Re: [Emc-users] Velocity closed loop + Position losed loop on an axis

Sounds good. On Fri, 27 Mar 2015 20:54:31 + andy pugh wrote: > On 27 March 2015 at 20:44, Karlsson & Wang > wrote: > > It is possible, i can't see it anymore. > > As I understand it, the encoder edges are timestamped by either the > system clock or a high-res counter in the FPGA, so at an

Re: [Emc-users] Velocity closed loop + Position losed loop on an axis

On 03/27/2015 11:04 AM, Les Newell wrote: > Hi Peter, > > That is a good way to estimate speed. I'm not sure how well it would > have worked in my application because it may be many servo periods > between counts. > > That's the whole idea of the velocity estimation, it allows smooth velocity chan

Re: [Emc-users] Possible New Lathe

On 3/27/2015 10:44 AM, Gene Heskett wrote: > > > On Friday 27 March 2015 11:08:18 Bruce Layne wrote: >> I'm looking forward to seeing your newly converted CNC lathe. I'd >> name her Natasha. > > FWIW, I'd like to see the conversion process in pictures myself. > I can see it now, a polished brass

[Emc-users] Anyone have leftovers from a 9x20 CNC conversion?

I've an idea for a project involving a pair of 9x20 9-speed quickchange gearboxes mounted side by side, with a filler between and three gears to couple the output of one to the input of the second. I'll have the gearbox off my $50 9x20 but need another. 9 speeds on one box feeding a second box

Re: [Emc-users] Possible New Lathe

On 3/27/2015 9:08 AM, Bruce Layne wrote: > In communist Russia, lathe turns YOU on! > > I'm looking forward to seeing your newly converted CNC lathe. I'd name > her Natasha. But then what is Boris? --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com

Re: [Emc-users] Tsudakoma TRNC-201S on a bridgeport Interact Series II? Crazy?

On 3/27/2015 6:41 AM, Igor Chudov wrote: > Andy, this BP has a 30 taper spindle. It is actually quite big. > > I put a servo motor (really a DC motor with encoder that I added) on the > knee, so the knee goes up and down easily, it is called "W" axis and it is > very handy. The vertical envelope of

Re: [Emc-users] Converting straight lines to arcs?

On 28 March 2015 at 00:13, Gregg Eshelman wrote: > Will it allow saving/exporting the modified G-code file? It looks like that is _all_ it allows. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -

Re: [Emc-users] Converting straight lines to arcs?

On 3/27/2015 2:18 PM, Sven Wesley wrote: > We've had this discussion within MadCAM users, the guys running older > machines (non converted or with old drivers) loses speed and sometimes the > G-code comes out too big for the machine memory. So there's a need for it, > > Frank Tkalcevic, that's the

Re: [Emc-users] Velocity closed loop + Position losed loop on an axis

2015-03-26 13:55 GMT-03:00 Jon Elson : > I make some "dumb" PWM-controlled servo amps. The PWM duty > cycle is converted to voltage output, not a current (as in a > torque-mode amp) or true velocity (there's no velocity or > current feedback). So, LinuxCNC's PID module is the only > thing betwee

Re: [Emc-users] Velocity closed loop + Position losed loop on an axis

2015-03-26 13:55 GMT-03:00 Jon Elson : > No, I don't think we are talking exactly about the same > thing. Common velocity servo amplifiers have an analog > velocity error amp, which takes in a velocity command from > the CNC control and a measured velocity, usually from a DC > tachometer mounted o

[Emc-users] Updates on PLM2000

I've found that the DOS software for the PLM2000 will run under XP and XP allows it to communicate with the mill, that should make it easier to find a program to log all the two way communications over the serial port. Any suggestions for a program that can do that? Is there a test NC file I ca

Re: [Emc-users] LinuxCNC controlling VFDs in servo mode

I don't know if it was Jon Elson or Dave Cole who was intrigued by the machine haha. Well anyway I think both are going to enjoy it! 2015-03-27 20:53 GMT-03:00 Leonardo Marsaglia : > Hello to all! > > First of all, a big thank you because without all the people involved > (developers and users)

[Emc-users] LinuxCNC controlling VFDs in servo mode

Hello to all! First of all, a big thank you because without all the people involved (developers and users) we wouldn't be able to make things like this. As some of you know we've been working on an induction heating machine for camshafts and today I can show you a lot of progress. This goes speci

