“If you have a flat tire on a car, you fix the tire, you don’t look at the tire balance, vibration of the motor, or the paint job…”
Thoughtful follow up to our post on Vibration, Harmonics and Chatter from William R. Shaffer, VP at Conicity Technologies.
Conicity provides specialized edge prep solutions for our industry.
Here’s what Bill had to say:
“Perhaps there is some chatter that is a function of machine harmonics, but I have not seen that as of yet. My feeling is that the machines are designed and built with the high level of technology, much higher than the technology that is associated with the design of the cutting tool.
“Cutting tools used to drive the machine tool industry to higher levels of capability because the capability of the tool always exceeded the machine. Spindle speeds and rigidity often lagged tool designs and machine tools were not able to take full advantage of tool capability. That was then. Not today.
“Bottom line, machines have surpassed the tool capability and tools really have not made and significant breakthroughs to push the machine building community.
“I deal with chatter on a daily basis for our customers.
“We have successfully cured severe levels of chatter in metalcutting by addressing the micro-geometry of the cutting tool.
“At the end of the day, vibration starts at the tool because perhaps the tool geometry being suspect, friction, perhaps feed rates combined with tool design, but it starts with the tool.
“If the machine hums and vibrates when it not running a workpiece, then you do have a problem. If you have a flat tire on a car, you fix the tire, you don’t look at the tire balance, vibration of the motor, or the paint job…
“So the question I would like to explore is “what do the people that make the machine tools feel about their machines having inherent vibration and harmonics that create issues in machining?”
“What do the folks who make the machines have to say about this?
“Is the picture that many may have in their minds that “the machine has it’s own set of harmonics, so does the material that is being processed, perhaps even the tool,” valid, or not?”
Your comments please…