milling machine
What do you think guys, maybe this one is
a good choice? https://www.youtube.com/watch?v=jML8nVSntuE :) -- underground experts united http://user.it.uu.se/~embe8573 |
milling machine
On Mon, 19 Mar 2018 00:35:20 +0100, Emanuel Berg
wrote: What do you think guys, maybe this one is a good choice? https://www.youtube.com/watch?v=jML8nVSntuE :) The beginning scenes - no loose clothing, no rings or wris****ch, etc. is good advice. I once worked with a guy that caught a ring on something when he jumped down out of the bomb bay and tore the skin off the back of his finger. Just pealed off a strip all the way from the base of his finger to the fingernail. An Electrician, working on the same airplane shorted out the main battery bank with his wedding ring. Melted the gold ring right off his finger (that didn't do the finger any good either) As a young Airman those experiences convinced me that jewelry and working are a poor combination and even today I automatically remove rings and watches when going to work. -- Cheers, John B. |
milling machine
John B. wrote:
The beginning scenes - no loose clothing, no rings or wris****ch, etc. is good advice. I once worked with a guy that caught a ring on something when he jumped down out of the bomb bay and tore the skin off the back of his finger. Just pealed off a strip all the way from the base of his finger to the fingernail. An Electrician, working on the same airplane shorted out the main battery bank with his wedding ring. Melted the gold ring right off his finger (that didn't do the finger any good either) As a young Airman those experiences convinced me that jewelry and working are a poor combination and even today I automatically remove rings and watches when going to work. Yep. I like the name of the brand - Luna - because I can't think of anything cooler than to have your own base on the Moon :) Well, maybe a time machine/battlecruiser/science vessel/spaceship all in one... -- underground experts united http://user.it.uu.se/~embe8573 |
milling machine
On 3/18/2018 8:08 PM, John B. wrote:
On Mon, 19 Mar 2018 00:35:20 +0100, Emanuel Berg wrote: What do you think guys, maybe this one is a good choice? https://www.youtube.com/watch?v=jML8nVSntuE :) The beginning scenes - no loose clothing, no rings or wris****ch, etc. is good advice. I once worked with a guy that caught a ring on something when he jumped down out of the bomb bay and tore the skin off the back of his finger. Just pealed off a strip all the way from the base of his finger to the fingernail. An Electrician, working on the same airplane shorted out the main battery bank with his wedding ring. Melted the gold ring right off his finger (that didn't do the finger any good either) As a young Airman those experiences convinced me that jewelry and working are a poor combination and even today I automatically remove rings and watches when going to work. I know of a trade school that had its carpentry students building a house, that the school later sold as a fund raiser. I was told that one long-haired student was on the 2nd floor, drilling holes for wiring through the studs in the naked stud walls. He leaned over as he drilled, and his long hair wrapped around the chuck of the drill. The drill pulled his head down fast enough that he knocked his head on the drill, then fell through the open stud space. He was rescued while hanging by his hair about 8 feet above the ground. -- - Frank Krygowski |
milling machine
On Mon, 19 Mar 2018 00:35:20 +0100, Emanuel Berg
wrote: What do you think guys, maybe this one is a good choice? https://www.youtube.com/watch?v=jML8nVSntuE A good choice for doing what? If you're thinking of buying a mill, either get one with servo drives, or one that is easily converted to CNC by adding servo drives. (I don't like steppers). CNC makes things much easier. That also means ball screws for the table. If the machine is sloppy when operated manually, it will still be sloppy when driven by a computah. As for the safety lecture, it's all good advice. I would roll up my sleeves, or use a velcro strap to keep them in place. The only real accident I can recall was getting a sleeve caught in an industrial sewing machine. Also, if you're using coolant, you'll never be able to keep the machines as clean as the one in the video. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
milling machine
On Sun, 18 Mar 2018 21:14:30 -0700, Jeff Liebermann
wrote: If you're thinking of buying a mill, either get one with servo drives, or one that is easily converted to CNC by adding servo drives. (I don't like steppers). CNC makes things much easier. I'm currently helping a friend with this CNC mill conversion: http://www.learnbydestroying.com/jeffl/pics/CNC-conversion/index.html -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
milling machine
On Sun, 18 Mar 2018 22:36:32 -0400, Frank Krygowski
wrote: On 3/18/2018 8:08 PM, John B. wrote: On Mon, 19 Mar 2018 00:35:20 +0100, Emanuel Berg wrote: What do you think guys, maybe this one is a good choice? https://www.youtube.com/watch?v=jML8nVSntuE :) The beginning scenes - no loose clothing, no rings or wris****ch, etc. is good advice. I once worked with a guy that caught a ring on something when he jumped down out of the bomb bay and tore the skin off the back of his finger. Just pealed off a strip all the way from the base of his finger to the fingernail. An Electrician, working on the same airplane shorted out the main battery bank with his wedding ring. Melted the gold ring right off his finger (that didn't do the finger any good either) As a young Airman those experiences convinced me that jewelry and working are a poor combination and even today I automatically remove rings and watches when going to work. I know of a trade school that had its carpentry students building a house, that the school later sold as a fund raiser. I was told that one long-haired student was on the 2nd floor, drilling holes for wiring through the studs in the naked stud walls. He leaned over as he drilled, and his long hair wrapped around the chuck of the drill. The drill pulled his head down fast enough that he knocked his head on the drill, then fell through the open stud space. He was rescued while hanging by his hair about 8 feet above the ground. Depending on how much hair the drill grabbed I would have expected to find the guy on the floor with a nasty red place on his scalp where the hair got pulled out :-) When I was in the A.F. they were almost fanatical about safety. You could actually be demoted for failure to comply with the safety manual. When I retired and went to work for a civilian company I found that while they gave lip service to safety they were actually far more lax then the A.F. -- Cheers, John B. |
milling machine
On Sun, 18 Mar 2018 21:14:30 -0700, Jeff Liebermann
wrote: On Mon, 19 Mar 2018 00:35:20 +0100, Emanuel Berg wrote: What do you think guys, maybe this one is a good choice? https://www.youtube.com/watch?v=jML8nVSntuE A good choice for doing what? If you're thinking of buying a mill, either get one with servo drives, or one that is easily converted to CNC by adding servo drives. (I don't like steppers). CNC makes things much easier. That also means ball screws for the table. If the machine is sloppy when operated manually, it will still be sloppy when driven by a computah. Out of curiosity what do you reckon it will cost to convert a milling machine to CNC? Replacing the feed screws with ball screws, installing servos or stepper motors, the computer installation, etc.? As for the safety lecture, it's all good advice. I would roll up my sleeves, or use a velcro strap to keep them in place. The only real accident I can recall was getting a sleeve caught in an industrial sewing machine. Also, if you're using coolant, you'll never be able to keep the machines as clean as the one in the video. -- Cheers, John B. |
milling machine
On Mon, 19 Mar 2018 12:47:21 +0700, John B.