Re: [Emc-users] Possible New Lathe

Andy, the machine resembles my Graziano SAG12 in some features. Russians are known for copying practical things from elsewhere and especially for producing machines that can be repaired in any place of the world by simple means. How is the gear shift accomplished, mechanical or by electric clut

Re: [Emc-users] Possible New Lathe

2015-03-28 0:22 GMT+02:00 andy pugh : > > CCL goes for Chinese CNC Lathe, or I've missed something? ) > > Cheap Chinese Lathe :-) > Oh, I was close! That's a shame. I would have thought that they were actually in quite > a good position to compete in the world markeplace. (They had the > tooling

Re: [Emc-users] Possible New Lathe

On 27 March 2015 at 22:10, Andrew wrote: > CCL goes for Chinese CNC Lathe, or I've missed something? ) Cheap Chinese Lathe :-) >> Maybe I can do a tour of Communist lathe producers :-) > I guess there are very few of them remain. > Specifically, the factory that produced this lathe was declare

Re: [Emc-users] Possible New Lathe

2015-03-27 23:47 GMT+02:00 andy pugh https://mail.google.com/mail/u/0/?view=cm&fs=1&tf=1&to=bodge...@gmail.com>> : > Well, I put in a £1000 offer for the lathe, Reasonable offer. > as it isn't quite right > for me as far as timing goes (as in, the CCL is still in the space the > CCCP lathe cou

Re: [Emc-users] Smart little device for zeroing

On Friday 27 March 2015 17:42:14 andy pugh wrote: > On 27 March 2015 at 21:35, Scott Salrin wrote: > > I just need to find a way to make it work in linuxcnc. > > It isn't magic. And you won't need any C. Yeah, if I can write the code to do that so can he. I do it in pieces, like I think theres a

Re: [Emc-users] Smart little device for zeroing

>It isn't magic. And you won't need any C. I was hoping someone would say that. Thanks Andy. On Fri, Mar 27, 2015 at 4:42 PM, andy pugh wrote: > On 27 March 2015 at 21:35, Scott Salrin wrote: > > I just need to find a way to make it work in linuxcnc. > > It isn't magic. And you won't need any

Re: [Emc-users] Possible New Lathe

Well, I put in a £1000 offer for the lathe, as it isn't quite right for me as far as timing goes (as in, the CCL is still in the space the CCCP lathe could be ) Maybe I can do a tour of Communist lathe producers :-) -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -

Re: [Emc-users] Smart little device for zeroing

On 27 March 2015 at 21:35, Scott Salrin wrote: > I just need to find a way to make it work in linuxcnc. It isn't magic. And you won't need any C. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -

Re: [Emc-users] Possible New Lathe

2015-03-27 22:01 GMT+02:00 andy pugh https://mail.google.com/mail/u/0/?view=cm&fs=1&tf=1&to=bodge...@gmail.com>> : > On 27 March 2015 at 18:23, Andrew > > wrote: > > You can look through this topic for more details (at least

Re: [Emc-users] Smart little device for zeroing

Yeah... I haven't even received my machine yet and I want the maker's guide. I just need to find a way to make it work in linuxcnc. On Fri, Mar 27, 2015 at 3:03 PM, Sven Wesley wrote: > https://www.youtube.com/watch?v=jZLW7knSICk > > --

Re: [Emc-users] Velocity closed loop + Position losed loop on an axis

On 27 March 2015 at 20:44, Karlsson & Wang wrote: > It is possible, i can't see it anymore. As I understand it, the encoder edges are timestamped by either the system clock or a high-res counter in the FPGA, so at any point the calculation is based on the total number of edges seen and the actual

Re: [Emc-users] Velocity closed loop + Position losed loop on an axis

It is possible, i can't see it anymore. On Thu, 26 Mar 2015 21:46:27 + andy pugh wrote: > On 26 March 2015 at 21:10, Karlsson & Wang > wrote: > > Quite many pulses need to be counted and servo thread is run quite often. > > For eight bit resolution which is rather low 256 pulses must be c

Re: [Emc-users] Converting straight lines to arcs?

