Gene: McMaster Carr has metric version lovejoy couplings available, in most of the standard sizes.
----- Original Message ----- From: emc-users-requ...@lists.sourceforge.net To: emc-users@lists.sourceforge.net Sent: Tuesday, June 16, 2015 3:11:58 PM Subject: Emc-users Digest, Vol 110, Issue 57 Send Emc-users mailing list submissions to emc-users@lists.sourceforge.net 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 emc-users-requ...@lists.sourceforge.net You can reach the person managing the list at emc-users-ow...@lists.sourceforge.net When replying, please edit your Subject line so it is more specific than "Re: Contents of Emc-users digest..." Today's Topics: 1. Re: Driver for 48V BLDC servo motor (Marius Alksnys) 2. Lovejoy size miss-match (Gene Heskett) 3. Re: Lovejoy size miss-match (Todd Zuercher) 4. Re: Lovejoy size miss-match (Gene Heskett) 5. Re: Lovejoy size miss-match (Gene Heskett) 6. Re: GutHub getting sneaky? Yes. (George Ramsower) 7. Re: GutHub getting sneaky? Yes. (Gene Heskett) ---------------------------------------------------------------------- Message: 1 Date: Tue, 16 Jun 2015 22:28:48 +0300 From: Marius Alksnys <marius.alks...@gmail.com> Subject: Re: [Emc-users] Driver for 48V BLDC servo motor To: emc-users@lists.sourceforge.net Message-ID: <mlptdd$6rc$1...@ger.gmane.org> Content-Type: text/plain; charset=windows-1252; format=flowed I integrated a lot of 7i39's, thus I know them well enough. But they are rated at 250W, HV version limited to 7.5A per phase, which, when reached, makes quite big torque gap, so it is not recommended to use 7i39 near its maximum current limit. I even found better lead angles not to trigger 7i39 overcurrent protection, solved over-voltage problem while decelerating. I would say 250W-300W is their maximum limit, while 250W rated motor can get or even deliver 750W power temporarily, which is very useful for acceleration or other temporary load conditions. Not to mention averaging of sines, which shows 7i39's even weaker. Pico BLDC PWM servo amplifier is something I considered earlier, but did not choose as it has no sine commutation capability. I am looking at it with new eyes. I could use it for some applications. I know IRAMS module, but I doubt they are capable to deliver 10-15 Amps per phase, which are needed for such voltage motors of similar power. Yes, IRAMS could be great for higher voltage motors.. Looking from economic point of view it would be great to have amplifiers for such motors in a price range between 60 and 110 USD for one motor IMO. On 2015.06.15 00:38, andy pugh wrote: > On 14 June 2015 at 21:08, Marius Alksnys <marius.alks...@gmail.com> wrote: >> Does anybody know BLDC motor drivers suitable to run BLDC servo motor: >> rated at 230W, 48V, 8 poles, 3000 RPM? > Both Pico and Mesa do drivers that are suitable. > http://pico-systems.com/osc2.5/catalog/product_info.php?cPath=3&products_id=20 > > http://store.mesanet.com/index.php?route=product/product&filter_name=7i39&product_id=145 > > > The Anaheim ones should work too, but note that the Pico one is rated > to higher voltage and the Mesa one is actually a dual-motor driver. > However it needs to be connected to a Mesa FPGA card to operate as the > 3-phase PWM signals are created by the FPGA, not the drive. > >> I want to control the motor using one PWM and three hall signals or >> three phase PWM. >> Has anybody succeeded running some simple BLDC drivers for that? > I built my own (300V drive) using an IRAMS module. > ------------------------------ Message: 2 Date: Tue, 16 Jun 2015 16:01:31 -0400 From: Gene Heskett <ghesk...@wdtv.com> Subject: [Emc-users] Lovejoy size miss-match To: emc-users@lists.sourceforge.net Message-ID: <201506161601.31421.ghesk...@wdtv.com> Content-Type: text/plain; charset="us-ascii" Greetings all; The screw kit came in today, looks to be decent, but came with Lovejoy style couplers, 2 for a 3/8" shaft motor and one for a 1/2" shaft motor. Unforch, the 470 oz/in XY motors have an 8mm shaft, where the 1600 oz/in Z motor has a 14mm shaft. This kit as bought from a separate vendor. Anybody wanna trade half lovejoy parts, I have 3 in inch, 2 @ .375" and 1 @ .500", need 2 @ 8mm and 1 @ 14mm. All in 4 legged cross pattern as the center element. It did not come with any instructions, and I have gone back thru the packing 3 times. This is the $699 kit from a David Clements in the cactus patch, and while his phone number is listed, its not in service. The Y axis in particular looks to be a puzzle as the nut doesn't appear to have a mounting tab as used by the grizzly part. Thanks guys. 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: 3 Date: Tue, 16 Jun 2015 16:34:37 -0400 (EDT) From: "Todd Zuercher" <zuerc...@embarqmail.com> Subject: Re: [Emc-users] Lovejoy size miss-match To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Message-ID: <2046543769.7278398.1434486877773.javamail.r...@embarqmail.com> Content-Type: text/plain; charset=utf-8 You can buy just the individual hubs from MSC. ----- Original Message ----- From: "Gene Heskett" <ghesk...