Setting up CNC4PC C3 Index Pulse

[vlmarshall]

I'm trying to set up a spindle rev counter/index pulse on my Sherline lathe, but I can't figure out the setup. I can see the pin going high and low in EMC's HAL meter, but that's as far as I've gotten. Any ideas would be greatly appreciated.

Thanks,

-Vernon

[ssgarbi]

Good mornig

Verify in
http://wiki.linuxcnc.org/

bye

[vlmarshall]

Yeah, I'm trying... but I don't get it.

[vlmarshall]

I just can't get EMC to do anything about the spindle index pulse. It shows up in the HAL meter under spindle-index, flipping between FALSE and TRUE, but the example program "threading.ngc" just hangs at the g33 command.

[vlmarshall]

Is it even possible to thread with a single-pulse-per-rev encoder in EMC? I've found instances of people doing it with other software, but all of the EMC documentation seems to insist on a 100-count encoder, as well.

[vlmarshall]

Progress! "Andypugh" on the IRC help channel for EMC has been a LOT of help... it's actually moving with the index pulse now, although I can see where a second encoder with more pulses would greatly improve accuracy.
Still, after weeks of frustration and no answers, I'm finally getting somewhere.

[vlmarshall]

Well, it works. The Sample threading program that comes with EMC was pretty rough, but by matching the spindle speed and feedrate I was able to get good performance out of it.
Here's a (long, boring) video of my first singlepoint threadcutting with this lathe.
"http://www.youtube.com/watch?v=C8zwXztmpEc"]YouTube- CNC Sherline Lathe Threading test cut

[ArcEye]

Hi

Glad you got your problem fixed.

I have also had problems getting RPM displayed and doing anything that relies on the index pulse to work, because I can't seem to get EMC to see it properly.

Likewise I can see it switch from TRUE to FALSE in the hal meter, so it is there but not connected properly somehow

Can you share what you needed to do, a copy of your .hal and .ini would be great.

regards


ArcEye