That makes sense, you know what voltage you send to the VFD and can measure the 
spindle RPM so you can certainly figure which of the known gear ratios has been 
selected. Of course my current issue is to get the spindle to do anything under 
LinuxCNC :( It runs fine in the PnCConf test...


------Original Mail------
From: "andy pugh" <bodge...@gmail.com>
To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net>
Sent: Thu, 18 Sep 2014 15:04:58 +0100
Subject: Re: [Emc-users] Question on "gearchange" use?

On 18 September 2014 14:48,  <p...@wpnet.us> wrote:
> I There are plenty of inputs available if I wanted to put some sensors on the 
> gear shifts so LinuxCNC could tell what range it's in.

I have done it without sensors on my mill:
http://linuxcnc.org/dapper/emc2/emc2/index.php/italian/forum/47-hal-examples/27071-automatic-spindle-gear-detection

-- 
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto

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