Worked at a shop that had a Lagun vertical mill with one of those pneumatic cylinder/air impact type power tool changer things on it. Wore out the impact sockets! Didn't matter what brand tried. Proto impact series, Williams, SnapOn, Armstrong, etc. Finally figured it out, the socket HAS to be fully seated before the impact sequence is started. Oddly, the hex on the draw bar never did wear!
----- Original Message ----- From: [email protected] To: [email protected] Sent: Thursday, October 29, 2015 10:40:13 AM Subject: Emc-users Digest, Vol 114, Issue 56 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: Error in Documentation (John Thornton) 2. Re: cutter offset misunderstanding (lloyd wilson) 3. tool changers (Gene Heskett) 4. Re: tool changers (Bruce Layne) 5. Re: tool changers (andy pugh) 6. Re: tool changers (John Kasunich) 7. Re: tool changers (Jonathan Blissett) ---------------------------------------------------------------------- Message: 1 Date: Wed, 28 Oct 2015 09:44:40 -0500 From: John Thornton <[email protected]> Subject: Re: [Emc-users] Error in Documentation To: "Enhanced Machine Controller (EMC)" <[email protected]> Message-ID: <[email protected]> Content-Type: text/plain; charset=windows-1252; format=flowed Thanks for reporting this. JT On 10/27/2015 10:40 PM, Todd Zuercher wrote: > I've noticed a minor error in the documentation. > http://linuxcnc.org/docs/html/hal/parallel_port.html#_pins > I see that it says that the control pins (1,14,16,17) are outputs in all > modes. That isn't really true, in x-mode they are inputs. > ------------------------------ Message: 2 Date: Wed, 28 Oct 2015 15:10:00 -0400 From: lloyd wilson <[email protected]> Subject: Re: [Emc-users] cutter offset misunderstanding To: "Enhanced Machine Controller (EMC)" <[email protected]> Message-ID: <[email protected]> Content-Type: text/plain; charset=ISO-8859-1; format=flowed an update: I got the program to load properly by using longer lead-in motions - under some circumstances the compensation function seems to report a misleading error. thanks to all who looked at the issue. ldw On 10/28/2015 08:59 AM, lloyd wilson wrote: > Version is 2.8-pre (download early last month), running the Axis > simulator. > Selected tool (#1) is specified as .260" diameter in the tool table. > When I specify G41.1 D0.260, the program accepts the entry. > Complete program attached. > > On 10/28/2015 08:30 AM, Jeff Epler wrote: >> Can you please say what version of LinuxCNC you are running, and provide >> a complete program which illustrates the problem, rather than just a >> snippet? Please also use G41.1 D- instead of G41 so that the program >> does not depend on the details of your tool table, or provide the >> relevant tool table line. >> >> I converted your example into a complete ngc program and ran it on our >> current development version ("2.8.0-pre"), though I expect our current >> stable version (2.7.1) to behave the same. Unfortunately, I failed to >> reproduce the problem you report. >> >> Here's my program, which draws the portion of your path offset by 0, 5, >> 10, 20 and 50mm: >> >> G21 G40 G90.1 ; note, I assumed this part program is in mm >> F1000 >> >> O<path> sub >> G41.1 D[#1] >> G0X0.0000Y24.8610 >> G0Z-17.0000 >> M3 >> G1X7.5850Y21.5360Z-19.0000 >> G1X12.9820Z-19.0000 >> G1X24.4020Y11.5920Z-19.0000 >> G2X25.8100Y8.5000Z-19.0000I21.7100J8.5000 >> G40 >> O<path> endsub >> >> O<path> call [0] >> O<path> call [5] >> O<path> call [10] >> O<path> call [20] >> O<path> call [50] >> M2 >> >> All 5 paths show in the preview plot and run successfully using the >> sample configuration sim/axis/axis.ini. >> >> Jeff >> >> ------------------------------------------------------------------------------ >> >> >> _______________________________________________ >> Emc-users mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > > > > ------------------------------------------------------------------------------ > > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------ Message: 3 Date: Thu, 29 Oct 2015 10:22:12 -0400 From: Gene Heskett <[email protected]> Subject: [Emc-users] tool changers To: "Enhanced Machine Controller (EMC)" <[email protected]> Message-ID: <[email protected]> Content-Type: text/plain; charset="us-ascii" Greetings all; This particular carving project uses 3 different tools which must be changed 4 times per end of a board processed. This has got me to thinking of a tool changer device since I am spending about 1/2 of my time changing tools & other preparatory stuffs. At present, this thing has an R8 spindle, but I haven't tested to see if the spindle motor has the muscle to run the draw bolt if the wrench is held. I'd assume so if the gear selection was in low. However, putting it in low isn't easily done by hand. That big knob on the side is big for a reason, which is to give us a good grip to shift it with. It is, IMO, needlessly difficult to switch gears. I'd assume it is easily replaced by a