Using a autotransformer with a 220V in with a 110v out should do the job. It is relatively small, and much cheaper than a fully isolated transformer. I bought one in a toroidal configuration, 500VA size, about USD$35.00. Had three voltage taps as well. I used it at 120V to get 60V AC for my setup. Remember that an autotransformer does not isolate the secondary
----- Original Message ----- From: [email protected] To: [email protected] Sent: Saturday, January 24, 2015 9:39:17 AM Subject: Emc-users Digest, Vol 105, Issue 40 Send Emc-users mailing list submissions to [email protected] To subscribe or unsubscribe via the World Wide Web, visit https://lists.sourceforge.net/lists/listinfo/emc-users or, via email, send a message with subject or body 'help' to [email protected] You can reach the person managing the list at [email protected] When replying, please edit your Subject line so it is more specific than "Re: Contents of Emc-users digest..." Today's Topics: 1. Re: Linux Program for Wiring Diagrams (Kirk Wallace) 2. Re: Linux Program for Wiring Diagrams (Mark Johnsen) 3. Re: Manual Mill Setup Question (Mark Johnsen) 4. DC Supply (Kirk Wallace) 5. Re: Linux Program for Wiring Diagrams (Jon Elson) 6. Re: 3x Servo-To-Go 4 axis isa cards for a bottle of wine, if anybody still needs them (Jon Elson) 7. Re: DC Supply (Peter C. Wallace) 8. Re: Stg documentation, opamp error on the servo-to-go stg card with switch mode dc dc converters in modern atx power supplies (Sebastian Kuzminsky) ---------------------------------------------------------------------- Message: 1 Date: Sat, 24 Jan 2015 07:38:00 -0800 From: Kirk Wallace <[email protected]> Subject: Re: [Emc-users] Linux Program for Wiring Diagrams To: [email protected] Message-ID: <[email protected]> Content-Type: text/plain; charset=ISO-8859-1; format=flowed On 01/23/2015 09:40 PM, Evan Foss wrote: > I use geda. > > http://www.geda-project.org/ > I use gEDA too. I tried Eagle, but the making of devices is just _too_ difficult compared to gEDA. Too bad Eagle has become the standard, much like Windows. I also use Inkscape for documenting system layouts. Making and labeling blocks is easy, but the connection routing at my skill level is just running lines, so there is no intelligence behind the connections. There is also a LinuxCNC extension to Inkscape for generating g-code: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?InkscapeHowto http://www.cnc-club.ru/forum/viewtopic.php?f=33&t=35&start=420 gEDA has an extension for HAL: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?HalSchematicsUsingGschem -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ ------------------------------ Message: 2 Date: Sat, 24 Jan 2015 07:55:23 -0800 From: Mark Johnsen <[email protected]> Subject: Re: [Emc-users] Linux Program for Wiring Diagrams To: [email protected] Message-ID: <caaae+a3pkxicewykd1ticd+pxbufjwgho-k9-skve8dm0uf...@mail.gmail.com> Content-Type: text/plain; charset=UTF-8 I'll throw DraftSight into the mix. Free download and available for Win, Mac, Fedora, and Ubuntu. I have no idea how it would work w/ Wheezy or other Linux flavors. http://www.3ds.com/products-services/draftsight-cad-software/free-download/ Draftsight is very AutoCAD looking... OT: I had heard that SpaceX had used Visio before they purchased a real electrical CAD program. And, I've heard others using Visio for electrical schematics. Only issue is that it will cost you and probably Win only. Lastly, someone already recommended KiCAD, the guys at Sector67 were using that to document their Anilam to LinuxCNC retro-fit and I'm inkling to give a try. It looked pretty nice and would give you room to grow into circuit boards if you wanted to go that direction. Here's the link for sector67, if interested to look at what they did (scroll down the page): https://code.google.com/p/sector67-sandbox/wiki/ProjectSheetCake Good luck - Mark -------- Original Message -------- Subject: [Emc-users] Linux Program for Wiring Diagrams From: "linden" <[email protected]> Date: Fri, January 23, 2015 9:34 pm To: "Enhanced Machine Controller (EMC)" <[email protected]> I need to consolidate all my scribe notes and scraps of paper for my linux cnc XYZ table and need to plan out the conversion of my tree 325. Dose any one have any suggestions for making wireing diagrams. I have found lots of programs for pcb design but I am looking to produce block diagrams and wiring diagrams with pin outs ect. any suggestions or experience. thanks Linden ------------------------------------------------------------ ------------------ New Year. New Location. New Benefits. New Data Center in Ashburn, VA. GigeNET is offering a free month of service with a new server in Ashburn. Choose from 2 high performing configs, both with 100TB of bandwidth. Higher redundancy.Lower latency.Increased capacity.Completely compliant. http://p.sf.net/sfu/gigenet _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------ Message: 3 Date: Sat, 24 Jan 2015 08:00:50 -0800 From: Mark Johnsen <[email protected]> Subject: Re: [Emc-users] Manual Mill Setup Question To: [email protected] Message-ID: <caaae+a36repwomyajpxt3hwhhzed9uuyjkpy1tn7f3pdhzo...