On Tuesday 16 June 2015 23:05:37 richsh...@comcast.net wrote: > Gene: > McMaster Carr has metric version lovejoy couplings available, in most > of the standard sizes.
Sure, at $50+ a copy. I can make me something for that. > > ----- 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&prod > >ucts_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 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
