It surprises me that there were not much discussion about this "drawback" 
regarding TP, when trying to use it on machine and g-code with rotary axis 
moves. For example in my case I have to do an offer for milling PU foam pieces, 
where I could use higher speeds for cutting (like 2500mm/min), but 
unfortunately geometry of final pieces demands full 5-axis final cut where I 
can now reach only about 650mm/min, that means my machining time exceeds way 
over budget and I'm "out of business".


________________________________
From: Klemen Zivkovic <klemen.zivko...@gmail.com>
Sent: Monday, November 7, 2016 8:05 AM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] max_velocity during execution - multiple axis

It should complete whole combined move in 1/F minutes.
So if F=2 whole move with acc dec takes 30 secs.

In my gcode processor I calculate it from speed/distance and unit is 1/min
for each segment of toolpath. Beeing axis unitless it can be applied to
axis with different distance units.

On 7 Nov 2016 5:19 a.m., "Danny Miller" <dan...@austin.rr.com> wrote:

> How does inverse-time work?
>
> Say you specify 1 sec to do 1" for a single vector not connected to
> other cuts, so it starts/stop fully at the ends.
>
> Is that the same as F=60ipm, which will take longer due to accel/decel?
>
>
> Or does it guarantee that the whole cut will take 1 sec, which will go
> faster than 60 ipm in the middle?
>
> Danny
>
>
> On 11/6/2016 2:23 PM, andy pugh wrote:
> > On 6 November 2016 at 20:09, Danny Miller <dan...@austin.rr.com> wrote:
> >> Huh, ok, yeah inverse-time does make sense.
> > A little less sense than not-inverse time. In my opinion.
> >
>
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