smaller in some geometric conditions.
ER Insertion radius (for helical only)
The radius must not be larger than the cutter radius, otherwise material will remain.
Also make sure the pocket is not violated.
Retraction If the machining operation requires several points of insertion, the retraction height
mode must be programmed:
•
•
On making the transition to the next insertion point, the tool returns to this height.
If no elements greater than Z0 are in the pocket area, Z0 + safety clearance (SC)
can be programmed as the retraction mode.

3.5.9 Removing residual material from a contour pocket

3-210
The tool is inserted along a helical path with the
programmed radius (ER) and programmed pitch (EP).
For this insertion strategy, a milling cutter is required that cuts in the
center. The programmed feed (FZ) is used for insertion.
To retraction plane
Z0 + safety clearance (SC)
When input manually, the starting point can also be located outside
the pocket. This can be useful, for example, when machining a pocket
which is open on one side. The machining operation then begins
without insertion with a linear movement into the open side of the
pocket.
If you have removed stock in a pocket (with/without islands) and
residual material still remains, ShopMill will detect this automatically.
You can use a suitable tool to remove this residual material without
having to machine the whole pocket again, i.e. avoiding unnecessary
idle motions.
Material that remains as part of the finishing allowance is not residual
material.
The residual material is calculated on the basis of the milling cutter
used for stock removal.
If you mill several pockets and want to avoid unnecessary tool
changeover, remove stock from all the pockets first and then remove
the residual material. In this case, for removing the residual material,
you also have to enter a value for the "Reference tool TR" parameter
that appears when you press the "All parameters" softkey.
SINUMERIK 840D/840Di/810D Operation/Programming ShopMill (BAS) – 10.04 Edition
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10.04
Degr.
mm/min
mm/rev
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