longer lever, which could then be swung by a smaller motor to effect the gear change. This is the OEM spindle motor, rated at 1 HP when driven by the OEM SCR/Triac controller, but with Jon's PWM servo driver with about 110 volts of DC power, can be run 500 revs faster than the OEM controller I took off could run it, and is full power reversible, running a G33.1 rigid tapping cycle very nicely. I write it to "peck" the bigger taps above #10 or 5mm of course. So there is, for short duration efforts such as dropping the tool, or pulling the next one back in, likely more than enough torque to do that. Less torque needed there than in running the nut on the tormach ER-20 adaptor with a big Crescent wrench which is what I am presently using while the spindle is pin locked by the brake I made. Those are very nice, but run the cost per tool up about $50/tool so I only have one adaptor and 3 collets (sp?). Does anyone have any experience with this? Or am I just a beggar, wishing for a free horse, and designing my own saddle? 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 <http://geneslinuxbox.net:6309/gene> ------------------------------ Message: 4 Date: Thu, 29 Oct 2015 11:28:30 -0400 From: Bruce Layne <[email protected]> Subject: Re: [Emc-users] tool changers To: "Enhanced Machine Controller (EMC)" <[email protected]> Message-ID: <[email protected]> Content-Type: text/plain; charset=utf-8; format=flowed tormach ER-20 adaptor... Those are very nice, but run the cost per tool up about $50/tool so I only have one adapter and 3 collets I suggest you search eBay for the TTS compatible collet holders from our Chinese communist capitalist friends. I have a 50 position tool rack full of those, and I'm cheap, so they must not be anywhere close to $50 each. The quality is quite good. There is no groove for an ATC, but that's not a big deal for me and it'd be an easy feature to add on a lathe. I found them for you. :-) $16 each in quantities of ten on the slow boat. Maybe less if you search longer than the minute I spent. www.ebay.com/itm/161733955633 This has got me to thinking of a tool changer device since I am spending about 1/2 of my time changing tools & other preparatory stuffs. You probably already know this, but the poor man's power drawbar is an impact wrench to turn the drawbar. There are pneumatic versions with air cylinders to push a small butterfly impact driver down as it spins, but I'm an electrical engineer so I like electrical solutions. :-) It's hard to beat the lightweight 12V Porter Cable cordless impact driver from Lowe's. It reminds me of the Heywood Banks song about the Garden Weasel (search YouTube) - it's half the effort and twice as quick! I have an old beat up Harbor Freight cordless impact wrench that a friend gave me to use to make a power draw bar. I was going to wire it so it used full voltage for reverse and half voltage for forward, so it would tighten enough to hold the tool in the spindle, but would always be able to loosen anything it tightened. Sort of like those tanks that have the highest gears in reverse so they could get out of a bad situation faster than they got into it. I have all the parts to make the CNC controlled power drawbar for my mill, including a couple of large SMC air cylinders, a stack of Belleville washers to tension the drawbar when the air cylinders aren't pushing down on it, and a big pile of steel to build the beefy frame that mounts to the cast head of the milling machine... just as soon as I get a Round Tuit. Good luck with your woodworking and have fun! On 10/29/2015 10:22 AM, Gene Heskett wrote: > Greetings all; > > This particular carving project uses 3 different tools which must be > changed 4 times per end of a board processed. > > This has got me to thinking of a tool changer device since I am spending > about 1/2 of my time changing tools & other preparatory stuffs. > > At present, this thing has an R8 spindle, but I haven't tested to see if > the spindle motor has the muscle to run the draw bolt if the wrench is > held. I'd assume so if the gear selection was in low. > > However, putting it in low isn't easily done by hand. That big knob on > the side is big for a reason, which is to give us a good grip to shift > it with. It is, IMO, needlessly difficult to switch gears. I'd assume it > is easily replaced by a longer lever, which could then be swung by a > smaller motor to effect the gear change. This is the OEM spindle motor, > rated at 1 HP when driven by the OEM SCR/Triac controller, but with > Jon's PWM servo driver with about 110 volts of DC power, can be run 500 > revs faster than the OEM controller I took off could run it, and is full > power reversible, running a G33.1 rigid tapping cycle very nicely. I > write it to "peck" the bigger taps above #10 or 5mm of course. > > So there is, for short duration efforts such as dropping the tool, or > pulling the next one back in, likely more than enough torque to do that. > Less torque needed there than in running the nut on the tormach ER-20 > adaptor with a big Crescent wrench which is what I am presently using > while the spindle is pin locked by the brake I made. Those are very > nice, but run the cost per tool up about $50/tool so I only have one > adaptor and 3 collets (sp?). > > Does anyone have any experience with this? Or am I just a beggar, > wishing for a free horse, and designing my own saddle? > > Cheers, Gene Heskett ------------------------------ Message: 5 Date: Thu, 29 Oct 2015 15:42:14 +0000 From: andy pugh <[email protected]> Subject: Re: [Emc-users] tool changers To: "Enhanced Machine Controller (EMC)" <[email protected]> Message-ID: <CAN1+YZWovTqcU_P_d8syBFn8Yufvkf0ZtzsGj=2830jb_ly...