Re: [Emc-users] cnc axis "Touch Off"

2020-09-11 Thread andy pugh 
On Fri, 11 Sep 2020 at 16:28, dave engvall  wrote:

> I've always done this the hard way by going
> back to the CAM. My brain is pretty well fried but I think a bit of
> matrix algebra would do this for you.

There is no need for complex maths. You can mirror a part simply by
changing the sign of every X move. (and probably I offset, if using
centre format arcs)

There is a tool that can do this for you directly on the G-code:
https://www.editcnc.com/m/mIndex.html (maybe others too)

-- 
atp
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designed for the especial use of mechanical geniuses, daredevils and
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Re: [Emc-users] cnc axis "Touch Off"

2020-09-11 Thread R C 
yes, I use "Touch Off".  the other one is typically grayed out. I am 
pretty sure because there is no tool selected yet.



When I make parts, I typically use one tool per g-code, I try to keep it 
simple.



The CNC machines I have are pretty simple,  they are Sherline machines, 
in a Paxton/Patterson enclosure,  (I have replaced all the  steppers and 
stepper controllers, power supplies etc replaced with stuff commonly 
used. And there are no fancy things like tool changers or anything like 
that to begin with.



Ron



On 9/11/20 10:09 AM, N wrote:

There are two buttons "Touch Off" and "Tool Touch Off". You always use the same?


Jon,

I wrote a bunch of wizards for my mill and my lathe. I use one coordinate 
system for the origin of the main part and a different origin for each each 
wizard as it is called so that the wizard works with respect to the/an origin. 
It makes the math in the wizard much simpler, especially when you are doing 
something like rotating a rectangle.

Alan


From: Jon Elson 
Subject: Re: [Emc-users] cnc axis "Touch Off"
Date: September 10, 2020 at 9:04:23 PM CDT
To: "Enhanced Machine Controller (EMC)" 


On 09/10/2020 08:28 PM, R C wrote:

I figured out the "touch off", and that it 'works' the same as homing, 
functionally.


I wondered what all the different coordinate systems are for, their differnces.

(I know what a coordinat system is, mathematician here.)

This allows you to set up an offset from a main coordinate system, for instance 
if you have several identical features to be machined on a part, one hunk of 
G-code could machine each part and then set up the offset to machine the next 
instance.

It can also be used if you have several parts mounted in a fixture, one coord 
system for each part.

Jon


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Re: [Emc-users] cnc axis "Touch Off"

2020-09-11 Thread N 
There are two buttons "Touch Off" and "Tool Touch Off". You always use the same?

> Jon,
> 
> I wrote a bunch of wizards for my mill and my lathe. I use one coordinate 
> system for the origin of the main part and a different origin for each each 
> wizard as it is called so that the wizard works with respect to the/an 
> origin. It makes the math in the wizard much simpler, especially when you are 
> doing something like rotating a rectangle.
> 
> Alan
> 
> > From: Jon Elson 
> > Subject: Re: [Emc-users] cnc axis "Touch Off"
> > Date: September 10, 2020 at 9:04:23 PM CDT
> > To: "Enhanced Machine Controller (EMC)" 
> > 
> > 
> > On 09/10/2020 08:28 PM, R C wrote:
> >> I figured out the "touch off", and that it 'works' the same as homing, 
> >> functionally.
> >> 
> >> 
> >> I wondered what all the different coordinate systems are for, their 
> >> differnces.
> >> 
> >> (I know what a coordinat system is, mathematician here.)
> > This allows you to set up an offset from a main coordinate system, for 
> > instance if you have several identical features to be machined on a part, 
> > one hunk of G-code could machine each part and then set up the offset to 
> > machine the next instance.
> > 
> > It can also be used if you have several parts mounted in a fixture, one 
> > coord system for each part.
> > 
> > Jon
> 
> 
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Re: [Emc-users] cnc axis "Touch Off"

2020-09-11 Thread R C 
well, I am comfortable with matrix algebra, but it's probably easier, 
more practical, to just do that part in freecad or so, and use a 
separate g code file for that.


I was just wondering  what these different coordinate systems are, what 
they are used for.



On 9/11/20 9:26 AM, dave engvall wrote:
IIRC some controls have a switch to do this.  Also I think you can 
flip the sign of one axis and get a mirror image but the sense of the 
cut (climb/conventional) also flips so unless your machine is pretty 
tight dimensions may also shift. I've always done this the hard way by 
going back to the CAM. My brain is pretty well fried but I think a bit 
of matrix algebra would do this for you.


