Re: [Emc-users] Carbide drills
On 02/08/2012 01:53 AM, andy pugh wrote: On 8 February 2012 07:01, gene heskettghesk...@wdtv.com wrote: The lathe I can get all metal gears for, but the mill I would love to belt drive somehow, I put metal replacement gears in my mini-mill, and converted to oil-bath lubrication rather than handful of grease. I recommend a belt conversion, the metal gears are far too noisy for comfort. I've got the belt drive on my mini mill, and can whole-heartedly agree with Andy on the noise reduction. Plus, no more broken plastic gears to worry about. Mark -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Carbide drills
On 8 February 2012 13:10, Mark Wendt mark.we...@nrl.navy.mil wrote: I've got the belt drive on my mini mill, and can whole-heartedly agree with Andy on the noise reduction. Plus, no more broken plastic gears to worry about. The metal gears don't break, but they are a _lot_ noiser than the original plastic ones. -- atp The idea that there is no such thing as objective truth is, quite simply, wrong. -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Carbide drills
On 02/08/2012 06:58 AM, andy pugh wrote: On 8 February 2012 13:10, Mark Wendtmark.we...@nrl.navy.mil wrote: I've got the belt drive on my mini mill, and can whole-heartedly agree with Andy on the noise reduction. Plus, no more broken plastic gears to worry about. The metal gears don't break, but they are a _lot_ noiser than the original plastic ones. I'd considered going to the metal gears at first, but got talked into going with the belt drive. So far, it works great, and I do like the low noise level. I can actually hear the shop radio when I'm milling. ;-) Mark -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Carbide drills
On Wednesday, February 08, 2012 07:28:46 AM andy pugh did opine: On 8 February 2012 07:01, gene heskett ghesk...@wdtv.com wrote: The lathe I can get all metal gears for, but the mill I would love to belt drive somehow, I put metal replacement gears in my mini-mill, and converted to oil-bath lubrication rather than handful of grease. I recommend a belt conversion, the metal gears are far too noisy for comfort. :-) I've heard that lament before. And the plastic is noisy enough it gets tiresome. I guess that is why I'd consider a belt drive, some sort of a thing that would need the motor remounted on a slotted carrier so as to be able to use a Gilmer style belt. With the right, probably all home-made pulleys, there could be room for 3 speed steps with a 10mm belt like I used in the Z axis on that rebuild. That would take a lot of math I don't have a clue about how to do in order to fit the teeth precisely to the diameter of each step, all diddled so the motor comes back to the same rest position for each speed. I'd like to have a top speed of 900 or so in 1st gear, 2700 at the same motor revs in 2nd gear, and maybe 6 or 7 grand in top gear, but I have not measured the available room around the spindle to see if the min/max would allow that wide a range. AIR, and its been quite a while since I last looked at it, it has an idler gearset that is part of the existing gear shift. ATM though, I'm just thinking out loud, and it they fail outright in the next months while I working on the lathe, I'll just do the QD and replace whats there with OEM stuff that Chris can put on my front deck in 5 or 6 days. Other than too slow at top speed, its worked well for several years. Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) My web page: http://coyoteden.dyndns-free.com:85/gene How should I know if it works? That's what beta testers are for. I only coded it. (Attributed to Linus Torvalds, somewhere in a posting) -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Carbide drills
On 8 February 2012 14:52, gene heskett ghesk...@wdtv.com wrote: That would take a lot of math I don't have a clue about how to do in order to fit the teeth precisely to the diameter of each step, all diddled so the motor comes back to the same rest position for each speed. There is a handy calculator here: http://www.hpcgears.com/calc.htm The way I was going to do it was with permanently-engaged pulleys and belts free-running on bearings on the input shaft, with a keyed, sliding dog to choose which one engages the shaft. But I fooled myself into thinking that the oil-bath would make it all quiet enough. -- atp The idea that there is no such thing as objective truth is, quite simply, wrong. -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Carbide drills
On Wednesday, February 08, 2012 08:27:41 AM andy pugh did opine: On 8 February 2012 14:52, gene heskett ghesk...@wdtv.com wrote: That would take a lot of math I don't have a clue about how to do in order to fit the teeth precisely to the diameter of each step, all diddled so the motor comes back to the same rest position for each speed. There is a handy calculator here: http://www.hpcgears.com/calc.htm Bookmarked! Thanks. The way I was going to do it was with permanently-engaged pulleys and belts free-running on bearings on the input shaft, with a keyed, sliding dog to choose which one engages the shaft. But I fooled myself into thinking that the oil-bath would make it all quiet enough. I'd have to start with an all new housing design, that one is accessible to anything smaller than an adult mouse. Not even the grease stays where you put it. :-\ Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) My web page: http://coyoteden.dyndns-free.com:85/gene A door is what a dog is perpetually on the wrong side of. -- Ogden Nash -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Carbide drills
gene heskett wrote: I would think I can probably do that here Jon, since pcb-gcode uses the engraving bit to spot a starter dimple for the following drill operations. When I was off a couple thou, I've seen a #67 drill actually bend and use the marked spot a few times. At 18 thou, I expect I'd have to drop the Z feed rate from 6 ipm now though. My spindle is about 100k revs too slow. Well, due to my VFD only going to 400 Hz, I can't drill above 24,000 RPM, but that works fine. I can't remember what feed I used, but it doesn't take very long to poke through a .062 board, even at slow feeds. Jon -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Carbide drills
On Tuesday, February 07, 2012 11:49:13 PM Jon Elson did opine: gene heskett wrote: I would think I can probably do that here Jon, since pcb-gcode uses the engraving bit to spot a starter dimple for the following drill operations. When I was off a couple thou, I've seen a #67 drill actually bend and use the marked spot a few times. At 18 thou, I expect I'd have to drop the Z feed rate from 6 ipm now though. My spindle is about 100k revs too slow. Well, due to my VFD only going to 400 Hz, I can't drill above 24,000 RPM, but that works fine. I can't remember what feed I used, but it doesn't take very long to poke through a .062 board, even at slow feeds. Jon Now you're making me jealous, that is 10x what I can do. That may get 'fixed' at some point, I'm noting there is about 30 degrees of slack between the spindle the motor of late, so I expect I have some plastic gears with the center holes key slot about wobbled out. My 7x12 is suffering the same malady at two locations, so the X drive is about 30-45 degrees of slop when the chuck is reversed by hand. The lathe I can get all metal gears for, but the mill I would love to belt drive somehow, and drive the high gear about 3x what it can do now, effectively making a 3 speed out of it. I think the spindle can take 7-10k revs, at 2500 it doesn't heat at all other than what might telegraph down from the motor. And that's checking it after a 36 hour runtime. So I might have to pester Chris at LMS see if anyone has made a belt drive conversion for the micromill yet. Or, heaven forbid, make it myself. :) Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) My web page: http://coyoteden.dyndns-free.com:85/gene A man may be so much of everything that he is nothing of anything. -- Samuel Johnson -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Carbide drills
On 8 February 2012 07:01, gene heskett ghesk...@wdtv.com wrote: The lathe I can get all metal gears for, but the mill I would love to belt drive somehow, I put metal replacement gears in my mini-mill, and converted to oil-bath lubrication rather than handful of grease. I recommend a belt conversion, the metal gears are far too noisy for comfort. -- atp The idea that there is no such thing as objective truth is, quite simply, wrong. -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