We've had this discussion within MadCAM users, the guys running older machines (non converted or with old drivers) loses speed and sometimes the G-code comes out too big for the machine memory. So there's a need for it, Frank Tkalcevic, that's the guy who made the g1ToG23 script. Really clever lit

Re: [Emc-users] Possible New Lathe

On Friday 27 March 2015 14:36:43 andy pugh wrote: > On 27 March 2015 at 18:23, Andrew wrote: > > There's a latter CNC variant of this lathe. Just ready for CNC > > retrofitting. Same guys doing it (still in the process) > > https://www.flickr.com/photos/77436964@N02/15709534684/ > > Yes, one of

[Emc-users] Smart little device for zeroing

https://www.youtube.com/watch?v=jZLW7knSICk -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel so

Re: [Emc-users] Possible New Lathe

On 27 March 2015 at 18:23, Andrew wrote: > You can look through this topic for more details (at least photos) > http://www.cnc-club.ru/forum/viewtopic.php?f=3&t=3566 If these are a popular retrofit candidate in points East of here, I am wondering if there might be people willing to amortise the c

Re: [Emc-users] Possible New Lathe

2015-03-27 20:36 GMT+02:00 andy pugh https://mail.google.com/mail/u/0/?view=cm&fs=1&tf=1&to=bodge...@gmail.com>> : > On 27 March 2015 at 18:23, Andrew > > wrote: > > There's a latter CNC variant of this lathe. Just ready for

Re: [Emc-users] Possible New Lathe

That is one of the sexiest things I have ever seen! LOL What kinda lathe is that? Pete On Fri, Mar 27, 2015 at 2:36 PM, andy pugh wrote: > On 27 March 2015 at 18:23, Andrew wrote: > > There's a latter CNC variant of this lathe. Just ready for CNC > retrofitting. > > Same guys doing it (s

Re: [Emc-users] Possible New Lathe

On 27 March 2015 at 18:23, Andrew wrote: > There's a latter CNC variant of this lathe. Just ready for CNC retrofitting. > Same guys doing it (still in the process) > https://www.flickr.com/photos/77436964@N02/15709534684/ Yes, one of those would be rather ideal. Fascinating to see the base-casti

Re: [Emc-users] Possible New Lathe

2015-03-27 16:27 GMT+02:00 andy pugh : > I have long been disatisfied with my CNC-converted Chinese lathe. > It is a cheap copy of the Emco Compact 8 (not a paragon of over-built > perfection) stretched to 9" centre height and 1000mm bed length. Then > a milling machine was bolted to the back to r

Re: [Emc-users] Possible New Lathe

On 03/27/2015 10:40 AM, John Thornton wrote: > Did you finish this project? > > JT > > On 3/27/2015 12:16 PM, Kirk Wallace wrote: >> http://www.wallacecompany.com/cnc_lathe/ I haven't wanted to rush this project, so it has been pretty much as seen on the website for the last nine years. I put the

Re: [Emc-users] Possible New Lathe

2015-03-27 19:56 GMT+02:00 andy pugh : > The slides are relatively huge compared to the CCL, and the saddle is > at least 3 x wider too Bastards made good machines for export, but sold crap for domestic use... Viesturs -

Re: [Emc-users] Possible New Lathe

On 27 March 2015 at 17:49, Viesturs Lācis wrote: > One thing to pay attention to is > the width of the slide surfaces on slides - russians made them pretty > narrow, so the contact area is smaller and it wears out quicker The slides are relatively huge compared to the CCL, and the saddle is at le

Re: [Emc-users] Possible New Lathe

On 27 March 2015 at 16:49, Gene Heskett wrote: >> Though this would mean removing the preselector gearbox. Which would >> be slightly sad. > > Do you mean the headstock backgear selector? No. The angled dial at knee-level allows you to select a gear when the spindle is running, but it doesn't act

Re: [Emc-users] Possible New Lathe

2015-03-27 16:47 GMT+02:00 andy pugh : >> http://www.ebay.co.uk/itm/Centre-lathe-made-by-Stankoimport-Russian-built-/191526503823 > > I forgot to ask the question... > > Does anyone have any experience of these or other Russian lathes? Well, in my part of world western-made machine tools are consi

Re: [Emc-users] Possible New Lathe

Did you finish this project? JT On 3/27/2015 12:16 PM, Kirk Wallace wrote: > http://www.wallacecompany.com/cnc_lathe/ -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and devel

