Hi Kirk,
Yes, basically you reflect the X axis about the origin. The only problem
is that this has to be done in your current coordinate system, before
the tool offset is applied. If I understand your solution correctly it
would change the machine coordinates. X=0 in machine coordinates will
The GUI also needs to know about this. Presumably there is a way of
notifying the GUI if a Gxx is issued to change between radius and
diameter. Does anyone know if any other control uses a suitable G-code
for this?
Les
Jeff Epler wrote:
It should almost certainly be a modal code, similar to
Hi Chris,
The manual I have (but can't find) for a (mumble mumble) Fanuc
lathe control says I,K are still radius even when X is diameter. I
don't know how universal this is. But it makes sense to me - when you
talk about the radius of a feature on a lathe part (like a fillet) you
don't
Hi Jon,
If you just want diameter readout, what would happen if you changed the
INPUT_SCALE to be half the value?
BTDT. The problem, as you mentioned, is that arcs come out elliptical.
First part doesn't sound too hard, but I haven't heard of anyone using
the joystick inputs like
Hi Jon,
Actually absolute I,J isn't that uncommon. Many controls have a
parameter to select either absolute or relative I,J.
Les
Jon Elson wrote:
I and J in absolute is VERY odd, not standard at all. I think you would
need to write a computer program in your favorite language to read in
Does anyone know the current state of lathe support? I have been
searching through the wiki and docs and haven't found a definitive list
of what is actually implemented at the moment.
CSS?
radius/diameter modes?
Threading canned cycles?
Thanks,
Les
Hi Aaron,
With inside corners you will always get a fillet due to the radius of
the cutter. You can reduce the problem by using a smaller cutter. If you
are cutting a pocket for a sharp edged part to fit into, open the cut
operation in SheetCam and go to the cut path tab. Turn on
If you want a graduated wheel then you have to turn it slow enough that
the machine can keep up. There isn't any real way round this. Even
expensive industrial machines have this limit. However with their very
high rapid speeds you can't spin the wheel fast enough to have a
problem. One way
Hi Sergey,
IM Service do some nice servos that are ideally suited to a Sherline
http://www.cadcamcadcam.com/index.asp?PageAction=VIEWCATSCategory=11
They also do some nice servo drivers though they are step/direction so
you can't use the encoders as a DRO.
Steppers do work and can be
I do this on my lathe. I use a LED/sensor out of an old ball mouse with
a semicircular flag on the motor that is about 1.5 diameter. The output
of the sensor is open collector(switches to ground). This is in parallel
with the home switch. The home switch is normally closed.
Homing proceeds as
tool motion: 120 x 90 x 20 cm (X-Y-Z)
Posibly a little small. Remember it doesn't cost much more to go bigger.
It does depend raher on what you want to make.
frame material: T-slotted aluminum
Easy to work with though quite expensive if you can't get it second
hand. Remember
Sorry Ray but you are wrong. You have maximum current at low speed and
stationary but maximum power is at high speed (technically it peaks at
the corner frequency) and maximum acceleration. Like any motor, power
out = power in - losses. Look at fig.14 in the step motor basics and you
will see
With a switching drive such as a Gecko the current through the motor is
regulated by adjusting the output voltage. Below the corner frequency
the current is fixed. Above the corner frequency the drive can no longer
supply enough voltage to overcome the inductance of the motor so the
current
Hi Kirk,
Most plastics like a really sharp edge with lots of positive rake. You
want to slice it off rather than scraping it off. The xxGT inserts
generally use a micrograin carbide which allows them to hold a finer
edge. The down side is that they wear faster. However in a plastic like
Use the high positive rake inserts designed for aluminium, such as CCGT
or DCGT. They work well on most plastics. They also work quite well on wood.
As you are probably aware you will end up with long strings that get
tangled up in the work. It helps to program in pauses to break the
strings
I have to admit I don't have a vast amount of experience of the
internals of EMC but it shouldn't be difficult to probe the whole sheet
then generate a correction matrix that is used before the G-code is
generated. Probing a large sheet would be very time consuming.
Do you need this for
Hi Eric,
I replied before but it didn't seem to get through. I think I have found
a problem with the sheetcamlibs package. Try
downloading and installing the sheetcamlibs package again.
