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Author Topic: Rpm read out in mach 3 I  (Read 426 times)

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Rpm read out in mach 3 I
« on: April 23, 2022, 09:58:02 AM »
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
Re: Rpm read out in mach 3 I
« Reply #1 on: April 23, 2022, 02:51:10 PM »
What spindle sensor are you using and what is the debounce parameter set to?
Re: Rpm read out in mach 3 I
« Reply #2 on: April 24, 2022, 01:16:56 PM »
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
Re: Rpm read out in mach 3 I
« Reply #3 on: April 24, 2022, 01:31:39 PM »
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.
Re: Rpm read out in mach 3 I
« Reply #4 on: April 28, 2022, 09:45:00 AM »
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.