Re: [Emc-users] Possible New Lathe

On 27 March 2015 at 17:16, Kirk Wallace wrote: > The plan is to place the Z axis motor and pulleys where the threading > gearbox was (yellow area at the end of the leadscrew): > http://www.wallacecompany.com/cnc_lathe/1-1a.jpg If you would like the opportunity to learn from my mistakes... Co

Re: [Emc-users] Possible New Lathe

On 03/27/2015 09:49 AM, Gene Heskett wrote: > > > On Friday 27 March 2015 11:59:52 andy pugh wrote: >> On 27 March 2015 at 14:27, andy pugh wrote: >>> 2-speed geared head + something in the base which can be replaced by >>> a VFD (possibly). >> >> Though this would mean removing the preselector ge

Re: [Emc-users] Possible New Lathe

On Friday 27 March 2015 11:59:52 andy pugh wrote: > On 27 March 2015 at 14:27, andy pugh wrote: > > 2-speed geared head + something in the base which can be replaced by > > a VFD (possibly). > > Though this would mean removing the preselector gearbox. Which would > be slightly sad. Do you mean

Re: [Emc-users] Possible New Lathe

On Friday 27 March 2015 11:08:18 Bruce Layne wrote: > I was thinking of getting a new Grizzly G0602 lathe and converting it > to CNC, but a friend talked me into getting an old Clausing lathe as > the basis for my CNC conversion instead. For about the same money, I > got a much more solid lathe.

Re: [Emc-users] Possible New Lathe

On 27 March 2015 at 16:34, Gene Heskett wrote: > That to me wouldn't be a huge concern, making parts that are generally > made of pure unobtainium is supposed to be our specialty. Both my mill > and my lathe have made on the premises parts in them. > >> > And there is probably no >> > ready marke

Re: [Emc-users] Possible New Lathe

On Friday 27 March 2015 10:59:10 Marcus Bowman wrote: > On 27 Mar 2015, at 14:27, andy pugh wrote: > > I have long been disatisfied with my CNC-converted Chinese lathe. > > It is a cheap copy of the Emco Compact 8 (not a paragon of > > over-built perfection) stretched to 9" centre height and 1000

Re: [Emc-users] Velocity closed loop + Position losed loop on an axis

Nice. Unfortunately this particular job is cost sensitive so I'm currently doing everything in a PIC. Les On 27/03/2015 16:11, Peter C. Wallace wrote: > Not sure about the other ones but the Mesa driver has a settable > timeout for velocity estimation (settable in seconds) before giving up > a

Re: [Emc-users] Velocity closed loop + Position losed loop on an axis

On Fri, 27 Mar 2015, Les Newell wrote: > Date: Fri, 27 Mar 2015 16:04:37 + > From: Les Newell > Reply-To: "Enhanced Machine Controller (EMC)" > > To: "Enhanced Machine Controller (EMC)" > Subject: Re: [Emc-users] Velocity closed loop + Position losed loop on an axis > > Hi Peter, > > T

Re: [Emc-users] Tsudakoma TRNC-201S on a bridgeport Interact Series II? Crazy?

On 03/26/2015 10:10 PM, Igor Chudov wrote: > I came into possession of a Tsudakoma TRNC-201S table. It is incomplete and > missing the servos, but it may be actually a plus as I can install more > EMC2-friendly servos. > > It looks just like its bigger brother ...-301S, but is smaller. See ebay > i

Re: [Emc-users] Velocity closed loop + Position losed loop on an axis

Hi Peter, That is a good way to estimate speed. I'm not sure how well it would have worked in my application because it may be many servo periods between counts. Les On 26/03/2015 20:23, Peter C. Wallace wrote: > The LinuxCNC software encoder counter and at least the Mesa and Pico Systems > ha

Re: [Emc-users] Possible New Lathe

On my Samson lathe I leave the 4 jaw in all the time, when I want to do work with the 5C collets I put a collet closer in the 4 jaw. I find I can center a part in a few seconds with my tool post mounted indicator. I use a collet closer like this one: http://www.warco.co.uk/259-484-large/5c-preci

