On 4/10/24 01:57, John Dammeyer wrote:
A friend and I have been discussing exactly how to write the G-Code to
create a spiral scroll.
His rotary table 90:1 reduction with a 1600 micro-step motor could be set up
to move N steps for each step of the X axis to create the spiral. But that
approach
As I recall, someone on this list posted a note or a link about how to
create a fusee for a clock (essentially a tapered spiral, running from
large diameter to smaller diameter while spiralling - rather like a
tapered woodscrew thread). Is a constant-diameter version of that what
you had in
On Wed, 10 Apr 2024 at 06:59, John Dammeyer wrote:
>
> Without using G2 or G3 it's really just a triangle isn't it? Move rotary
> table distance A and move X axis distance A'. Do it in small enough
> increments and you get a spiral. But I feel like I'm missing something
> really simple.
If
On 4/10/24 03:37, John Dammeyer wrote:
Hi Marcus,
Here's the problem.
My Alibre CAD/Cam can produce a spiral slot in a disk using X and Y motion.
I looked at alibre, could not get my Iowa farm kid head around it. Far
easier for me to write my own gcode.
In linuxcnc, you can trade the axis
Hi Marcus,
Here's the problem.
My Alibre CAD/Cam can produce a spiral slot in a disk using X and Y motion.
If I tell it to use my 4th axis it's like the video you posted. Designed
for creating a spiral on something horizontal to say the X axis.
I think I'd have to buy the 5th axis
Hello guys, I hope you're doing well
I'm having problems with a Daewoo Puma 12L lathe to index some tools. The
problem is that some tools work well and others don't seem to be detected
by the control to stop at the position and clamp the turret. So the turret
keeps rotatring until the timeout
On Wed, 10 Apr 2024 at 13:03, Leonardo Marsaglia
wrote:
>
> I'm having problems with a Daewoo Puma 12L lathe to index some tools. The
> problem is that some tools work well and others don't seem to be detected
> by the control to stop at the position and clamp the turret. So the turret
> keeps
Hi Andy,
It seems there is a pattern, but it's a pretty weird one. Let me sum it up.
Tools 1, 2, 3, 7 and 9 work will in all the cases.
Tools 4, 5, 6 and 10 can't stop in position and the turret keeps rotating.
The interesting thing is tool 10 was working perfectly a few days ago.
Now tool 8
>
> Digging back into my own by now dim 54 yo memory, is that cpu perchance
> a zylog, z80 or derivitive? The z80 has shadow registers, duplicating
> the main set that there was a machine code to swap them. But zylog were
> AH's and by the time I had troubleshot my code to determine the cpu was
>
On Wed, 10 Apr 2024 at 15:05, Leonardo Marsaglia
wrote:
>
> It seems there is a pattern, but it's a pretty weird one.
Do you know if the output is binary or gray code? Gray code is more
likely.
encoder value
00 = = not used?
01 = 0001 = good
02 = 0011 = good
03 = 0010 = good
04 = 0110
Hi Todd,
Yes, this one has the Balluff BRGE1-WSE10 encoder mounted behind the turret
cover. It's an absolute 10 position encoder and as told in the other
message, I'm just doubting this is the problem. I'm beginning to believe
may be there's a CPU problem because I'm getting too many weird
On 4/10/24 10:08, Leonardo Marsaglia wrote:
Hi Todd,
Yes, this one has the Balluff BRGE1-WSE10 encoder mounted behind the turret
cover. It's an absolute 10 position encoder and as told in the other
message, I'm just doubting this is the problem. I'm beginning to believe
may be there's a CPU
Are you sure that the machine uses an encoder for the turret positioning? The
fact that it will work at some tool positions seems to sound more like it has a
series of switches, and that one of them isn't working. The switches might be
arrayed kind of like a Gray code encoder to give a form
On 4/10/24 08:46, Todd Zuercher via Emc-users wrote:
Are you sure that the machine uses an encoder for the turret positioning? The
fact that it will work at some tool positions seems to sound more like it has a
series of switches, and that one of them isn't working. The switches might be
On 4/10/24 10:58, Leonardo Marsaglia wrote:
Digging back into my own by now dim 54 yo memory, is that cpu perchance
a zylog, z80 or derivitive? The z80 has shadow registers, duplicating
the main set that there was a machine code to swap them. But zylog were
AH's and by the time I had
John,
Here us a subroutine I wrote to cut a scroll.
#<_xorigin>, and #<_yorigin> are the center of the scroll. Basically it changes
the radius of the circle every ¼ turn.
(Subroutine to cut spiral in)
(o call [X] [Y] [Depth] [Stepover] [Radius])
o sub
(#1 is X center)
(#2 is Y center)
(#3 is Z
From what I could find in the manual of the lathe it works in plain binary.
Now I'm trying to measure the signals.
Here's a link to the encoder manual:
https://mp-elektronik.de/wp-content/uploads/2020/07/MP-BA-BRGE1-...-K-SA12-SA13-en.pdf
El mié, 10 abr 2024 a las 12:51, andy pugh ()
On Wed, 10 Apr 2024 at 17:30, Alan Condit via Emc-users <
emc-users@lists.sourceforge.net> wrote:
>
> Here us a subroutine I wrote to cut a scroll.
> #<_xorigin>, and #<_yorigin> are the center of the scroll. Basically it
> changes the radius of the circle every ¼ turn.
This is what I was
G33 for the win!
sam
On Wed, Apr 10, 2024 at 12:31 PM Chris Albertson
wrote:
> Do you even need a rotory table to cut a spiral?
