Re: [Emc-users] 3D Printer Mods?

2012/5/29 Jeshua Lacock : > > Is it possible to make those changes to LinuxCNC? > I would say - if Mach can do this, then LinuxCNC can do it much better :) > > In other words, can LinuxCNC currently command a serial port using those > additional M words? > Classicladder module will provide Modb

[Emc-users] 3D Printer Mods?

Greetings all, I have been dreaming of making a removable plastic extruder nozzle for my machine. It would turn it into a *huge* 3D printer. So I read this page with great interest: http://www.thingiverse.com/thing:5233 Is it possible to make those changes to LinuxCNC? In other words, can Lin

Re: [Emc-users] Commutating Reactor

gene heskett wrote: > On Monday, May 28, 2012 01:43:30 PM Jon Elson did opine: > > >> >> First, you should forget the mains neutral. This terminal has no >> meaning for the generated >> 3-phase system, and just causes confusion. If the motor has a center >> tap, you can use >> that as the refe

Re: [Emc-users] Commutating Reactor

Yes, many/most big servo drive systems that I have worked on use a Delta primary - Wye secondary with a grounded neutral. I think the grounded neutral on the Wye keeps the voltage in check on the drive capacitors from a line to ground standpoint. I've purchased this type of transformer for a c

[Emc-users] resolved: 'MDI losing queue buffer'

the underlying issue is now fixed in master for Axis devs - please see emc-developers - Michael -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape ha

Re: [Emc-users] Working on my lathe again

On 28 May 2012 23:33, gene heskett wrote: > front v-way rising a thou or so to allow this twist before > the flat slide at the rear of the carriage starts moving when the direction > is reversed.  My thoughts are to add a couple small ball bearings, spring > loaded against the bottom lip of the V

[Emc-users] Working on my lathe again

Greetings all; I did some more fine tuning of the drivers, making changes in the drivers stepper divider because the scale value was over 50k, so I changed it from 1600/step/rev to 1000, which drops the scale value to 32000 even. Because that motor is geared 2/1 to the 16tpi carriage leadscrew

Re: [Emc-users] Question with gantry setup

On 28 May 2012 22:08, Peter C. Wallace wrote: > Probably a C10 config is no big deal I would just need to know when inputs and > outputs are, and if there is a chargepump, preferred step/dir pins etc It looks to be an "uncommitted" breakout, so the physical wires could be arranged to suit the fi

Re: [Emc-users] Question with gantry setup

On Mon, 28 May 2012, andy pugh wrote: > Date: Mon, 28 May 2012 20:55:47 +0100 > From: andy pugh > Reply-To: "Enhanced Machine Controller (EMC)" > > To: "Enhanced Machine Controller (EMC)" > Subject: Re: [Emc-users] Question with gantry setup snip-

Re: [Emc-users] Question with gantry setup

2012/5/28 Bryce Johnson : > I've just been trying to tune my gantry setup and I have had a few > problems.  I am using 2.5. > > I am using gantrykins with XYZX.  I am trying to set up my limits for for > speed on my Z axis of 180ipm.   In joint mode, jogging around, it seems to > obey this.   When

Re: [Emc-users] Question with gantry setup

On 28 May 2012 20:34, Bryce Johnson wrote: > It seems like I lose some flexibility when using gantrykins vs just slaving > the drives together (although I would like to be able to home both X1 and > X2 independently).  Is there a way to home the drives and then run it as if > they were slaved? N

[Emc-users] Question with gantry setup

I've just been trying to tune my gantry setup and I have had a few problems. I am using 2.5. I am using gantrykins with XYZX. I am trying to set up my limits for for speed on my Z axis of 180ipm. In joint mode, jogging around, it seems to obey this. When I switch to world it doesn't listen t

Re: [Emc-users] Encoder Interference

On Monday, May 28, 2012 01:45:40 PM Jon Elson did opine: > gene heskett wrote: > > But there are still plenty of the older TTL stuffs gathering dust on > > the shelves at Newark et all. The advantage of CMOS is to me, the > > much larger noise immunity. Running on 5 volt rails, noise has to be >

Re: [Emc-users] Commutating Reactor

John Thornton wrote: > At least I know what an autotransformer is now after following your > links... and a little google work. > > But, you definitely do NOT want to use an autotransformer in this case, as you will be shifting the ground reference of the whole system. The phase converter prod

Re: [Emc-users] Commutating Reactor

On Monday, May 28, 2012 01:43:30 PM Jon Elson did opine: > Dave Caroline wrote: > > I think most people looking at idler rotary converters dont actually > > scope the phases > > I only came across one site stating the obvious > > > > given the basic diagram of > > > > 120 ac to motor P1 and out

