Tutorial on feeds and speeds

(William Adams) #38


Working on it a bit more, thought this reference was nice and straight-forward, and generally useful in terms of ordering things as:

material > endmill diameter > chipload > calculated feeds and speeds

Just checking and making corrections on the calculated chipload / tooth on the wiki.

(William Adams) #39

Okay, next iteration. Using Google Forms to collect everything into a Google Docs Spreadsheet:

(William Adams) #40

Does this seem like a useful representation?


(Phil Thien) #41

That is a lot of colors with subtle differences.

Any way to add any numbers or different shapes to make it a little easier to follow?

(Julien Heyman) #42

I think this is awesome, and would indeed be awesomer if inserting numbers inside the circles and squares was doable

(William Adams) #43

Thanks! What numbers would you wish to see? You can get the values for a given point by mousing over it.

@cgallery — I’ll have to see. One can drill down to a specific datapoint by clicking on the sets you’re interested in — clicking on the material you want, is pretty effective. When we add more values I believe it will continue to be pretty effective.

(Julien Heyman) #44

Silly me, I did not realize you could click on an element in the list, and it gets highlighted. So I take back my comment, this is already awesomest :slight_smile:

(William Adams) #45


I guess the big questions are which aspects it makes sense to use for controls:

  • materials — definitely
  • endmill — not sure why I didn’t use that, but arguably:
    • diameter
    • no. of flutes make more sense
  • machine I’m not sold on, but seems an obvious thing

I’d like to have some way to select a spindle speed range — that way folks w/ a given tool could choose to see only relevant entries.

(Phil Thien) #46

Cancel my comment, I didn’t realize I could click on a material and the chart would highlight my selection.

Very neat! Thanks for doing all this work!

(William Adams) #47

My pleasure!

Feedback on which elements to provide to be clickable would be welcome, and their hierarchy / ordering.

Converting the balance of this post into a new topic — please see:

Interfaces and data and so forth
(Julien Heyman) #48

The order most useful to me would be:

  1. machine (clears out the field and one less reminder about the opportunity to spend money on a beautiful Nomad :slight_smile:
  2. material (input constraint on 99% of my projects)
  3. endmill size & #flutes (input constraint when you have a limited set and/or the features to carve demand specific sizes)
  4. min/max RPM (I personnally really dislike going to the higher RPMs range (noise!), and prefer to stick to e.g. 12.000 and adjust feedrate accordingly, when this is possible/compatible with SO max feedrate)

(William Adams) #49

Come to the Nomad side, we have fixtures.

(and peace and quiet, and an enclosure, and a tool length sensor, and ER-collets, and can use an edge finder…)

(Evan Day) #50

You can’t use an edge finder on a SO3?

(William Adams) #51

Not a mechanical one with a trim router — you can use it if you have a spindle or VFD which spins at low enough speeds — that said, I think my Nomad is jealous of the probe on my SO3 XL.

(William Adams) #52

Okay, I’ve added some more values, and adjusted things a bit further — getting a bit cluttered, but hopefully useable still.

(Julien Heyman) #53

Cool. Is it possible to make diameter a filter (like machine & material), instead of a legend/key ?

(William Adams) #54

Not that I can tell — numeric ranges seem to have a limited number of options — I suppose if I hard-code them to have the unit that would then allow that, but it would then disable using them as numbers to calculate the size of the datapoint (which aspect I like)

(Jude Marleau) #55

Your chart is easy to read, and use. I love it. All information on one screen, no scrolling, sorted amazingly. Terrific job Will, many thanks to your determined efforts. Jude

(William Adams) #57

Here’s a version with the current Carbide 3D feeds and speeds:


I’ll start in on filling in the first version from the wiki, then we’ll fill in all the gaps.

(barthelemy bach) #58

The nomad side… Shapeoko for ever !!!