I don't have 2.7 here..  But in 2.8(master) lathe sim works as expected.

This short program

G95
s100m3
g1z4f.001
g0z0
m30

Z moves to 4" at .1ipm (which seems right 100*.001=.1)
Changing the spindle speed changes the feed.

Looking at hal in the lathe sim - the motion.spindle-speed-in is hooked 
to a low-passed spindle encoder velocity.

sam



On 12/9/2014 6:38 AM, Karl Jacobs wrote:
> Thanks for the info. If I disconnect spindle-speed-in, G76 and G33 stop
> working too, so they seem to need both signals somehow, but from what
> you say that still does not necessarily mean that G95 must work as well.
> I rather suspect the motion planner. Maybe someone can verify if G95
> works in the non-machinekit linuxcnc version? I will post to the
> machinekit list as well.
> Am 09.12.2014 um 12:24 schrieb andy pugh:
>> On 9 December 2014 at 08:53, Karl Jacobs <[email protected]> wrote:
>>
>>> I can rule out hardware problems of an encoder by using a hal siggen
>>> component to drive the hal encoder inputs (Phase A and Z, counter mode)
>>> to simulate the spindle speed signal. That must be working correctly
>>> because G76 and G33 both give the right result (my X and Z axis
>>> components drive a real lathe so I can watch and check the motions).
>>>
>> G76 and G33 use motion.spindle-revs, and G95 uses motion.spindle-speed-in
>> So, it is possible to have a fully functional G76 and G33 but not have a
>> working G95.
>>
>> It is possible that this is due to the new motion planner.
>>
>> It is also possible that this is a Machinekit-only problem. Machinekit has
>> now diverged considerably from LinuxCNC, and your query should probably be
>> directed to the Machinekit mailing list.
>>
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