Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 490)

workpiece/wheel
Inside angle
(less than 180
°
)
Outside angle
(greater than 180
°
)
workpiece/wheel
Dresser/Wheel Radius Compensation
Chapter 15
15-2
Terms Used
We use the following terms in this chapter:
If you see: It means:
inside an angle between two intersecting programmed paths is referred to as inside if,
in the direction of travel, the angle measured clockwise from the second path
into the first is less than or equal to 180 degrees. If one or both of the moves
are circular, the angle is measured from a line tangent to the path at their point
of intersection.
outside an angle between two intersecting programmed paths is referred to as outside
if, in the direction of travel, the angle measured clockwise from the second path
into the first is greater than 180 degrees. If one or both of the moves are
circular, the angle is measured from a line tangent to the path(s) at their point of
intersection.
r dresser or wheel radius
CR cross-point between two programmed paths after the dresser/wheel radius
compensation is activated
When programming a CNC, the part program is actually the reference
position of a control point on the grinding wheel relative to the active
coordinate system. Your system installer establishes this control point by
establishing a machine gauge point combined with your active wheel
length offsets.
Generally diamond-point dressers and the corners of the grinding wheel
have rounded edges that often result in a difference between the actual
machining edge and the control point. This inevitably causes a difference
between the programmed contour and the actual final contour of the part or
dressed wheel (see Figure 15.1).
Use the dresser/wheel radius compensation feature to compensate for this
difference. This feature allows you to use a wheel and diamond point
dresser with different radii without modifying the part program.
15.1
Introduction to
Dresser/Wheel Radius
Compensation