Pathpilot does not work out of the box. (Unless you have a tormach or a
machine setup exactly like a tormach..) If anything it is harder to
configure than linuxcnc. It isn't meant to be. It is missing stuff
that normal linuxcnc has.
There seems to be a very warped view of linuxcnc. memories of olden
days. Linuxcnc is hard they say. You have to know linux to run
linuxcnc. You have to be a programmer to use linuxcnc. That hasn't
been true for a long time.
Linuxcnc isn't that hard to setup. You just have to invest a minimal
amount of time to understand it.
and yes - single pulse threading does work with linuxcnc
https://www.youtube.com/watch?v=jHKmcjoCyLg&t=50s
sam
On 10/13/2017 07:57 PM, Chris Albertson wrote:
Andy,
Of course one pulse per revolution can work. Those who argue it can't are
likely not
thinking how to compute shaft velocity. Still, you get a tighter loop with
more pulses per revolution
and as Gene wrote, it is not hard to make an encoder.
Thanks for the hexagonal boring video. I would have never guessed this
could be
done so easy. Now of course I have a use for it and "need" the feature.
I'd been
connecting motor shafts to aluminum parts using round holes and set
screws. Now
I see I can bore a "D" shape with will ft the flat on the motor shaft.
On Fri, Oct 13, 2017 at 5:40 PM, Gene Heskett <ghesk...@shentel.net> wrote:
On Friday 13 October 2017 18:21:15 andy pugh wrote:
On 13 October 2017 at 23:13, John Dammeyer <jo...@autoartisans.com>
wrote:
The desire for the Beagle with me was originally that with LinuxCNC
and a quadrature encoder on the spindle along with the hardware QEP
handled by the PRU we'd have an awesome little lathe controller.
Alas, that's the one thing in MachineKit that hasn't been addressed
yet.
I lost track of Machinekit a while ago. Do they have any
encoder-counting facility in the PRU?
If they have then the rest is just config. (editing text files...)
Mach3 and my ELS both use one pulse per revolution for threading.
And before this starts a massive thread on how that just can't work,
it does work and as long as the spindle is reasonably steady it
works well.
Indeed, and LinuxCNC can be persuaded to work that way too.
But you obviously can't just stop the spindle mid thread and then
turn the spindle by hand manually. So there are limitations.
LinuxCNC can do this (and yes, I am turning the spindle by hand):
https://www.youtube.com/watch?v=T4q8gCpeY1A
You can also rigid tap that way, by turning off the spindle power once
the G33.1 has started, I have done it on TLM, easy because its spindle
has AC ball bearings. Weird feeling to watch the carriage following the
encoder, while you are turning the spindle by hand, in either direction.
I've now built 3 encoders from scratch, all with 240 or more A/B edges
per revolution. Usually works a treat. Or tells one quickly that its
screwed up.
Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>
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