Re: [Emc-users] Docs clarification needed.
On 7 February 2012 08:31, gene heskett ghesk...@wdtv.com wrote: Anybody here know of a supplier for carbide drills in teeny wire sizes? eBay? http://www.ebay.com/itm/25-Micro-Carbide-Drill-Bits-Bit-PCB-Jewelry-CNC-/330683481262 -- 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] Docs clarification needed.
Gene, you are probably using green glass fiber enforced epoxi board. For just that reason I am using the good old brown Pertinax material (phenol hardened resin paper board), whatever it may be named in the US. Normal cheap HSS drills last forever unless they break. Peter Blodow gene heskett schrieb: On Tuesday, February 07, 2012 01:14:47 AM andy pugh did opine: On 6 February 2012 12:40, Erik Christiansen dva...@internode.on.net wrote: Gene, remembering your post about distaste for the tool table, Andy's opening sentence might put you off what seems a good suggestion, further down. Perhaps I should have been more clear that I was talking about the internal tool-length state rather than the tool file. Having said that, I use the tool table, but I never _edit_ the tool table. I use touch-off into the tool table which is an automated version of G10 Ln Late reply, sorry. Been carving code nursing my back. I have it about 80% working, and it looks like it will in fact work well. But I separated the TLO function and the top/bottom offset function, using G43.1 z# to apply the TLO, then for the X offset, setting G10 L2 p2 #result from hole probe, then switching to the G55 co-ordinate system to do the bottom side work. I say about 80% because I need to find some carbide drill bits in suitable sizes because an HSS drill bit seems only capable of drilling about 10 holes halfway through the board without getting so dull the copper is burred up for 5 thou around the hole. Topping that off, I used a deicer repair kit to add some robustness to the registration hole, which worked well, but when I was working on the same function for the bottom of the board, a ^% typu drug the probe sideways about 20 thou, wrecking the hole. The rest of the board looks well once the burrs were polished away, so I've set the G54-55 stuff up, and left it running, and will see if I can iso-etch the bottom tomorrow and have one usable board. I have more pcb material I can cut, but I'll have to find some more better drills to do any more of them. For stuff like this, it seems I should just buy an index of #10 to #70 carbide drills, but so far all I have found in the catalogs are TiN HSS stuff. Anybody here know of a supplier for carbide drills in teeny wire sizes? Cheers, Gene -- 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] Docs clarification needed.
gene heskett wrote: For stuff like this, it seems I should just buy an index of #10 to #70 carbide drills, but so far all I have found in the catalogs are TiN HSS stuff. Anybody here know of a supplier for carbide drills in teeny wire sizes? Just look on eBay, there are a bunch of guys usually selling small packs of assorted 'circuit board drills'. If you want exact sizes, that is a problem, but they usually sell an assortment of usable sizes. You need a spindle that runs REALLY true and has no Z-axis bobbles or wiggles to the side when it reverses. I've drilled down to .018 with an air-bearing spindle, but that is getting tricky. 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] Docs clarification needed.
On Tuesday, February 07, 2012 11:08:13 AM Greg Bernard did opine: Gene- Precise Bits has a good selection of tiny drills and endmills:http://www.precisebits.com/products/carbidebits/drills.asp?tsP T=wire. That led to Think Tinker which I've heard of favorably before, so I made out an order, but they declined the card, and when I tried to back up and check it (there's a 5 digit balance), they cleared the order page. Not a friendly site at all for for doing business over the net. These guys sell resharpened bits at an attractive price: http://drillcity.stores.yahoo.net/index.html . Who wanted my registration data before they would let me look, scrm. Also, I recently found an assortment of 10 microdrills at Harbor Freight for $5. I didn't find that, and their numbered drills down to #60 for a $20 bill were TiN coated but ultra cheap steel, I have a set of those someplace, none of which are even straight, nor were they the size marked! Thanks Greg, I guess I'll go back to Think Tinker try again, that did look like a decent quality product. Never did make the web order form transfer the basket to checkout, called, they got snotty, hung up. I also tried Hosfelt Electronics which had good prices on re-sharps, but either firefox 10, or their shopping cart SW is broken. I have repeatedly fill up my 'basket' with $65 to $85 worth of stuff, but when I click on checkout, the basket is empty. Good prices but gave up. Called, but girl refused to take order without creating an account first. Conclusion, FF 10 must be broken somehow. So I wind up at Midwest Circuit Technology, http://www.mctinfo.net/carbide-drill-bit/cat_17.html paid a wee bit more for brand new stuff, couldn't make his web page work either (still FF 10), so I called. For half the shipping everybody else wants for ground ups, it will be here tomorrow by post. Hell of a deal IMO. I'll pay gladly for that sort of service. Larry and I spent nearly half an hour yakking on the LL horn because he was curious about what I was doing with the stuff. I will do business with them again! Warning, Larry monitors the page, and will send you a chat message when you click on the link. Rings a loud gong here when it comes in. ;-) 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 If you would understand your own age, read the works of fiction produced in it. People in disguise speak freely. -- 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] Docs clarification needed.
