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Re: G41 (was: First drawing software)

Jeremy Taylor
 

Somehow I see this in my mind, and the cutter would have to be to the right
of the line when it is top left, but when it moves to top right, the cutter
would need to actually be on the left of the line. Look at the machine from
where I SIT.
Now If I imagined that I was riding on the cutter, and if every time the
cutter changed directions, I was swung around so that I was always facing
the direction the cutter was traveling, then ... THEN I could see it as
always being to the right.... ok ok I think I'm starting to grasp this.

JT

JT.
No this is wrong.
Re read Mike reply #7682
Don't think of the cutter being above or below the line, this will
confuse you.
Think in terms of what side of the line is the cutter when the tool
is moving forward.
If you are cutting an internal square and you start top left corner
and move to top right the cutter will always be to the right of the
line no matter what side it is cutting.

John S.




Yahoo! Groups Links
Re: G41 (was: First drawing software)

stevenson_engineers
 

--- In mach1mach2cnc@..., "Jeremy Taylor" <jt@j... wrote:

Consider the cutout a square, as you follow the line on the inside,
the
compensation would have to change, from being off to the left,
under, off to
the right, and above ~ the line. If the tool path was like I'd do
it by
hand (in once, out once), but instead the tool comes up and re
enters a
couple of times
Trying to keep track of which section of a single cutout need G41,
or G42
is driving me crazy.
JT.
No this is wrong.
Re read Mike reply #7682
Don't think of the cutter being above or below the line, this will
confuse you.
Think in terms of what side of the line is the cutter when the tool
is moving forward.
If you are cutting an internal square and you start top left corner
and move to top right the cutter will always be to the right of the
line no matter what side it is cutting.

John S.
Is charge pump needed???

Thomas Powell
 

If I have seperate power switches and power up the computer first then after the boot bring power to the rest of the system, Campbell breakout board, Gecko's, encoders etc. Will a charge pump still be needed?

Thanks for any help,

Thomas Powell
Re: G41 (was: First drawing software)

 

--- In mach1mach2cnc@..., "Jeremy Taylor" <jt@j...> wrote:
I have no control over CW, OR CCW rotation, all I can set is speed,
and at
30000rpm my experience has shown that cuts just as well in either
direction,
If I was using the tool by hand, it would feed easier in one
direction, but
now that it's cnc'c - it's just as smooth in either direction.

Consider the cutout a square, as you follow the line on the inside,
the
compensation would have to change, from being off to the left,
under, off to
the right, and above ~ the line. If the tool path was like I'd do
it by
hand (in once, out once), but instead the tool comes up and re
enters a
couple of times
Trying to keep track of which section of a single cutout need G41,
or G42
is driving me crazy.

As soon as I recover from purchasing a plating system, I will
invest in
decent cad/cam package, although All I need is "simple!" 2d cutouts.

For giggles here is an example of what Mach2 came up with from my
dxf
import, attached is gif of what it supposed to look like. It's for
a snap
in AC outlet. (everything inside the lines need to go, but nothing
on, or
outside the line should be cut.
(in MM)
F20.000000
G0 X0.000000 Y0.000000 Z0.200000
M3
S20.000000
G0 X0.000000 Y0.000000 Z0.200000
G0 X0.050800 Y18.262600 Z0.200000
G1 X0.050800 Y18.262600 Z-0.100000
G1 X8.483600 Y18.262600 Z-0.100000
G1 X8.483600 Y24.257000 Z-0.100000
G0 X8.483600 Y24.257000 Z0.200000
G0 X17.780000 Y24.257000 Z0.200000
G1 X17.780000 Y24.257000 Z-0.100000
G1 X17.780000 Y18.262600 Z-0.100000
G1 X26.187400 Y18.262600 Z-0.100000
G1 X26.187400 Y7.950200 Z-0.100000
G1 X22.199600 Y7.950200 Z-0.100000
G1 X22.199600 Y0.000000 Z-0.100000
G1 X3.987800 Y0.000000 Z-0.100000
G1 X3.987800 Y7.950200 Z-0.100000
G1 X0.000000 Y7.924800 Z-0.100000
G1 X0.050800 Y18.237200 Z-0.100000
G0 X0.050800 Y18.237200 Z0.200000
G0 X8.483600 Y24.257000 Z0.200000
G1 X8.483600 Y24.257000 Z-0.100000
G1 X17.780000 Y24.257000 Z-0.100000
G0 X17.780000 Y24.257000 Z0.200000
M5
G0 X0.000000 Y0.200000 Z0.000000