Re: [Emc-users] Encoder Interference

On Monday, May 28, 2012 01:40:36 PM Jon Elson did opine: > Jeshua Lacock wrote: > > And encoder noise it was indeed. > > > > I just realized my motor wasn't grounded (you know that big hunk of > > metal with electricity surging through it intimately connected to the > > encoder in question). > >

Re: [Emc-users] Commutating Reactor

John Thornton wrote: > I've been searching for "isolation transformer" but they all seem to be > 480 to 240 or similar. Not had any luck so far on finding a 240-240 > transformer. > Many dry transformers that do 480 - 240 can be restrapped for 240 -240. Also, voltage adjusting transformers ca

Re: [Emc-users] Commutating Reactor

andy pugh wrote: > On 28 May 2012 09:39, gene heskett wrote: > > >> True, they just wind 3 sets of coils on a 3 legged core. My suggested use >> was to convert the delta connected source with its 'wild leg' into a wye >> connected source that doesn't have the wild leg because the center of the

Re: [Emc-users] Encoder Interference

gene heskett wrote: > > But there are still plenty of the older TTL stuffs gathering dust on the > shelves at Newark et all. The advantage of CMOS is to me, the much larger > noise immunity. Running on 5 volt rails, noise has to be nearly half that > 5 volts in order to even get into the activ

Re: [Emc-users] Commutating Reactor

Dave Caroline wrote: > I think most people looking at idler rotary converters dont actually > scope the phases > I only came across one site stating the obvious > > given the basic diagram of > > 120 ac to motor P1 and output phase L1 > neutral--nc > 120 ac to motor P3 and output phase L3 > Capa

Re: [Emc-users] Encoder Interference

Jeshua Lacock wrote: > And encoder noise it was indeed. > > I just realized my motor wasn't grounded (you know that big hunk of metal > with electricity surging through it intimately connected to the encoder in > question). > Geez, after sending the last message, I really thought I should hav

[Emc-users] featured today on Hack-a-day

very nice lathe restoration... http://hackaday.com/2012/05/28/turning-a-1942-lathe-into-a-functional-piece-of-art/ Thanks, DougM -- Live Security Virtual Conference Exclusive live event will cover all the ways today's s

Re: [Emc-users] Commutating Reactor

On Monday, May 28, 2012 12:38:53 PM andy pugh did opine: > On 28 May 2012 17:19, gene heskett wrote: > >> This one is definitely 1:1, but I am not at all clear what terminals > >> it has.. http://uk.rs-online.com/web/p/auto-transformers/4368861/ > > > > And both are auto transformers Andy, and w

Re: [Emc-users] Commutating Reactor

On Monday, May 28, 2012 12:20:24 PM Kirk Wallace did opine: > On Mon, 2012-05-28 at 08:43 +0100, Dave Caroline wrote: > > I think most people looking at idler rotary converters dont actually > > scope the phases > > I only came across one site stating the obvious > > > > given the basic diagram o

Re: [Emc-users] Commutating Reactor

On 28 May 2012 17:19, gene heskett wrote: >> This one is definitely 1:1, but I am not at all clear what terminals it >> has.. http://uk.rs-online.com/web/p/auto-transformers/4368861/ > > And both are auto transformers Andy, and will not fix this problem. Can you have a 1:1 Autotransformer? I ca

Re: [Emc-users] Commutating Reactor

On Monday, May 28, 2012 12:18:19 PM andy pugh did opine: > On 28 May 2012 13:26, John Thornton wrote: > > I've been searching for "isolation transformer" but they all seem to > > be 480 to 240 or similar. Not had any luck so far on finding a > > 240-240 transformer. > > I think this is close, bu

Re: [Emc-users] Commutating Reactor

On Monday, May 28, 2012 11:53:29 AM John Thornton did opine: > Gene, > > The phaseperfect install guide did mention that when you need balanced > voltage to ground to use a delta wye transformer after their device. So > I have to assume they are out there but so far my google only turns up > desc

Re: [Emc-users] Commutating Reactor

On Mon, 2012-05-28 at 08:43 +0100, Dave Caroline wrote: > I think most people looking at idler rotary converters dont actually > scope the phases > I only came across one site stating the obvious > > given the basic diagram of > > 120 ac to motor P1 and output phase L1 > neutral--nc > 120 ac t

Re: [Emc-users] Commutating Reactor

At least I know what an autotransformer is now after following your links... and a little google work. "An autotransformer is an electrical transformer with only one winding. The auto prefix refers to the single coil acting on itself rather than any automatic mechanism. In an autotransformer p

