Rockwell-automation 8520-GUM 9/Series CNC Grinder Operation and Progra Uživatelský manuál Strana 526

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Dresser/Wheel Radius Compensation
Chapter 15
15-38
When necessary, the control generates extra motion blocks to keep the
dresser/wheel in tolerance of the desired path. This becomes necessary
when the intersection of paths is an outside path (as defined on page 15-2)
that has an angle as follows:
Between 0
° and 90° during radius compensation left (G41)
Between 270° and 360° during radius compensation right (G42)
Figure 15.30 through Figure 15.33 illustrate the basic motion of t he
dresser/wheel as it executes program blocks during radius compensation.
Figure 15.30
Dresser/Wheel Radius Compensation Paths Straight Line-to-Straight
Line
180 ≤θ270
270
≤θ360
90 ≤θ≤180
0
≤θ≤90
generatedblock
G41
G42
Programmed path
G41
G42
Programmed path
θ
G41
G42
Programmed path
θ
θ
θ
G41
G42
Programmed path
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
0 ≤θ≤90
G41
G42
Programmed path
θ
r
r
r
r
G39.1 (Circular Generated Block)G39 (Linear Generated Block)
G39.1 (Circular Generated Block)G39 (Linear Generated Block)
270 ≤θ360
θ
G41
G42
Programmed path
r
r
r
r
r
generatedblock
Linear
Circular
generated
Linear
block
generated
Circular
block
12121-I
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