CNC Machine

16/10/2025

This image shows the main parts of a thread on a screw or threaded shaft. Each labeled term represents an important measurement used in thread design and manufacturing. Here’s the explanation:

1. Major Diameter
→ The largest diameter of the thread, measured from the crest (top) of one thread to the crest on the opposite side.
→ It is also called the outside diameter, and it’s the size usually referred to when specifying a screw (for example, M10 means a major diameter of 10 mm).

2. Minor Diameter
→ The smallest diameter of the thread, measured from the root (bottom) of one thread to the root on the opposite side.
→ This dimension determines the core strength of the screw or shaft since it bears the tensile load.

3. Pitch Diameter
→ A theoretical diameter where the thickness of the thread and the space between threads are equal.
→ It is crucial because it determines how well two mating threads (such as a screw and a nut) fit together.

4. Pitch
→ The distance between one thread crest and the next crest, measured parallel to the thread axis.
→ The pitch defines how fine or coarse the thread is; a smaller pitch means a finer thread.

5. Depth
→ The vertical distance between the crest (top) and the root (bottom) of the thread.
→ Thread depth affects the strength and load-carrying capacity of the thread.

🧩 Conclusion:
This image explains the basic geometric parameters of a thread, which are essential in the design, manufacturing, and measurement of screws, nuts, and other threaded components. These parameters ensure proper fitting, secure locking, and optimal mechanical strength.

16/10/2025

16/10/2025

The image explains the G82 Counterbore Cycle used in CNC (Computer Numerical Control) machining.

Here’s the explanation:

🔹 Function of G82
The G82 code is used for counterboring or spot facing operations, where the tool pauses at the bottom of the hole to create a flat and smooth surface before retracting.

🔹 Command format:
G82 X... Y... Z... R... P... F...

🔹 Parameter descriptions:

X, Y: Coordinates of the hole position.

Z: Depth of the hole to be drilled.

R: Retract point value, the height to which the tool returns after drilling.

P: Dwell time at the bottom of the hole (in milliseconds, e.g., P1000 = 1 second pause).

F: Feedrate, the speed at which the tool moves downward during drilling.

🔹 Working sequence of G82:

1. The tool moves rapidly to the R position.

2. It feeds down at the programmed feedrate (F) to the Z depth.

3. The tool pauses for the dwell time specified by P.

4. It then retracts quickly to the R position.

🔹 Summary:
The image illustrates an automatic drilling cycle with a dwell at the hole bottom, commonly used in counterboring operations on CNC machines.

15/10/2025

15/10/2025

Which one is better???

15/10/2025

15/10/2025

14/10/2025

What Happen My Operator???

14/10/2025

What is the reading of this size???

14/10/2025

14/10/2025

This image illustrates the calculation of the Spiral Cutting Length (SCL) in a thread turning or helical cutting process on a CNC lathe.

Here’s the explanation of each element in the image:

1. Dm1 – Mean diameter of the workpiece (mm)
→ The diameter of the section being cut or threaded.

2. lm – Cutting length (mm)
→ The total axial length over which the tool moves along the workpiece surface.

3. fn – Feed per revolution (mm/rev)
→ The distance the cutting tool advances during one full revolution of the workpiece.

4. SCL (m) – Spiral Cutting Length
→ The total length of the spiral path traveled by the cutting tool during the machining process.

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Formula:

SCL (m) = \frac{D_{m1} \times \pi}{1000} \times \frac{l_m}{f_n}

Formula explanation:

→ calculates the circumference of the workpiece (in meters).

→ determines the number of revolutions needed to complete the cutting length.

Multiplying both gives the total spiral cutting length (SCL) traveled by the tool.

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Conclusion:

The image explains that during the threading or helical turning process, the cutting tool moves along a spiral path on the surface of the workpiece.
The SCL formula is used to calculate the total distance traveled by the tool, which is important for:

Estimating machining time,

Analyzing tool wear, and

Determining machining efficiency.

13/10/2025