On Tuesday, February 07, 2012 01:59:57 PM andy pugh did opine: On 7 February 2012 08:31, gene heskett ghesk...@wdtv.com wrote: Anybody here know of a supplier for carbide drills in teeny wire sizes? eBay? http://www.ebay.com/itm/25-Micro-Carbide-Drill-Bits-Bit-PCB-Jewelry-CNC- /330683481262 Maybe, but didn't cover the larger sizes I needed. Might do for the smaller stuff, but I wound up here: http://www.mctinfo.net/carbide-drill-bit/cat_17.html New stuff only. Very pleasant folks to do business with since they are in an adjacent state, shipping by USPS for $7, expected delivery tomorrow afternoon is very hard to beat. 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 The universe seems neither benign nor hostile, merely indifferent. -- Sagan -- 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] Docs clarification needed.
On Tuesday, February 07, 2012 02:08:07 PM Peter Blodow did opine: Gene, you are probably using green glass fiber enforced epoxi board. For just that reason I am using the good old brown Pertinax material (phenol hardened resin paper board), whatever it may be named in the US. Normal cheap HSS drills last forever unless they break. Peter Blodow Chuckle. :) I don't think there is any probably about it Peter, but its not green, but white, obviously a glass-epoxy panel from the way it frays with dull bits, with 1oz copper both sides. Its what I can get locally from the shack, and not all that pricey. Eats the edge off an 1/8 HSS drill bit in about a dozen halfway through the board holes. And 1/8 is almost too small to tune up with a drill doctor. 3/16 up, great, best edge ever, but 1/8 tends to get off-center in the DD's chucking lashup. 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 It is common sense to take a method and try it. If it fails, admit it frankly and try another. But above all, try something. -- Franklin D. Roosevelt -- 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] Docs clarification needed.
On Tuesday, February 07, 2012 02:23:02 PM Jon Elson did opine: gene heskett wrote: For stuff like this, it seems I should just buy an index of #10 to #70 carbide drills, but so far all I have found in the catalogs are TiN HSS stuff. Anybody here know of a supplier for carbide drills in teeny wire sizes? Just look on eBay, there are a bunch of guys usually selling small packs of assorted 'circuit board drills'. If you want exact sizes, that is a problem, but they usually sell an assortment of usable sizes. You need a spindle that runs REALLY true and has no Z-axis bobbles or wiggles to the side when it reverses. I've drilled down to .018 with an air-bearing spindle, but that is getting tricky. Jon 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. :-\ 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 I predict that today will be remembered until tomorrow! -- 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] Docs clarification needed.
gene heskett wrote: That led to Think Tinker which I've heard of favorably before, so I made out an order, but they declined the card, and when I tried to back up and check it (there's a 5 digit balance), they cleared the order page. Not a friendly site at all for for doing business over the net. I buy my dry film photoresist from them, they are MUCH cheaper than anybody else. Never had a problem with them. 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] Docs clarification needed.
On Tuesday, February 07, 2012 11:45:23 PM Jon Elson did opine: gene heskett wrote: That led to Think Tinker which I've heard of favorably before, so I made out an order, but they declined the card, and when I tried to back up and check it (there's a 5 digit balance), they cleared the order page. Not a friendly site at all for for doing business over the net. I buy my dry film photoresist from them, they are MUCH cheaper than anybody else. Never had a problem with them. Jon I've reluctantly came to the conclusion that FF 10 has a problem, Jon. When I had problems of the same nature with 3 web order forms in a row, its looking, quacking and waddling quite like that famous duck it must be... ;-) Thanks. 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] Docs clarification needed.