I'm assuming I'd need a g41 or g42 before each point where the Z re-
enters
the work. I believe this import DXF was already hand drawn smaller
by 1.5MM

JT
There comes a time in most CNC'rs lives when they realize that CAM is
a good thing. Just like a calculator makes math easier than with a
pencil, when the important thing becomes the part and not the action
of laying it out, CAM takes all of the durgery out and does all of
the calculations for you. In a good CAM program you should see the
orginal part on the screen. You should be able to click on a path
and and choices for a tool, depth and speed are one click away. The
choice of tool should automatically put the toolpath where it should
be after you select an on-line, inside or outside cut. More advanced
programs also let you decide which direction you cut. It's last job
is to spit out a valid g-code file that will run without a problem on
your software controller.

For those that complain that they want to change the toolpath in g-
code at the machine, they guess they feel the need for control. It
takes less than a minute for me to go back in my CAM program (one
reason I like running a Windows controller like MACH2) and change the
tool definition and recalculate the toolpaths. I guess I have gotten
lazy over the years and I require a less hands-on approach to cutting
things. I remember when we had to hand code everything from a
blueprint into g-code and punch it in a papertape. Any changes took
hours. I LOVE the fact I can draw something, click a few buttons and
have the machine running the part in a few minutes. I don't miss the
hand coding one bit.

TC
Re: G41 (was: First drawing software)

notoneleft
 

Some of the smarter CAM programs automatically generate a toolpath
that
is offset
by the tool radius and some make you do the offset manually. Artcam
does it
automatically

With G41/G42, you don't need to do this at all. Just throw in the G41
or G42, and Mach2 will do the offsets for you. If your cutting a
square, for example, and your tool is moving around the square CCW,
then you'd use G42 to offset your bit to the right side of the path.
Once you start using G41 and G42, you'll never go back. It makes
things much easier.

Gerry
Re: Version 5.0

 

Fantastic, Art, enjoy your trip you deserve it.
Jim

----- Original Message -----
From: "Art" <fenerty@...>
To: <mach1mach2cnc@...>
Sent: Saturday, March 06, 2004 8:04 PM
Subject: Re: [mach1mach2cnc] Re: Version 5.0


WHoooo HOooooo, my final act before shutting down and flying away, I found
the memory bug, mach2 now uses 40% less ram than before and the config
menus
are instant. Things are much faster without that particular bug....
YEeeeeHaaaaaa, Gone to burn away a couple quarts of Jose Quervo's
finest....

Sayonara all, Ariba Honadlay...Jeezus, I gotta get to bed, gotta fly in
5
hours....

Later...
Art
www.artofcnc.ca

----- Original Message -----
From: "Steve Blackmore" <steve@...>
To: <mach1mach2cnc@...>
Sent: Saturday, March 06, 2004 7:23 PM
Subject: Re: [mach1mach2cnc] Re: Version 5.0


On Sat, 06 Mar 2004 23:20:05 -0000, you wrote:

Setup worksheets.
CAM function!

(sorry, couldn't resist)
Neither could I..
--
Steve Blackmore





Yahoo! Groups Links







Yahoo! Groups Links
Re: G41 (was: First drawing software)

Michael Milligan
 

Ross

Cutter comp actually has two main functions :-

1) Just as you say to compensate for tool wear on
re-ground or undersize tools.

2) In industry quite often the person producing the
Part program does not know what cutting tools
are on hand at the machine tool. Maybe I do
not have a 10mm tool but I do have an 8mm
tool. If the part program employs G41/G42
I can cut it but if not I have to request a new
program. The logistics become more involved
if the part program is being sent to a sub-contractor
offsite.

Regards
michael

-----Original Message-----
From: rrc62_03782 [mailto:rrc62@...]
Sent: 07 March 2004 02:47
To: mach1mach2cnc@...
Subject: [mach1mach2cnc] Re: G41 (was: First drawing software)

--- In mach1mach2cnc@..., "Jeremy Taylor" <jt@j...> wrote:
OK - so how do I determine which side of my drawn lines gets the
compensation?
If I understand tool diameter compensation correctly, it is not designed
to
compensate for the tool radius but more designed to compensate for
slight variations
in tool diameter due to sharpening.

