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Tooling U Test 1 Questions and Answers
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What must a programmer do to calculate the X-axis location of the start of the partial arc shown? The programmer must find the length of ✔✔Side a, double it, and subtract that amount from the workpiece face diameter.
A standard twist drill has a 0.50 in. (12.70 mm) diameter. What trigonometric calculations can be used to find the accurate drill depth? ✔✔Find the length of the shortest side of the right triangle, side b, that is formed at the drill tip, using the ratio tan 59°=0.25 in. (6.35mm)/a.
What is the purpose of adding an approach to a cut? ✔✔It increases safety.
What is the difference between the R method and the I and K method of programming arc motions? ✔✔The R method uses the radius size, while the I and K method uses the arc center coordinates.
What is the function of codes G41 and G42 in cutting an arc into a part? ✔✔They tell the control whether the tool is to the left or right of the feed direction.
What steps are necessary to find the Z axis coordinate for the end point of the partial arc shown? To find the Z axis location for the end of the partial arc, find the length of ✔✔Side a, then subtract it from the arc radius.
Which of the following will correctly calculate the X axis location for the center of a concave full arc, when using TNRC? ✔✔Double the arc radius and add it to the value of X at the start of the cut (X at arc center = 2 x radius + X at start).
In addition to the dimensions of the radius itself, what information must a programmer know in order to utilize tool nose radius compensation? ✔✔Tool orientation and programmed path
Why do most cutting operations on the lathe begin with a facing cut? ✔✔Program zero is usually located on the face of the part.
Which trigonometric function of a right triangle is the side opposite the angle divided by the side adjacent to the angle? ✔✔Tangent
Which of the following do standards dictate? Standards dictate the: ✔✔Language used by CNC machines and part programs.
When creating a part program, which of the following should the programmer do before recording the sequence of cutting operations? ✔✔Determine Program Zero
What term describes the sequence of commands necessary to machine a part? ✔✔Part Program
Which of the following refers to the use of computers to create scale-model drawings of parts? ✔✔Computer-aided design (CAD)
What standard allows CAD data to be translated back and forth between different vendors' CAD systems? ✔✔Initial Graphics Exchange Specifications (IGES)
In what form are toolpath instructions input into the CNC machine? Toolpath instructions are input into the CNC machine as a: ✔✔Part program
What CAD/CAM function creates route sheets, documents that guide and organize steps in manufacturing parts? ✔✔Process planning
What is the first step in the CAM process? ✔✔Determining tools and workholding
During what stage in the CAM process are coded machine instructions created and then converted into machine control data specific to a CNC machine? ✔✔Post-processing
In modern CAD processes, parts are designed: ✔✔Internally, using the design abilities of the CAD software itself.
What allows designers to see how multiple parts move together? ✔✔3D assembly modeling
What type of geometric model consists of planes that fit together to form a hollow object? ✔✔Surface model
The use of CAD/CAM reduces cycle time. Cycle time is: ✔✔The total time from the beginning to the end of your process
In CAD, what is a hard copy? A hard copy is: ✔✔A physical part drawing that is printed on paper.
What is the name of the storage method used for CAD/CAM data? ✔✔Database
What is the series of program blocks that describes the movement of a single cutting tool? ✔✔Toolpath
What is the role of a template in a part program? A template: ✔✔Stops incorrect modes from other part program sections from affecting a toolpath.
Which of the following codes is a startup code? ✔✔T codes
What is necessary to prevent serious problems from occurring due to program errors? ✔✔Proving out.
In a turning program, how does the block G01 X1.375 Z-.048 move the cutting tool? G X1.375 Z-.048 moves the cutting tool: ✔✔In a line to a 1.375 in. diameter and 0.048 in. into the face.
During a peck drilling cycle, what does the R.25 stand for? R.25: ✔✔Instructs the machine to back the tool out 0.25 in. in front of the part.
Which G code causes rapid positioning? ✔✔G
Which cutting variable speed mode is used when turning? ✔✔Constant surface speed
When using the arc center method, which code locates the X axis coordinate of an arc's center point? ✔✔I code
Which G code causes clockwise circular interpolation? ✔✔G
In a face milling toolpath, how does the block X3.39 Z0.05 F30.8 move the cutting tool? X3. Z0.05 F30.8 moves the cutting tool: ✔✔To the right to 3.39 inches and 0.05 inches above the part surface
Which of the following codes does a peck drilling cycle require? ✔✔Q code
Which of the following is a measurement of speed in a milling program? ✔✔Revolutions per minute
Which of the following program blocks causes a tool change? ✔✔T18 H18 M
Which of the following statements is true about the subprogram in this section of G code? Image ✔✔The M98 P7004 block executes the subprogram.
Which of the following codes occurs before cutting takes place in a toolpath? ✔✔S codes
Which step of part program creation happens directly after the part programmer determines the appropriate sequence of operations? The part programmer: ✔✔Plans the workholding and tooling.
A programmer is determining the X axis locations for a face milling operation using a cutter with a 2.000 in. (50.800 mm) diameter. X= -3.500 in. (-88.900 mm) at the left edge of the workpiece. The cutter must start to the left of the workpiece, with a 0.150 in. (3.810 mm) approach. What is the X axis location that should be programmed for the start of the cut? ✔✔X = -4.650 in. (- 118.110 mm)
An end mill is cutting a pocket into a workpiece. What are the likely toolpath movements that will create this pocket? ✔✔Start at pocket center, make linear cuts in the following pattern: +Y, - X, -Y, +X
A programmer is calculating the Z axis coordinate location for the total drill depth for a through hole on a 2.0 in. (50.8 mm) thick part. The tip length of the 1.0 in. (25.4 mm) diameter drill is 0. inches (7.62 mm), and it will require a 0.05 in. (1.27 mm) clearance. What is the correct Z value to program for this hole? ✔✔Z = -2.35 in. (-59.69 mm)
A programmer writes a part program to cut a 4.0 in. (101.6 mm) by 5.5 in. (139.7 mm) by 1 in. (25.4 mm) pocket into a workpiece using an end mill with a diameter of 0.5 in. (12.7 mm). After the program completes, the programmer finds that the pocket is 0.25 in. (6.35 mm) longer and wider than he had intended. What offset did the programmer forget to set? ✔✔Cutter radius compensation
A series of G codes written one after the other with the object of producing a completed workpiece is called a: ✔✔Part program
What is the purpose of a spot drill? A spot drill: ✔✔Starts and locates holes.
A programmer performs the following calculations to find a set of X and Y axis coordinates: Connect X and Y axes to hole center to form right triangle with radius as hypotenuse, where angle B is 60 degrees. Find the sine of B to find the X axis distance. Find the cosine of B to find
