On 12/31/2015 10:24 PM, John Thornton wrote:
> I went and checked the control transformer and one side is 48v to ground
> and the other side is 79v to ground. I guess I was confused by that.
I did a quick calculation and if your protective ground has a voltage
with a phase shift of about 62
On 01/01/2016 01:02 PM, John Thornton wrote:
> So tie say the 48v side to ground to create the neutral? I attached the
> drawing of what I have so far on the VFD side.
No, then you just short a capacitive path to ground.
If you have no neutral, then you do not have it. All voltages you
measure
On 01/01/2016 05:16 PM, Peter C. Wallace wrote:
>> The bandwidth of rs232 style serial connections is so low that you will
>> not see any problems with twisted pairs. I assume that you are not
>> connecting half a kilometer of cable with a speed higher than 115k2 baud
>> (or you may run into
On 01/01/2016 05:47 PM, Dave Cole wrote:
> That's done all of the time. In fact it is part of the NEC (National
> Electric Code) that is followed (for the most part) in the US.
> Pretty much every house in the US is wired like that. (I'm not making
> this stuff up. :-) )
I agree with the
On 01/01/2016 05:13 PM, Dave Cole wrote:
> Anytime you have a 120 volt source for computer, misc power etc, you
> need to declare one side of the 120 vac winding the neutral (white wire)
> and tie that terminal to the machine frame.
> It similar to what is required at the service entrance of
Hi all mechanical engineers,
I am looking for mechanical drawings of a rattling arm of a
one-armed-bandit, aka slot machine.
The arm of those old slot machines will make that distinguished rattle
sound while being pulled and then, at the end, the mechanism will reset.
The arm will only reset if
On 01/01/2016 12:09 AM, Chris Radek wrote:
> Repeating watches (watches that chime the time when you pull a
> lever) have a similar mechanism, where the action of pulling winds
> up a spring that is used to run the chiming machinery, and they
> usually have a "go/no-go" system that guarantees you
On 12/31/2015 10:20 PM, John Thornton wrote:
> On the 120v side if I measure from the hot to the ground I get 79 volts,
> if I measure from hot to neutral I get the expected 128v... what is that
> telling me?
It tells you:
(protective) Ground != Neutral
(protective) Ground is for protection,
On 12/29/2015 08:59 PM, John Thornton wrote:
> An update, I got the serial isolator but it did not work out of the box.
> It had something about DTE and DCE that I didn't understand how to tell
> what the GS2 uses and can't find anything about DTE or DCE in the manual...
DTE/DCE is whether you
On 12/28/2015 04:25 AM, Dave Cole wrote:
[snip]
> I do a lot of machine wiring and I was redoing a machine for a major
> electrical manufacturer in the US (although this particular plant does
> hydraulics)
> and the plant maintenance nitwits tied a relay coil between a 480 volt
> hot leg and
On 12/26/2015 05:30 PM, Tomas Jarmolaitis wrote:
>> F.ex. I use a 230V/230V isolation transformer at work rated at 1.6kVA.
>> It weighs in at 36kg and cost about $1200,- (ex VAT).
> I think, your transformer is highly overpriced (maybe there is reason for
> that, f.e. medical sertificate or IP
On 12/26/2015 07:36 PM, John Thornton wrote:
> You misunderstand, all those components are internally grounded I did
> not ground any of them. I just showed that the shell on each component
> is bonded to the ground connection on each device.
Ok, now the real question is whether you can see the
On 12/26/2015 08:09 PM, John Thornton wrote:
> I found this on amazon
> http://www.amazon.com/UT-211-Port-powered-Mini-size-PhotoElectric-Isolator/dp/B00GI9GS58/ref=sr_1_3?ie=UTF8=1451156759=8-3=serial+isolator
That is "port-powered", which may or may not work in your case. It
depends on which
On 12/26/2015 08:19 PM, Bertho Stultiens wrote:
>> Not sure how I might isolate the VFD from the chassis at this moment.
>> Well I could machine some delrin standoffs... I have a machine shop.
