Download NIMS MACHINING CERTIFICATION PRACTICE SET 2026 FULL SOLUTION and more Exams Computer Numerical Control in PDF only on Docsity!
NIMS MACHINING CERTIFICATION PRACTICE
SET 2026 FULL SOLUTION
โ minus (-)X. Answer: A jog key that moves the spindle along the X- axis in the negative direction. โ +Y. Answer: A jog key that moves the spindle along the Y-axis in the positive direction. โ minus (-)Y. Answer: A jog key that moves the spindle along the Y- axis in the negative direction. โ +Z. Answer: A jog key that moves the spindle along the Z-axis in the positive direction. โ minus (-)Z. Answer: A jog key that moves the spindle along the Z- axis in the negative direction. โ +A. Answer: A jog key that rotates machine components around the A-axis in a positive direction. Not all Haas mills are equipped with a fourth A-axis.
โ minus (-)A. Answer: A jog key that rotates machine components around the A-axis in a negative direction. Not all Haas mills are equipped with a fourth A-axis. โ +B. Answer: A jog key that rotates machine components around the B-axis in a positive direction. Not all Haas mills are equipped with a fifth B-axis. โ minus (-)B. Answer: A jog key that rotates machine components around the B-axis in a negative direction. Not all Haas mills are equipped with a fifth B-axis. โ +10 FEEDRATE. Answer: An override key on the Haas control that increases the current feed rate in 10% increments. โ minus (-)10 FEEDRATE. Answer: An override key on the Haas control that decreases the current feed rate in 10% increments. โ 100% FEEDRATE. Answer: An override key on the Haas control that sets the feed rate back to 100% of the programmed value. โ +10 SPINDLE. Answer: An override key on the Haas control that increases the current spindle speed in 10% increments.
โ Alarm 177. Answer: An alarm code on the Haas control that indicates the machine is experiencing an overheating condition. Alarm 177 initiates auto-shutdown after 4.5 minutes. โ ALARM/MESGS. Answer: The display key on the Haas control that shows the current alarms when pressed once and messages when pressed twice. โ alpha keys. Answer: The area of the control keypad that allows an operator to enter letters and special characters into the control. โ AUTO ALL AXES. Answer: In zero return mode, the key that returns and initializes all axes to machine zero. โ Auto Power Off Timer. Answer: Setting 1. A setting that indicates how many minutes of idle time must lapse before the machine is automatically turned off. โ AUX CLNT. Answer: A jog key that turns on the Through Spindle Coolant system when in MDI mode. Pressing this key again shuts off the system. โ block delete. Answer: A machine control that provides the option of skipping a predetermined series of program blocks. A block delete allows the operator to run two versions of the same program.
โ bracket. Answer: [ ]. Punctuation marks used to separate CNC program commands from user comments. โ CANCEL. Answer: A key on the Haas control that backspaces the cursor to delete the last character entered or cancels any program block that is highlighted during a block edit. โ CCW. Answer: An override key on the Haas control that starts the spindle in the counterclockwise direction. โ chip auger. Answer: A rotating shaft with a helical blade that removes chips from the machine. โ chip conveyor. Answer: A moveable belt that helps to remove chips from the machine. โ CHIP FWD. Answer: A jog key that causes the chip auger to remove chips from the machine. โ CHIP REV. Answer: A jog key that causes the chip auger to move in the opposite direction. โ CHIP STOP. Answer: A jog key that causes the chip auger to stop.
โ control panel. Answer: The group of controls on a CNC machine that run, store, and edit the commands of a part program and other coordinate information. โ coolant. Answer: A substance that is used to prevent a workpiece from reaching excessively high temperatures during machining. โ Coolant Override. Answer: Setting 32. A setting that controls how the coolant pump operates. โ CURNT COMDS. Answer: The display key on the Haas control that shows fifteen lines of the current program, modal program values, axis positions, and the position during runtime. โ cursor keys. Answer: The area of the control keypad that allows an operator to move through various screens and fields in the control, edit and search for CNC programs, and move the cursor up, down, left, and right through the program or screen options. โ CW. Answer: An override key on the Haas control that starts the spindle in the clockwise direction. โ CYCLE START. Answer: The control button used to begin a program or continue a program that has been previously stopped.
โ diagnostic. Answer: Information that is vital to routine machine maintenance. โ Direct Numerical Control. Answer: The direct control of CNC machines by a large central host computer. With DNC, the program is run directly from the memory of a host computer and is not stored in the memory of the machine's own control. โ display keys. Answer: The area of the control keypad that allows the operator to show different information, such as offsets, machine settings, and the current program. โ display screen. Answer: The main screen of the machine that displays important information for the operator. โ EDIT. Answer: An operation mode key that allows manual editing changes in a program or the creation of new program in memory. โ EMERGENCY STOP. Answer: Used for emergencies only, the control button that automatically shuts down all machine functions. โ END. Answer: A cursor arrow key that moves a program quickly to its end or moves to the bottom of most displays.