Re: [Emc-users] Commutating Reactor

On 28 May 2012 13:26, John Thornton wrote: > I've been searching for "isolation transformer" but they all seem to be > 480 to 240 or similar. Not had any luck so far on finding a 240-240 > transformer. I think this is close, but isn't exactly 1:1 http://docs-europe.electrocomponents.com/webdocs/1

Re: [Emc-users] rtos?

still a case of wtf. i'm used to (multi)syllabic words in just one almost foreign language. --- On Mon, 5/28/12, gene heskett wrote: > From: gene heskett > Subject: Re: [Emc-users] rtos? > To: emc-users@lists.sourceforge.net > Date: Monday, May 28, 2012, 3:05 AM > On Monday, May 28, 2012 06:

Re: [Emc-users] Commutating Reactor

I've been searching for "isolation transformer" but they all seem to be 480 to 240 or similar. Not had any luck so far on finding a 240-240 transformer. John On 5/28/2012 5:00 AM, gene heskett wrote: > On Monday, May 28, 2012 05:46:09 AM andy pugh did opine: > >> On 28 May 2012 09:39, gene hesk

Re: [Emc-users] Commutating Reactor

Gene, The phaseperfect install guide did mention that when you need balanced voltage to ground to use a delta wye transformer after their device. So I have to assume they are out there but so far my google only turns up descriptions of the beast. John On 5/27/2012 4:09 PM, gene heskett wrote:

Re: [Emc-users] TOT Bamboo Fly Rods

Ah, bummer. That one looked to be in pretty nice shape, and all the sections were the same length. My rods go for $1500, $1600 if hollow built. Hollow building is done by fluting each individual strip, so that the center of the rod, when glued up, looks sorta like a 6 leaf clover (of air). I

Re: [Emc-users] Spindle suggestions

On 23 May 2012 17:53, Erik Friesen wrote: > Really what I'd like is something with quick change tools, but not sure > where to look.  I'd like to keep it under $500, but probably wouldn't > happen with quick change. I am sure I have seen references to cheap ATC spindle motors from China, but the

Re: [Emc-users] rtos?

>to first order, i'd say there are too many acronyms to make the link useful. Thats part of the quality :) If I read this stuff right it grew out of a micro controller rtos and it is not quite mature yet. (Although *NuttX RTOS* is) It might perhaps become useful once a major migration to a headles

Re: [Emc-users] rtos?

On Monday, May 28, 2012 06:00:49 AM charles green did opine: > RGMP stands for RTOS and GPOS on Multi-Processor. ..ok, and GPOS is > ..generic platform operating system? to first order, i'd say there are > too many acronyms to make the link useful. > > WBEC? KWIM? > Sounds like radio call sign

Re: [Emc-users] Commutating Reactor

On Monday, May 28, 2012 05:46:09 AM andy pugh did opine: > On 28 May 2012 09:39, gene heskett wrote: > > True, they just wind 3 sets of coils on a 3 legged core. My suggested > > use was to convert the delta connected source with its 'wild leg' > > into a wye connected source that doesn't have t

Re: [Emc-users] rtos?

RGMP stands for RTOS and GPOS on Multi-Processor. ..ok, and GPOS is ..generic platform operating system? to first order, i'd say there are too many acronyms to make the link useful. WBEC? KWIM? --- On Mon, 5/28/12, gene heskett wrote: > From: gene heskett > Subject: [Emc-users] rtos? > To

Re: [Emc-users] Commutating Reactor

On 28 May 2012 09:39, gene heskett wrote: > True, they just wind 3 sets of coils on a 3 legged core.  My suggested use > was to convert the delta connected source with its 'wild leg' into a wye > connected source that doesn't have the wild leg because the center of the > wye is now connected to t

[Emc-users] rtos?

Greetings everybody; Is this link of any use to us? Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page:

Re: [Emc-users] Commutating Reactor

On Monday, May 28, 2012 04:12:48 AM Dave Caroline did opine: > I think most people looking at idler rotary converters dont actually > scope the phases > I only came across one site stating the obvious > > given the basic diagram of > > 120 ac to motor P1 and output phase L1 > neutral--nc > 120

Re: [Emc-users] Encoder Interference

On Monday, May 28, 2012 03:10:38 AM Jon Elson did opine: > gene heskett wrote: > > Jon, while the encoder I built for the lathe spindle was pretty crude, > > one of the things I did in my research was to make it an given that > > the opto device chosen had an active, high speed CMOS rail to rail >

Re: [Emc-users] Commutating Reactor

I think most people looking at idler rotary converters dont actually scope the phases I only came across one site stating the obvious given the basic diagram of 120 ac to motor P1 and output phase L1 neutral--nc 120 ac to motor P3 and output phase L3 Capacitor P1 to P2 and to output phase L2