@mail.gmail.com> Content-Type: text/plain; charset=UTF-8 Todd, Kirk Wallace has done a PyVCP panel that is worth checking out, he posted a link to it here: http://www.wallacecompany.com/machine_shop/EMC2/dro_vfd/ Mark PS - Thanks again everyone for your replies. Date: Fri, 23 Jan 2015 14:11:44 -0500 (EST) From: "Todd Zuercher" <[email protected]> Subject: Re: [Emc-users] Manual Mill Setup Question To: "Enhanced Machine Controller (EMC)" <[email protected]> Message-ID: <[email protected]> Content-Type: text/plain; charset=utf-8 Would it be possible to build a pyvcp panel that can control the spindle as you need it while Linuxcnc is in the "off" mode? ------------------------------ Message: 4 Date: Sat, 24 Jan 2015 08:49:20 -0800 From: Kirk Wallace <[email protected]> Subject: [Emc-users] DC Supply To: "Enhanced Machine Controller (EMC)" <[email protected]> Message-ID: <[email protected]> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Thinking aloud... I have been playing with an MA860H stepper drive which seems to work well enough for my mill. http://wallacecompany.com/ma860h/ http://www.wallacecompany.com/machine_shop/Shizuoka/ I have an Antek toroidal transformer that is feeding 75 VAC to the drive. The drive has an input limit of 80 VAC or 110 VDC. Although, to feed three drives, I'll need a bigger transformer to supply 15 Amps or more. I can use a 60Hz big iron transformer, but these are big, heavy and expensive to purchase and ship. I could use multiple toroids, but these are expensive. Then I got to thinking. What about a buck converter to convert mains (120 or 240 VAC) to mains DC to high Hz AC to let's say 90 VDC? Or more simply, pump the useful part of the mains AC into a large capacitor in a way that maintains the DC voltage I need? This sounds a little like an SCR circuit, such as a light dimmer, universal motor speed controller, or SCR DC welder. This might be a way to leverage a cheap second hand commodity device to a specialty purpose. (But keeping in mind that common converters don't like their outputs switched.) So, what are some ways of feeding roughly 90 VDC or 70 VAC at 15 Amps to motor drives from 240 VAC mains? -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ ------------------------------ Message: 5 Date: Sat, 24 Jan 2015 11:11:01 -0600 From: Jon Elson <[email protected]> Subject: Re: [Emc-users] Linux Program for Wiring Diagrams To: "Enhanced Machine Controller (EMC)" <[email protected]> Message-ID: <[email protected]> Content-Type: text/plain; charset=ISO-8859-1; format=flowed On 01/23/2015 08:34 PM, linden wrote: > I need to consolidate all my scribe notes and scraps of paper for my > linux cnc XYZ table and need to plan out the conversion of my tree 325. > Dose any one have any suggestions for making wireing diagrams. I have > found lots of programs for pcb design but I am looking to produce block > diagrams and wiring diagrams with pin outs ect. any suggestions or > experience. > > One think that might be more program that you need is kicad. it can be built for either Linux or Windows. It definitely has a decent schematic editor with component library editor, too. (I use Protel 99 under Win XP in a virtualbox environment. This is a far better PCB program, so I keep on using it. Perhaps someday, kicad will catch up to it.) Jon ------------------------------ Message: 6 Date: Sat, 24 Jan 2015 11:18:27 -0600 From: Jon Elson <[email protected]> Subject: Re: [Emc-users] 3x Servo-To-Go 4 axis isa cards for a bottle of wine, if anybody still needs them To: "Enhanced Machine Controller (EMC)" <[email protected]> Message-ID: <[email protected]> Content-Type: text/plain; charset=ISO-8859-1; format=flowed On 01/23/2015 09:51 PM, Peter Blodow wrote: > Max, > from the servotogo site, I can't quite see how the cards are used. There > are a keyboard and an ethernet jack plus 4 ISA slots. What fits into > these, and how are the cards used? What else is neded to put thew things > to work? The servotogo site gives me lots of error messages when I try > to read their manual. And where are you located? > > The servo to go board I used years ago, which I THINK is the board we are talking about, is the SECOND picture on their web site. it plugs into an ISA slot, and can control up to 4 or 8 axes. It has a US Digital encoder counter chip and a DAC, plus a header for some TTL digital I/O. The card in their picture is obviously an updated version of what I had, mine had no Xilinx FPGA or CPLD on it. I don't know what the top picture is, but it may allow you to use up to 4 of their motion interface boards from ethernet. It may have some sort of Arduino or similar CPU in that mezzanine board. I couldn't get the docs for that board