Dave

On 9/11/20 6:43 AM, R C wrote:

Hello Andy,

That is interesting, I should learn more about these coordinate 
systems.  From a math/geometry perspective  there nothing that could 
keep you from


translating, rotating (and even more weird transformations)  a 
geometry into a custom one. However in an implementation, of course, 
you'd have to have a spot somewhere between the definition of an 
object (g code if you will) and where the machine/tool actually 
moves.  In some, not CC related, simulations, that's actually done/used.



there probably is a list of what these  coordinatesystems actually do?

(Now I am wondering, if I make a part, is there a coordinate system, 
that would turn out the mirror image that part?)



Ron





On 9/11/20 1:54 AM, andy pugh wrote:

On Fri, 11 Sep 2020 at 05:22, R C  wrote:


It sounds like the coordinate systems in essence are the same,  they
just have a different origin, for all the other parts, it's just the
same thing, just translated and/or rotated for another part?

Yes, and there is also only rotation about the  axis supported.
(I did just find myself wondering if you could put a set of direction
cosines in UVW but then decided that there probably isn't much call
for that.)

http://linuxcnc.org/docs/2.8/html/gcode/coordinates.html




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Re: [Emc-users] cnc axis "Touch Off"

2020-09-11 Thread dave engvall 
IIRC some controls have a switch to do this.  Also I think you can flip 
the sign of one axis and get a mirror image but the sense of the cut 
(climb/conventional) also flips so unless your machine is pretty tight 
dimensions may also shift. I've always done this the hard way by going 
back to the CAM. My brain is pretty well fried but I think a bit of 
matrix algebra would do this for you.


Dave

On 9/11/20 6:43 AM, R C wrote:

Hello Andy,

That is interesting, I should learn more about these coordinate 
systems.  From a math/geometry perspective  there nothing that could 
keep you from


translating, rotating (and even more weird transformations)  a 
geometry into a custom one. However in an implementation, of course, 
you'd have to have a spot somewhere between the definition of an 
object (g code if you will) and where the machine/tool actually 
moves.  In some, not CC related, simulations, that's actually done/used.



there probably is a list of what these  coordinatesystems actually do?

(Now I am wondering, if I make a part, is there a coordinate system, 
that would turn out the mirror image that part?)



Ron





On 9/11/20 1:54 AM, andy pugh wrote:

On Fri, 11 Sep 2020 at 05:22, R C  wrote:


It sounds like the coordinate systems in essence are the same,  they
just have a different origin, for all the other parts,   it's just the
same thing, just translated and/or rotated for another part?

Yes, and there is also only rotation about the  axis supported.
(I did just find myself wondering if you could put a set of direction
cosines in UVW but then decided that there probably isn't much call
for that.)

http://linuxcnc.org/docs/2.8/html/gcode/coordinates.html




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Re: [Emc-users] cnc axis "Touch Off"

2020-09-11 Thread R C 

Hello Andy,

That is interesting, I should learn more about these coordinate 
systems.  From a math/geometry perspective  there nothing that could 
keep you from


translating, rotating (and even more weird transformations)  a geometry 
into a custom one. However in an implementation, of course, you'd have 
to have a spot somewhere between the definition of an object (g code if 
you will) and where the machine/tool actually moves.  In some, not CC 
related, simulations, that's actually done/used.



there probably is a list of what these  coordinatesystems actually do?

(Now I am wondering, if I make a part, is there a coordinate system, 
that would turn out the mirror image that part?)



Ron





On 9/11/20 1:54 AM, andy pugh wrote:

On Fri, 11 Sep 2020 at 05:22, R C  wrote:


It sounds like the coordinate systems in essence are the same,  they
just have a different origin, for all the other parts,   it's just the
same thing, just translated and/or rotated for another part?

Yes, and there is also only rotation about the  axis supported.
(I did just find myself wondering if you could put a set of direction
cosines in UVW but then decided that there probably isn't much call
for that.)

http://linuxcnc.org/docs/2.8/html/gcode/coordinates.html




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Re: [Emc-users] cnc axis "Touch Off"

2020-09-11 Thread Alan Condit 
Jon,

I wrote a bunch of wizards for my mill and my lathe. I use one coordinate 
system for the origin of the main part and a different origin for each each 
wizard as it is called so that the wizard works with respect to the/an origin. 
It makes the math in the wizard much simpler, especially when you are doing 
something like rotating a rectangle.

