Inverse Time feed rates

Hi does anyone have an example of a post file S or M, that is using inverse time feed rates for a Haas 4th axis programming..?

Thanks in advance...

Hi machinster, talking of a Haas machine; input the correct diameter of the part to be machined in the Setting #34, and then all you have to program is something like this:

G01 X2.500 Y0 A131.523 F5.1

Knowing the diameter of the part, the control will interpolate both axis to reach the end of the move at the specified rate.
Here is a partial Haas post that I used for years.


name Haas 4 axis VF2 (Metric) ( BY Mario Lovato 15/04/1997 )

% 00
/ 00
O >4
N >4

A ->4.>3 Limit -8000 8000
I ->4.>3
J ->4.>3
K ->4.>3

ModalLetters X Y Z F A # List of letters that are modal

ModalGs 0 1 2 3 73 74 76 80 81 82 83 84 85 # List of g codes that are modal

StartCode
%<0>
O<Program#>
G<80> G<49> G<40>
G<28> g<91> Z<0>
G<28> g<91> Y<0> A<0>
End

1stToolChange # First tool change
T<Tool> M<6>
G<0> G<90> G<17> G<Work> X<H> Y<V> A<Rotangle>
G<43> Z<D> H<Lcomp>
M<Direct> S<Speed>
M<Cool>
End

Infeed # Enable cutter comp
G<Side> X<H> Y<V> D<DComp> A<Rotangle> F<FRate>
end

Outfeed # Disable cutter comp
G<1> G<40> X<H> Y<V>
Z<D>
end

EndCode
M<05>
M<09> # End of the program
G<0> G<49> G<90> Z<0>
G<28> g<91> Z<0>
G<28> g<91> Y<0> A<0>
M<02>
M<30>
%<0>
End

Index X # Index the rotary table
G<0> G<49> G<90> Z<0>
G<Work> X<H> Y<V> A<Rotangle>
G<43> Z<D> H<Lcomp> M<Cool>
End

UnWind # Unwind the rotary table
G<0> G<49> G<90> Z<0>
A<0>
G<43> Z<D> H<Lcomp> M<Cool>
G<0> X<LastH> Y<LastV> A<LastRotAng>
G<1> Z<LastD>
End

Should you need more info, just call me.
Good Luck.
Mario

A week ago I posted a probable solution, just in case you didn-t see it.