It would help if you post the code and the invocation of the component on
pastebin.com
what you would want to do is:
- pass the device *name* as an command line argument to the component
- open the device
- use the resulting *file descriptor*
for examples how to pass command line arguments in
Wow, that's cool.but all I wanna do is index to drill
and chamfer a cross hole in a small 'hitch pin'.
Simple stuff comparatively, but a lot less work in the
lathe instead of a second operation in a mill w/ indexer
dk
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Years
andy pugh wrote:
> On 4 July 2012 21:37, Ralph Stirling wrote:
>
>
>> My thought is that it should use the C encoder all the time,
>> but with a velocity mode for normal turning, threading, and
>> CSS. Encoder rollover would be needed, but 64 bits should
>> handle an awful lot of revolutions o
Terry Christophersen wrote:
> I dont know how this is done on newer lathes but Ive seen
> older ones with an electric clutch on the spindle that engages
> and a seperate servo motor that does the milling or positioning moves
> then disenguages for normal lathe turing.
> Could an encoder be put on a
andy pugh wrote:
> Given that, I think it has got to the point where a custom HAL module
> is called for which mediates the position feedback.
Yes, that sounds right.
> The spindle doesn't have an f-error problem. I guess you could just
> ignore f-error on A too, and short-circuit the feedback.
>
Years ago I read an article on a guy that used a small lathe to make
the hundreds of 'pull stop handles' they needed for rebuilding large
pipe organs.
... A great use of CNC work! A simple thing, but they needed so many
that doing them by hand was problematic.
---
I use it and it works good. It is much easier to generate the g code in cam,
there are not a lot of lathe specific canned cycles yet.
I have not done anything too complicate, just machined flats on the od.
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On Jul 4, 2012, at 6:49 PM, "k...@gmail.com" wrote:
> Searched You
Figured it out!
I added a little G1 X+0.02 (mm) to push the probe against the materiel before
doing the retract; I guess that, sometimes, the touch probe is on the verge of
being either on/off and the slightest bit of vibration will change state.
Adding the little "push" made the probe routine
Google "c axis lathe" and you'll get plenty of examples.
The convention for identifying axes on a CNC lathe is
X perpendicular to spindle centerline, Z along spindle
centerline, so C is spindle rotation. A-axis would be the
rotation of a live tool for drilling into the side of your
work (rotation
Ah!
I should have read the latest posts!
Guess it's referred to as A axis not C ??
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Searched Youtube and Google for any info or examples of
the use of C axis in Lathe but found nothing.
Any one using it and how well does it work?
Thanks!
dan k
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On 4 July 2012 21:37, Ralph Stirling wrote:
> My thought is that it should use the C encoder all the time,
> but with a velocity mode for normal turning, threading, and
> CSS. Encoder rollover would be needed, but 64 bits should
> handle an awful lot of revolutions of the spindle.
Rollover is a
It is really a C axis lathe being described I believe (spindle
rotates about Z), and a C axis live tooled lathe is such a
mainstream machine in the industrial world that it seems a
shame not to have a robust, well-thought-out LinuxCNC
configuration for this application.
My thought is that it shoul
I dont know how this is done on newer lathes but Ive seen
older ones with an electric clutch on the spindle that engages
and a seperate servo motor that does the milling or positioning moves
then disenguages for normal lathe turing.
Could an encoder be put on a the servo(except for the index pulse)
On 4 July 2012 21:00, Jon Elson wrote:
> And, how to do this without causing a momentary huge following error
Ah, yes. Good point.
Given that, I think it has got to the point where a custom HAL module
is called for which mediates the position feedback. (though another
mux to short-circuit the fe
andy pugh wrote:
> The behaviour would then be that the axis would move in A-word control
> until an M3 or M4, at which point the mux would direct the speed PID
> to the PWM generator. On M5 the mux would switch to the old A-axis
> position control, the oneshot would trigger, loading a "true" to th
On Wednesday 04 July 2012 14:32:06 Schooner did opine:
> Hi
> I have been playing with a C userspace component to pass values from
> Linuxcnc to an arduino for display on a pendant LCD.
>
> The code works perfectly from a commandline program but when inserted
> into a component, it compiles and r
Hi
I have been playing with a C userspace component to pass values from
Linuxcnc to an arduino for display on a pendant LCD.
The code works perfectly from a commandline program but when inserted
into a component, it compiles and runs but each
write(fd, buff, sizeof(buff)) goes to stdout / stderr
On 4 July 2012 15:00, Kasey Matejcek wrote:
> I want to be able to turn down the part then change the tool to drimal type
> cutter tool and cut a pattern into the peace with one gcode file
>
> Is this possible?
It is possible. It isn't especially easy. It is probably easier with
servos than with
2012/7/3 mark center :
> Vibration consideration and rigidity are usually more limiting factors
> in machining than HP.
Yes, of course. And that is why I would like to have servos being able
to get full power out of spindle, so that I can learn about the
vibrations on that machine. We have been to
I have a lathe setup using Jons Universal PWM controller and DC brush Amps
I want to set it up so the spindle can be used as an a axis
I was think of using the 4th servo port to control the spindle with one of
his amps.
the spindle has a 90v DC motor on it
the spindle has a 500 count increment
Hello all;
New touch probe (from cnc4pc) attached to an input on my Gecko G540. LinuxCNC
2.5.0, upgraded last weekend.
I got a routine from the www.linuxcnc.org web site (topic 18421, dated 4 months
ago) with "center_material.ngc"
Working through it, it does Z, X, but fails on the Y axis.
er
Your Welcome
Enjoy
John
On 7/4/2012 4:30 AM, Viesturs Lācis wrote:
> 2012/7/3 andy pugh :
>> On 2 July 2012 22:45, Florian Rist wrote:
>>
>>> I.E. I'd like to be able to place my work-piece anywhere on the table,
>>> in any orientation and then somehow measure positions and orientation
>>> and t
On Wednesday 04 July 2012 07:37:20 Viesturs Lācis did opine:
> 2012/7/3 andy pugh :
> > On 2 July 2012 22:45, Florian Rist wrote:
> >> I.E. I'd like to be able to place my work-piece anywhere on the
> >> table, in any orientation and then somehow measure positions and
> >> orientation and then be
2012/7/3 andy pugh :
> On 2 July 2012 22:45, Florian Rist wrote:
>
>> I.E. I'd like to be able to place my work-piece anywhere on the table,
>> in any orientation and then somehow measure positions and orientation
>> and then be able to compensate both it so that I can run a my prepared job.
>
> S
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