>
> No problem. If you ensure that the chassis connection is firm and
> electri
On 12/26/2015 08:19 PM, Bertho Stultiens wrote:
> On 12/26/2015 08:09 PM, John Thornton wrote:
>> I found this on amazon
>> http://www.amazon.com/UT-211-Port-powered-Mini-size-PhotoElectric-Isolator/dp/B00GI9GS58/ref=sr_1_3?ie=UTF8=1451156759=8-3=serial+isolator
>
> That is
On 12/26/2015 09:33 PM, John Thornton wrote:
Not sure how I might isolate the VFD from the chassis at this moment.
Well I could machine some delrin standoffs... I have a machine shop.
>>> No problem. If you ensure that the chassis connection is firm and
>>> electrically sound, then you
On 12/26/2015 06:10 AM, Greg Bentzinger wrote:
> I was always told "Never rectify straight from AC mains without an
> isolation transformer." Bad Karma - Bad Ju ju - will come back to
> bite you.
I tend to agree that you normally want to use a transformer. However, a
2kVA transformer is
On 12/26/2015 09:32 PM, John Thornton wrote:
Not sure how I might isolate the VFD from the chassis at this moment.
Well I could machine some delrin standoffs... I have a machine shop.
>>> No problem. If you ensure that the chassis connection is firm and
>>> electrically sound, then you
On 12/27/2015 12:22 AM, John Thornton wrote:
> It's single phase 240v but no neutral, each leg is hot 120v and if
> measured to ground you get 120v. Measured between the two hots you get
> 240v.
Ah, it is a two-phase system (because you still have a neutral). Each
phase is 180 degrees apart
On 12/27/2015 12:51 AM, John Thornton wrote:
> There is no neutral in the machine, only L1 L2 and GND. The Neutral for
> the house is bonded to ground at the panels. I'm getting 120v from the
> step down transformer for the machine.
Alrighty... I think I now understand how it is connected. Took
On 12/26/2015 11:53 PM, John Thornton wrote:
>>> Yes, that was my plan to run everything off of 120v except the VFD.
>> However, your drawing shows the VFD to be on the 120V side.
>>
>> I am a bit confused now which is on what and where.
> Ah the two 120v lines without a neutral is 240v, sorry if
On 12/27/2015 01:32 AM, John Kasunich wrote:
[snip]
> John T has already responded with the specifics of his situation. Some
> more background on US residential power:
>
> The transformer is typically mounted on a pole and serves several houses.
> The neutral is connected to a ground rod at the
On 12/26/2015 11:29 PM, John Thornton wrote:
> Do I still need the line reactor in front of the filter for the VFD?
That depends.
You said in the last message:
> Yes, that was my plan to run everything off of 120v except the VFD.
However, your drawing shows the VFD to be on the 120V side.
I am
On 12/25/2015 11:25 PM, John Thornton wrote:
> There is no transformer in there...
Ah, sorry about that...
The second variable should then be considered, mains tolerance.
The usual tolerance of the mains line is between +20% and -30%. If that
seems large, it is. If you ask the company what you
On 12/26/2015 12:42 AM, John Thornton wrote:
>> [240V mains]--+--[vfd filter]--[VFD controller]--[spindle]
>> |
>> +--[mains filter]--[ctl transformer]--[control]
>> The interesting part in now how earth is connected in the "VFD
>> controller" and the "control". If the
On 12/25/2015 11:05 PM, Gene Heskett wrote:
>> The bridge rectifier is connected to 120v so no transformer is
>> there... not sure how it gets 190vdc out of 120vac but it does. Now to
>> find some fuses for it... may be Tuesday before I can use that.
> That is a puzzle John, the best DC I can get
On 12/25/2015 11:51 PM, John Thornton wrote:
[snip]
> So from the distribution blocks the
> 240v goes to the VFD filter and the control transformer. I have a second
> filter for the 120v side, should that go just after the control transformer?
Could you make a (quick and dirty) drawing?
The
On 12/21/2015 02:48 PM, andy pugh wrote:
>> Where did you get the filter from?
> search eBay for "Rasmi filter" and find one with the right number of
> phases and current rating for your system.
>
> The suggestion from Bertho sounded to be worth a try too.
Yes, to expand slightly with all the
On 12/21/2015 03:34 PM, andy pugh wrote:
>> The "wisdom" people said in that case was: "put the plug in reversed".