Re: [Emc-users] Possible New Lathe

On 27 March 2015 at 14:27, andy pugh wrote: > 2-speed geared head + something in the base which can be replaced by a > VFD (possibly). Though this would mean removing the preselector gearbox. Which would be slightly sad. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manife

Re: [Emc-users] Possible New Lathe

Looks like a nice casting to start a project from. I had rear nuts on the Hobbymat MD65, utter pain. Other thing to think about collets and taper, I usually use cheap morse taper collets but that often gives problems for long stuff. The good side was selling off the junk parts I no longer wanted

Re: [Emc-users] Possible New Lathe

My Emco Compact-8s have the 3 M8 nuts to hold chucks on to the flange - it does not have the rotating collar. I find it fine - I don't change chucks that often (like, the ER-25 collet adapter has been on there for a year). Changing is pretty quick, but there is an art to getting the nuts threaded

Re: [Emc-users] Possible New Lathe

If you're planning to convert it to cnc - The only thing you really have to worry about for parts are the spindle bearings/gearbox.. (if you can live with the chuck mounting design) I have seen what you can fabricate in your shop... I really don't think you have to worry about anything.. sam

Re: [Emc-users] Possible New Lathe

Hello Andy, This is a pretty decent lathe, I'll find you some info tonight. 27 бер. 2015 16:28, користувач "andy pugh" написав: > I have long been disatisfied with my CNC-converted Chinese lathe. > It is a cheap copy of the Emco Compact 8 (not a paragon of over-built > perfection) stretched to 9"

Re: [Emc-users] Possible New Lathe

I was thinking of getting a new Grizzly G0602 lathe and converting it to CNC, but a friend talked me into getting an old Clausing lathe as the basis for my CNC conversion instead. For about the same money, I got a much more solid lathe. It was good advice. The lathe you're considering looks v

Re: [Emc-users] Possible New Lathe

On 27 Mar 2015, at 14:27, andy pugh wrote: > I have long been disatisfied with my CNC-converted Chinese lathe. > It is a cheap copy of the Emco Compact 8 (not a paragon of over-built > perfection) stretched to 9" centre height and 1000mm bed length. Then > a milling machine was bolted to the back

Re: [Emc-users] Possible New Lathe

On 27 March 2015 at 14:27, andy pugh wrote: > http://www.ebay.co.uk/itm/Centre-lathe-made-by-Stankoimport-Russian-built-/191526503823 I forgot to ask the question... Does anyone have any experience of these or other Russian lathes? -- atp If you can't fix it, you don't own it. http://www.ifix

[Emc-users] Possible New Lathe

I have long been disatisfied with my CNC-converted Chinese lathe. It is a cheap copy of the Emco Compact 8 (not a paragon of over-built perfection) stretched to 9" centre height and 1000mm bed length. Then a milling machine was bolted to the back to really highlight the fact that the saddle isn't h

Re: [Emc-users] Tsudakoma TRNC-201S on a bridgeport Interact Series II? Crazy?

Andy, this BP has a 30 taper spindle. It is actually quite big. I put a servo motor (really a DC motor with encoder that I added) on the knee, so the knee goes up and down easily, it is called "W" axis and it is very handy. The vertical envelope of this milling machine is quite big. This machine

Re: [Emc-users] Tsudakoma TRNC-201S on a bridgeport Interact Series II? Crazy?

On 27 March 2015 at 12:19, Igor Chudov wrote: > While this 4th and 5th axis table is not as big as usual, it still might be > too big to fit on my table, but it is close. Does the BP have an R8 spindle? You might find it hard to get tools out with the table mounted. I would try it in place first

Re: [Emc-users] Tsudakoma TRNC-201S on a bridgeport Interact Series II? Crazy?

Andy, thanks. While this 4th and 5th axis table is not as big as usual, it still might be too big to fit on my table, but it is close. Weight-wise, it is OK. So far, I have been G-coding everything by hand, my jobs are simple. I am not a job shop and do not make stuff for a living. I wrote a numb

Re: [Emc-users] Tsudakoma TRNC-201S on a bridgeport Interact Series II? Crazy?

On 27 March 2015 at 03:10, Igor Chudov wrote: > My question is, can I use this table as 4th and 5th axis, software-wise? Yes, if it will fit on the machine and the table can lift the weight then LinuxCNC can handle the software and control. You might need to think about how you want to control i