Alan

> From: Jon Elson 
> Subject: Re: [Emc-users] cnc axis "Touch Off"
> Date: September 10, 2020 at 9:04:23 PM CDT
> To: "Enhanced Machine Controller (EMC)" 
> 
> 
> On 09/10/2020 08:28 PM, R C wrote:
>> I figured out the "touch off", and that it 'works' the same as homing, 
>> functionally.
>> 
>> 
>> I wondered what all the different coordinate systems are for, their 
>> differnces.
>> 
>> (I know what a coordinat system is, mathematician here.)
> This allows you to set up an offset from a main coordinate system, for 
> instance if you have several identical features to be machined on a part, one 
> hunk of G-code could machine each part and then set up the offset to machine 
> the next instance.
> 
> It can also be used if you have several parts mounted in a fixture, one coord 
> system for each part.
> 
> Jon


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Re: [Emc-users] cnc axis "Touch Off"

2020-09-11 Thread andy pugh 
On Fri, 11 Sep 2020 at 05:22, R C  wrote:

> It sounds like the coordinate systems in essence are the same,  they
> just have a different origin, for all the other parts,   it's just the
> same thing, just translated and/or rotated for another part?

Yes, and there is also only rotation about the  axis supported.
(I did just find myself wondering if you could put a set of direction
cosines in UVW but then decided that there probably isn't much call
for that.)

http://linuxcnc.org/docs/2.8/html/gcode/coordinates.html

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1912


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Re: [Emc-users] cnc axis "Touch Off"

2020-09-10 Thread R C 


ah ok,

It sounds like the coordinate systems in essence are the same,  they 
just have a different origin, for all the other parts,   it's just the 
same thing, just translated and/or rotated for another part?



Ron



On 9/10/20 8:04 PM, Jon Elson wrote:

On 09/10/2020 08:28 PM, R C wrote:
I figured out the "touch off", and that it 'works' the same as 
homing, functionally.



I wondered what all the different coordinate systems are for, their 
differnces.


(I know what a coordinat system is, mathematician here.)
This allows you to set up an offset from a main coordinate system, for 
instance if you have several identical features to be machined on a 
part, one hunk of G-code could machine each part and then set up the 
offset to machine the next instance.


It can also be used if you have several parts mounted in a fixture, 
one coord system for each part.


Jon


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Re: [Emc-users] cnc axis "Touch Off"

2020-09-10 Thread Jon Elson 

On 09/10/2020 08:28 PM, R C wrote:
I figured out the "touch off", and that it 'works' the 
same as homing, functionally.



I wondered what all the different coordinate systems are 
for, their differnces.


(I know what a coordinat system is, mathematician here.)
This allows you to set up an offset from a main coordinate 
system, for instance if you have several identical features 
to be machined on a part, one hunk of G-code could machine 
each part and then set up the offset to machine the next 
instance.


It can also be used if you have several parts mounted in a 
fixture, one coord system for each part.


Jon


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Re: [Emc-users] cnc axis "Touch Off"

2020-09-10 Thread R C 
I figured out the "touch off", and that it 'works' the same as homing, 
functionally.



I wondered what all the different coordinate systems are for, their 
differnces.


(I know what a coordinat system is, mathematician here.)


Ron



On 9/10/20 6:53 PM, Jon Elson wrote:

On 09/10/2020 05:59 PM, R C wrote:

I was just playing with it a bit,


I have the idea, that , like homing is done per axis, "touching Off" 
is done per axis too?
Yes, you should be able to select the axis that is to have its offset 
changed and then enter what that coordinate should be set to.  (You 
can also select the workpiece coordinate system on that dialog box.)


Jon


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Re: [Emc-users] cnc axis "Touch Off"

2020-09-10 Thread Jon Elson 

On 09/10/2020 05:59 PM, R C wrote:

I was just playing with it a bit,


I have the idea, that , like homing is done per axis, 
"touching Off" is done per axis too?
Yes, you should be able to select the axis that is to have 
its offset changed and then enter what that coordinate 
should be set to.  (You can also select the workpiece 
coordinate system on that dialog box.)


Jon


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Re: [Emc-users] cnc axis "Touch Off"

2020-09-10 Thread R C 



On 9/10/20 5:49 PM, Gene Heskett wrote:

On Thursday 10 September 2020 18:50:03 jrmitchellj wrote:


On a Mill setup, touch-off only affects the Z axis.  You will need to
find your X0, and Y0 positions.  I use the end key to bring up the
dialog and set the offset.

--J. Ray Mitchell Jr.
jrmitche...@gmail.com


It works for all 4 configured axis's here.