To profile a part, offset your cut line vector by the tool radius either
to the left or
right, depending on if you want to cut on the inside or outside. Save
the offset
vectors to a dxf and send that to Mach2.

Some of the smarter CAM programs automatically generate a toolpath that
is offset
by the tool radius and some make you do the offset manually. Artcam
does it
automatically. On more complex parts I prefer to do it manually. I
have more control
over the final outcome that way.

Ross





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Re: G41 (was: First drawing software)

Jeremy Taylor
 

This is what I have been doing, and particularly on complex stuff, I'd
rather have it done automatically.

-- So now I have conflicting information <,g>

----- Original Message -----
From: "rrc62_03782" <rrc62@...>
To: <mach1mach2cnc@...>
Sent: Saturday, March 06, 2004 9:46 PM
Subject: [mach1mach2cnc] Re: G41 (was: First drawing software)


--- In mach1mach2cnc@..., "Jeremy Taylor" <jt@j...> wrote:
OK - so how do I determine which side of my drawn lines gets the
compensation?
If I understand tool diameter compensation correctly, it is not designed
to
compensate for the tool radius but more designed to compensate for slight
variations
in tool diameter due to sharpening.

To profile a part, offset your cut line vector by the tool radius either
to the left or
right, depending on if you want to cut on the inside or outside. Save the
offset
vectors to a dxf and send that to Mach2.

Some of the smarter CAM programs automatically generate a toolpath that is
offset
by the tool radius and some make you do the offset manually. Artcam does
it
automatically. On more complex parts I prefer to do it manually. I have
more control
over the final outcome that way.

Ross





Yahoo! Groups Links
Re: G41 (was: First drawing software)

Jeremy Taylor
 

I have no control over CW, OR CCW rotation, all I can set is speed, and at
30000rpm my experience has shown that cuts just as well in either direction,
If I was using the tool by hand, it would feed easier in one direction, but
now that it's cnc'c - it's just as smooth in either direction.

Consider the cutout a square, as you follow the line on the inside, the
compensation would have to change, from being off to the left, under, off to
the right, and above ~ the line. If the tool path was like I'd do it by
hand (in once, out once), but instead the tool comes up and re enters a
couple of times
Trying to keep track of which section of a single cutout need G41, or G42
is driving me crazy.

As soon as I recover from purchasing a plating system, I will invest in
decent cad/cam package, although All I need is "simple!" 2d cutouts.

For giggles here is an example of what Mach2 came up with from my dxf
import, attached is gif of what it supposed to look like. It's for a snap
in AC outlet. (everything inside the lines need to go, but nothing on, or
outside the line should be cut.
(in MM)
F20.000000
G0 X0.000000 Y0.000000 Z0.200000
M3
S20.000000
G0 X0.000000 Y0.000000 Z0.200000
G0 X0.050800 Y18.262600 Z0.200000
G1 X0.050800 Y18.262600 Z-0.100000
G1 X8.483600 Y18.262600 Z-0.100000
G1 X8.483600 Y24.257000 Z-0.100000
G0 X8.483600 Y24.257000 Z0.200000
G0 X17.780000 Y24.257000 Z0.200000
G1 X17.780000 Y24.257000 Z-0.100000
G1 X17.780000 Y18.262600 Z-0.100000
G1 X26.187400 Y18.262600 Z-0.100000
G1 X26.187400 Y7.950200 Z-0.100000
G1 X22.199600 Y7.950200 Z-0.100000
G1 X22.199600 Y0.000000 Z-0.100000
G1 X3.987800 Y0.000000 Z-0.100000
G1 X3.987800 Y7.950200 Z-0.100000
G1 X0.000000 Y7.924800 Z-0.100000
G1 X0.050800 Y18.237200 Z-0.100000
G0 X0.050800 Y18.237200 Z0.200000
G0 X8.483600 Y24.257000 Z0.200000
G1 X8.483600 Y24.257000 Z-0.100000
G1 X17.780000 Y24.257000 Z-0.100000
G0 X17.780000 Y24.257000 Z0.200000
M5
G0 X0.000000 Y0.200000 Z0.000000

I'm assuming I'd need a g41 or g42 before each point where the Z re-enters
the work. I believe this import DXF was already hand drawn smaller by 1.5MM

JT

----- Original Message -----
From: "Michael Milligan" <zen11777@...>
To: <mach1mach2cnc@...>
Sent: Saturday, March 06, 2004 9:41 PM
Subject: RE: [mach1mach2cnc] G41 (was: First drawing software)


JT

O the assumption that the Tool Spindle is
Rotating in a clockwise direction and that you are
Cutting normally (as opposed to Climb Milling) the
Tool is placed to the LEFT of the material being
cut where LEFT/RIGHT is relative to the direction
of the tool.

