10 Questions You Should to Know about cnc pipe thread lathe

A few notes:
- the taper on a pipe is 3/4" per foot. For a 1/2" pipe, that's only about 0.030" in diameter change over about 1/2". So it's really important to be accurate when setting up your lathe, or the thread won't be right. There's an input parameter for Tip Radius. If you're having trouble with loose fits, increase this a bit. It makes a big difference, since it makes the cut 2 x Tip Radius larger.

- I had a lot of trouble with a hesitation between the effective thread and the vanish thread, which could be somewhat compensated for by threading at less than 100 RPM. There's a long thread about the cause of this at

https://forum.linuxcnc.org/20-g-code/32878-hesitation-between-two-consecutive-g33-codes?limitstart=0

if you're interested. In any case, include this code in your .INI file:

[TRAJ]
   ARC_BLEND_ENABLE=0

The code includes some notes. You may have to change initialization parameters, feeds and speeds starting at line 88 for your lathe. My lathe does not have speed control, but does have a spindle encoder that I use to cut threads. There's also a check to see that you're not using Tool 0 starting at line 21. This is mostly to remind me to set up the correct tool before I start.

File Attachment:

File Name:
File Size:5 KB

File Name: npt_pipe.ngc File Size:5 KB

If you are looking for more details, kindly visit cnc pipe thread lathe.

Here's a routine for pipe threading. I'm kind of lazy, so I wrote it where ordinarily all you have to input is the nominal pipe size to use it. Everything else should be OK as is. You can also input the actual pipe size and TPI from Machinery's handbook if you want. For instance, 1/2" pipe is 0.840 OD and 14 TPI.A few notes:- the taper on a pipe is 3/4" per foot. For a 1/2" pipe, that's only about 0.030" in diameter change over about 1/2". So it's really important to be accurate when setting up your lathe, or the thread won't be right. There's an input parameter for Tip Radius. If you're having trouble with loose fits, increase this a bit. It makes a big difference, since it makes the cut 2 x Tip Radius larger.- I had a lot of trouble with a hesitation between the effective thread and the vanish thread, which could be somewhat compensated for by threading at less than 100 RPM. There's a long thread about the cause of this atif you're interested. In any case, include this code in your .INI file:The code includes some notes. You may have to change initialization parameters, feeds and speeds starting at line 88 for your lathe. My lathe does not have speed control, but does have a spindle encoder that I use to cut threads. There's also a check to see that you're not using Tool 0 starting at line 21. This is mostly to remind me to set up the correct tool before I start.

What should you do when you encounter an issue with your CNC machine tool? Should you try to fix it yourself, call the supplier of the machines, or Google for answers?

As one of Asia’s leading CNC machine tool manufacturer, we’re aware of the common problems and issues that may occur during the machining process. These run the entire gamut – from burn marks on the finishes of machined parts, power supply failure, to the “jamming” of different moving parts or inaccuracy in machined parts.

In this article, we will try to answer some of the most common problems and challenges faced in CNC machining, and suggest ways for you to solve them.

CNC Machine Tool Mistakes – The Big Four

From our experience, the bulk of the problems faced by machinists in using CNC lathes, milling machines and multi-axis machining centres revolve around four main issues.

#1 Using the Wrong Cutting Tools / Settings

Choosing the wrong cutting tool for the job may often result in poor quality material finishes. This could be seen as rough edges, cutter marks on the surface, raised marks, or burn marks on the material’s edges or corners. Extensive tool wear may result from this error.

Poor material finishes could be due to either bluntness in the tool used, or improper feed speed ratio. It may also be caused by the wrong dimensions of the tool for the job at hand in terms of the sizes, quality or match with the material.

To resolve this, it is important to choose the right tool and setting for the job and material.

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#2 Errors in Programming

As highly sophisticated equipment controlled by CNC computers, much of the issues which arise in CNC machining often comes from programming. These may come from a lack of understanding of the different G and M codes used for the controller, wrong set-up, or inputting the wrong data variables into the CNC controller.

To resolve these errors, it is important for new operators to be adequately trained in the different ways in which CNC machines can be programmed. Comprehensive user manuals and training, motion sequencing, and operation of the machine should be provided to new operators by the machine suppliers or experienced operators on the shop floor.

#3 Poor Maintenance of CNC Machine Tool

Modern machines with multiple constantly moving mechanical parts, CNC Machine Tools need to be regularly cleaned and maintained to keep them running optimally.

Failure to clear away dirt, material and other debris could result in a build-up which over time can result in inaccuracies in machining or even machine failures.

To prevent this, it is crucial for machine operators to follow a detailed maintenance regime for the machine tools in use. They should also regularly check levels of coolants or airflow, e.g. air filters, to ensure that operations continue to be smooth and uninterrupted.

Note: an overheated spindle could result from having a choked air filter in your cooling system.

#4 Inadequate Worker Skill and Training

With increasing use of computing and programming, CNC machine tool operators these days need a different set of knowledge and skills. Without the right organisational, planning and programming skills, workers are unable to optimize the yield of these machines even if they have machining skill and experience using previous models of machines in the past.

To ensure that this is resolved, you need to hire the right machine operators who can visualise and design the machining process, select the correct tools and sequences for the job, and write the programmes.

Want more information on heavy-duty cnc lathe? Feel free to contact us.