I assume you still have to do each axis separate, that's what I have to 
do it seems.






"Good enough is the enemy of excellence"author unknown

On Thu, Sep 10, 2020 at 2:51 PM R C  wrote:

Hello,


this is probably a rookie question, but sometime when I do a "Touch
Off",  the Z-position indeed becomes 0,  but the X and Y are not.
Then in teh axis program, it will still go to the "first" spot where
it needs to start milling, and in the  drawing it fllows the correct
lines/pattern,  but since the tuch off wasn't in the origin (0, 0,
0) on the actual workpiece/part the machining is off (and
consequently goes out of the material, and starts milling air at
some point.


I am wondering why that happens?   Is that a mistake I sometimes
make in Freecad, or is that something I do wrong touching off? (I am
fairly sure it is not a bug).


How can I make sure that I am actually touching off at (0, 0, 0) ?


thanks,


Ron

(sorry if I have some terminology incorrect, but you know ... rookie
here.)



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Re: [Emc-users] cnc axis "Touch Off"

2020-09-10 Thread andy pugh 
On Thu, 10 Sep 2020 at 22:51, R C  wrote:

> this is probably a rookie question, but sometime when I do a "Touch
> Off",  the Z-position indeed becomes 0,  but the X and Y are not.   Then
> in teh axis program, it will still go to the "first" spot where it needs
> to start milling

There are two different touch-offs: Tool and Coordinate system.

On a Mill you typically only touch-off the tool in Z, but each tool
can have XYZABCUVW offsets.
Lathes will generally use Z and X offsets.

The coordinate system offset applies to all tools.

So, for a mill with a collet chuck you can choose to touch-off the
tool every time, or the coordinate system every time, or some
combination. But we warned that unless you are disciplined and know
what you want to achieve, using both can get confusing. With a machine
that has a "proper" toolholding system then you would touch-off each
tool into the tool table, then you can touch-off the coordinate system
with any tool and the coordinate system will be correct for all tools.

Axis only touches-off one axis at a time. You need to choose the axis
with the radio buttons before pressing the touch-off button.

Touchy allows you to touch off every coordinate system or tool axis at
the same time.

I don't know what the other UIs do without testing them as I have
little experience with them.

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1912


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Re: [Emc-users] cnc axis "Touch Off"

2020-09-10 Thread Gene Heskett 
On Thursday 10 September 2020 18:59:09 R C wrote:

> I was just playing with it a bit,
>
>
> I have the idea, that , like homing is done per axis, "touching Off"
> is done per axis too?
>
yes, and has forever here.
>
> thanks,
>
>
> Ron
>
> On 9/10/20 4:50 PM, jrmitchellj wrote:
> > On a Mill setup, touch-off only affects the Z axis.  You will need
> > to find your X0, and Y0 positions.  I use the end key to bring up
> > the dialog and set the offset.
> >
> > --J. Ray Mitchell Jr.
> > jrmitche...@gmail.com
> >
> >
> >
> > "Good enough is the enemy of excellence"author unknown
> >
> > On Thu, Sep 10, 2020 at 2:51 PM R C  wrote:
> >> Hello,
> >>
> >>
> >> this is probably a rookie question, but sometime when I do a "Touch
> >> Off",  the Z-position indeed becomes 0,  but the X and Y are not.  
> >> Then in teh axis program, it will still go to the "first" spot
> >> where it needs to start milling, and in the  drawing it fllows the
> >> correct lines/pattern,  but since the tuch off wasn't in the origin
> >> (0, 0, 0) on the actual workpiece/part the machining is off (and
> >> consequently goes out of the material, and starts milling air at
> >> some point.
> >>
> >>
> >> I am wondering why that happens?   Is that a mistake I sometimes
> >> make in Freecad, or is that something I do wrong touching off? (I
> >> am fairly sure it is not a bug).
> >>
> >>
> >> How can I make sure that I am actually touching off at (0, 0, 0) ?
> >>
> >>
> >> thanks,
> >>
> >>
> >> Ron
> >>
> >> (sorry if I have some terminology incorrect, but you know ...
> >> rookie here.)
> >>
> >>
> >>
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Cheers, Gene Heskett
-- 
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 soap, ballot, jury, and ammo. Please use in that order."
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Re: [Emc-users] cnc axis "Touch Off"

2020-09-10 Thread Gene Heskett 
On Thursday 10 September 2020 18:50:03 jrmitchellj wrote:

> On a Mill setup, touch-off only affects the Z axis.  You will need to
> find your X0, and Y0 positions.  I use the end key to bring up the
> dialog and set the offset.
>
> --J. Ray Mitchell Jr.
> jrmitche...@gmail.com
>
It works for all 4 configured axis's here.
>
>
> "Good enough is the enemy of excellence"author unknown
>
> On Thu, Sep 10, 2020 at 2:51 PM R C  wrote:
> > Hello,
> >
> >
> > this is probably a rookie question, but sometime when I do a "Touch
> > Off",  the Z-position indeed becomes 0,  but the X and Y are not.  
> > Then in teh axis program, it will still go to the "first" spot where
> > it needs to start milling, and in the  drawing it fllows the correct
> > lines/pattern,  but since the tuch off wasn't in the origin (0, 0,
> > 0) on the actual workpiece/part the machining is off (and
> > consequently goes out of the material, and starts milling air at
> > some point.
> >
> >
> > I am wondering why that happens?   Is that a mistake I sometimes
> > make in Freecad, or is that something I do wrong touching off? (I am
> > fairly sure it is not a bug).
> >
> >
> > How can I make sure that I am actually touching off at (0, 0, 0) ?
> >
> >
> > thanks,
> >
> >
> > Ron
> >
> > (sorry if I have some terminology incorrect, but you know ... rookie
> > here.)
> >
> >
> >
> > ___
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>
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Cheers, Gene Heskett
-- 
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 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
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Re: [Emc-users] cnc axis "Touch Off"

2020-09-10 Thread R C 
yup,  that's why I noticed too.  I thought "touch off" would be more 
like "this is (0, 0, 0)"  and just hit that button once...


I guess I got lucky a few times.



On 9/10/20 5:28 PM, Dave Matthews wrote:

That is how I do it.  There are three radio buttons, one for each axis.  It
defaults to the last axis moved which is usually z.

Dave

On Thu, Sep 10, 2020, 19:01 R C  wrote:


I was just playing with it a bit,


I have the idea, that , like homing is done per axis, "touching Off" is
done per axis too?



thanks,


Ron





On 9/10/20 4:50 PM, jrmitchellj wrote:

On a Mill setup, touch-off only affects the Z axis.  You will need to

find

your X0, and Y0 positions.  I use the end key to bring up the dialog and
set the offset.

--J. Ray Mitchell Jr.
jrmitche...@gmail.com



"Good enough is the enemy of excellence"author unknown


On Thu, Sep 10, 2020 at 2:51 PM R C  wrote:


Hello,


this is probably a rookie question, but sometime when I do a "Touch
Off",  the Z-position indeed becomes 0,  but the X and Y are not.   Then
in teh axis program, it will still go to the "first" spot where it needs
to start milling, and in the  drawing it fllows the correct
lines/pattern,  but since the tuch off wasn't in the origin (0, 0, 0) on
the actual workpiece/part the machining is off (and consequently goes
out of the material, and starts milling air at some point.


I am wondering why that happens?   Is that a mistake I sometimes make in
Freecad, or is that something I do wrong touching off? (I am fairly sure
it is not a bug).


How can I make sure that I am actually touching off at (0, 0, 0) ?


thanks,


Ron

(sorry if I have some terminology incorrect, but you know ... rookie

here.)



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Re: [Emc-users] cnc axis "Touch Off"

2020-09-10 Thread Dave Matthews 
That is how I do it.  There are three radio buttons, one for each axis.  It
defaults to the last axis moved which is usually z.

Dave

On Thu, Sep 10, 2020, 19:01 R C  wrote:

> I was just playing with it a bit,
>
>
> I have the idea, that , like homing is done per axis, "touching Off" is
> done per axis too?
>
>
>
> thanks,
>
>
> Ron
>
>
>
>
>
> On 9/10/20 4:50 PM, jrmitchellj wrote:
> > On a Mill setup, touch-off only affects the Z axis.  You will need to
> find
> > your X0, and Y0 positions.  I use the end key to bring up the dialog and
> > set the offset.
> >
> > --J. Ray Mitchell Jr.
> > jrmitche...@gmail.com
> >
> >
> >
> > "Good enough is the enemy of excellence"author unknown
> >
> >
> > On Thu, Sep 10, 2020 at 2:51 PM R C  wrote:
> >
> >> Hello,
> >>
> >>
> >> this is probably a rookie question, but sometime when I do a "Touch
> >> Off",  the Z-position indeed becomes 0,  but the X and Y are not.   Then
> >> in teh axis program, it will still go to the "first" spot where it needs
> >> to start milling, and in the  drawing it fllows the correct
> >> lines/pattern,  but since the tuch off wasn't in the origin (0, 0, 0) on
> >> the actual workpiece/part the machining is off (and consequently goes
> >> out of the material, and starts milling air at some point.
> >>
> >>
> >> I am wondering why that happens?   Is that a mistake I sometimes make in
> >> Freecad, or is that something I do wrong touching off? (I am fairly sure
> >> it is not a bug).
> >>
> >>
> >> How can I make sure that I am actually touching off at (0, 0, 0) ?
> >>
> >>
> >> thanks,
> >>
> >>
> >> Ron
> >>
> >> (sorry if I have some terminology incorrect, but you know ... rookie
> here.)
> >>
> >>
> >>
> >> ___
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> >> https://lists.sourceforge.net/lists/listinfo/emc-users
> >>
> > ___
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>
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Re: [Emc-users] cnc axis "Touch Off"