Imagine you are sitting on the tool facing
the direction of travel, the material (geometry line/arc)
should be on your Right Shoulder.

This affect is achieved by using G41 (Left
Compensation), to place the tool on the other side
Of the Geometry use G42 (Right Compensation).

Again, Imagine the tool going round the
outside of a circle in a clockwise direction.
With the Spindle rotating Clockwise the forward
motion of the axes is working with the cutting
forces of the tool as it rotates into the material.
If the tool were on the inside of the circle
and going in a clockwise direction the cutting
forces of the tool would be working against the
forward motion.








This is the type of thing that CAM
Systems take care of for you.

Regards

Michael


-----Original Message-----
From: Jeremy Taylor [mailto:jt@...]
Sent: 07 March 2004 01:19
To: mach1mach2cnc@...
Subject: Re: [mach1mach2cnc] G41 (was: First drawing software)

OK - so how do I determine which side of my drawn lines gets the
compensation?
If I'm doing a cut out, I need the compensation to fall on the inside of
the
cut, IF I'm forming a piece, I'd need the compensation on the outside,
however I cant seem to figure out how to tell Mach2 which I want to do,
doing as you described in the previous reply.
Art suggested a while ago, that it MUST be done in the CAD program. and
hence my hand redrawn designs whit the lines falling on center of the
cut.
And my lines are set back 1.5mm so that the end result is what I
needed.

JT


----- Original Message -----
From: "Robin Szemeti" <list@...>
To: <mach1mach2cnc@...>
Sent: Saturday, March 06, 2004 5:40 AM
Subject: Re: [mach1mach2cnc] (First drawing software (was cnc plasma)


On Saturday 06 March 2004 10:13, Jeremy Taylor wrote:
Which versions of your software, have the capacity to figuring
tooling
offset, or... bit diameter?
I already have Mach2, but I've been using Vector Engineering's .free
quick
tools, and I have to "hand" offset my drawings by 3mm (diameter of
bit)
to
keep them true.
no you don;t :)

you can just put a 3.0mm dia tool in the tool table, select that tool
and
then put G41 or whatever in your GCODE file and it will offset and
apply
cutter radius compensation on the fly.

I'm looking for something that can automatically do this
for as little $$ as possible.
For automtaically doing it, Dolphin CAM is probably the most cost
effective
option. For 3 axis stuff it simple to use compared to some of the more
bells&whistles packages likr VisualMill, but .. its all there. Hunt
around
for the Mach2 special offer on Dolphin which brings it down to a very
good
price.


Jeremy Taylor

----- Original Message -----
From: "Michael Milligan" <zen11777@...>
To: <mach1mach2cnc@...>
Sent: Saturday, March 06, 2004 2:30 AM
Subject: RE: [mach1mach2cnc] (First drawing software (was cnc
plasma)

Scout

You can download Dolphin CAD for
Free, at the moment this is available from our
Website, www.dolphin.gb.com <> .

This will provide you with a 1st rate drawing
module which supports DXF export.

Regards

Michael
Dolphin Cad Cam Systems Ltd

-----Original Message-----
From: Hugh Smith [mailto:smithh@...]
Sent: 06 March 2004 01:48
To: mach1mach2cnc@...
Subject: Re: [mach1mach2cnc] (First drawing software (was cnc
plasma)

Scout,

I just purchased QuickCad 8 from
for USD48.00 + the
normal
S&H&T. I use AutoCAD a lot and for 2D work QuickCad is easier.
QuickCad does not do 3D and exports a dxf if wanted. Its been
able to
do everything I've asked of it, and for $48.00 whats to lose.

Hugh
----- Original Message -----
From: dk32544
To: mach1mach2cnc@...
Sent: Friday, March 05, 2004 2:24 PM
Subject: [mach1mach2cnc] (First drawing software (was cnc
plasma)


Well, thanks for all the great info. Looks like what I need to
do
is
just
get some drawing software and start practicing. Which leads me
to my
next question.

