How-To: Feed Rate Calculation

[Swarfing]

Which bit?

[motoxy]

Which bit?

Your right, I am being very delusional!!

[Swarfing]

lol......:lmao:

[Fivetide]

Is it just me or does anyone else think Lees hot ?

[JAZZCNC]

Is it just me or does anyone else think Lees hot ?

What you smoking.!!!!!!

[Fivetide]

What you smoking.!!!!!!

Actually I'm vaping now , quit smoking the 40 a day death tabs 3 years ago at Christmas .. same time I quit drinking :) now I'm just an old boring bastard lol

[Clive S]

now I'm just an old boring bastard lol

Glad you joined the club

[James Anwar]

Mr Lee: I am cutting composit door but every 2 or 3 door machine start chipping from top and bottom and some how tool broken advise me what type of bit do I use to get extremely fine cutting and bit last for a month at least as well

[Lee Roberts]

Mr Lee: I am cutting composit door but every 2 or 3 door machine start chipping from top and bottom and some how tool broken advise me what type of bit do I use to get extremely fine cutting and bit last for a month at least as well

Hi,

I would try a compression bit/cutter, their flute's have upcut and downcut spirals all on one cutter, so down shear cutting on the top of your material and an up shear cut on the bottom of the material.

You can also get spiral up only and spiral down only, the choice of cutters is great now days, so always select the best cutter for the job/operation.

Of course you need to be using the right speeds and feeds or it won't matter what cutter you use.

[Muzzer]

If you have a smartphone, there are speeds and feeds apps from all the big names there for free, such as Iscar, Mitsubishi, Sandvik etc. Check out the app store.

If you use Fusion, you can enter stuff like the surface speed and feed per tooth from the cutter manufacturer's site and it will do a lot of the calcs for you. You still need to experiment to see what your machine can do but unless you start with manufacturer's data you may not have a clue what the cutter can do or where it likes to work. Some of the modern cutters are pretty amazing when you use them with modern adaptive toolpaths.

I don't use CNC cock book myself. Bob Whorefields seems to be a bit of a knob and I've seen a fair bit of feedback suggesting that a lot of the numbers come out all wrong. If you have Fusion for free, there is no need anyway.

Admittedly this is for cutting metal and plastic, as I don't deal with The Brown Stuff myself.