On 6 February 2012 05:54, gene heskett ghesk...@wdtv.com wrote: Obviously I have to use G92 to install the Z offset that compensates for the drill length, that is unavoidable from my reading. I have no lengths in my tool table since I'm using a drill chuck, making those lengths arbitrary and requiring I G38.2 to find this out after every tool change. I don't think that is obvious at all. In fact I think that G92 is the wrong way to do this, and the tool table is the right way. I would suggest that what you should do is use your probed length to set the tool-offset (G10 L1 or G10 L10, and G43) and use the hole-finding routine to set the coordinate system origin (G10 L2, or G10 L20) The purpose of G92 is mainly to put a duplicate shape somewhere else on a workpiece, as I understand it. -- atp The idea that there is no such thing as objective truth is, quite simply, wrong. -- Try before you buy = See our experts in action! 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-dev2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Docs clarification needed.
On Monday, February 06, 2012 03:25:49 AM andy pugh did opine: On 6 February 2012 05:54, gene heskett ghesk...@wdtv.com wrote: Obviously I have to use G92 to install the Z offset that compensates for the drill length, that is unavoidable from my reading. I have no lengths in my tool table since I'm using a drill chuck, making those lengths arbitrary and requiring I G38.2 to find this out after every tool change. I don't think that is obvious at all. In fact I think that G92 is the wrong way to do this, and the tool table is the right way. I would suggest that what you should do is use your probed length to set the tool-offset (G10 L1 or G10 L10, and G43) and use the hole-finding routine to set the coordinate system origin (G10 L2, or G10 L20) I'll look at that in the morning Andy, but I also posted an outline msg a couple hours later that sets up the G54-55-56 methods, and I believe that might be better since I could (theoretically, Murphy lives here drinks more of my beer than I do) recover the initial motion mapping just by reverting to G54. The purpose of G92 is mainly to put a duplicate shape somewhere else on a workpiece, as I understand it. The latest idea won't use it, turns out that G92 axis axis etc is entirely too promiscuous because on about the 30th read I finally understood that it was playing with axis's that weren't named on the line invoking it. It turns out that the G92.1 is only valid as a recovery means if that axis is first driven to exactly the same position it was in when the G92 axis was invoked, otherwise there is a cumulative error that attempts to drive the Z clear off the top of the post on about the 3rd usage in the middle of a 7 tool drill file. 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 Pray to God, but keep rowing to shore. -- Russian Proverb -- Try before you buy = See our experts in action! 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-dev2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Docs clarification needed.
On 6 February 2012 12:40, Erik Christiansen dva...@internode.on.net wrote: Gene, remembering your post about distaste for the tool table, Andy's opening sentence might put you off what seems a good suggestion, further down. Perhaps I should have been more clear that I was talking about the internal tool-length state rather than the tool file. Having said that, I use the tool table, but I never _edit_ the tool table. I use touch-off into the tool table which is an automated version of G10 Ln -- atp The idea that there is no such thing as objective truth is, quite simply, wrong. -- Try before you buy = See our experts in action! 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-dev2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Docs clarification needed.
On Monday, February 06, 2012 08:24:45 AM Erik Christiansen did opine: On 06.02.12 03:36, gene heskett wrote: On Monday, February 06, 2012 03:25:49 AM andy pugh did opine: I don't think that is obvious at all. In fact I think that G92 is the wrong way to do this, and the tool table is the right way. I would suggest that what you should do is use your probed length to set the tool-offset (G10 L1 or G10 L10, and G43) and use the hole-finding routine to set the coordinate system origin (G10 L2, or G10 L20) I'll look at that in the morning Andy, Gene, remembering your post about distaste for the tool table, Andy's opening sentence might put you off what seems a good suggestion, further down. Would G43.1 Dynamic tool compensation be the neatest way out of the tool length problem? If you provide it directly with your probed length as Andy suggests, then there is no need to go near the tool table. In fact, reading up on G43.1-G49 stuff, it might do what I need to do to the tool length problem. I am slightly put off by its Z and/or X only abilities, but reading on down to G49 seems to be a way to cancel it before probing for the next one. If this would prevent the corrections from being additive, it could well solve the problem. It is tool lengths and the X offsets for the bottom of the board that need to be fixed. And if anyone can say whether the Xn Yn ... Wn list is really any different from axes, as used elsewhere in the doco, then that'd help the grammar documenting exercise too. ;-) As I read that, on the development wiki's html pages right now at: http://www.linuxcnc.org/docs/devel/html/gcode/gcode.html#_g43_1_dynamic_tool_length_offset_a_id_sec_g43_1_dynamic_tool_length_offset_a I would at first interpret that to mean any of the named axes. If in fact there restrictions such as the offsetting the Z and/or X offsets as stated in the G43.1 so that Y(A/B/C/U/V/W) can't be diddled, then the docs do need to state that more explicitly for each, globally throughout the docs. In my instant case, I should not need, as long as my pallet is aligned (and its now constrained by the T slot in the table), to diddle the Y anyway. That would be the perfect world because that reference hole was drilled at precisely Y0.1 offset from its originally HOME'd position, and should remain there when the board is flipped remounted in the pallet. Does that perfect world exist? Chuckle. Dontbesilly, OTOH a thou isn't going to be a showstopper. 10 thou now, would be. So I'm off to write some code. Done, waiting on sugar to go down enough to eat a few more degrees of warming outside. I think I now have something that will work. 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 If you are over 80 years old and accompanied by your parents, we will cash your check. -- Try before you buy = See our experts in action! 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-dev2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Docs clarification needed.