For the near term future I'll be doing simple shapes - brackets
and
such. I guess most 2D shapes are simple, but I won't be doing
much
metal art until probably next year. So what software should I
buy
to
start out with: Corel Draw, Quickdraw, or something else? I
have
heard of some problems with Corel Draw for this type of work,
but
don't
remember what the issue was. P.S. I already have the ruler but
I'm
not

sure if it's Windows XP compatible. lol.

Scout


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--
RapidCut CNC Technology

CNC Plasma Cutter




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300x250;code=18634;dcopt=rcl;ord=1078622683746325?>

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* To visit your group on the web, go to:


* To unsubscribe from this group, send an email to:
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Re: G41 (was: First drawing software)

 

--- In mach1mach2cnc@..., "Jeremy Taylor" <jt@j...> wrote:
OK - so how do I determine which side of my drawn lines gets the
compensation?
If I understand tool diameter compensation correctly, it is not designed to
compensate for the tool radius but more designed to compensate for slight variations
in tool diameter due to sharpening.

To profile a part, offset your cut line vector by the tool radius either to the left or
right, depending on if you want to cut on the inside or outside. Save the offset
vectors to a dxf and send that to Mach2.

Some of the smarter CAM programs automatically generate a toolpath that is offset
by the tool radius and some make you do the offset manually. Artcam does it
automatically. On more complex parts I prefer to do it manually. I have more control
over the final outcome that way.

Ross
Re: G41 (was: First drawing software)

Michael Milligan
 

JT

O the assumption that the Tool Spindle is
Rotating in a clockwise direction and that you are
Cutting normally (as opposed to Climb Milling) the
Tool is placed to the LEFT of the material being
cut where LEFT/RIGHT is relative to the direction
of the tool.

Imagine you are sitting on the tool facing
the direction of travel, the material (geometry line/arc)
should be on your Right Shoulder.

This affect is achieved by using G41 (Left
Compensation), to place the tool on the other side
Of the Geometry use G42 (Right Compensation).

Again, Imagine the tool going round the
outside of a circle in a clockwise direction.
With the Spindle rotating Clockwise the forward
motion of the axes is working with the cutting
forces of the tool as it rotates into the material.
If the tool were on the inside of the circle
and going in a clockwise direction the cutting
forces of the tool would be working against the
forward motion.








This is the type of thing that CAM
Systems take care of for you.

Regards

Michael

-----Original Message-----
From: Jeremy Taylor [mailto:jt@...]
Sent: 07 March 2004 01:19
To: mach1mach2cnc@...
Subject: Re: [mach1mach2cnc] G41 (was: First drawing software)

OK - so how do I determine which side of my drawn lines gets the
compensation?
If I'm doing a cut out, I need the compensation to fall on the inside of
the
cut, IF I'm forming a piece, I'd need the compensation on the outside,
however I cant seem to figure out how to tell Mach2 which I want to do,
doing as you described in the previous reply.
Art suggested a while ago, that it MUST be done in the CAD program. and
hence my hand redrawn designs whit the lines falling on center of the
cut.
And my lines are set back 1.5mm so that the end result is what I
needed.

JT


----- Original Message -----
From: "Robin Szemeti" <list@...>
To: <mach1mach2cnc@...>
Sent: Saturday, March 06, 2004 5:40 AM
Subject: Re: [mach1mach2cnc] (First drawing software (was cnc plasma)


On Saturday 06 March 2004 10:13, Jeremy Taylor wrote:
Which versions of your software, have the capacity to figuring
tooling
offset, or... bit diameter?
I already have Mach2, but I've been using Vector Engineering's .free
quick
tools, and I have to "hand" offset my drawings by 3mm (diameter of
bit)
to
keep them true.
no you don;t :)

you can just put a 3.0mm dia tool in the tool table, select that tool
and
then put G41 or whatever in your GCODE file and it will offset and
apply
cutter radius compensation on the fly.

I'm looking for something that can automatically do this
for as little $$ as possible.
For automtaically doing it, Dolphin CAM is probably the most cost
effective
option. For 3 axis stuff it simple to use compared to some of the more
bells&whistles packages likr VisualMill, but .. its all there. Hunt
around
for the Mach2 special offer on Dolphin which brings it down to a very
good
price.