wrote: Out of curiosity what do you reckon it will cost to convert a milling machine to CNC? Replacing the feed screws with ball screws, installing servos or stepper motors, the computer installation, etc.? Some photos: http://www.learnbydestroying.com/jeffl/pics/CNC-conversion/index.html Badly half done web page: http://www.learnbydestroying.com/jeffl/CNC%20Conversion%20Project/CNC.html Link to docs, manuals, and details: https://drive.google.com/drive/folders/1B_FtnU1LHjr0O7aoJoUVwbGOQRujyNnC?usp=sharing I can get you the exact specs, prices, and sources (later) when I find where I buried my notebooks. There are kits available that are essentially plug and play conversions for well known mills, such as Bridgeports. If the mill doesn't have ball screws, you'll need a conversion kit for $1,000 to $1,500. The Shizuoka ST-N mill already has ball screws, so this was not needed. So far, we have about $1,600 into the controller, 3 drivers, 3 servos, and 3 added servo brakes. The servos are the biggest available. We only have one phase 220VAC power available, so add in a phase converter for the spindle motor for about $150 to $400 depending on power. We also need to add 5 inductive limit switches at about $20/ea. I get the fun job of rewiring the machine with new wires, flex conduit, relays, and sockets (coolant, tool changer, etc) for about $15/ea. My guess is about 8 relays and who knows how much wire. I'm also adding a 24V 6A DC power supply to run the brakes and relays. I have some of these, but my guess is about $50 for a decent switcher. Grand total should be under $2,500. Prior to going the do it thyself route, we received estimates for complete systems, that started at about $10,000. We made a huge mistake by purchasing the various components from different vendors in order to save money. Despite my demands that the owner obtain the manuals on everything before purchasing, the owner decided he was in a hurry. All the manuals are in either Chinese or a bad Google translation of Chinese into English. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
milling machine
On Sun, 18 Mar 2018 23:34:39 -0700, Jeff Liebermann
wrote: On Mon, 19 Mar 2018 12:47:21 +0700, John B. wrote: Out of curiosity what do you reckon it will cost to convert a milling machine to CNC? Replacing the feed screws with ball screws, installing servos or stepper motors, the computer installation, etc.? Some photos: http://www.learnbydestroying.com/jeffl/pics/CNC-conversion/index.html Badly half done web page: http://www.learnbydestroying.com/jeffl/CNC%20Conversion%20Project/CNC.html Link to docs, manuals, and details: https://drive.google.com/drive/folders/1B_FtnU1LHjr0O7aoJoUVwbGOQRujyNnC?usp=sharing I can get you the exact specs, prices, and sources (later) when I find where I buried my notebooks. There are kits available that are essentially plug and play conversions for well known mills, such as Bridgeports. If the mill doesn't have ball screws, you'll need a conversion kit for $1,000 to $1,500. The Shizuoka ST-N mill already has ball screws, so this was not needed. So far, we have about $1,600 into the controller, 3 drivers, 3 servos, and 3 added servo brakes. The servos are the biggest available. We only have one phase 220VAC power available, so add in a phase converter for the spindle motor for about $150 to $400 depending on power. We also need to add 5 inductive limit switches at about $20/ea. I get the fun job of rewiring the machine with new wires, flex conduit, relays, and sockets (coolant, tool changer, etc) for about $15/ea. My guess is about 8 relays and who knows how much wire. I'm also adding a 24V 6A DC power supply to run the brakes and relays. I have some of these, but my guess is about $50 for a decent switcher. Grand total should be under $2,500. Prior to going the do it thyself route, we received estimates for complete systems, that started at about $10,000. We made a huge mistake by purchasing the various components from different vendors in order to save money. Despite my demands that the owner obtain the manuals on everything before purchasing, the owner decided he was in a hurry. All the manuals are in either Chinese or a bad Google translation of Chinese into English. To be honest I can't think of anything I ever did on a horizontal or vertical milling machine that would have benefited by having CNC :-) A lathe, yes, if only turning the balls to put on the ends of a vise handle, but all the milling I can remember doing was pretty much straight cuts. What does the guy plan on doing with the mill? -- Cheers, John B. |
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