@wdtv.com> To: emc-users@lists.sourceforge.net Sent: Tuesday, June 16, 2015 4:01:31 PM Subject: [Emc-users] Lovejoy size miss-match Greetings all; The screw kit came in today, looks to be decent, but came with Lovejoy style couplers, 2 for a 3/8" shaft motor and one for a 1/2" shaft motor. Unforch, the 470 oz/in XY motors have an 8mm shaft, where the 1600 oz/in Z motor has a 14mm shaft. This kit as bought from a separate vendor. Anybody wanna trade half lovejoy parts, I have 3 in inch, 2 @ .375" and 1 @ .500", need 2 @ 8mm and 1 @ 14mm. All in 4 legged cross pattern as the center element. It did not come with any instructions, and I have gone back thru the packing 3 times. This is the $699 kit from a David Clements in the cactus patch, and while his phone number is listed, its not in service. The Y axis in particular looks to be a puzzle as the nut doesn't appear to have a mounting tab as used by the grizzly part. Thanks guys. 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> ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------ Message: 4 Date: Tue, 16 Jun 2015 17:06:22 -0400 From: Gene Heskett <ghesk...@wdtv.com> Subject: Re: [Emc-users] Lovejoy size miss-match To: emc-users@lists.sourceforge.net Message-ID: <201506161706.22459.ghesk...@wdtv.com> Content-Type: Text/Plain; charset="iso-8859-1" On Tuesday 16 June 2015 16:34:37 Todd Zuercher wrote: > You can buy just the individual hubs from MSC. > Those that pop up under a search for lovejoy, have only the faintest resemblance to these, and are easily 4 or so times bigger. > ----- Original Message ----- > From: "Gene Heskett" <ghesk...@wdtv.com> > To: emc-users@lists.sourceforge.net > Sent: Tuesday, June 16, 2015 4:01:31 PM > Subject: [Emc-users] Lovejoy size miss-match > > Greetings all; > > The screw kit came in today, looks to be decent, but came with Lovejoy > style couplers, 2 for a 3/8" shaft motor and one for a 1/2" shaft > motor. > > Unforch, the 470 oz/in XY motors have an 8mm shaft, where the 1600 > oz/in Z motor has a 14mm shaft. This kit as bought from a separate > vendor. > > Anybody wanna trade half lovejoy parts, I have 3 in inch, 2 @ .375" > and 1 @ .500", need 2 @ 8mm and 1 @ 14mm. All in 4 legged cross > pattern as the center element. > > It did not come with any instructions, and I have gone back thru the > packing 3 times. This is the $699 kit from a David Clements in the > cactus patch, and while his phone number is listed, its not in > service. The Y axis in particular looks to be a puzzle as the nut > doesn't appear to have a mounting tab as used by the grizzly part. > > Thanks guys. > > Cheers, Gene Heskett 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: 5 Date: Tue, 16 Jun 2015 17:42:23 -0400 From: Gene Heskett <ghesk...@wdtv.com> Subject: Re: [Emc-users] Lovejoy size miss-match To: emc-users@lists.sourceforge.net Message-ID: <201506161742.23717.ghesk...@wdtv.com> Content-Type: Text/Plain; charset="iso-8859-1" On Tuesday 16 June 2015 16:34:37 Todd Zuercher wrote: > You can buy just the individual hubs from MSC. The only one that resembles these is their # 35407022, but it says the max bore is .500", and I need a 14mm bore while still being a 2 legged hub. I'll go measure these for OD & see if they have a part #. Nope, well polished alu, 30mm OD, 35mm assembled length,.3748" bore & I need an 8mm bore. Going up in bore size but holding to the same family so hubs would interchange, the up stops at 1/2". No 14mm in that frame size. McMasterCarr has similar items, but something north of 50 bucks for all 3 pieces. Thumbs down. On both hands. MSC sells at 1/4 that. I'll go search fleabay after din-din. > ----- Original Message ----- > From: "Gene Heskett" <ghesk...@wdtv.com> > To: emc-users@lists.sourceforge.net > Sent: Tuesday, June 16, 2015 4:01:31 PM > Subject: [Emc-users] Lovejoy size miss-match > > Greetings all; > > The screw kit came in today, looks to be decent, but came with Lovejoy > style couplers, 2 for a 3/8" shaft motor and one for a 1/2" shaft > motor. > > Unforch, the 470 oz/in XY motors have an 8mm shaft, where the 1600 > oz/in Z motor has a 14mm shaft. This kit as bought from a separate > vendor. > > Anybody wanna trade half lovejoy parts, I have 3 in inch, 2 @ .375" > and 1 @ .500", need 2 @ 8mm and 1 @ 14mm. All in 4 legged cross > pattern as the center element. > > It did not come with any instructions, and I have gone back thru the > packing 3 times. This is the $699 kit from a David Clements in the > cactus patch, and while his phone number is listed, its not in > service. The Y axis in particular looks to be a puzzle as the nut > doesn't appear to have a mounting tab as used by the grizzly part. > > Thanks guys. > > Cheers, Gene Heskett 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: 6 Date: Tue, 16 Jun 2015 16:58:05 -0500 From: George Ramsower <georg...@gvtc.com> Subject: Re: [Emc-users] GutHub getting sneaky? Yes. To: emc-users@lists.sourceforge.net Message-ID: <55809bed.5010...