> Not possible with the infinitely superior[1] BS 1363 plugs and sockets.
Agreed.
However, how many people have been able to connect the wires wrong? (not
counting the sealed
On 12/21/2015 12:59 AM, John Thornton wrote:
> An update, I made a star grounding configuration so EVERY ground comes
> from the same place. I tested with the VFD unplugged and all is fine,
> plug the VFD in and same problem sserial errors. The VFD is 220v so to
> use one power source I'd have
On 07/29/2015 01:07 PM, Robert Ellenberg wrote:
Pompeo Kirkman kiosk I kid in ipm Kiki Kokomo Kiki I ijkukKokomo Kiki Kik
Kiki the I just just my Jim kipm I kill Kokomo Kiki kiosk imp the
MIkkujkujk hiking j imitation I K my I I'm K kk I am KikiI I I
ikkjiiujklukk Kiki nonono iok Kiki just
On 07/08/2015 11:11 AM, Mark Wendt wrote:
There may be many different ways to skin a cat - but first I'm told I have
to kill the thing 9 times.
You're in trouble with radioactive cats though. They have 18 half lives.
;-)
And then you still have (2^-18 =) 3.8 micro cats left. Those beasts
On 07/08/2015 02:54 PM, Mark Wendt wrote:
A radioactive Shrödinger's cat will have 18 half lives and deaths. ;-)
Oh man, watch where you are going. You are inviting between 2^-18 and
2^18 living corpses. I'm surely not gonna clean up that zombiepocalypse
mess in the shop.
(ok, we've
On 07/04/2015 12:52 AM, andy pugh wrote:
On 3 July 2015 at 23:43, Bertho Stultiens ber...@vagrearg.org wrote:
Well, not really as a flag. The strokes are a the primary part of the
font-definition. It would mean to create an alternative version of the
font face.
I was just about to suggest
On 07/04/2015 02:28 AM, Gene Heskett wrote:
If we assume a mill with zero backlash and spindle-speed very much
larger than the feed-rate, would you still care or be careful about
direction?
Call me a picky old fart,
I would not dare call you picky.
Oh? why not?
Lets just say that I
On 07/04/2015 12:18 AM, Bruce Layne wrote:
Even on a CNC router or a mill, there is a large amount of variation in
the results depending on spindle speed, cutter diameter, grain structure
and other physical properties of the material being engraved, etc.
Secondary operations are also a
On 07/04/2015 01:06 AM, Gene Heskett wrote:
What is the experience of the people here? What would be preferable? A
quick (case 1) path or a directionally consistent path (case 2)?
If you see more than a nearly invisible artifact using the first method,
then it is time to tweak the backlash.
On 07/04/2015 01:54 AM, Stephen Dubovsky wrote:
If you look at something like Vectric's V-carve Pro it does the faster
no-lift case. I suspect the high-end Aspire tool does the same since they
are based on the same code base. For something like an A they don't even
lift to go back a little
On 07/04/2015 01:48 AM, Gene Heskett wrote:
If we assume a mill with zero backlash and spindle-speed very much
larger than the feed-rate, would you still care or be careful about
direction?
Call me a picky old fart,
I would not dare call you picky. The other part I have no comment. ;-)
Hi all,
While porting the Hershey fonts for engraving it occurred to me that
they are very heavy in pen-up/down movements because many strokes are
partials. There is plenty of room for optimization, reducing the rapid
moves by about 30%, but that means that engraving is not done in a
consistent
Hi all,
A new version 1.7.0 of gcmc has been released.
Major addition in this release is the inclusion of the Hershey vector
fonts. The source-fonts have been reordered, fixed and mapped to
unicode(*). The Sans-fonts have been substantially augmented including
accented characters for latin-type
On 06/15/2015 04:42 AM, Gene Heskett wrote:
Copyright 2015 Maurice E. Heskett, all rights reserved.
I had printed out something I had an interest in a few days ago, and when
I picked it up just now, I see a very disturbing to me, notice at the
bottom of the last page saying
CopyRight
Hi all,
A new version 1.6.0 of gcmc has been released.
