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CNC

Canned Cycles 310

This class describes the operation of common canned cycles that appear on machining and turning centers. Includes an Interactive Lab.

Difficulty Advanced
Format Online
Number of Lessons 17
Language English

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Objectives
The Purpose of Canned Cycles
Types of Canned Cycles
Holemaking Cycles
Drilling
Drilling with Dwell
Peck Drilling
Tapping
Boring/Reaming
Incorporating Holemaking Cycles
Basic Turning Cycles
Rough Turning and Facing
Rough Profile Turning
Finish Turning/Facing
Threading
Milling Canned Cycles
Summary

Identify the advantages of canned cycles.
Explain the degree of canned cycle standardization.
Describe general tool movements for hole-making canned cycles.
Demonstrate the operation of a drilling canned cycle.
Demonstrate the operation of a drilling canned cycle with a dwell.
Demonstrate the operation of peck drilling canned cycles.
Demonstrate the operation of tapping canned cycles.
Demonstrate the operation of boring/reaming canned cycles.
Explain how hole-making canned cycles are commonly used.
Demonstrate the operation of basic turning and facing canned cycles.
Demonstrate the operation of multiple repetitive turning and facing canned cycles.
Demonstrate the operation of a multiple repetitive profile turning canned cycle.
Demonstrate how a finishing canned cycle is used with multiple repetitive cycles.
Demonstrate the operation of a multiple repetitive threading canned cycle.
Identify common types of milling canned cycles.

Vocabulary Term

Definition

canned cycle

A sequence of machine operations initiated by a single G code. Canned cycles act as shortcuts that simplify the program.

clearance plane

A common term for the distance specified by the R level.

conversational programming

A programming method that allows an operator to machine a part by responding to a series of questions and prompts. Conversational programming does not reveal the actual program codes.

counterboring

A hole-making operation that enlarges one end of a previously drilled hole to a certain depth. The enlarged end contains a flat interior.

depth of thread

The distance between the top and bottom of the thread.

dwell

An intentional time delay during which the rotating tool remains in contact with the workpiece. A dwell can be used to improve the finish of a hole.

initial level

The imaginary plane parallel to the X- and Y-axes that indicates the tool position as the canned cycle is initiated. The initial level is typically located above the R level.

lead

The linear distance that the tool advances with one rotation of the spindle.

left-hand tap

A tap that rotates counterclockwise as it enters the hole to cut a thread.

live tooling

Power-driven cutting tools such as end mills and drills that are held in the turret of a lathe. Live tools can perform machining operations off the part centerline while the workpiece is held in the spindle.

mode

A programmed function that stays in effect until it is either cancelled or substituted with another function.

multiple repetitive cycle

A canned cycle for the lathe that uses a single block of code to automatically execute a series of tool passes.

peck drilling

A drilling operation that periodically retracts the tool to clear chips or flood the hole with coolant. Peck drilling is often used for holes that are three or four times deeper than the drill diameter.

R level

The imaginary plane parallel to the X- and Y-axes indicating the safe distance for rapid tool movement from one operation to the next. A typical R level is 0.1 inches away from the part surface.

right-hand tap

A tap that rotates clockwise as it enters the hole to cut a thread.

spot drilling

The use of a shorter, sturdier drill to locate a hole for drilling. Spot drilling often uses a drill size slightly larger than the hole diameter to leave a chamfer after the hole is drilled.