Is a conventional lathe a 1.5 axis machine tool?

In summary, on a lathe, the cutting tool can be moved in the horizontal plane (x and y axes) and x and y are the 2 axes. However, some consider a lathe to be a 1.5 axis machine, which may refer to the length of the lathe travel. In the case of mills with more than 6 axes, the tool and table movements along x are counted as separate axes, even though they produce the same relative motion. It is good to ask questions and learn about these concepts. A good book to learn about these topics is "CNC Machining Handbook: Building, Programming, and Implementation" by Alan Overby.
  • #1
Mohankpvk
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In a lathe, the cutting tool can be moved in the horizontal plane(x and y axes).So x and y are the 2 axes.
But one of my teachers said that lathe is a 1.5 axis machine.Is it right?
Why are conventional drilling press,shaper and planer half axis machine tools?
 
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  • #2
it is good for you to ask questions. it is how we learn.

From a very good machine tool publication-
https://www.practicalmachinist.com/vb/cnc-machining/definition-each-lathe-axis-152203/

On a lathe it is standard for the Longitudinal to be Z and the Radial to be X. Vectors are I and K

The axis parallel to the spindle axis is always Z, whether its a mill or lathe. And, for the lathe, the axis that controls the diameter is always X.

And the Lathe rotary axis conform to the standard of A rotates around X, B around Y, and C around the Z.
C is the most common on a Lathe, as it relatively easy to turn the chuck into a C axis.



your teacher may be referring to the length of the lathe travel. I have sold coordinate measurement machines and these are typically described in length of travel. so see if the lathe can traverse 1.5 meters or 60 inches.
 
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  • #3
Ask your teacher what is needed to make a lathe a 2 axis machine.
Or ask the teacher to name a 2 axis machine.
 
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  • #4
a manual lathe is a '1.5 axis' machine, in machinist parlance. It has 2 axes of motion, but only 1 can be (usefully) operated at a time. A lathe with CNC on X and Y can coordinate motion, and is a 2-axis machine.
 
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  • #5
Dullard said:
a manual lathe is a '1.5 axis' machine, in machinist parlance. It has 2 axes of motion, but only 1 can be (usefully) operated at a time. A lathe with CNC on X and Y can coordinate motion, and is a 2-axis machine.
Nice answer.I have another doubt.
In case of mills with more than 6 axes,the tool movement along x and the table movement along x (both have separate actuators) are counted as two different axes.But both these movements produce the same relative motion between the tool and the workpiece.Why are they considered different?
Please suggest a good book to learn about these.
 
  • #6
Ranger Mike said:
it is good for you to ask questions. it is how we learn.

From a very good machine tool publication-
https://www.practicalmachinist.com/vb/cnc-machining/definition-each-lathe-axis-152203/

On a lathe it is standard for the Longitudinal to be Z and the Radial to be X. Vectors are I and K

The axis parallel to the spindle axis is always Z, whether its a mill or lathe. And, for the lathe, the axis that controls the diameter is always X.

And the Lathe rotary axis conform to the standard of A rotates around X, B around Y, and C around the Z.
C is the most common on a Lathe, as it relatively easy to turn the chuck into a C axis.



your teacher may be referring to the length of the lathe travel. I have sold coordinate measurement machines and these are typically described in length of travel. so see if the lathe can traverse 1.5 meters or 60 inches.
Nice answer.
 
  • #7
Technically its a 4 axis machine, since the tool can be moved in/out up/down (although rare on newer models) and left/right and the piece can be rotated at different speeds. At least this is how it would be determined in robotics. But what you or your teacher call it is academic, it is what it is whether we call its a 1.5 axis machine or a 4000 axis machine.
 
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  • #8
Mohankpvk said:
Nice answer.I have another doubt.
In case of mills with more than 6 axes,the tool movement along x and the table movement along x (both have separate actuators) are counted as two different axes.But both these movements produce the same relative motion between the tool and the workpiece.Why are they considered different?
Please suggest a good book to learn about these.
rotating about the x y z axes make up the 4th 5th and 6th axis. it has nothing to do with the tool moving and the table moving.
 

1. What is a conventional lathe?

A conventional lathe is a machine tool used to shape objects by rotating them against a cutting tool. It is commonly used for turning, drilling, and boring operations.

2. What does 1.5 axis mean in relation to a lathe?

The term 1.5 axis refers to the number of axes of motion that a machine tool is capable of moving along. In the case of a lathe, this typically includes the X-axis for horizontal movement and the Z-axis for vertical movement, with the 1.5 axis representing partial movement along the X-axis.

3. How does a conventional lathe differ from other machine tools?

A conventional lathe differs from other machine tools in that it is primarily used for rotating workpieces and cutting them with a stationary tool. Other machine tools, such as milling machines, use rotating tools to cut stationary workpieces.

4. What types of materials can be machined with a conventional lathe?

Conventional lathes are capable of machining a wide range of materials, including metals, plastics, and wood. The specific type of material that can be machined will depend on the capabilities of the lathe and the cutting tools being used.

5. Are conventional lathes still used in modern manufacturing?

Yes, conventional lathes are still widely used in modern manufacturing, alongside more advanced CNC (computer numerical control) lathes. They are particularly useful for simpler machining tasks and are often more affordable for smaller businesses.

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