Oh and just to add to the confusion, the doc seems to match motion.c found at
https://raw.githubusercontent.com/LinuxCNC/linuxcnc/master/src/emc/motion/motion.c
for example from motion.c:
if ((retval = hal_pin_float_newf(HAL_OUT, &(addr->spindle_speed_out_abs),
mot_comp_id,
On Wednesday 14 April 2021 23:15:56 andrew beck wrote:
> Hey guys
>
> looking for info on how to wire up a mesa ency encoder card to my vfd.
>
> I have a encoder card that outputs 12v to the encoder that I have
> (which is also a 12 v encoder) but would like to split the encoder
> pulses off to
On Wed, 14 Apr 2021, John Dammeyer wrote:
Date: Wed, 14 Apr 2021 20:55:01 -0700
From: John Dammeyer
Reply-To: "Enhanced Machine Controller (EMC)"
To: "'Enhanced Machine Controller (EMC)'"
Subject: [Emc-users] Motion information.
I've returned to playing with the BeagleBone Black and
On Thu, 15 Apr 2021, andrew beck wrote:
Date: Thu, 15 Apr 2021 15:15:56 +1200
From: andrew beck
Reply-To: "Enhanced Machine Controller (EMC)"
To: "Enhanced Machine Controller (EMC)"
Subject: [Emc-users] wiring up mesa ency encoder
Hey guys
looking for info on how to wire up a mesa ency
> From: Peter C. Wallace [mailto:p...@mesanet.com]
> On Wed, 14 Apr 2021, John Dammeyer wrote:
> > Is there something newer than this?
> > http://linuxcnc.org/docs/html/man/man9/motion.9.html#MOTION%20PARAMETERS
> >
> > The reason I ask is for both my LinuxCNC with MESA 7i92H and the MachineKit
>
Hey guys
looking for info on how to wire up a mesa ency encoder card to my vfd.
I have a encoder card that outputs 12v to the encoder that I have (which is
also a 12 v encoder) but would like to split the encoder pulses off to my
7i77 as well as back to schiender altivar 71 vfd.
the vfd does
Gentlemen,
My current attention to the project is driven by my desire to have 5 axis
cutter diameter compensation in LinuxCNC.
I am now 67 (soon to be 68) years old and have retired. I sold out of MPM
in 2013. I had a shop for 5 years. I closed the shop in November of 2019,
sold most
But I did find, when I went looking;
https://motorcityrepair.com/ball-screw-repair/
On Wed, 14 Apr 2021 at 18:17, Todd Zuercher wrote:
> Thanks, No I did not. But it appears they are in the UK, so not much help.
>
> Todd Zuercher
> P. Graham Dunn Inc.
> 630 Henry Street
> Dalton, Ohio 44618
I've returned to playing with the BeagleBone Black and Xylotex Cape to make it
match the MESA 7i92 pins on the DB-25. I've run into issues with naming of
pins in the HAL file.
Is there something newer than this?
http://linuxcnc.org/docs/html/man/man9/motion.9.html#MOTION%20PARAMETERS
The
thanks for the responses gentlemen
The information helps me to understand the flow of information through the
project.
It may turn out to have been dangerous information as I see a LOT of
things/items that need to be addressed.
I will talk about the items in future emails. :)
again - thanks for
Did you try PGM Reball (saw them on an old video I have)
On Tue, 13 Apr 2021 at 14:38, Todd Zuercher wrote:
> Yes, near the limit switch, outside of the normal travel area, I can not
> measure any backlash. That pretty much points the finger squarely at wear
> on the screw as the main
Primitive in this context would mean 'most basic', 'lowest level'.
Gerrit
-Original Message-
From: Stuart Stevenson
Sent: April 13, 2021 7:23 PM
To: Enhanced Machine Controller (EMC) ;
Emc2-developers
Subject: [Emc-users] primitive code question from a C/C++ newbie
Hi,
This is really a question about 'primitive level'
On Tue, Apr 13, 2021 at 6:22 PM Stuart Stevenson wrote:
> Hi,
> src/emc/rs274ngc/interp_convert.cc line 1897 has the term 'primitive code'
>
> What is the definition of primitive code in this context?