This release adds a couple of features to the compiler, such as:
- constant variables using the const keyword
- default function arguments
A couple built-in functions have been updated and added:
- move() and goto() now accept vectorlists
On 05/14/2015 11:05 AM, andy pugh wrote:
A screen blanker is especially annoying with a touch screen CNC
machine. Pressing a random button on the screen to wake it up is a
special kind of dangerous.
So that is why I see all those cut-out post-it notes on the machines ;-)
--
Greetings
On 03/28/2015 08:37 PM, kqt4a...@gmail.com wrote:
I have a question about the voltage to drive a stepper motor
12 volts works but higher voltages make the motor weaker
I am building a simple stepper driver
A nema 23 2.7 amp stepper motor and 36 volt power supply
The controls are hand held,
On 03/23/2015 05:25 PM, TonyZPP wrote:
Thank you for continuing to support your program, GCMC, and for keeping
it current. I use it often. It has served me well.
You are welcome. I love to fix gcmc's bugs(*) and implement useful
features. The more users, the better it gets ;-)
(*) That is,
Hi All,
A new version 1.5.3 of gcmc has been released.
This release is a bugfix release and fixes relative movement. The
movement would be calculated twice if the destination was within 1e-12
(epsilon) of zero, resulting in the wrong path.
You can get the new version from the homepage:
On 03/17/2015 12:33 AM, Karlsson Wang wrote:
The frequency converters I have seen for electric motors generate a
square wave voltage. To generate a sinus the duty cycle is varied to
get sinus voltage in average and usually the current is close to
sinus.
Most modern converters are class D
On 03/17/2015 10:21 PM, Philipp Burch wrote:
Now the question: Does anyone here have an idea how or where to get some
spares of those adapters? The part# 131-4244-00 does not seem to exist
anymore.
I'd take a small PCB with copper on both sides, drill a couple of holes
the right place and
On 03/16/2015 09:40 PM, Karlsson Wang wrote:
A shield is primarily intended to prevent electrostatic coupling from
the outside world. So by grounding in the consuming end the shield
will get the ground potential of the consumer and the signal cables
will be shielded from different external
On 03/16/2015 07:33 PM, Greg Bentzinger wrote:
Pardon my ignorance...
But is there a significant difference between use of shielded cable
between VFD and motor vrs lines in hard or flex metal conduit which
makes a complete ground at each end?
Both cable-shield and a conducting cable-pipe
On 12/20/2014 04:18 PM, Pete Matos wrote:
I am out of the office until 07.01.2015.
LOLMerry Christmas!!
Do such messages still get you banned (permanently)?
I surely hope so... The autoreply of the digest's digest can send
another away message, then another and another.
--
Greetings
On 12/01/2014 12:46 AM, Gene Heskett wrote:
The updated documentation is online at:
http://www.vagrearg.org/content/gcmc-into
Should be:
http://www.vagrearg.org/content/gcmc-intro
Yes. is this very complete web page available in pdf for making dead
tree copies? It would be bound and
On 11/30/2014 11:08 PM, TZ(Paypal) wrote:
Have you considered doing a YouTube video that shows how gcmc is
used? If you include CNC and Gcode in the title, I think you will get
a lot of exposure.
For example, take a look at the following video. He already has 5600+
views since Nov. 6th 2014.
On 12/01/2014 09:08 AM, alex chiosso wrote:
I'm following you since the beginning on this list and I've to say
that your work is really nice and professionally made.
I try to bo my best ;-)
I usually don't use cnc's for machining parts but to do material
handling or such so I need to make
On 12/01/2014 06:25 PM, alex chiosso wrote:
This is an abstract of a post (that I opened a couple of months ago) on the
conditional-unconditional nc program flow control .
USA brand CNC manufacturer (Delta Tau PMAC-NC Pro2
http://www.deltatau.com/manuals/pdfs/PMAC-NC%20Pro2.pdf) and they
On 12/01/2014 06:52 PM, Jon Elson wrote:
All CNC machines use turtle graphics in 2D, 3D, 4D, etc.