On Tuesday, February 07, 2012 01:14:47 AM andy pugh did opine: On 6 February 2012 12:40, Erik Christiansen dva...@internode.on.net wrote: Gene, remembering your post about distaste for the tool table, Andy's opening sentence might put you off what seems a good suggestion, further down. Perhaps I should have been more clear that I was talking about the internal tool-length state rather than the tool file. Having said that, I use the tool table, but I never _edit_ the tool table. I use touch-off into the tool table which is an automated version of G10 Ln Late reply, sorry. Been carving code nursing my back. I have it about 80% working, and it looks like it will in fact work well. But I separated the TLO function and the top/bottom offset function, using G43.1 z# to apply the TLO, then for the X offset, setting G10 L2 p2 #result from hole probe, then switching to the G55 co-ordinate system to do the bottom side work. I say about 80% because I need to find some carbide drill bits in suitable sizes because an HSS drill bit seems only capable of drilling about 10 holes halfway through the board without getting so dull the copper is burred up for 5 thou around the hole. Topping that off, I used a deicer repair kit to add some robustness to the registration hole, which worked well, but when I was working on the same function for the bottom of the board, a ^% typu drug the probe sideways about 20 thou, wrecking the hole. The rest of the board looks well once the burrs were polished away, so I've set the G54-55 stuff up, and left it running, and will see if I can iso-etch the bottom tomorrow and have one usable board. I have more pcb material I can cut, but I'll have to find some more better drills to do any more of them. For stuff like this, it seems I should just buy an index of #10 to #70 carbide drills, but so far all I have found in the catalogs are TiN HSS stuff. Anybody here know of a supplier for carbide drills in teeny wire sizes? 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 One picture is worth more than ten thousand words. -- Chinese proverb -- 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] Docs clarification needed.
Gene- Precise Bits has a good selection of tiny drills and endmills:http://www.precisebits.com/products/carbidebits/drills.asp?tsPT=wire. These guys sell resharpened bits at an attractive price: http://drillcity.stores.yahoo.net/index.html . Also, I recently found an assortment of 10 microdrills at Harbor Freight for $5. -Greg From: gene heskett ghesk...@wdtv.com To: emc-users@lists.sourceforge.net Sent: Tuesday, February 7, 2012 12:31 AM Subject: Re: [Emc-users] Docs clarification needed. On Tuesday, February 07, 2012 01:14:47 AM andy pugh did opine: On 6 February 2012 12:40, Erik Christiansen dva...@internode.on.net wrote: Gene, remembering your post about distaste for the tool table, Andy's opening sentence might put you off what seems a good suggestion, further down. Perhaps I should have been more clear that I was talking about the internal tool-length state rather than the tool file. Having said that, I use the tool table, but I never _edit_ the tool table. I use touch-off into the tool table which is an automated version of G10 Ln Late reply, sorry. Been carving code nursing my back. I have it about 80% working, and it looks like it will in fact work well. But I separated the TLO function and the top/bottom offset function, using G43.1 z# to apply the TLO, then for the X offset, setting G10 L2 p2 #result from hole probe, then switching to the G55 co-ordinate system to do the bottom side work. I say about 80% because I need to find some carbide drill bits in suitable sizes because an HSS drill bit seems only capable of drilling about 10 holes halfway through the board without getting so dull the copper is burred up for 5 thou around the hole. Topping that off, I used a deicer repair kit to add some robustness to the registration hole, which worked well, but when I was working on the same function for the bottom of the board, a ^% typu drug the probe sideways about 20 thou, wrecking the hole. The rest of the board looks well once the burrs were polished away, so I've set the G54-55 stuff up, and left it running, and will see if I can iso-etch the bottom tomorrow and have one usable board. I have more pcb material I can cut, but I'll have to find some more better drills to do any more of them. For stuff like this, it seems I should just buy an index of #10 to #70 carbide drills, but so far all I have found in the catalogs are TiN HSS stuff. Anybody here know of a supplier for carbide drills in teeny wire sizes? 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 One picture is worth more than ten thousand words. -- Chinese proverb -- 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 -- 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
[Emc-users] Docs clarification needed.
