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Reduced Feed Rate Graphic Representation

richardsalzman
Collaborator

Reduced Feed Rate Graphic Representation

richardsalzman
Collaborator
Collaborator

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

 

 

richardsalzman_2-1729731176820.png

 

 

 

 

richardsalzman_0-1729730829005.png

 

 

richardsalzman_3-1729731240330.png

 

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a.laasW8M6T
Mentor
Mentor

Hi

 

the Reduced Feedrate only applies to the Blue cutting moves not the Ramping moves.

 

Ramping moves only use the Ramp Feedrate

alaasW8M6T_0-1729731881267.png

 

 

You may have used multiple depths in the past which would potentially have reduced feed on some of the coreners 

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richardsalzman
Collaborator
Collaborator

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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a.laasW8M6T
Mentor
Mentor
Accepted solution

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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richardsalzman
Collaborator
Collaborator

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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programming2C78B
Advisor
Advisor

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? 

Please click "Accept Solution" if what I wrote solved your issue!
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richardsalzman
Collaborator
Collaborator

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

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