No, turtle graphics is a scheme where the coordinate system is
centered on the turtle, and everything is relative to which way the
turtle is pointing now. So, if the turtle makes a 90 degree turn
On 12/01/2014 07:01 PM, andy pugh wrote:
On 1 December 2014 at 16:58, Bertho Stultiens ber...@vagrearg.org wrote:
Well, yes, gcmc is a paradigm shift from plain gcode. That leap is
easiest to see for those who have coded before in similar languages.
I am not suggesting that you (or anyone
On 11/30/2014 03:46 PM, Gene Heskett wrote:
On Sunday 30 November 2014 07:04:10 W. Martinjak did opine
And Gene did reply:
On 2014-11-27 15:46, Bertho Stultiens wrote:
The updated documentation is online at:
http://www.vagrearg.org/content/gcmc-into
Should be:
http://www.vagrearg.org
On 11/30/2014 01:02 AM, TZ(Paypal) wrote:
Thanks for writing/maintaining gcmc. I like the addition of the . operator
for vector field access.
I can't wait to try it!
It is my pleasure to maintain the code. I find it useful too ;-)
The addition was suggested and I actually wondered why I did
Hi All,
A new version 1.5.2 of gcmc has been released.
This release is a primarily a bug-fix release to fix arcs in the YZ
plane. The release also adds new examples and a language feature to
address vector coordinates as fields (v[0] can now be written as
v.x). The documentation has been
On 06/12/2014 05:38 PM, sam sokolik wrote:
This is even sexier
Torchoidal path.. (graphing x and y acceleration and xyz velocity)
[snip]
Now I am a bit proud of myself with making the trochoidal example code.
Oh vanity, sometimes nice, other times it has a price ;-)
--
Greetings Bertho
On 03/26/2014 12:59 AM, Dave Cole wrote:
No. To carry this to its logical conclusion, fix the phone to the
table, locate the keys, then lay an 1/8 sheet of rubber over the
phone which will have the side effect of keeping the swarf out of the
keypad, stop the spindle and use the existing tool
On 03/24/2014 08:28 PM, andy pugh wrote:
Maybe check your phone provider for a SMS e-mail or other port?
http://www.ehow.co.uk/how_6510217_send-message-o2-cell-phone.html
Hmm, certainly looks simpler than stopping the spindle and stabbing
the quick-dial button with the tool :-)
Why would you
On 03/24/2014 09:34 PM, Gene Heskett wrote:
Maybe check your phone provider for a SMS e-mail or other port?
http://www.ehow.co.uk/how_6510217_send-message-o2-cell-phone.html
Hmm, certainly looks simpler than stopping the spindle and stabbing
the quick-dial button with the tool :-)
Why would
On 03/21/2014 05:05 PM, sam sokolik wrote:
heh - isn't that how we all dress?
That depends on how many lumps still hang together on my coat. It has
some signs of wear and tear.
I had to post some scopes of the torodal gcode.
The new tp - strait G64
http://imagebin.org/300857
xyz - velocity
On 03/21/2014 07:06 PM, sam sokolik wrote:
I was wondering how I could check that.. I don't know - but I can tell
you this..
At G64p.002q0
P is in mm and my config. 30in/s^2 and 500ipm per axis..
the velocity just starts to dip - just wiggles between 3000 and
2999mm/min. If I do p.001q0
On 03/21/2014 07:43 PM, sam sokolik wrote:
there is a limitation of 'too short' Rob explained it in a dev email
(discusing the Q part of G64)..
Unfortunately, the new TP still has the restriction that you have to touch
each segment at least once. A small NCD tolerance is still
On 03/20/2014 01:28 PM, sam sokolik wrote:
some more random paths running the circular arc blend rc3...
I just tested trochoidal milling using the example I created for gcmc:
- image: http://www.vagrearg.org/gcmc/example-trochoidal-large.png
- source:
On 03/20/2014 02:38 PM, sam sokolik wrote:
Could you post that gcode somewhere? (I don't have time right now to
play with your cool scripting language..) It could be the
centripetal accel limits of the spirals..
Yes, I also suspect the centripetal accel limits may be a problem here.
You can
On 03/20/2014 02:46 PM, Bertho Stultiens wrote:
On 03/20/2014 02:38 PM, sam sokolik wrote:
Could you post that gcode somewhere? (I don't have time right now to
play with your cool scripting language..) It could be the
centripetal accel limits of the spirals..