to work. Jon ------------------------------ Message: 7 Date: Sat, 24 Jan 2015 09:19:01 -0800 (PST) From: "Peter C. Wallace" <[email protected]> Subject: Re: [Emc-users] DC Supply To: "Enhanced Machine Controller (EMC)" <[email protected]> Message-ID: <[email protected]> Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed On Sat, 24 Jan 2015, Kirk Wallace wrote: > Date: Sat, 24 Jan 2015 08:49:20 -0800 > From: Kirk Wallace <[email protected]> > Reply-To: "Enhanced Machine Controller (EMC)" > <[email protected]> > To: "Enhanced Machine Controller (EMC)" <[email protected]> > Subject: [Emc-users] DC Supply > > Thinking aloud... > > I have been playing with an MA860H stepper drive which seems to work > well enough for my mill. > http://wallacecompany.com/ma860h/ > http://www.wallacecompany.com/machine_shop/Shizuoka/ > > I have an Antek toroidal transformer that is feeding 75 VAC to the > drive. The drive has an input limit of 80 VAC or 110 VDC. Although, to > feed three drives, I'll need a bigger transformer to supply 15 Amps or > more. I can use a 60Hz big iron transformer, but these are big, heavy > and expensive to purchase and ship. I could use multiple toroids, but > these are expensive. > > Then I got to thinking. What about a buck converter to convert mains > (120 or 240 VAC) to mains DC to high Hz AC to let's say 90 VDC? Or more > simply, pump the useful part of the mains AC into a large capacitor in a > way that maintains the DC voltage I need? This sounds a little like an > SCR circuit, such as a light dimmer, universal motor speed controller, > or SCR DC welder. This might be a way to leverage a cheap second hand > commodity device to a specialty purpose. (But keeping in mind that > common converters don't like their outputs switched.) > > So, what are some ways of feeding roughly 90 VDC or 70 VAC at 15 Amps to > motor drives from 240 VAC mains? > > -- > Kirk Wallace > http://www.wallacecompany.com/machine_shop/ > http://www.wallacecompany.com/E45/ A SCR controller should work, _but_ it will have trouble with a capacitor input filter because of the fast rise time when the SCR turns on. This will cause very large current spike charging the filter capacitors. A solution woudld be to use a inductor input filter but unfortunately the rather large filter inductor requied will be expensive Using a single MOSFET, you could reverse the timing and do phase control on the rectified DC by turning the MOSFET on at zero crossings and off when the 120Hz pulsating DC has reached the proper voltage. > > ------------------------------------------------------------------------------ > > New Year. New Location. New Benefits. New Data Center in Ashburn, VA. > GigeNET is offering a free month of service with a new server in Ashburn. > Choose from 2 high performing configs, both with 100TB of bandwidth. > Higher redundancy.Lower latency.Increased capacity.Completely compliant. > http://p.sf.net/sfu/gigenet > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination. ------------------------------ Message: 8 Date: Sat, 24 Jan 2015 10:39:17 -0700 From: Sebastian Kuzminsky <[email protected]> Subject: Re: [Emc-users] Stg documentation, opamp error on the servo-to-go stg card with switch mode dc dc converters in modern atx power supplies To: "Enhanced Machine Controller (EMC)" <[email protected]> Message-ID: <[email protected]> Content-Type: text/plain; charset=windows-1252 On 01/23/2015 03:37 AM, MH wrote: > Hello, > > could somebody include a sidenote in the servo-to-go stg documentation here > http://www.linuxcnc.org/docs/html/drivers/servo_to_go.html > that the opamps on the stg card do not work with all newer atx power > supplies that use modern switch mode DC-DC converters? Hi Max, thanks for this info. I added a blurb, it's building right now and will show up here within the hour or so: http://www.linuxcnc.org/docs/2.6/html/drivers/servo_to_go.html -- Sebastian Kuzminsky ------------------------------ ------------------------------------------------------------------------------ New Year. New Location. New Benefits. New Data Center in Ashburn, VA. GigeNET is offering a free month of service with a new server in Ashburn. Choose from 2 high performing configs, both with 100TB of bandwidth. Higher redundancy.Lower latency.Increased capacity.Completely compliant. http://p.sf.net/sfu/gigenet ------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users End of Emc-users Digest, Vol 105, Issue 40 ****************************************** ------------------------------------------------------------------------------ New Year. New Location. New Benefits. New Data Center in Ashburn, VA. GigeNET is offering a free month of service with a new server in Ashburn. Choose from 2 high performing configs, both with 100TB of bandwidth. Higher redundancy.Lower latency.Increased capacity.Completely compliant. http://p.sf.net/sfu/gigenet _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
