Question And Problems 1 Before planning out a job there are

Question And Problems

1- Before planning out a job there are five factors that should be considered them ( LO21-2)?

2- What would a coordinate shift be used why? (LO 21-1)

8- what are the major factors in PRZ, selection before writing a program ?(LO 21-1)?

Solution

2-Answer

When the physical location is beyond reach to coordinate(inside a chuck or outside the work envelope). The coordinate shift allows the program to refer to the original location using print dimensions even though its beyong reach.

3-Answer

Primary-Must reflect the datum or dimensioning basis of the disign

Secondary- A realible critical feature thats easy to reproduce in the setup- large surface, machined hole and so on.

1-Answer

- Critical features and dimensions with tight tolerences

- Overall work shape and special features

Holding considerations

special cutters or holding tools

- Material type,the raw billet cut size, and consider excess

Excess material may save the money in the long run

- Number of parts

how many will be run this time?

Do future runs of the same part justify better tooling costs?

- Raw material and finished part value

May justify cutting and holding tooling decisions