@mail.gmail.com> Content-Type: text/plain; charset=UTF-8 On 29 October 2015 at 15:28, Bruce Layne <[email protected]> wrote: > I have all the parts to make the CNC controlled power drawbar for my > mill, including a couple of large SMC air cylinders, a stack of > Belleville washers to tension the drawbar when the air cylinders aren't > pushing down on it, and a big pile of steel to build the beefy frame > that mounts to the cast head of the milling machine... just as soon as I > get a Round Tuit. If you make your own cylinder it actually all gets a bit simpler. http://www.cnczone.com/forums/vertical-mill-lathe-project-log/109301-cnc.html (There is a link at the bottom to a video of it in action) -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------ Message: 6 Date: Thu, 29 Oct 2015 12:49:02 -0400 From: John Kasunich <[email protected]> Subject: Re: [Emc-users] tool changers To: [email protected] Message-ID: <1446137342.1103272.423791473.070ab...@webmail.messagingengine.com> Content-Type: text/plain On Thu, Oct 29, 2015, at 11:28 AM, Bruce Layne wrote: > tormach ER-20 adaptor... Those are very > nice, but run the cost per tool up about > $50/tool so I only have one adapter and > 3 collets > > > I suggest you search eBay for the TTS compatible collet holders from our > Chinese communist capitalist friends. I have a 50 position tool rack > full of those, and I'm cheap, so they must not be anywhere close to $50 > each. The quality is quite good. There is no groove for an ATC, but > that's not a big deal for me and it'd be an easy feature to add on a lathe. > > I found them for you. :-) $16 each in quantities of ten on the slow > boat. Maybe less if you search longer than the minute I spent. > > www.ebay.com/itm/161733955633 I bought ten of these. They arrived faster than expected, and the quality seems very good. One nuisance was that DHL wanted a signature, but I was able to leave a signed note on the door. I did quite a bit more than a minute of searching, this seems to be the best supplier. -- John Kasunich [email protected] ------------------------------ Message: 7 Date: Thu, 29 Oct 2015 17:18:10 +0000 From: Jonathan Blissett <[email protected]> Subject: Re: [Emc-users] tool changers To: "Enhanced Machine Controller (EMC)" <[email protected]> Message-ID: <CAFwcxQFLRptQ0mgUA=60pijvtvy+6ovfuqwrzvpqrc27kqw...@mail.gmail.com> Content-Type: text/plain; charset=UTF-8 You can ask the seller to put the groove in the toolholders - I did and it was still cheap. I've used them to convert an X3 mill. Some pictures and a video here: http://www.mycncuk.com/threads/7656-X3-mill-with-rails-ATC-new-motor On 29 October 2015 at 16:49, John Kasunich <[email protected]> wrote: > > > On Thu, Oct 29, 2015, at 11:28 AM, Bruce Layne wrote: > > tormach ER-20 adaptor... Those are very > > nice, but run the cost per tool up about > > $50/tool so I only have one adapter and > > 3 collets > > > > > > I suggest you search eBay for the TTS compatible collet holders from our > > Chinese communist capitalist friends. I have a 50 position tool rack > > full of those, and I'm cheap, so they must not be anywhere close to $50 > > each. The quality is quite good. There is no groove for an ATC, but > > that's not a big deal for me and it'd be an easy feature to add on a > lathe. > > > > I found them for you. :-) $16 each in quantities of ten on the slow > > boat. Maybe less if you search longer than the minute I spent. > > > > www.ebay.com/itm/161733955633 > > I bought ten of these. They arrived faster than expected, and the > quality seems very good. One nuisance was that DHL wanted a > signature, but I was able to leave a signed note on the door. > I did quite a bit more than a minute of searching, this seems to be > the best supplier. > > -- > John Kasunich > [email protected] > > > ------------------------------------------------------------------------------ > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------ ------------------------------------------------------------------------------ ------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users End of Emc-users Digest, Vol 114, Issue 56 ****************************************** ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