Greetings Guys; 2 questions actually: 1. What is the schedule saying about the renaming of this list to linuxcnc-users@etc? 2. I apparently am having trouble understanding the G92 family docs, which state: G92 makes the current point have the coordinates you want (without motion), where the axis words contain the axis numbers you want. All axis words are optional, except that at least one must be used. If an axis word is not used for a given axis, the coordinate on that axis of the current point is not changed. When G92 is executed, the origins of all coordinate systems move. They move such that the value of the current controlled point, in the currently active coordinate system, becomes the specified value. All coordinate system’s origins are offset this same distance. For example, suppose the current point is at X=4 and there is currently no G92 offset active. Then G92 x7 is programmed. This moves all origins -3 in X, which causes the current point to become X=7. This -3 is saved in parameter 5211. Being in incremental distance mode has no effect on the action of G92. G92 offsets may be already be in effect when the G92 is called. If this is the case, the offset is replaced with a new offset that makes the current point become the specified value. It is an error if: all axis words are omitted. LinuxCNC stores the G92 offsets and reuses them on the next run of a program. To prevent this, one can program a G92.1 (to erase them), or program a G92.2 (to remove them - they are still stored). Ok Then: G92.1 - reset axis offsets to zero and set parameters 5211 - 5219 to zero. G92.2 - reset axis offsets to zero. G93.3 Restore Axis Offsets G93.3 - set the axis offset to the values saved in parameters 5211 to 5219 You can set axis offsets in one program and use the same offsets in another program. Program G92 in the first program. This will set parameters 5211 to 5219. Do not use G92.1 in the remainder of the first program. The parameter values will be saved when the first program exits and restored when the second one starts up. Use G92.3 near the beginning of the second program. That will restore the offsets saved in the first program. That seems to intimate that using a G92 axis number not only stores the desired position in the axis named, but also stores the rest of the axis positions in 5211-5219. What I am trying to do is add some position offsets on a per axis basis, but if a G92 actually updates all axis's to the current location except the one named in the G92 command, then the subsequent execution of a g92.1 it seems is restoring bogus numbers, as is evidenced when a new home operation is done, the z reading of 4.0681 doesn't revert to 0.. So, assuming the machine is sitting about .040 above my little brass tube I set in the pallet, nominally at X-0.3 Y+0.2, where I run holefinder.ngc in order to locate the precise location that brass contact within half a thou both ways. This routine uses G38.2 a total of five times, and sets #100 to the real X location, and #101 to the real Y location. I then use those #vars to move the machine to a position that is X-0.100, y0.000 from what should be the boards left front corner, and home x and y there. Then I raise it far enough to change out the drill chuck holding the conical tipped metal probe out for a collet and a 1/8 shank engraving bit, which raises the effective tool tip by about 4 since the collet is that much shorter than the drill chuck when its mounted,about 0.1 and run it down slowly with the down key until the bit contacts the pcb triggering the stop during a jog function. At that point, I home the Z. Its a bit abitrary as I do that same G38.2 once in the otedautoz call and use G92 Z to install a very small offset, a thou or less, in Z so I can fine tune the depth of the engraving done in the top.etch file. Now, in the remainder of the files, 4 more to complete the board, and at the present I am using the holefinder to locate a hole drilled in the board, which when the board is turned end for end, is used to install the offset value into the x so that the etch and bot.drill will result in the drill bit tips exactly meeting in the center of each hole. I know I will have to break this holefinder into 2 files since I don't want to muck with the Y location when running it the second time. Obviously I have to use G92 to install the Z offset that compensates for the drill length, that is unavoidable from my reading. I have no lengths in my tool table since I'm using a drill chuck, making those lengths arbitrary and requiring I G38.2 to find this out after every tool change. So what is the sequence of G9X's I must use in the remaining 5 files it takes to complete a board?, and which will not result in the machine moving its Z zero up in the air, both in axis
