On Monday 08 February 2016 08:39:10 Marcus Bowman wrote:
> On 8 Feb 2016, at 12:49, Peter Blodow wrote:
> > In other words, you pretend to cut a left-hand thread but have the
> > machine run in reverse so it turns out right hand?
> > Peter Blodow
>
> Yes; kind of I prefer to think of it as
On 8 February 2016 at 16:12, Gene Heskett wrote:
>
> One question remains: Does the thread even have to have a spiral
> component, eg does it need to actually advance into the hole as it
> turns? Common sense says it should, in order to achieve a gas tight
> seal against a
On 7 February 2016 at 23:37, Marcus Bowman
wrote:
> Easy. mount the tool upside down, and start at the blind bottom.
Sorry, I am not quite understanding your description?
--
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto
On 8 Feb 2016, at 10:04, andy pugh wrote:
> On 7 February 2016 at 23:37, Marcus Bowman
> wrote:
>
>> Easy. mount the tool upside down, and start at the blind bottom.
>
> Sorry, I am not quite understanding your description?
>
Yes; apologies; my rather
On Feb 8, 2016 5:02 AM, "andy pugh" wrote:
>
> On 8 February 2016 at 10:42, Marcus Bowman
> wrote:
> > For an internal right-hand thread, the problem is often that the tool
feeds into the hole from the right, and bumps into the bottom of
On 8 February 2016 at 10:42, Marcus Bowman
wrote:
> For an internal right-hand thread, the problem is often that the tool feeds
> into the hole from the right, and bumps into the bottom of the hole. It would
> be the same for an external thread bumping into
In other words, you pretend to cut a left-hand thread but have the
machine run in reverse so it turns out right hand?
Peter Blodow
Am 08.02.2016 11:42, schrieb Marcus Bowman:
> On 8 Feb 2016, at 10:04, andy pugh wrote:
>
>> On 7 February 2016 at 23:37, Marcus Bowman
>>
When I worked in the shipyard we cut the gun mounts with pretty
conventional home made boring bars made out of H beams and other stuff
with a star wheel on the outside that hit a stob welded to the wall to
increment the tool out. It was turned by a gear motor attached to the
ceiling. Took
Greetings all;
On inspecting the various little subroutine files that go with
camview-emc, the _camon.ngc and _camoff.ngc functions seem to be defined
well enough I can deduce what they do.
Then there is a _camstore.ngc, which records an 8 item array of XY
coords, but whose ultimate function
I managed to get the Anilam chief engineer on the phone one day not long
after purchasing the BP and he walked me through the tuning process of
the drives. I'll take a look to see if I have the same cards as you or
not. For the drives part you need the analog velocity pins and the
enable pin.
LinuxCNC 2.7.4 has been released.
This release fixes bugs all over: in hm2 sserial, GUIs, xhc-hb04,
hy-vfd, stepconf & pncconf, and in the docs. 2.7.4 adds support for RTAI
5.0, though we have no debian packages yet, sorry. It also adds a
component to help drive some kinds of gantry machines
If they are anything like the manufacturer of the drives I'm using with modbus.
You pretty much will have to contact them and have them send you the modbus
manuals for the drive. Googling up the drive did bring up a different manual
that had a more ordinary looking pinout labeling for the
On 09/02/16 05:20, Kirk Wallace wrote:
> (Bottom of page here:
> http://wiki.linuxcnc.org/cgi-bin/wiki.pl?AVR
> has it been five years already?)
Sounds about right ... must get some of these longer term projects
finished ;) That includes a nice modbus module for additional inputs and
control ...
On 2/8/2016 3:54 PM, andy pugh wrote:
> On 8 February 2016 at 20:34, Bertho Stultiens wrote:
>> But, I should not hijack the thread with information theory...
> In theory Modbus should be better, but I don't have any information
> about the VFD interface.
>
> That's the
On 02/08/2016 12:54 PM, andy pugh wrote:
> On 8 February 2016 at 20:34, Bertho Stultiens wrote:
>> But, I should not hijack the thread with information theory...
>
> In theory Modbus should be better, but I don't have any information
> about the VFD interface.
>
> That's the
On 8 Feb 2016, at 12:49, Peter Blodow wrote:
> In other words, you pretend to cut a left-hand thread but have the
> machine run in reverse so it turns out right hand?
> Peter Blodow
>
Yes; kind of I prefer to think of it as cutting a right hand thread upside
down (or is that inside out?).
I am tempted to attempt to control the lathe VFD with Modbus.
