Re:The Polar Bear – Open-Source, Multipurpose CNC Machine wi...
by londons_explore on Saturday August 21, 2021 @02:59AM
(#28254877)
One way to compensate chatter is to have a small mass (say 50 grams) on an X-Y-Z voice coil on the cutting head.
Then you can use that to apply large brief forces in whatever direction is needed to stop chatter for a few milliseconds with each turn of the cutting tool.
It's the same mechanism used in iphones "taptic engines" to make 'clicks'.
The same mechanism can be used to actuate the head at far higher frequencies, allowing cutting fine detail at high speeds.
Then you can use that to apply large brief forces in whatever direction is needed to stop chatter for a few milliseconds with each turn of the cutting tool.
It's the same mechanism used in iphones "taptic engines" to make 'clicks'.
The same mechanism can be used to actuate the head at far higher frequencies, allowing cutting fine detail at high speeds.