Re: [Emc-users] Power Tapping
I'm in St Catharines, ON. You can see my efforts on YT at https://www.youtube.com/channel/UCVGnYkMO0yDPVG8buGy_u3w although no thread milling there yet. Gerrit -Original Message- From: John Dammeyer Sent: July 7, 2021 10:22 PM To: 'Enhanced Machine Controller (EMC)' Subject: Re: [Emc-users] Power Tapping Where are you located? ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Power Tapping
I should have added YG-1's Canadian office info: http://yg1.ca/field.asp I'm back to practicing drilling and thread milling M6 in 1/2 aluminum plate on Friday. My shop bult gantry mill/router has its swarf containment system in place at last. Gerrit -Original Message- From: John Dammeyer Sent: July 7, 2021 8:52 PM To: 'Enhanced Machine Controller (EMC)' Subject: Re: [Emc-users] Power Tapping Well in that case it's cheaper than the Swiss one. What I have found so far is that the cheap metric tap+die+handle was fine for the occasional hole but really garbage for anything else. I'm definitely headed in the direction that the quality of the threaded hole is directly due to the quality of the tap (or die). I've ordered one of each of 10-24, 1/4-20 and 3/8-16. Need to find some reasonable metric ones yet too. Give the last few days anguishing over HAL file parameters and Break Out Board issues the experiment this afternoon watching the tap thread was quite a treat. John ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Power Tapping
YG-1 is hardly no-name. https://www.yg1.kr/main.asp Gerrit -Original Message- From: John Dammeyer Sent: July 7, 2021 7:37 PM To: 'Enhanced Machine Controller (EMC)' Subject: Re: [Emc-users] Power Tapping It's an Amazon Prime product so shipping is free but yes, in Canadian $ half the price of the Swiss one and probably should be 1/4 the price since it's no name. ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Machining question
Reamers don't work well in nominal size holes. So always leave enough meat ofr it to do its work. The attached link gives good info on that topic. Machine reamers cut on the leading edge only, there is no taper. Hand reamers have a taper, and won't cut to a shoulder. If concentricity is the key goal, then drill well under size, bore to reamer alloance and then ream. https://www.fltechnical.com/news/reamer-guide-basic-technical-information-for-reamers Gerrit -Original Message- From: John Dammeyer Sent: June 18, 2021 11:49 AM To: Enhanced Machine Controller (EMC) Subject: [Emc-users] Machining question This isn't as much a LinuxCNC question but more of an approach to how to machine something. The attached photo shows a coupler from a 3/8" encoder to 14mm Servo Motor so I can test on the bench the Pi4 closed loop encoder behavior. This one didn't turn out very well. I drilled all the way through and then used a reamer to bring it to 3/8". It's a firm sliding fit on the encoder shaft. Without removing it from the chuck I then drilled halfway to 13mm and then used a 14mm reamer to bring it to size, testing with the motor shaft. Problem was the reamer was slightly tapered at the front so it did a poor job. I finished it up with the boring tool but maybe a few thou too large. However the wobble seems much worse than that. I'm thinking the better approach would be to drill all the way through undersize 3/8" and then drill half way with 13mm. Then only use the boring tool to bring the back half up to 3/8" and the front up to 14mm. This way if the initial hole wasn't concentric with rotation the boring tool would ensure it is. Make sense? Or is there a better way? Thanks John ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] all the MESA cards talk made me think