I have one of these:
http://www.ebay.com/itm/CH340-USB-to-RS485-485-Converter-Adapter-Module-For-Win7-Linux-XP-Vista-/201258967189?hash=item2edbf82095:g:SDAAAOSw2s1UrPYd
I need to connect to 8P8C connector on the VFD which has pins
1
yea it's a bit short on pins
i use these
http://www.ebay.co.uk/itm/Useful-80mm-USB-2-0-to-RS-485-RS-422-Serial-Converter-Adapter-Cable-ST-/151912461839
On 8 February 2016 at 13:16, andy pugh wrote:
> I am tempted to attempt to control the lathe VFD with Modbus.
>
> I have
On 2/8/2016 12:51 PM, andy pugh wrote:
> On 8 February 2016 at 17:40, Dave Cole wrote:
>> RS485 is two wire, half duplex.
>> I think you have a RS422 connection that can run full duplex.
>> I don't recognize the D and R pins??Perhaps Data Ready and Request
>> to Send
RS485 is two wire, half duplex.
I think you have a RS422 connection that can run full duplex.
I don't recognize the D and R pins??Perhaps Data Ready and Request
to Send ??
Those aren't normally required for RS422.
Dave
On 2/8/2016 8:16 AM, andy pugh wrote:
> I am tempted to attempt to
On 8 February 2016 at 17:40, Dave Cole wrote:
> RS485 is two wire, half duplex.
> I think you have a RS422 connection that can run full duplex.
> I don't recognize the D and R pins??Perhaps Data Ready and Request
> to Send ??
> Those aren't normally required for
On 8 February 2016 at 20:34, Bertho Stultiens wrote:
> But, I should not hijack the thread with information theory...
In theory Modbus should be better, but I don't have any information
about the VFD interface.
That's the version of information theory that matters to me
On 8 February 2016 at 21:04, Bertho Stultiens wrote:
> I thought that ModBus was pretty standardized:
So which register do I write to to set output frequency?
Which register do I read to monitor motor current?
(And, back to the original question, how do I wire the 8 pins
Bertho,
I agree with the sentiment that it is less than ideal to have something
that certainly has a local microprocessor that then creates an analog out
which you then read in. It's a lossy channel and subject to any number of
problems. That assumes you have the software skills and documentation
On Mon, 8 Feb 2016 11:23:23 -0800
Jerry Scharf wrote:
> Bertho,
>
> I agree with the sentiment that it is less than ideal to have something
> that certainly has a local microprocessor that then creates an analog out
> which you then read in. It's a lossy channel and subject
On 02/08/2016 09:01 PM, Nicklas Karlsson wrote:
>> I agree with the sentiment that it is less than ideal to have something
>> that certainly has a local microprocessor that then creates an analog out
>> which you then read in. It's a lossy channel and subject to any number of
>> problems. That
> On 02/08/2016 08:52 PM, Nicklas Karlsson wrote:
> >> Noise in analog will reduce the effective resolution, whereas noise in
> >> digital can be easily filtered and the resolution stays constant.
> >> Analog signals cannot be isolated easily and trying so results in
> >> awkward non-linearities
On 02/08/2016 09:54 PM, andy pugh wrote:
> On 8 February 2016 at 20:34, Bertho Stultiens wrote:
>> But, I should not hijack the thread with information theory...
> In theory Modbus should be better, but I don't have any information
> about the VFD interface.
>
> That's the
On 02/08/2016 09:12 PM, Peter C. Wallace wrote:
>> The number of bits required goes to the root of Shannon's information
>> theory. We see how effective it is in our daily life everywhere and it
>> is better than analog.
>>
>> Telephony has been digitalized completely today. Television has
>>
On 02/08/2016 10:12 PM, andy pugh wrote:
>> I thought that ModBus was pretty standardized:
> So which register do I write to to set output frequency?
Do you have the original documentation of the VFD? I guess not.
Do you have any "old" VFD control or test software, If you have, you can
reverse
On Monday 08 February 2016 11:23:58 andy pugh wrote:
> On 8 February 2016 at 16:12, Gene Heskett wrote:
> > One question remains: Does the thread even have to have a spiral
> > component, eg does it need to actually advance into the hole as it
> > turns? Common sense says it
> On 8 February 2016 at 17:40, Dave Cole wrote:
> > RS485 is two wire, half duplex.
> > I think you have a RS422 connection that can run full duplex.
> > I don't recognize the D and R pins??Perhaps Data Ready and Request
> > to Send ??
