Rockwell-automation 8520-GUM 9/Series CNC Grinder Operation and Progra Manual de usuario Pagina 620

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Turning Operations
Chapter 18
18-4
Figure 18.2
Results of Example 18.1
X
25 35
Grinding/Dressingfeed
R
a
p
i
d
f
e
e
d
Z
20
24
28
Grinding
wheel
12061-I
G20 Taper O.D.and I.D. Grinding/Dressing
A G20 block that includes an I word generates a grinding/dressing pass
that produces a taper. The format to grind/dress a taper is:
G20X__Z__I__;
Where: Is :
X__ the grinding/dressing depth forthe X-axisat theend pointof thegrindingmove
intothe partorthe dressingmove intothewheel. Inincremental mode specify
theamount ofinfeed,inabsolute modespecifythe coordinatepositionatthe
desiredgrinding/dressingdepth. X can be programmed aseithera diameteror
radiusvalue.
Z__ the lengthofgrind along theZ-axis. Inincrementalmodespecifythe amountof
feedacrossthepart,in absolutemodespecifythe coordinatepositionofthe end
pointof thegrindingstroke.
I__ the amountof changeinthegrinding/dressingdepth forthe X-axis. I is always
an incremental radius value. F igure 18.4 showstherelationshipbetween the
sign ofthe I value and the way thatthe cycle isperformed. The control adds the
valueofI totheX depthtodeterminethe startpointofthe grindingpass.
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