Others will have more experience, mine is relatively recent. The 7i92 in my setup interfaces to the BOB (PMDX132 in my case). It is driving 4 axes on a shop made gantry-type mill. The actual stepper drivers on the PMDX132 are Gecko 201's, nothing stellar but it was almost free, and it works If you pick the right 7i92 version it has a DB25 as one of the 2 connectors. The Mesa board would directly connect to your PC using an ethernet cable. Gerrit -Original Message- From: R C Sent: June 13, 2021 9:13 PM To: emc-users@lists.sourceforge.net Subject: Re: [Emc-users] all the MESA cards talk made me think I just looked up what a PMDX132 is, part of my problem is that the parallel PCI card I used appears to be broken, and of course they are harder to get. So I wouldn't mind switching to an ethernet based controller in the PC side (Dell T5500/T7500). I have seen the 7i92 mentioned, and others, can they do multiple stepper motors? (right now I am using a parallel BOB, that connects to steopper drivers (ala DM542), which drive the actual steppers.) thanks, Ron On 6/13/21 7:03 PM, Gerrit Visser wrote: > I choose a 7i92 to connect my PC with a PMDX132 to run PathPilot (which has > LinuxCNC inside). Depending on your BOB it might be plug-play with pre-build > .bit files to configure the Mesa card. > My reason for going with ethernet version was to reduce electrical grounding > issues. Had too many of those in the past with direct connected stuff. It > also expands the choice of PC to run LinuxCNC on, doesn't need a pci or pcie > slot this way. > > Gerrit > > -Original Message- > From: R C > Sent: June 13, 2021 8:43 PM > To: linuxcnc-users-list > Subject: [Emc-users] all the MESA cards talk made me think > > Hello, > > > I have a 'desktop' mill and lathe (both Sherline), and I am using a parallel > BOB and printer ports to run them. Of course one of them just gave up > (PCI printer card), I do have a spare but they are harder to come by, > besides, the setup is not really ideal? > > > What would be the best way to replace the BOB-LPT stuff? (these things are > desktop CNC machines, I am playing/learning for fun, I am not trying to > reliably machine F22 raptor jet engine parts, I am mostly turning stock into > scrap). > > > I see some cards that are in the $50 etc range, and there are the > ones that use ether/cat5 connections (are 'regular' ethernet cards > used with > those?) > > > I am looking at a lathe that has 2 steppers, and it has a quadrature encoder, > the mill has 3 steppers, and planning on adding a quadrature encoder). > > > thanks, > > > Ron > > > > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] all the MESA cards talk made me think
I choose a 7i92 to connect my PC with a PMDX132 to run PathPilot (which has LinuxCNC inside). Depending on your BOB it might be plug-play with pre-build .bit files to configure the Mesa card. My reason for going with ethernet version was to reduce electrical grounding issues. Had too many of those in the past with direct connected stuff. It also expands the choice of PC to run LinuxCNC on, doesn't need a pci or pcie slot this way. Gerrit -Original Message- From: R C Sent: June 13, 2021 8:43 PM To: linuxcnc-users-list Subject: [Emc-users] all the MESA cards talk made me think Hello, I have a 'desktop' mill and lathe (both Sherline), and I am using a parallel BOB and printer ports to run them. Of course one of them just gave up (PCI printer card), I do have a spare but they are harder to come by, besides, the setup is not really ideal? What would be the best way to replace the BOB-LPT stuff? (these things are desktop CNC machines, I am playing/learning for fun, I am not trying to reliably machine F22 raptor jet engine parts, I am mostly turning stock into scrap). I see some cards that are in the $50 etc range, and there are the ones that use ether/cat5 connections (are 'regular' ethernet cards used with those?) I am looking at a lathe that has 2 steppers, and it has a quadrature encoder, the mill has 3 steppers, and planning on adding a quadrature encoder). thanks, Ron ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Touch screen for LinuxCNC