> > Those aren't normally
On 02/08/2016 11:14 AM, Gene Heskett wrote:
> On Monday 08 February 2016 11:23:58 andy pugh wrote:
>
>> On 8 February 2016 at 16:12, Gene Heskett wrote:
>>> One question remains: Does the thread even have to have a spiral
>>> component, eg does it need to actually advance into
> >> Screwed breeches of the Welin or de Bange type are only used with
> >> bagged charge guns. They both use a de Bange obturator for sealing
> >> whereas a brass-case gun used the case for obturation.
> >> This might mean they need no lead, but the pictures seem to indicate
> >> one.
>
> Krupp
On 02/08/2016 01:56 PM, Nicklas Karlsson wrote:
Screwed breeches of the Welin or de Bange type are only used with
bagged charge guns. They both use a de Bange obturator for sealing
whereas a brass-case gun used the case for obturation.
This might mean they need no lead, but the
On 02/08/2016 07:01 PM, Dave Cole wrote:
>>> RS485 is two wire, half duplex.
>>> I think you have a RS422 connection that can run full duplex.
>>> I don't recognize the D and R pins??Perhaps Data Ready and Request
>>> to Send ??
>>> Those aren't normally required for RS422.
>> I am becoming
On 02/08/2016 08:52 PM, Nicklas Karlsson wrote:
>> Noise in analog will reduce the effective resolution, whereas noise in
>> digital can be easily filtered and the resolution stays constant.
>> Analog signals cannot be isolated easily and trying so results in
>> awkward non-linearities that need
On 02/08/2016 08:23 PM, Jerry Scharf wrote:
> I agree with the sentiment that it is less than ideal to have something
> that certainly has a local microprocessor that then creates an analog out
> which you then read in. It's a lossy channel and subject to any number of
> problems. That assumes you
On Mon, 8 Feb 2016, Bertho Stultiens wrote:
> Date: Mon, 8 Feb 2016 21:03:44 +0100
> From: Bertho Stultiens
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: "Enhanced Machine Controller (EMC)"
>
> On 02/08/2016 07:01 PM, Dave Cole wrote:
> >>> RS485 is two wire, half duplex.
> >>> I think you have a RS422 connection that can run full duplex.
> >>> I don't recognize the D and R pins??Perhaps Data Ready and Request
> >>> to Send ??
> >>> Those aren't normally required for RS422.
> >> I
On 8 February 2016 at 21:42, Bertho Stultiens wrote:
> Try and try again, or get a hold of the documentation. ;-)
The documentation is silent on the subject:
On 8 February 2016 at 22:20, Bertho Stultiens wrote:
> My best guess is that they have mapped the entire register space from
> the front-panel config (page 4-9 and forward), as documented, to the
> communications register map. That should be possible to test with a few
>
On 02/08/2016 11:03 PM, andy pugh wrote:
>> Try and try again, or get a hold of the documentation. ;-)
>
> The documentation is silent on the subject:
> http://www.lovatoelectric.com/Single-phase-supply-200-240VAC-50-60Hz-EMC-suppressor-built-in-PNP-24VDC-programmable-inputs/150005010/spd
On 8 February 2016 at 23:10, Bertho Stultiens wrote:
>> I thought of that, but they only document writable parameters. None of
>> them look like a likely place to read currents or voltages.
>
> Often you have r/w registers, where you read a measured value and write
> a
On 8 February 2016 at 23:10, Bertho Stultiens wrote:
> I'd start with writing the manufacturer for the right docs.
I tried.
http://www.lovatoelectric.co.uk/Information-request/cnt
Appears to have a "Send" button that doesn't do anything.
--
atp
If you can't fix it, you
On 02/08/2016 11:56 PM, andy pugh wrote:
>> My best guess is that they have mapped the entire register space from
>> the front-panel config (page 4-9 and forward), as documented, to the
>> communications register map. That should be possible to test with a few
>> read commands.
>
> I thought of
Andy,
This isn't the worst thing I've seen. Rs485 is a two wire differential half
duplex signalling system. The doc says that it can run up to 38.4kbps.
So you one 1 wire to the plus of the master and the vfd and the other wire
to the minus. It will run on anything twisted that is better than
On 2/8/2016 1:03 PM, Bertho Stultiens wrote:
> Telephony has been digitalized completely today. Television has
> transitioned from analog to digital, freeing more than 50% of the
> bandwidth, while increasing the number of channels. Radio will follow
> (currently running parallel).
There have
On Monday 08 February 2016 14:21:35 Ed wrote:
> Rifled Breech Loader
Thanks Ed. Educational reading to be sure.
Cheers, Gene Heskett
--
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soap, ballot, jury, and ammo. Please use in that order."
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