Hi
Have been using mach3 mill and lathe for a lot of years with Windows XP.
On changing to win 7 and above I cannot get the rpm readout to work on mach 3 turn.
Not concerned on the mill but need it to work on the lathe.
Any ideas gratefully appreciated
Colin

What spindle sensor are you using and what is the debounce parameter set to?

many thanks for your prompt reply
I am away at the moment.
have a magnet on the spindle with pickup that I made, not  sure  of the
debounce setting but did try a lot of different ones
will check when I get back
colin

OK, assuming that the pickup is a Hall Effect device you shouldn't need much if any debounce.  (On the other hand if it's a reed switch then I suggest you use a hall device instead!)

I've recently switched to using UC100 motion controllers on my lathe and mill, but more importantly replaced the lathe motor with 3 phase and VFD.  Because this is much smoother I can now use the high speed range.  I soon found the rpm reading didn't work on high speeds as the debounce was set too long.  I just reduced it to something very short and the speed indicator works fine - so something to try?  I use a slotted disc and opto interrupter, and essentially there's no bounce at all so no need to debounce.

many thanks for that info John
it is hall effect that i used.
have not tried 0 debounce ,
have converted to vfd motor some time ago, had a few probs gearing it down
as it  is a 1950s harris 11" swing lathe , keeps trashing the idler bearings as is too fast for them.
in the process of setting up a windows 7 computer, so will have another go when that is ready.
colin