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In the example below, I programmed a reduced feed rate of 2.9 IPM. My goal was to slow down the feed rate as the 3/16 end mill turned the corner. In the past, the tool path for the reduced feed rate was shown in yellow. I can see the yellow reduced feed rate at the bottom of the tool path, but why are the other similar corners still showing red?
Thanks.... Richard
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Hi
the Reduced Feedrate only applies to the Blue cutting moves not the Ramping moves.
Ramping moves only use the Ramp Feedrate
You may have used multiple depths in the past which would potentially have reduced feed on some of the coreners
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Thanks Andrew. This is the first time I attempted to use the reduced feed rate while ramping. I was not aware that it does not affect the ramp feed rate. In this example, I probably can get away without using it at all, I was just trying to optimize my feed rates.
If I reduce the feed rate for ramping, I will not be able reduce the feed rate while moving around the radius. It will reduce the feed rate for the entire tool path.
Thanks... Richard
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Typically your ramp feed rate will be much slower than your milling feed so you wouldn't need to apply a reduced feedrate for the corners anyway.
your tool is a decent amount smaller than the slot so it shouldn't be a problem.
I've only ever used Feedrate optimization a handful of times when using very long tools, in most other cases I find its not necessary.
You may have more of a need with a less rigid machine though
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Thanks for the tip. I think I once had a .5 diameter tool in a .55 diameter hole so the actual feed rate was like 10 time faster than expected so I had to use feed rate reduction. I guess when the tool is considerably smaller than the hole, there is no need for reduced feed rate. Thanks as always for your guidance.
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I dont find it necessary for ramping, only on small ID's hole with a finish callout.
Did you do the calculations for your slot and tool size?
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Thanks. I will keep that in mind. I did do the calculations. The effective speed is 1.6 times faster than the programmed speed. This is a hobby for me, and I am trying to learn the best practices as opposed to just getting the job done. Your tips are very much appreciated. I will think about the reduced feed rate only when the tool and pilot hole are close in size.
Richard
Fusion