Hi Gene >From discussions with users of my now-archived Gui, they were using it for anything from laser 'etching' wood with a lot of tiny moves to a Bridgeport and 2" facemills. Grbl is quite capable, people get hung up on the lack of some G codes and tool changes but for the most part in small shops and hobbyists it makes little difference. Even for thread milling and drilling there are other options to generate gcode. Fusion360 has a post for Grbl so it is possible to stay within its limits. Grbl is certainly much easier to install than IinuxCNC so if it does enough then that is a plus in my opinion. Grbl gets few updates because in the main it is supported by 1 person who is busy with life. Gerrit -Original Message- From: Gene Heskett Sent: June 2, 2021 7:41 AM And that is much more informative, Gerrit, thank you. For grbl based systems. But LCNC has progressed beyond grbl, or that is my understanding. I haven't actually seen a comparison of what each can do. Does such exist? I suspect not, as it would be quickly rendered out of date by the next github commit. Cheers, Gene Heskett ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Touch screen for LinuxCNC
That is totally on the person who put it on Github, there are plenty of ways to illustrate and describe what a project is. That is what the Wiki section is for. I find the terse method rather prevalent amongst FOSS projects. Just like the 'who needs a manual, just read the code' approach. This wiki e.g. shows (IMHO) at a glance what you are looking at: https://github.com/gerritv/Grbl-Panel/wiki Gerrit -Original Message- From: Gene Heskett Sent: June 2, 2021 1:58 AM And this nicely demo's github's total lack of a way to see what this project does ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Touch screen for LinuxCNC
I bought this last month for use with Pathpilot. Works great. Resistive touch so not sensitive to wet fingers. https://www.amazon.ca/gp/product/B083WF327D CA$250 plus HST Gerrit -Original Message- From: John Dammeyer Sent: June 1, 2021 7:07 PM To: Enhanced Machine Controller (EMC) Subject: [Emc-users] Touch screen for LinuxCNC If I wanted to set up a Pi4 with LinuxCNC and a touch screen is there any particular one that jumps out as the best solution? And with an LCD display/touch screen other than 'axis' what is a more usable screen? Thanks John ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] primitive code question from a C/C++ newbie
Primitive in this context would mean 'most basic', 'lowest level'. Gerrit -Original Message- From: Stuart Stevenson Sent: April 13, 2021 7:23 PM To: Enhanced Machine Controller (EMC) ; Emc2-developers Subject: [Emc-users] primitive code question from a C/C++ newbie Hi, src/emc/rs274ngc/interp_convert.cc line 1897 has the term 'primitive code' What is the definition of primitive code in this context? Let me know if this is something I can search the internet to learn. thanks Stuart -- Addressee is the intended audience. If you are not the addressee then my consent is not given for you to read this email furthermore it is my wish you would close this without saving or reading, and cease and desist from saving or opening my private correspondence. Thank you for honoring my wish. ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Probe recommendations.
I am still at the 'tooling breakage' stage of cnc. So far only 1 Aliexpress tip broken (CA$12 cost). I have some more on the way because I expect it won't be the last broken one. I have 2 Renishaw TP2's, they are surviving my inexperience so far. M2 threads. Renishaw makes a sacrificial breakaway adapter, essentially a short piece of material with a groove. Male and female M4 threads at opposite ends. It however costs more than you were spending on just the probe. Ken, this might be an option to try? https://www.aliexpress.com/item/1005001421085958.html . If you make the breakaway adapter then the more plentiful choices of M2 and M2.5 threaded ones can come into play as well. gerrit -Original Message- From: ken.stra...@gmail.com Sent: March 14, 2021 3:37 PM To: 'Enhanced Machine Controller (EMC)' Subject: Re: [Emc-users] Probe recommendations. Yes, I use standard 4mm screw probes. Perhaps us$50 is "reasonable" but I'm just a hobbyist/retiree and I find that breakage due to stupidity annoying. I'd rather spend a similar amount on a decent bottle of wine! ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Probe recommendations.