2020-09-10 Thread R C 

I was just playing with it a bit,


I have the idea, that , like homing is done per axis, "touching Off" is 
done per axis too?




thanks,


Ron





On 9/10/20 4:50 PM, jrmitchellj wrote:

On a Mill setup, touch-off only affects the Z axis.  You will need to find
your X0, and Y0 positions.  I use the end key to bring up the dialog and
set the offset.

--J. Ray Mitchell Jr.
jrmitche...@gmail.com



"Good enough is the enemy of excellence"author unknown


On Thu, Sep 10, 2020 at 2:51 PM R C  wrote:


Hello,


this is probably a rookie question, but sometime when I do a "Touch
Off",  the Z-position indeed becomes 0,  but the X and Y are not.   Then
in teh axis program, it will still go to the "first" spot where it needs
to start milling, and in the  drawing it fllows the correct
lines/pattern,  but since the tuch off wasn't in the origin (0, 0, 0) on
the actual workpiece/part the machining is off (and consequently goes
out of the material, and starts milling air at some point.


I am wondering why that happens?   Is that a mistake I sometimes make in
Freecad, or is that something I do wrong touching off? (I am fairly sure
it is not a bug).


How can I make sure that I am actually touching off at (0, 0, 0) ?


thanks,


Ron

(sorry if I have some terminology incorrect, but you know ... rookie here.)



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Re: [Emc-users] cnc axis "Touch Off"

2020-09-10 Thread jrmitchellj 
On a Mill setup, touch-off only affects the Z axis.  You will need to find
your X0, and Y0 positions.  I use the end key to bring up the dialog and
set the offset.

--J. Ray Mitchell Jr.
jrmitche...@gmail.com



"Good enough is the enemy of excellence"author unknown


On Thu, Sep 10, 2020 at 2:51 PM R C  wrote:

> Hello,
>
>
> this is probably a rookie question, but sometime when I do a "Touch
> Off",  the Z-position indeed becomes 0,  but the X and Y are not.   Then
> in teh axis program, it will still go to the "first" spot where it needs
> to start milling, and in the  drawing it fllows the correct
> lines/pattern,  but since the tuch off wasn't in the origin (0, 0, 0) on
> the actual workpiece/part the machining is off (and consequently goes
> out of the material, and starts milling air at some point.
>
>
> I am wondering why that happens?   Is that a mistake I sometimes make in
> Freecad, or is that something I do wrong touching off? (I am fairly sure
> it is not a bug).
>
>
> How can I make sure that I am actually touching off at (0, 0, 0) ?
>
>
> thanks,
>
>
> Ron
>
> (sorry if I have some terminology incorrect, but you know ... rookie here.)
>
>
>
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
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Re: [Emc-users] cnc axis "Touch Off"

2020-09-10 Thread R C 

Hello,


this is probably a rookie question, but sometime when I do a "Touch 
Off",  the Z-position indeed becomes 0,  but the X and Y are not.   Then 
in teh axis program, it will still go to the "first" spot where it needs 
to start milling, and in the  drawing it fllows the correct 
lines/pattern,  but since the tuch off wasn't in the origin (0, 0, 0) on 
the actual workpiece/part the machining is off (and consequently goes 
out of the material, and starts milling air at some point.



I am wondering why that happens?   Is that a mistake I sometimes make in 
Freecad, or is that something I do wrong touching off? (I am fairly sure 
it is not a bug).



How can I make sure that I am actually touching off at (0, 0, 0) ?


thanks,


Ron

(sorry if I have some terminology incorrect, but you know ... rookie here.)



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