Yes, I also suspect
On 03/20/2014 03:19 PM, sam sokolik wrote:
the limit of sim is 1800mm/m - so if you change all the axis velocities
to 58mm/s (3500mm/m) it peaks at 2900mm/min. Upping the acceleration to
1000mm/s^2 makes the program run at 3000mm/m steady.
Indeed, with that setup the trochoidal path will be
Hi All,
A new version 1.5.1 of gcmc has been released.
Important fix in this release are correction of a couple of memory
issues that could lead to wrong results and corruption. You should
upgrade to 1.5.1 to avoid running into these problems.
The syntax documentation has been expanded and a
On 03/07/2014 02:12 PM, Mark Wendt wrote:
snippage
Does anyone have any ideas about how to calculate the F word?
Sorry John, I just had to have a chuckle about that... ;-)
Oh my...
Doesn't the /not working/ of the code already calculate the remaining
letters?
Please don't tell me a mill
On 03/02/2014 01:14 PM, Mark Wendt wrote:
One can also use http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Emcrsh or
http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Halrmt for remote controlling.
It's an easy thing to use telnet socket in and Android app.
Telnet is extremely unsecure, with no encryption.
On 02/22/2014 05:33 AM, Greg Bentzinger wrote:
Yeah - I did some digging and that whole L word in a fixed cycle
dates back to the original NIST RS-274D-NGC. IMHO - Its a dinosaur
that should have died out. I consider it an accident waiting to be
activated by the user.
I agree that it is
On 02/22/2014 11:16 PM, Stuart Stevenson wrote:
What is the L supposed to do?
The way I read the program the tool would:
G0 X1 Y2 Z3 - move (in G90) to X1 Y2 Z3 or (in G91) move 1 inch X
, 2 inches Y and 3 inches Z
See:
Hi All,
A new version 1.5.0 of gcmc has been released.
There have been quite a few changes on the syntax and semantic level, as
well as additional built-in functions for various things.
An important semantic change is how add/subtract (+ and -) handles undef
values. A second set of operators +|
Hi,
I've been looking into the canned cycles in LinuxCNC and the relative
version is odd.
The gcode documentation has an example:
G0 X1 Y2 Z3
G91 G98 G81 X4 Y5 Z-0.6 R1.8 L3
It should make a nice pattern, but it drills in the wrong direction
(down-to-up). The R-word need to be -1.8 (negative)
Hi All,
A new version 1.4.3 of gcmc has been released.
The major change is a bugfix in the execution of if/elif/else
statements, where the final else would fail to executo when all if/elif
clauses were false.
Changes include:
- Feature: Add option --gcode-nom2 to replace ending M2 with % in
On 12/17/2013 12:23 PM, Gene Heskett wrote:
I wonder if this is anything like that?
http://www.youtube.com/watch?v=2SozZ7af3wg
No, no resemblance to my idea, and TBT that driver would be dangerous
unless its feedback does go into LCNC so LCNC knows it is not where LCNC
told it to be. Cute
Hi,
Is there a reason, other than the RS274 standard, why there are only
5000 numbered variables available?
I am trying to create a compiling backend to gcmc and the maximum
complexity of the program will depend on the available storage. The
gcode interpreter has enough Turing completeness to
On 12/17/2013 03:33 PM, andy pugh wrote:
I am trying to create a compiling backend to gcmc and the maximum
complexity of the program will depend on the available storage.
You could use named variables instead.
Not for indirect addressing. A lot of the memory needs to be addressed
using #[var]
Hi All,
A new version 1.4.2 of gcmc has been released.
The major change is the addition of g-code function generation
(--gcode-function option) as well as the ability to reverse vectorlists
for easier alternating path movements. The documentation now also
includes the return values of the
On 12/06/2013 07:07 PM, Florian Rist wrote:
So my question is, to someone who may have tried/done this, is can a 1
ounce layer of copper be burned away rapidly enough so as not to leave a
burned, conductive path where the copper was?