>
> > On Apr 10, 2024, at 12:09 AM, gene heskett wrote:
> >
> > On 4/10/24 01:57, John Dammeyer wrote:
> >> A friend and I have been discussing exactly how to write
Hi Gene,
Just like I can't get my head around Fusion360 or similar CAD.
AlibreCAD has gone downhill since they trashed their relationship with
MecSoft which correspondingly trashed AlibreCAM.
I'll take a closer look at your approach later today.
Thanks
John
> -Original Message-
> From:
Do you even need a rotory table to cut a spiral?
> On Apr 10, 2024, at 12:09 AM, gene heskett wrote:
>
> On 4/10/24 01:57, John Dammeyer wrote:
>> A friend and I have been discussing exactly how to write the G-Code to
>> create a spiral scroll.
>> His rotary table 90:1 reduction with a 1600
I'd take a closer look at the power supplies. A system from 1997 could easily
have electrolytic capacitors that have aged enough to no longer be effective.
If you have an ESR meter you could pull caps and check against new ones. Or
just go whole hog and replace them all.
John
> > >>
On 4/10/24 13:30, Chris Albertson wrote:
Do you even need a rotory table to cut a spiral?
Now that you ask, I think the answer is probably no. Take a look at the
nurbs command G5.2 where a group of points describes the curve. Then
rotate the points about one end in polar/rectangular space.
On 4/10/24 13:03, John Dammeyer wrote:
Hi Gene,
Just like I can't get my head around Fusion360 or similar CAD.
AlibreCAD has gone downhill since they trashed their relationship with
MecSoft which correspondingly trashed AlibreCAM.
I'll take a closer look at your approach later today.
My
Hi Andy,
> -Original Message-
> From: andy pugh [mailto:bodge...@gmail.com]
> Sent: April 10, 2024 1:54 AM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Carving a spiral
>
> On Wed, 10 Apr 2024 at 06:59, John Dammeyer
> wrote:
>
> >
> > Without using G2 or G3 it's
Thanks Alan,
I'll take a look at this later today.
John
> -Original Message-
> From: Alan Condit via Emc-users [mailto:emc-users@lists.sourceforge.net]
> Sent: April 10, 2024 9:27 AM
> To: EMC-Users
> Cc: Alan Condit
> Subject: Re: [Emc-users] Carving a spiral
>
> John,
>
> Here us a
On Wed, 10 Apr 2024 at 19:11, Sam Sokolik wrote:
G33 for the win!
Not a silly idea. You could arrange for an encoder to be rotated by the
rotary table any way that was convenient, then set that up as as the
"spindle" input into LinuxCNC.
Then you could simply wind the rotary table by hand.
--
> On Apr 10, 2024, at 10:44 AM, Ralph Stirling via Emc-users
> wrote:
>
> Use the parametric equation of a spiral and compute it *inside* your
> g-code program.
>
> x(t) = c1 * t * cos(t) + x0
> y(t) = c2 * t * sin(t) + y0
COnceptually that is it. But do you really want to cut afull depth
Found the main issue. The terminal block in wich the turret signals were
connected is broken. Some of them were making contact. I isolate the
terminals and now the no indexing problem is solved.
The only problem I have left to solve is why with some tools (like tool 8
for example) even if the
As I could read this is grey code.
Maybe not any specific pattern. What's great with gray code for absolute angle
is only one bit it changed betweeb each
count so no glitch in between.
Nicklas Karlsson
ons 2024-04-10 klockan 16:48 +0100 skrev andy pugh:
> On Wed, 10 Apr 2024 at 15:05,
Use the parametric equation of a spiral and compute it *inside* your
g-code program.
x(t) = c1 * t * cos(t) + x0
y(t) = c2 * t * sin(t) + y0
Choose as fine a step as you like for t and make a while
loop to generate the x and y values and do G1 moves.
See
On 4/10/24 14:09, Sam Sokolik wrote:
G33 for the win!
forgot that, thanks Sam.
sam
On Wed, Apr 10, 2024 at 12:31 PM Chris Albertson
wrote:
Do you even need a rotory table to cut a spiral?
On Apr 10, 2024, at 12:09 AM, gene heskett wrote:
On 4/10/24 01:57, John Dammeyer wrote:
A
On 4/10/24 15:53, John Dammeyer wrote:
I'd take a closer look at the power supplies. A system from 1997 could easily
have electrolytic capacitors that have aged enough to no longer be effective.
If you have an ESR meter you could pull caps and check against new ones. Or
just go whole hog
Sudo spirals using line segments of arbitrary length are very simple with polar
coordinates.
Here is a small g-code with anl o-sub that make one:
g20 g64 g90
s3400 m3
g0 z1
g0 x2 y0
g1 z-.1 f24
o100 repeat [800]
g91 g1 @-.0025 ^4.5
o100 endrepeat
g90 g0 z1
m2
Todd Zuercher
P. Graham Dunn Inc.
Your tool error problem may be unrelated to the encoder issue. I'd start by
examining the clamping mechanism and related safety switches that tell the
control that the tool is properly locked in position.
Todd Zuercher
P. Graham Dunn Inc.
630 Henry Street
Dalton, Ohio 44618
Phone:
https://www.britannica.com/science/spiral-mathematics
Several options here, take your pick.
Should be trivial to move it from floating pt to fixed.
May have to scale to make it happy. ;-)
Dave
> On Apr 10, 2024, at 12:09 AM, gene heskett wrote:
>
> On 4/10/24 01:57, John Dammeyer wrote:
>>
Hey Andy I see your component supports step direction now.
2 questions.
Does it still do shortest path calculations to speed up tool changes?
And 2nd question does it happen to support analog servo drives with a built
in pid in linuxcnc?
Regards
Andrew
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