Jeremy Taylor

----- Original Message -----
From: "Michael Milligan" <zen11777@...>
To: <mach1mach2cnc@...>
Sent: Saturday, March 06, 2004 2:30 AM
Subject: RE: [mach1mach2cnc] (First drawing software (was cnc
plasma)

Scout

You can download Dolphin CAD for
Free, at the moment this is available from our
Website, www.dolphin.gb.com <> .

This will provide you with a 1st rate drawing
module which supports DXF export.

Regards

Michael
Dolphin Cad Cam Systems Ltd

-----Original Message-----
From: Hugh Smith [mailto:smithh@...]
Sent: 06 March 2004 01:48
To: mach1mach2cnc@...
Subject: Re: [mach1mach2cnc] (First drawing software (was cnc
plasma)

Scout,

I just purchased QuickCad 8 from
for USD48.00 + the
normal
S&H&T. I use AutoCAD a lot and for 2D work QuickCad is easier.
QuickCad does not do 3D and exports a dxf if wanted. Its been
able to
do everything I've asked of it, and for $48.00 whats to lose.

Hugh
----- Original Message -----
From: dk32544
To: mach1mach2cnc@...
Sent: Friday, March 05, 2004 2:24 PM
Subject: [mach1mach2cnc] (First drawing software (was cnc
plasma)


Well, thanks for all the great info. Looks like what I need to
do
is
just
get some drawing software and start practicing. Which leads me
to my
next question.

For the near term future I'll be doing simple shapes - brackets
and
such. I guess most 2D shapes are simple, but I won't be doing
much
metal art until probably next year. So what software should I
buy
to
start out with: Corel Draw, Quickdraw, or something else? I
have
heard of some problems with Corel Draw for this type of work,
but
don't
remember what the issue was. P.S. I already have the ruler but
I'm
not

sure if it's Windows XP compatible. lol.

Scout


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Re: Spindle sensors

arturodu
 

My lathe has a nice encoder (not sure how many pulses per rev). I
weird it and I can the pulse train as the spindle turns. Is there a
way to connect this encoder for threading? I have not been able to
find a place in the program to configure the Timing pulse, or
anything to indicate the number of pulses per rev.

Thanks,

Arturo Duncan

--- In mach1mach2cnc@..., Art <fenerty@a...> wrote:
Hi John:

I probably shouldn't mention this as it could muddy the water,
but if you
drop a DRO #66 onto a screen, it can be used for the entrance
angle of a
thread. Its value is from 0 - 360 degrees, so just by changing
that value
and using the same code, you can get multi-turn threads... (Just
an
option..)

Art
www.artofcnc.ca

----- Original Message -----
Re: Version 5.0

Ed Gilbert
 

Hey Art,

Great news, have a good vacation. Just be careful not to look like the worm
in the bottle before you come home! :)

Best,

Ed Gilbert

Gilbert Engineered Systems
632 Warrenton-Embro Road
Macon, NC 27551
252-257-0539

-----Original Message-----
From: Art [mailto:fenerty@...]
Sent: Saturday, March 06, 2004 9:04 PM
To: mach1mach2cnc@...
Subject: Re: [mach1mach2cnc] Re: Version 5.0

WHoooo HOooooo, my final act before shutting down and flying away, I found
the memory bug, mach2 now uses 40% less ram than before and the config
menus
are instant. Things are much faster without that particular bug....
YEeeeeHaaaaaa, Gone to burn away a couple quarts of Jose Quervo's
finest....

Sayonara all, Ariba Honadlay...Jeezus, I gotta get to bed, gotta fly in
5
hours....

Later...
Art
www.artofcnc.ca

----- Original Message -----
From: "Steve Blackmore" <steve@...>
To: <mach1mach2cnc@...>
Sent: Saturday, March 06, 2004 7:23 PM
Subject: Re: [mach1mach2cnc] Re: Version 5.0


On Sat, 06 Mar 2004 23:20:05 -0000, you wrote:

Setup worksheets.
CAM function!

(sorry, couldn't resist)
Neither could I..
--
Steve Blackmore





Yahoo! Groups Links







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-------------------------------------
This message has been scanned for viruses and
dangerous content by NCOL.NET, and is believed to be clean.
Re: Version 5.0

Art
 

WHoooo HOooooo, my final act before shutting down and flying away, I found
the memory bug, mach2 now uses 40% less ram than before and the config menus
are instant. Things are much faster without that particular bug....
YEeeeeHaaaaaa, Gone to burn away a couple quarts of Jose Quervo's
finest....

