After identifying what style of machining is to
take place, the next information needed is the Figure Pattern. This is the
coordinate data that makes up the part geometry. When the entire shape has been
input, you must end the unit by pressing the “SHAPE END” menu key. This action
closes the Unit and starts a new one. It is also a good idea to complete a
SHAPE CHECK, at this point, to ensure the data that has been input is correct.
The Shape of the Figure Pattern will be displayed on the screen.
PATTERN OF FIGURE <MENU>? ( )
Figure 24 Pattern of
Figure Menu Keys
• Choose Square from the Menu keys
On the display there are columns with the
headings: P1X/CX, P1Y/CY, P3X/R, P3Y,
CN1, CN2, CN3, CN4.
CORNER 1 COODINATE X? ( )
• Key in -2.125 and press Input
This value represents the coordinate for the
lower left hand corner of the part geometry
for the
X
axis.
CORNER 1 COODINATE Y? ( )
•
Key in
-2.125 and press Input
This value represents the coordinate for the
lower left hand corner of the part geometry for the
Y
axis.
CORNER 3 COODINATE X? ( )
•
Key in
2.125 and press Input
This value represents the coordinate for the
upper right hand corner of the part geometry for the
X
axis.
CORNER 3 COODINATE Y? ( )
•
Key in
2.125 and press Input
This value represents the coordinate for the
upper right hand corner of the part geometry for the
Y
axis. This entry
completes the required geometry for the Face Milling operation.
Note: CN1 through CN4 allow the entry of
chamfers or radii at each of the individual corners of the square.
•
Press Input
4 times to omit entries for CN1 through CN4
•
Press the
SHAPE END Menu key
A new Unit is started and is labeled UNo. 3.
MACHINING UNIT <MENU>?
Figure 25 STEP Machining
Unit Menu Keys
•
Select FACE
MACHINING
•
Select STEP
from the Menu selection keys
The displayed column headings are the same for
STEP machining as in facing. The acronyms described at the beginning of this
section are the same. Focus your attention on the prompting question in the
lower right-hand corner of the display for data entry.
DIST: WPC 0 TO FIN. SURFACE? ( )
•
Since our
finished Z-zero surface is our reference, we will Input zero (0) here
Z AXIS STOCK REMOVAL? ( )
•
Since we
know there is .375 of material to remove in our STEP, Input .375. No sign is
necessary
BOTTOM FACE ROUGHNESS <MENU>? ( )
•
Input 6 here
for the surface roughness control for the bottom
(BTM)
of the STEP
WALL ROUGHNESS <MENU>? ( )
•
Input 6
here for the surface roughness control for the walls (
WAL
) of the STEP
FINISH ALLOWANCE Z ? ( )
This value is automatically calculated based on
the bottom (
BTM
)surface roughness
number selected. It can be modified, at any time; however.
•
Accept the
pre-calculated value (.0098) and press Input
FINISH ALLOWANCE R ? ( )
This value is automatically calculated based on
the wall (
WAL
) surface roughness
number selected. It can be modified, at any time; however.
•
Accept the
pre-calculated value (.0098) and press Input The tool data information is input
for the unit now. The column headings are titled the same as in the face
machining unit for SNo.