Rockwell-automation 8520-GUM 9/Series CNC Grinder Operation and Progra Manual de usuario descargar pdf (Pagina 394)

100

101

AxisMotion

Chapter 12

12-22

During cornering, the control can perform a chamfer (a linear transition

between blocks) or a corner radius (an arc transition between blocks).

,C Chamfer size Thisword definesachamfer length thatconnectstwo inter-

secting paths. Itsvalue determinesthe distance thatthe

chamfer begins and ends fromthe intersectionpoint.

,R Cornerradius Thisworddefinestheradiusof an arcthatistangentto two

intersectingpaths.

Both the chamfer and the corner radius are generated between two motion

blocks which must be programmed in the same plane. The motion block

with the corner chamfering (,C) or the corner radius (,R) word is defined as

the first cornering block. The next motion block in the cornering plane is

defined as the second block.

If more than one ,C-- or ,R--words are programmed in the same block, the

control uses only the right--most word, and ignores others. The second

block can also have a corner chamfering or corner rounding word in it. If

it does, the second block is also used as the first block of the next corner

chamfering or corner rounding.

The chamfering and corner radius features are often used in conjunction

with QuickPat h Plus. They can be programmed in either absolute (G90) or

incremental (G91) modes.

ATTENTION: If a programming error of some type is made in

the block defining the second path, the chamfer or radius is not

made. Instead the first block is executed to its programmed

endpoint without a chamfer or radius. This can cause damage to

the part or grinding wheel.

Three common error conditions that occur with corner programming are:

if a programmed block with a ,C or ,R is not followed by another

motion block in the same plane prior to the end of program, an error

results

if an MDI block with a ,C or ,R is entered it must be immediat ely

followed by an MDI block with motion in the same plane, or else an

error results

if more than 4 non-motion blocks are programmed immediately after a

,C or ,R block, an error res ults. A non-motion block is any block that

does not generate axis motion in the current plane

12.3

Chamfering and Corner

Radius

1 2 ... 389 390 391 392 393 394 395 396 397 398 399 ... 819 820

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