Sayonara all, Ariba Honadlay...Jeezus, I gotta get to bed, gotta fly in 5
hours....

Later...
Art
www.artofcnc.ca

----- Original Message -----
From: "Steve Blackmore" <steve@...>
To: <mach1mach2cnc@...>
Sent: Saturday, March 06, 2004 7:23 PM
Subject: Re: [mach1mach2cnc] Re: Version 5.0


On Sat, 06 Mar 2004 23:20:05 -0000, you wrote:

Setup worksheets.
CAM function!

(sorry, couldn't resist)
Neither could I..
--
Steve Blackmore





Yahoo! Groups Links
Re: How close can the wires be ? - Advice needed.

Robin Szemeti
 

On Saturday 06 March 2004 23:02, ja_erickson wrote:
Thanks for the repiles,



I dont have any problems yet, because the system is just being wired.
I currently have wired the step and dir. lines and their drains are
terminated inside of a metal box that is shared with a breakout
board.
OK

Only one end of the drain is connected and thats the end nearest the
breakout board. I believe this is correct , please let me know
if i'm wrong.
thats right ... the real trick is to make sure that the supply to the
encoders or the supply to the opto couplers on the geckos comes down the same
cable, inside the same shield.

For example, if you have geckos, you should run +5V down the cable and then
step and direction back to the parallel port. You need to do this for each
gecko, do not use the same 5V line for both drives. Also .. use twisted pair
wiring (say 3 pairs) 1 wire of the 1st pair for step, the other for ground,
in the other pair, 1 wire for direction, the other wire for ground. etc, by
grounding 1 wire of each pair you reduce the crosstalk by LOTS.

the encoder wires also have a drain that i was planning on running
inside of the breakout board metal box along with the step and
dir. wires, would this be the correct way to wire those?
sounds fine to me,

when Ed refered to capacitive coupling, would that occur
between AC and DC wiring or DC and DC wiring?
Capacitive coupling occurs between any wiring. the capacitance couples the
AC signal in one wire into another. So .. there is always capacative
coupling, but its only a problem in the presence of an AC electric field.
With shielded cables there is no external electric field to the cable, so no
signal to couple. Shielding works both ways, it stops elecrtic field being
radiated, it also stops them being picked up.

thanks again
jeff




--- In mach1mach2cnc@..., Robin Szemeti <list@r...>

wrote:
On Saturday 06 March 2004 22:30, Ed Gilbert wrote:
Hi Jeff,

You should try to keep the signal and voltage wires as far apart
as

physically possible. If the wires do come in close proximity or
cross each

other try to do it at 90 degree angles, do not run them parallel
as this

increases capacitive coupling.
Although you are correct about the coupling, I beleive you are
fundamentally

wrong about the approach. If you have to keep your encoder wiring
phyiscally

separate from the motor drive wiring that is telling you that you
have got

something badly wrong with your shielding. The *correct* solution
is to get

the shielding right so it doesn't matter where you put the wires.
Any other

solution is just a sticking plaster waiting for a stray pulse to
come along

and upset things.

--
RapidCut CNC Technology

CNC Plasma Cutter
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CNC Plasma Cutter
Re: G41 (was: First drawing software)

Jeremy Taylor
 

OK - so how do I determine which side of my drawn lines gets the
compensation?
If I'm doing a cut out, I need the compensation to fall on the inside of the
cut, IF I'm forming a piece, I'd need the compensation on the outside,
however I cant seem to figure out how to tell Mach2 which I want to do,
doing as you described in the previous reply.
Art suggested a while ago, that it MUST be done in the CAD program. and
hence my hand redrawn designs whit the lines falling on center of the cut.
And my lines are set back 1.5mm so that the end result is what I needed.

JT

----- Original Message -----
From: "Robin Szemeti" <list@...>
To: <mach1mach2cnc@...>
Sent: Saturday, March 06, 2004 5:40 AM
Subject: Re: [mach1mach2cnc] (First drawing software (was cnc plasma)


On Saturday 06 March 2004 10:13, Jeremy Taylor wrote:
Which versions of your software, have the capacity to figuring tooling
offset, or... bit diameter?
I already have Mach2, but I've been using Vector Engineering's .free
quick
tools, and I have to "hand" offset my drawings by 3mm (diameter of bit)
to
keep them true.
no you don;t :)

you can just put a 3.0mm dia tool in the tool table, select that tool and
then put G41 or whatever in your GCODE file and it will offset and apply
cutter radius compensation on the fly.