If you still get the error, open a terminal and enter the following:
sudo dpkg --force-remove-reinstreq
That is good news. If you do break anything, please let me know. I'll
sort out the extension problem in the next release.
Thanks,
Les
John Thornton wrote:
Les,
I have been trying all the options and trying to break SheetCam TNG for linux
but
nothing has broken so far. The only thing I
Hi Eric,
I think I have found a problem with the sheetcamlibs package. Try
downloading and installing the sheetcamlibs package again.
If you still get the error, open a terminal and enter the following:
sudo dpkg --force-remove-reinstreq sheetcamlibs
You will probably have to enter your
Hi Aaron,
How long ago did you download? I did find a problem with the
sheetcamlibs package last night. It is hopefully now fixed.
Les
aaron Moore wrote:
HI
Trying to intsall Sheetcam TNG onto a fresh install of ubuntu 8.04. When I
double click on .deb file it says the package might be
I am glad that fixed it. It is slightly embarassing to release something
that mungs people's machines :-[
LEs
Eric H. Johnson wrote:
Les,
The new sheetcamlibs package did the trick. Both sheetcam and the packaging
system seem to be working fine.
Thanks,
Eric
What error message do you get?
Les
Emory Smith wrote:
I've had enough.
Won't install on 804.
-
Check out the new SourceForge.net Marketplace.
It's the best place to buy or sell services for
just about anything Open
Hi Andrea,
I had sort of expected that to happen somewhere along the line. The
sheetcamlibs package is a bit of a bodge at the moment. I would have
used the standard Ubuntu wx libs but they are not fully up to date,
also they are not available at all for earlier versions of Ubuntu. I am
not
Hi Lawrence,
That is what I do for the original SheetCam. I can't do it for TNG
because the plugins need to access the libraries at the same time. The
wxWidgets docs specifically state that statically linking in this case
won't work.
I think I have found a way round the issue by having a
Hi Emory,
Sorry about that. You caught me in the procsess of testing some changes.
I have changed over to using a private set of libraries. Uninstall the
existing sheetcamlibs then re-download and install both the libs and
application. Hopefully it should now work.
Les
Emory Smith wrote:
Thanks Moses, I'll look into it.
Les
Moses O McKnight wrote:
Hi Les,
The Ubuntu wx libs are indeed out of date. I get my packages from
http://apt.wxwidgets.org/
The line I use for Ubuntu Hardy 8.04 is:
deb http://apt.wxwidgets.org/ gutsy-wx main
These are the latest wx libs and the
Hi Kent,
Most of the install issues have been with older versions. More recent
Linux distributions are more standardised and easier to work with.
With dialog boxes, the help is supposed to appear on the side of the
window. It works reasonably well on Windows but Linux windows tend to be
a lot
Hi all,
I have just uploaded the Linux version of 0.0.24 to www.sheetcam.com.
This release now comes as a Debian package (.deb). This covers all of
the Debian derivatives such as Ubuntu, Knoppix etc. If you can't use
.debs then let me know and I'll see what I can sort out. I do intend to
support
Hi Aaron,
Thanks for the glowing report ;-)
Autopackage doesn't seem to like ubuntu. I am testing some alternative
packaging methods. I'll make an announcement on this list once I have
something sorted out.
Les
aaron Moore wrote:
Hi
I have just installed sheetcam on my suse box and it is
I'll carry on with my experiments as I would like to support as many
distros as possible but if it turns into too much of a nightmare I'll
make a deb and only support Debian based distros.
Les
Moses O McKnight wrote:
I would second Ray on .deb files. Another thing to consider is that
since
If used incorrectly autopackage installs can go pear shaped. Very.
Yes. I am finding that out the hard way :-(
.run/.sh/.bin have worked well here. I don't know how difficult this might be.
Yes, that is the route I am intending to go. Nixstaller looks to be a
good bet. It has the
The moderators of this list have kindly allowed me to announce the
release of SheetCam for Linux. SheetCam is a general purpose 3.1/2D CAM
package. It was originally aimed towards routing and plasma cutting but
has now evolved into a competent milling package as well. This release
is part of a
method. Give me a few days to see if I
can get it working.
Les
Matt Shaver wrote:
On Wed, 2008-06-04 at 20:16 +0100, Leslie Newell wrote:
As I cannot afford to support packages for every Linux distro, I am
using Autopackage which should install on most reasonably up to date
distros
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