On Wednesday 27 November 2019 05:23:56 Darren Conway wrote:
> Hi
> One way to measure diameter errors to get the corrections is to fit a
> dial test indicator gauge so it measures a point 180 degrees from the
> cutting tool. Any errors in the turned diameter will be doubled.
>
> For example, if
Hi
One way to measure diameter errors to get the corrections is to fit a dial test
indicator gauge so it measures a point 180 degrees from the cutting tool. Any
errors in the turned diameter will be doubled.
For example, if the cutting tool path has an error of 0.01mm, then the diameter
error
On Tue, 26 Nov 2019 at 23:46, Gene Heskett wrote:
> On Tuesday 26 November 2019 13:59:39 andy pugh wrote:
>
> > On Tue, 26 Nov 2019 at 16:42, Gene Heskett
>
> I'd expect a better cylinder, but not perfect on a .0001" dial.
You can't use a dial. That depends on your (known flawed) lathe to
On Tuesday 26 November 2019 13:59:39 andy pugh wrote:
> On Tue, 26 Nov 2019 at 16:42, Gene Heskett
> wrote:
>
> My lathe can probably make a decent starter square as I've measured
> the
This was using a knife edge being moved in and out of the beam with x as
z was brought forward, detector
On Tue, 26 Nov 2019 at 16:42, Gene Heskett wrote:
My lathe can probably make a decent starter square as I've measured the
> bed wear with a laser sighter and corrected that.
I think that you have missed my point.
1) Machine something that ought to be a perfect cylinder.
2) Measure the actual
On Tuesday 26 November 2019 09:55:00 andy pugh wrote:
> On Tue, 26 Nov 2019 at 13:54, Kenneth Lerman wrote:
> > Use a cylinder square:
>
> There is no need to start with a perfect cylinder. Instead try to
> _make_ a perfect cylinder and correct the other way, by how imperfect
> it is.
Which is
On Tue, 26 Nov 2019 at 13:54, Kenneth Lerman wrote:
>
> Use a cylinder square:
There is no need to start with a perfect cylinder. Instead try to
_make_ a perfect cylinder and correct the other way, by how imperfect
it is.
--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
On Tuesday 26 November 2019 07:28:09 Kenneth Lerman wrote:
> Use a cylinder square:
>
> https://www.ebay.com/i/312037924818?chn=ps=1=1=711
>-117182-37290-0=2=312037924818=541454015492
>e=c=pla=1014782==6470552628=8
>1274342767=aud-762207186714:pla-541454015492=1139336
Use a cylinder square:
https://www.ebay.com/i/312037924818?chn=ps=1=1=711-117182-37290-0=2=312037924818=541454015492=c=pla=1014782==6470552628=81274342767=aud-762207186714:pla-541454015492=1139336=8120224=Cj0KCQiAt_PuBRDcARIsAMNlBdr9GnvyFwQqV15dYDNLYJa-MSmhDV7Y65Gp7GAnQkUOOGJ9CgQ9-2gaAn4hEALw_wcB
On Sunday 24 November 2019 20:54:11 Stuart Stevenson wrote:
> I have used bidirectional compensation on several machines. The latest
> on a cinci just like the blue one at MPM. It has a Cin950 control. I
> collected data using a CMM connected to the X table. I put the data in
> the file,
I have used bidirectional compensation on several machines. The latest on a
cinci just like the blue one at MPM. It has a Cin950 control. I collected
data using a CMM connected to the X table. I put the data in the file,
restarted the machine and the machine had twice the error as when I
started.
On Sunday 24 November 2019 19:47:33 Stuart Stevenson wrote:
> A two (or three) dimension comp file could work wonders to straighten
> the motion. To be able to correct Y and Z motion per X motion at the
> same discreet points chosen for the bidirectional compensation would
> be a very good thing.
There is an example on the forum of a simple component that corrects for a
non-square machine (adjusts Y based on X position). Might help get you
going.
https://forum.linuxcnc.org/10-advanced-configuration/34031-using-hal-to-correct-axis-errors?start=0
Andy also links to a kinematics module to do
A two (or three) dimension comp file could work wonders to straighten the
motion. To be able to correct Y and Z motion per X motion at the same
discreet points chosen for the bidirectional compensation would be a very
good thing. Correcting X and Z for Y motion and correcting X and Y for Z
motion
Greetings all;
I see in Documentation.pdf at about page 375 its mentioned that if a comp
file is used. then backlash is ignored. That seems a bit odd, until one
realizes that COMP in this case is being used to correct for possible
non-linearities in THAT screw. That detail could be clarified,
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