I'm looking for something that can automatically do this
for as little $$ as possible.
For automtaically doing it, Dolphin CAM is probably the most cost
effective
option. For 3 axis stuff it simple to use compared to some of the more
bells&whistles packages likr VisualMill, but .. its all there. Hunt around
for the Mach2 special offer on Dolphin which brings it down to a very good
price.


Jeremy Taylor

----- Original Message -----
From: "Michael Milligan" <zen11777@...>
To: <mach1mach2cnc@...>
Sent: Saturday, March 06, 2004 2:30 AM
Subject: RE: [mach1mach2cnc] (First drawing software (was cnc plasma)

Scout

You can download Dolphin CAD for
Free, at the moment this is available from our
Website, www.dolphin.gb.com <> .

This will provide you with a 1st rate drawing
module which supports DXF export.

Regards

Michael
Dolphin Cad Cam Systems Ltd

-----Original Message-----
From: Hugh Smith [mailto:smithh@...]
Sent: 06 March 2004 01:48
To: mach1mach2cnc@...
Subject: Re: [mach1mach2cnc] (First drawing software (was cnc plasma)

Scout,

I just purchased QuickCad 8 from
for USD48.00 + the normal
S&H&T. I use AutoCAD a lot and for 2D work QuickCad is easier.
QuickCad does not do 3D and exports a dxf if wanted. Its been able to
do everything I've asked of it, and for $48.00 whats to lose.

Hugh
----- Original Message -----
From: dk32544
To: mach1mach2cnc@...
Sent: Friday, March 05, 2004 2:24 PM
Subject: [mach1mach2cnc] (First drawing software (was cnc plasma)


Well, thanks for all the great info. Looks like what I need to do
is
just
get some drawing software and start practicing. Which leads me to my
next question.

For the near term future I'll be doing simple shapes - brackets and
such. I guess most 2D shapes are simple, but I won't be doing much
metal art until probably next year. So what software should I buy
to
start out with: Corel Draw, Quickdraw, or something else? I have
heard of some problems with Corel Draw for this type of work, but
don't
remember what the issue was. P.S. I already have the ruler but I'm
not

sure if it's Windows XP compatible. lol.

Scout


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------
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wobble switch

 

Has anyone found where you can buy this switch
D5B-5511 from Omron. The don't stock then and so far I can't find anyone
that does.
Thanks
Jim
Re: Version 5.0

Steve Blackmore
 

On Sat, 06 Mar 2004 23:20:05 -0000, you wrote:

Setup worksheets.
CAM function!

(sorry, couldn't resist)
Neither could I..
--
Steve Blackmore
Re: Version 5.0

 

Setup worksheets.

Monte
(sorry, couldn't resist)
Re: How close can the wires be ? - Advice needed.

 

Thanks for the repiles,



I dont have any problems yet, because the system is just being wired.
I currently have wired the step and dir. lines and their drains are
terminated inside of a metal box that is shared with a breakout
board.
Only one end of the drain is connected and thats the end nearest the
breakout board. I believe this is correct , please let me know
if i'm wrong.
the encoder wires also have a drain that i was planning on running
inside of the breakout board metal box along with the step and
dir. wires, would this be the correct way to wire those?
when Ed refered to capacitive coupling, would that occur
between AC and DC wiring or DC and DC wiring?

thanks again
jeff




--- In mach1mach2cnc@..., Robin Szemeti <list@r...>
wrote:
On Saturday 06 March 2004 22:30, Ed Gilbert wrote:
Hi Jeff,

You should try to keep the signal and voltage wires as far apart
as
physically possible. If the wires do come in close proximity or
cross each
other try to do it at 90 degree angles, do not run them parallel
as this
increases capacitive coupling.
Although you are correct about the coupling, I beleive you are
fundamentally
wrong about the approach. If you have to keep your encoder wiring
phyiscally
separate from the motor drive wiring that is telling you that you
have got
something badly wrong with your shielding. The *correct* solution
is to get
the shielding right so it doesn't matter where you put the wires.
Any other
solution is just a sticking plaster waiting for a stray pulse to
come along
and upset things.

--
RapidCut CNC Technology

CNC Plasma Cutter
148101 - 148120 of 155599