Re: [Emc-users] Single index pulse revisited

2009-05-19 Thread Steve Blackmore
On Tue, 19 May 2009 18:00:40 +0100, you wrote: Just a quick followup on my query about using a single index pulse for threading. I got it set up on my lathe with a magnet and a hall sensor. It reads the speed pretty accurately though there is a bit of jitter at higher speeds (500rpm upwards).

Re: [Emc-users] Single index pulse revisited

2009-05-19 Thread Jeff Epler
On Tue, May 19, 2009 at 09:31:46PM +0100, Steve Blackmore wrote: On Tue, 19 May 2009 18:00:40 +0100, you wrote: Just a quick followup on my query about using a single index pulse for threading. I got it set up on my lathe with a magnet and a hall sensor. It reads the speed pretty

Re: [Emc-users] Single index pulse revisited

2009-05-19 Thread Leslie Newell
Hi Steve, I'm not seeing that. At low speed, say 100rpm, the displayed spindle speed is rock steady, within 0.1rpm. Mind you I am using a low pass filter on the spindle speed display. Perhaps I should try it without the LPF. At lower speeds the distortion of the thread is less as well. I