Re: [Emc-users] Any idea how they machine these?

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

Re: [Emc-users] Any idea how they machine these?

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

Re: [Emc-users] Any idea how they machine these?

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

Re: [Emc-users] Any idea how they machine these?

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

Re: [Emc-users] Any idea how they machine these?

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

Re: [Emc-users] Any idea how they machine these?

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

Re: [Emc-users] Any idea how they machine these?

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 >>

Re: [Emc-users] Any idea how they machine these?

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

[Emc-users] Using the camview gcode, no usage docs in sight.

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

Re: [Emc-users] Eagle mill retro fit

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.

[Emc-users] LinuxCNC 2.7.4 is released

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

Re: [Emc-users] Modbus wiring

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

Re: [Emc-users] Modbus wiring

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 ...

Re: [Emc-users] Modbus wiring

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

Re: [Emc-users] Modbus wiring

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

Re: [Emc-users] Any idea how they machine these?

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?).

[Emc-users] Modbus wiring

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

Re: [Emc-users] Modbus wiring

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

Re: [Emc-users] Modbus wiring

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

Re: [Emc-users] Modbus wiring

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

Re: [Emc-users] Modbus wiring

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

Re: [Emc-users] Modbus wiring

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

Re: [Emc-users] Modbus wiring

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

Re: [Emc-users] Modbus wiring

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

Re: [Emc-users] Modbus wiring

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

Re: [Emc-users] Modbus wiring

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

Re: [Emc-users] Modbus wiring

> 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

Re: [Emc-users] Modbus wiring

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

Re: [Emc-users] Modbus wiring

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 >>

Re: [Emc-users] Modbus wiring

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

Re: [Emc-users] Any idea how they machine these?

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

Re: [Emc-users] Modbus wiring

> 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

Re: [Emc-users] Any idea how they machine these?

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

Re: [Emc-users] Any idea how they machine these? (Cannon, techical not for problem with neighbours)

> >> 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

Re: [Emc-users] Any idea how they machine these? (Cannon, techical not for problem with neighbours)

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

Re: [Emc-users] Modbus wiring

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

Re: [Emc-users] Modbus wiring

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

Re: [Emc-users] Modbus wiring

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

Re: [Emc-users] Modbus wiring

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)" >

Re: [Emc-users] Modbus wiring

> 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

Re: [Emc-users] Modbus wiring

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:

Re: [Emc-users] Modbus wiring

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 >

Re: [Emc-users] Modbus wiring

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

Re: [Emc-users] Modbus wiring

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

Re: [Emc-users] Modbus wiring

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

Re: [Emc-users] Modbus wiring

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

Re: [Emc-users] Modbus wiring

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

Re: [Emc-users] Modbus wiring

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

Re: [Emc-users] Any idea how they machine these?

On Monday 08 February 2016 14:21:35 Ed wrote: > Rifled Breech Loader Thanks Ed. Educational reading to be sure. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page