PM Blog

Harmful harmonic frequencies can cause chatter, especially when turning long, small-diameter workpieces or creating threads in them. The Spindle Harmonics Control feature in Hurco’s version 11 WinMax CNC software can prevent this by automatically varying spindle speed in areas where chatter was present to achieve better surface finishes and tool life.

For example, chatter might not be an issue when turning a shaft with a relatively large diameter close to the chuck. However, an operator might notice that it is a problem when turning a smaller diameter further away from the chuck where there’s less rigidity. The Spindle Harmonics Control function can be set to oscillate the programmed spindle speed between 100% and a lower or higher percentage for a certain period of time so as not to introduce the harmonics that cause chatter. This function is activated by an M83 code that is inserted before the problem data block and deactivated with an M84 code that is added after that block. That way, an operator doesn’t have to remain at the machine manually adjusting the feed rate override accordingly. Instead, if chatter is noticed during initial runs of a new job, the function can be added to the program.

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The Story Behind a Machining Background Photo

I had to make a number of changes when I joined the Production Machining editorial team. Picking a new background photo for my LinkedIn page was not high on my list of things to do, but it was on my list, nonetheless.

Over the years, I have visited a number of shops with Swiss-types and turn-mills, so I knew I had taken multiple photos that might be well-suited. When I revisited this story about Alpha Manufacturing and Design’s use of a Nakamura-Tome Super NTMX bar-fed turn-mill with B-axis milling spindle, lower tool turret, and main and subspindles of equal horsepower, I found the photo shown above. (These machines are distributed by Methods Machine Tools.)

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5 Tips for Maintaining a Virus-Free Workplace

Keeping employees safe and healthy are always concerns within the manufacturing cleaning industry, but especially during the coronavirus outbreak. Here, Tom Forsythe, executive vice president, Kyzen Corp., provides some suggested guidelines on how to be successful when doing so.

For more information about the effects of COVID-19 in manufacturing, visit Gardner Business Media Inc.’s coronavirus coverage blog.

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Is Cleaning with Solvent More Beneficial than Aqueous Cleaning?

Aqueous cleaning has been used as a method for precision cleaning for a long time, but its efficiency and sustainability has been debated through the years compared with its solvent-based alternative. To understand both cleaning methods, Venesia Hurtubise, technical chemist, MicroCare Corp., has compiled the following details about both processes.

Aqueous cleaning, or water-based cleaning, is particularly useful when combining the cleaning process with other procedures such as depositing rust preventers and brightener coatings. However, because the power to clean with water alone is weak, water is treated with a variety of compounds, including detergents or surfactants, builders, emulsifiers, saponifers, sequestering agents and chelating agents to strengthen its cleaning ability.

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Aqueous Processes Offer Safe, Effective Cleaning

Increasing environmental concerns and safety issues associated with chlorinated solvents is leading many manufacturers to consider aqueous cleaning processes. Ozone depletion, worker safety considerations and updated regulations from the Environmental Protection Agency (EPA) and Occupational Safety and Health Administration (OSHA) regarding air, water and soil contamination are all concerns of companies using chlorinated solvent cleaners.

Hubbard-Hall offers the following information to help precision machine shops understand ultrasonic and mechanical cleaning, which are aqueous processes that can replace chlorinated solvent cleaning.

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