> Let me know if this is something I can
Ha ha, oops, they're in the UK
On Tue, 13 Apr 2021 at 17:22, Roland Jollivet
wrote:
>
> Did you try PGM Reball (saw them on an old video I have)
>
>
> On Tue, 13 Apr 2021 at 14:38, Todd Zuercher wrote:
>
>> Yes, near the limit switch, outside of the normal travel area, I can not
>> measure
Hi,
src/emc/rs274ngc/interp_convert.cc line 1897 has the term 'primitive code'
What is the definition of primitive code in this context?
Let me know if this is something I can search the internet to learn.
thanks
Stuart
--
Addressee is the intended audience.
If you are not the addressee then
I have no experience with this but I've read about people using oversized
balls to fix this. I think it is a stop-gap. But you can see how they
would ride above the center of the groove and be very solid. They are
talking *very tiny* amount of oversize.I seem to remember having to
sort the
On Wed, 14 Apr 2021 at 14:44, Stuart Stevenson wrote:
>
> This is really a question about 'primitive level'
I think that, in this context, it is referring to realtime code (written in C).
The suggestion being that cutter compensation could be done in the
trajectory planner rather than in the
Spring loaded zero backlash nuts on lead screws work ok for a while for light
loads, but they do still wear out rather quickly and cause problems when they
do. Some of the cheaper poorer designed ones will back off the spring when
moving under load in one direction causing slop and lost
On Wed, 14 Apr 2021 at 17:17, Chris Albertson wrote:
> That would fix the issue too. They use two nuts with a spring between
> them.
Not always a spring. You can create a preloaded pair by simply
screwing them into each other and locking the angular arrangement.
Though the style that use
Todd,
I used Barnes for high quality and PSI for quick service.
Scott H
On Monday, April 12, 2021, 1:24:35 PM CDT, Todd Zuercher
wrote:
Those here who have had to deal with a worn out ball screw. How is this
normally manifested. I have a machine that is only showing backlash
One more idea. Move the nut one foot to the left so that it rides on the
unworn part of the screw. Then use a one-foot-long spacer to connect the
nut to the machine. You do lose one foot of travel.
About Andy's idea of not using a spring between the two nuts: That works
if the screw is
Thanks, No I did not. But it appears they are in the UK, so not much help.
Todd Zuercher
P. Graham Dunn Inc.
630 Henry Street
Dalton, Ohio 44618
Phone: (330)828-2105ext. 2031
-Original Message-
From: Roland Jollivet
Sent: Tuesday, April 13, 2021 11:23 AM
To: Enhanced Machine
On Wed, Apr 14, 2021 at 8:54 AM Thomas J Powderly wrote:
> A few of the larger EDMs we built had 5meter leadscrews with dbl nuts,
>
That would fix the issue too. They use two nuts with a spring between
them. It is really the same concept as oversized balls. In both cases,
the balls ride on
On Wednesday 14 April 2021 12:15:11 Chris Albertson wrote:
> On Wed, Apr 14, 2021 at 8:54 AM Thomas J Powderly
wrote:
> > A few of the larger EDMs we built had 5meter leadscrews with dbl
> > nuts,
>
> That would fix the issue too. They use two nuts with a spring
> between them. It is really
On 4/12/21 9:48 AM, Todd Zuercher wrote:
Those here who have had to deal with a worn out ball screw. How is this normally manifested. I have a machine that is only showing backlash under load.
You might put an indicator between the ball and the table - check for mounting slop? If the
There are companies that regrind and reball ballscrews. One I looked into
claimed they could grind rolled ballscrews to be as precise as ground screws.
Some ballscrews have every other ball undersized to further reduce friction,
but it also reduces load capacity. Replacing the spacer balls
On Wed, Apr 14, 2021 at 12:38 PM andy pugh wrote:
> On Wed, 14 Apr 2021 at 17:17, Chris Albertson
> wrote:
>
> > That would fix the issue too. They use two nuts with a spring between
> > them.
>
> Not always a spring. You can create a preloaded pair by simply
> screwing them into each other
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