Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 148)

Editing Programs Online
Chapter 5
5-34
After the second point on the arc has been stored reposition the axes at the
end point of the arc. Store this block as a circular block by pressing either
the {STORE END PT} or the {EDIT & STORE} softkeys. This will
record the current tool location as the final position for this digitize
operation.
The {STORE END PT} softkey does not return the control to the
program display screen. Pressing this softkey inserts the generated
block at whatever location the cursor was last at and allows the operator
to immediately begin entering the next block using this same digitize
feature.
The {EDIT & STORE} softkey returns the control to the program
display screen. The program block just generated is displayed on the
input line of the CRT and may be edited as discussed in chapter 2. This
block is then inserted at the location of the block cursor when the
[TRANSMIT] key is pressed.
Important: To abort the circular digitize operation press the exit {
•
}
softkey at any time before pressing the {STORE END PT} or
{EDIT & STORE} softkeys. The control will be returned to softkey level
4. Then select either another digitize feature (by pressing one of the
softkeys) or the control can be returned to the regular edit session (as
discussed in section 5.2) by pressing the exit {
•
} softkey.
The following subsection assumes that steps 1-5 in section 5.4 have been
completed to initiate a digitizing operation.
Press the {CIRCLE TANGNT} softkeys if the circle is tangent at the
endpoints of the previous cutting path. When the {CIRCLE TANGNT}
softkey is pressed the control sets the current tool position as the start point
of a circular move. The screen changes to display the current tool location
in large display characters.
If the previous block was circular a tangent to the end point of the arc is
used as the tangent point to the following block.
Important: The {CIRCLE TANGNT} feature can not be selected as the
first motion block in a part program since there is no path for the start of
the arc to be tangent to.
5.4.3
Digitizing an Arc Tangent at
End Points