The store is in Belarus, if that helps. -Original Message- From: Gene Heskett Sent: March 14, 2021 1:09 PM To: emc-users@lists.sourceforge.net Subject: Re: [Emc-users] Probe recommendations. I went to the web site, very sparse with its data, but that is a decent enough price, that I wonder what the shipping may be, and from where? Thanks Andy. Cheers, Gene Heskett ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] lathe paths with linux cnc and CAD software
The hobby/free non-commercial download is on LH side of this page. https://www.autodesk.com/products/fusion-360/free-trial Renew it every year, free but of course limited to non-commercial use and no 4th axis etc. Gerrit -Original Message- From: Thomas J Powderly [mailto:tjt...@gmail.com] Sent: February 3, 2021 11:03 AM To: emc-users@lists.sourceforge.net Subject: Re: [Emc-users] lathe paths with linux cnc and CAD software Hi Chris Fusion360 looks very nice. I see Fusion360 can run 'under linux', that is it can run in a VM. https://all3dp.com/2/fusion-360-for-linux-how-to-install-it/ but what did you download? What I see on the website [snipped] ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] EDM from scratch
Thank you Thomas, filed your excellent info for my project. Just finishing up a shop built cnc gantry machine (uses Pathpilot), then onto the next project which I think will be a WEDM machine. Gerrit -Original Message- From: Thomas J Powderly [mailto:tjt...@gmail.com] Sent: February 1, 2021 12:57 AM To: emc-users@lists.sourceforge.net Subject: Re: [Emc-users] EDM from scratch Hi Gerrit the difference between senkung and draht erodien generator is the pulse width in wedm 1-10uS is the entire spectrum in sink edm 1-3000uS is the spectrum in any edm that uses the very sort pulse, it is important that the current shut-off be complete and very fast ( all inductanc ein system must be watched) if you can turn the power OFF very very quickly, you will increase the metal removal a LOT. the reason is the metal removel is the expulsion of a tiny crate pool of molten material if the thermal change ( from current supplied an heating the pool) to the time hwne current is removed and the thermal mass of the surrounding environment ( oil water gas ) that makes for a more IMplosive force on the hot plasma bubble channel over the pool. The quickness of the bubble collapse cause more of the puddle to be ejected a slower deflating lets most of the melted material to cool back on the surface look for Dr. Schumakers description from AGie i cant find it now but it was an excellent presentation of how a spark removes material the 9 or so pictures are a whole edm education but try this instead https://core.ac.uk/download/pdf/34635871.pdf best of luck with the wedm (btw it will be a good hole drill spark generaor if it works for wed, just needs up to 100uS max on time ) tomp On 2/1/21 12:53 AM, Gerrit Visser wrote: > Another source of information about pulse generator design: > https://langfordw.pages.cba.mit.edu/desktopWEDM/electronics/ > > https://www.cnc.info.pl/drazenie-metoda-domowa-moje-proby-t11692-20.ht > ml (Google translate helps here:-)) > > Again, my focus is on wire EDM but there must be similarities > > Gerrit > > > > > > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] EDM from scratch
Issue 168, Oct 2010 is the first installment Gerrit -Original Message- From: John Dammeyer [mailto:jo...@autoartisans.com] Sent: January 31, 2021 1:31 PM To: 'Enhanced Machine Controller (EMC)' Subject: Re: [Emc-users] EDM from scratch Andy, Check out this page: http://mikesworkshop.weebly.com/a-spark-erosion-apparatus.html Also Model Engineer's workshop had a 4 part series on building one. I'll go through my archives and see if I can find them. I'm pretty sure I had all 4. An online search doesn't pinpoint which issues. John Dammeyer ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] EDM from scratch
Another source of information about pulse generator design: https://langfordw.pages.cba.mit.edu/desktopWEDM/electronics/ https://www.cnc.info.pl/drazenie-metoda-domowa-moje-proby-t11692-20.html (Google translate helps here:-)) Again, my focus is on wire EDM but there must be similarities Gerrit ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] EDM from scratch
There might be some gems in this video? I have an interest (presently on hold) to make a wire edm so have been collecting information etc. https://www.youtube.com/watch?v=9IWWa0xCd04=9s There is also a Polish forum where someone describes their power supply as well as details on how they use LinuxCNC to run a wire edm. There might be similarities to what you are looking for. Gerrit ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