I tried this with two different Lasers sources:
120 W CW
On 12/06/2013 07:56 PM, Gene Heskett wrote:
PS: There was a ns pulsed UV Laser (quadrupled YAG) on ebay recently,
this would be the right one for the job. I was close to buying it was
quite cheap.
unfortunatly not , copper for one will absorb the heat .
and for a laser to work it realy needs
On 12/06/2013 08:24 PM, Gene Heskett wrote:
Hence the cataract warnings that seem to surround the long IR CO2 models.
Unforch I do have some already.
Cataract inducing lasers are at ~1500nm (often Yag type lasers). The
1.5um is small enough to pass through the cornea and will induce
On 12/05/2013 11:52 AM, andy pugh wrote:
But showing and moving machine and vises is a minor thing compared to
material removal I think. Although I don't think it is trivial.
I wonder if a voxel-based approach is simpler, but it rather depends
on the required precision.
If 1mm voxels on a
On 12/05/2013 12:05 PM, Bertho Stultiens wrote:
The voxel approach is a valid one. You can reduce the data-set size by
merging voxels in a plane and volume. There are tree-algorithms to
handle such cases and there is an advantage that you only need to split,
never merge. However, using trees
On 12/06/2013 01:46 AM, Robert Ellenberg wrote:
As some of you know already, I'm working on an improvement to the linuxcnc
trajectory planner that will allow much faster movement for engraving-type
programs with lots of short segments. As part of this effort, I need test
cases, both to find
On 12/06/2013 02:37 AM, Robert Ellenberg wrote:
You could use the wheels.gcmc example from gcmc (contributed by Alan
Battersby). It creates a lot of small segments of 10..100um. You can
even increase the number of segments by decreasing the angle-interval of
the calculation (currently at 0.01
Hi All,
A new version 1.4.1 of gcmc has been released.
The major changes are adding the command-line defines (-D option),
revamped documentation and RPM and DEB package management files for
automatic package generation.
Changes include:
- Feature: include unix man-page
- Feature: revamp
On 11/25/2013 08:09 PM, Bertho Stultiens wrote:
However, I've been thinking about exporting to an openSCAD script
through rs274 (or sai through linking tolibrs274.so).
I did a really quick hack to export the feed movement to a script and
could create a 3D representation of the cut result
On 11/25/2013 10:25 AM, Dave Caroline wrote:
I have not seen http://openscam.com/ mentioned yet.
also there are a couple of other experiments
http://www.anderswallin.net/tag/cutsim/
gdepth at http://emergent.unpythonic.net/01169521961
This is a bit of a sad story... I too have been looking
On 11/25/2013 02:47 PM, Anders Wallin wrote:
I have a feeling many of these CAD/CAM things require more knowledge than
fits in the average open-source developers brain.
I would not quite put it like that. There are some brilliant people out
there. Not all will perform equally on all subjects.
On 11/25/2013 04:26 PM, John Murphy wrote:
I use opensCAM and it works great, trivial install on ubuntu.
Well, I tried to install ubuntu 12.04 LTS in a VM, but it locks up X all
the time.
However, I've been thinking about exporting to an openSCAD script
through rs274 (or sai through linking
Hi All,
I've been incrementally improving gcmc to support more and more features
for easier and more general use. The new 1.4.0 version is a larger step
forward and includes multiple backends to output in G-code, SVG and DXF
formats. This enables gcmc to be used not only for mills/lathes, but
On 11/24/2013 06:40 PM, Lars Andersson wrote:
thanks for your fine work! Really enjoy this.
You are welcome. I also enjoy creating the program :-)
I'm wondering about a small detail; how do I convert a vectorlist with
one element as returned from tail(vectorlist, 1) into a vector as
On 11/24/2013 08:09 PM, Tony Zampini wrote:
In general, if you have a one element vector list, and want to use it
where a vector is required (such as the move() statement), you can simply
include the index of the first (and only) element, which is 0. For example:
move(vectorlist); //
Hi All,
An updated version 1.3.1 of gcmc is available. Changes include:
- Add circle_cw(_r) and circle_ccw(_r) functions for full circles. Arcs
cannot unambiguously create circles because the center-point cannot be
calculated from the radius alone.
- Fix command-line segfault in long options
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