โ HANDLE CONTROL SPINDLE. Answer: An override key on the Haas control that allows the operator to adjust spindle speed in 1% increments using the HANDLE. โ HANDLE JOG. Answer: An operation mode key that allows for the manual operation of tool movement via the handwheel or jog buttons. โ help. Answer: Information intended to answer operator questions and solve common problems with machine function. โ HELP/CALC. Answer: The display key on the Haas control that brings up an information manual when pressed once and various machining calculators when pressed twice. โ HOME. Answer: A cursor arrow key that moves a cursor quickly to its beginning or moves to the top of most displays. โ home position. Answer: Another name for machine zero, the position located at the farthest possible distance in a positive direction along the machine axes. This position is permanently set for each particular CNC machine.
โ input buffer. Answer: A temporary location at the lower left corner of the computer screen that holds all incoming information before it continues to the CPU for processing. โ Jog Handle to Single Block. Answer: Setting 104. A setting that, when activated, allows an operator to use the jog handle to single step through a program. โ jog keys. Answer: The area of the control keypad that allows an operator to move a selected axis. โ JOG LOCK. Answer: A jog key that, when pressed simultaneously with a specific axis jog key, moves the axis in a continuous motion without the need to hold down the axis key. Another press of JOG LOCK stops jogging motion. โ LIST PROG. Answer: An operation mode key that lists programs and allows an operator to select, send, receive, and delete programs. โ M codes. Answer: A code used to signal an action from a miscellaneous group of commands. M codes change cutting tools, turn on or turn off the coolant, spindle, or workpiece clamps, etc. โ M08. Answer: An M code that turns coolant on.
โ MILLING/TAPPING calculator. Answer: A machining calculator that helps an operator calculate any of a number of variables, including surface feet per minute, cutter diameter, revolutions per minute, feed, thread pitch, chip load, and the number of flutes. โ NEXT TOOL. Answer: A function key that is used to select the next tool only after pressing TOOL OFSET MESUR while in the OFSET display and HANDLE/JOG mode. โ numeric keys. Answer: The area of the control keypad that allows an operator to enter numbers and special characters into the control. โ OFFSET. Answer: The display key on the Haas control that shows the various programmed offsets. โ offsets. Answer: A numerical value stored in the CNC controls that repositions machine components. Offsets are used to adjust for variations in tool geometry, part size, tool wear, etc. โ operation mode keys. Answer: The area of the control keypad that allows an operator to choose a particular operating mode, which in turn indicates what tasks the machine will perform.
โ overrides. Answer: The area of the control keypad that adjusts a programmed speed or feed rate by a certain percentage during operation. โ PAGE DOWN. Answer: A cursor arrow key that changes displays or moves down one program page. โ PAGE UP. Answer: A cursor arrow key that moves one page up in the displays or moves up one program page. โ PARAM/DGNOS. Answer: The display key on the Haas control that shows machine parameters when pressed once and diagnostics when pressed twice. โ parameters. Answer: One of the limits or physical properties that determine function and operation of a CNC machine. โ parentheses. Answer: ( ). Curved brackets used to separate program text information from CNC program commands. โ part program. Answer: A series of instructions used by a CNC machine to perform the necessary sequence of operations to machine a specific workpiece.
โ PRGRM/CONVRS. Answer: The display key on the Haas control that causes program blocks of the current selected part program to display on the CRT. โ rapid. Answer: Moving machine components at the fastest possible rate of travel. โ rapid traverse motion. Answer: The movement of machine components at the fastest possible rate of travel. Rapid traverse motion merely requires an endpoint for the movement. โ RESET. Answer: A reset key that stops all machine motion and places the program cursor at the top of the current program. โ reset keys. Answer: The area of the control keypad that executes functions vital to the beginning and end of a machining operation. โ SETNG/GRAPH. Answer: The display key on the Haas control that lists settings when pressed once and presents dry run information when pressed twice. โ setting. Answer: A CNC machine control function that an operator can activate, deactivate, or change to suit specific machining conditions.
โ Setting 1. Answer: Auto Power Off Timer. A setting that indicates how many minutes of idle time must lapse before the machine is automatically turned off. โ Setting 104. Answer: Jog Handle to Single Block. A setting that, when activated, allows an operator to use the jog handle to single step through a program. โ Setting 2. Answer: Power Off at M30. A setting on the Haas control that powers down a machine when the program reaches an M code. โ Setting 32. Answer: Coolant Override. A setting that controls how the coolant pump operates. โ Setting 81. Answer: Tool at Power Down. A setting that indicates which tool will occupy the spindle when the machine is powered down. โ SPACE. Answer: A key on the Haas control that enters a space in the input buffer. โ speed. Answer: The rate that the cutting tool or workpiece moves at the point of contact.
โ TOOL OFSET MESUR. Answer: A function key that is used to enter the present Z-location for the tool length offsets in the offset page during part setup. โ TOOL RELEASE. Answer: A function key that releases the tool from the spindle when in the MDI, handle jog, or zero return mode. โ TRIG calculator. Answer: A machining calculator that helps an operator make calculations involving the measurements and relationships of a triangle and its parts. โ WRITE/ENTER. Answer: A key on the Haas control that acts as a general enter key. WRITE/ENTER also acts as an insert key during editing. โ ZERO RET. Answer: An operation mode key that searches for machine zero or rapid returns to machine zero automatically. โ