@gvtc.com> Content-Type: text/plain; charset=windows-1252; format=flowed On 6/16/2015 11:12 AM, Gene Heskett wrote: > > On Tuesday 16 June 2015 03:39:48 Erik Christiansen wrote: > > And its the main reason I host my own meager efforts right here on this > machine. I have been a fan of the TRS-80 Color Computer since the 80's, > and an os9/nitros9 author since the late 80's. Its been one hell of a > teacher as os9/nitros9 is a pretty full blown unix workalike that can > run on any 6x09 based machine with 64k of ram, fully > multiuser/multitasking (until it runs out of memory for the user, but > the way os9 level 2 maps memory, I have a whopping 2 megabytes in mine.) > 100% community supported today, and one fellow is running a web server > from his machine. Written in basic09. > > So I effectively have one leg back in Jurrasic times computerwise. :) > > There's a lurker here I think, who is running his small home made milling > machine with a "coco". He built all the motor drivers & interfacing > hardware for it. I'll let him speak up when he is ready. > > Cheers, Gene Heskett Thanks for the introduction, Gene. I'm that lurker! George Ramsower, just north of San Antonio. I do like my "Micro Mill" as they are called but I just call it a "Desktop Mill". Lately, I've been creating the rest of an alphabet. I already have 0-9 numbers and nine alpha characters written. As I get better, I intend to get back onto this particular software project. The objective here is to be able to make mail box tags and see if anyone will buy them. If there aren't any sales, it's not a big deal as then I can make one for MY mail box. That's all I really wanted to do anyway! I'll end up with labels and tags on several things around here. Then I can get back to building parts for my next steam engine. George R ------------------------------ Message: 7 Date: Tue, 16 Jun 2015 18:11:42 -0400 From: Gene Heskett <ghesk...@wdtv.com> Subject: Re: [Emc-users] GutHub getting sneaky? Yes. To: emc-users@lists.sourceforge.net Message-ID: <201506161811.42189.ghesk...@wdtv.com> Content-Type: Text/Plain; charset="iso-8859-1" On Tuesday 16 June 2015 17:58:05 George Ramsower wrote: > On 6/16/2015 11:12 AM, Gene Heskett wrote: > > On Tuesday 16 June 2015 03:39:48 Erik Christiansen wrote: > > > > And its the main reason I host my own meager efforts right here on > > this machine. I have been a fan of the TRS-80 Color Computer since > > the 80's, and an os9/nitros9 author since the late 80's. Its been > > one hell of a teacher as os9/nitros9 is a pretty full blown unix > > workalike that can run on any 6x09 based machine with 64k of ram, > > fully > > multiuser/multitasking (until it runs out of memory for the user, > > but the way os9 level 2 maps memory, I have a whopping 2 megabytes > > in mine.) 100% community supported today, and one fellow is running > > a web server from his machine. Written in basic09. > > > > So I effectively have one leg back in Jurrasic times computerwise. > > :) > > > > There's a lurker here I think, who is running his small home made > > milling machine with a "coco". He built all the motor drivers & > > interfacing hardware for it. I'll let him speak up when he is > > ready. > > > > Cheers, Gene Heskett > > Thanks for the introduction, Gene. I'm that lurker! Welcome George. We don't bite very often here. > George Ramsower, just north of San Antonio. > I do like my "Micro Mill" as they are called but I just call it a > "Desktop Mill". Lately, I've been creating the rest of an alphabet. I > already have 0-9 numbers and nine alpha characters written. > As I get better, I intend to get back onto this particular software > project. > The objective here is to be able to make mail box tags and see if > anyone will buy them. If there aren't any sales, it's not a big deal > as then I can make one for MY mail box. I engraved a brass plaque, for beside the doorbell, and for the mailbox. I had this brass kickplate laying around getting scuffed & nothing better to do for a few hours. ;-) > That's all I really wanted to > do anyway! I'll end up with labels and tags on several things around > here. Then I can get back to building parts for my next steam engine. > > George R while I have your attention, the hobby shops sell brass tubeing that each size telescopes in the next size or or down. For a piece thats 3/8" OD, what is the bore size? I need to shim a couple of lovejoys that are 3/8" bore, down to 8mm to fit some big honky nema 23's. Do-able? > > ---------------------------------------------------------------------- >-------- _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users 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> ------------------------------ ------------------------------------------------------------------------------ ------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users End of Emc-users Digest, Vol 110, Issue 57 ****************************************** ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
