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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Dental X-ray machine
Anyone here know anything about dental X-Ray machines? I have a few questions on a Phillips ORALIX 65 unit. Any help would be much appreciated. Thanks, AL |
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Dental X-ray machine
"Al A." wrote in message
... Anyone here know anything about dental X-Ray machines? I have a few questions on a Phillips ORALIX 65 unit. Any help would be much appreciated. Thanks, AL I only know one thing about them - they're bloody dangerous! I really hope you know what you're doing! Tom |
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Dental X-ray machine
Yea..... they are used by dentists who know what they are doing, know how to
properly operate the machine and know how to observe proper safety procedures to take dental x-rays...... ......... what else did you what to know? ---------------- "Al A." wrote in message ... Anyone here know anything about dental X-Ray machines? I have a few questions on a Phillips ORALIX 65 unit. Any help would be much appreciated. Thanks, AL |
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Dental X-ray machine
Suggest that you get the appropriate service information and are properly
trained before even attempting to enter the case. Otherwise have a factory trained technician service it for you. Safety first, learn at your own expense but not in a way to jeopardize your life. . "Sofie" wrote in message ... Yea..... they are used by dentists who know what they are doing, know how to properly operate the machine and know how to observe proper safety procedures to take dental x-rays...... ........ what else did you what to know? ---------------- "Al A." wrote in message ... Anyone here know anything about dental X-Ray machines? I have a few questions on a Phillips ORALIX 65 unit. Any help would be much appreciated. Thanks, AL |
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Dental X-ray machine
"Al A." wrote in message
... Anyone here know anything about dental X-Ray machines? I have a few questions on a Phillips ORALIX 65 unit. Every X-Ray device I've ever seen uses very high voltages; 10-30KV is not atypical. There's a very fundamental High Voltage Service Rule: Always keep one hand in your back pocket. That way you can't unintentionally provide a direct path to ground from your other hand. Norm |
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Dental X-ray machine
"Al A." wrote in message
... Anyone here know anything about dental X-Ray machines? I have a few questions on a Phillips ORALIX 65 unit. It's a 65kV (obviously!) machine, IIRC it has an 'oral technique' timer which sets the exposure time according to oral position and film speed. You won't get anywhere near the 65kV, unless you can get inside the head unit which contains the tube and mains transformer. Check that any exposed metal on the head is well grounded, for electrical (supply) safety. |
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Dental X-ray machine
On Tue, 15 Jun 2004 10:53:18 -0700, "Sofie" wrote:
Yea..... they are used by dentists who know what they are doing, know how to properly operate the machine and know how to observe proper safety procedures to take dental x-rays...... ........ what else did you what to know? ---------------- Yes, I know all of that. As a matter of fact, I am working on this for a dentist who is going to bring it to a village in a shockingly poor part of the world, in order to provide dental care a few times a year to a place where the last time there was any medical or dental care was nearly 7 years ago. He does this strictly on donated money, and at great personal risk and cost. I am trying to help him out. I have no intention of taking any dental X rays, nor did I indicate any intent to do so. I am converting this to be a portable unit (it was an "office mobile" type, this is the third conversion I have done.) so that it can be gotten there. Part of the trip is via canoe, and most of the rest is via a beatup old 4WD truck, up some very treacherous mountain roads, accompianied by armed guards. It will be run by generator. I have been an electrical engineer for over 20 years. I design ,build and service (12KV, 20KW) power supplies for electron beam vapor deposition systems, and ion beam guns. If you fear for my safety, I appreciate your concern, but please don't. I have a mom and a wife for that. I have several question concerning the type and amount of transformer oil that is used in the head of one of these units. If anyone here has, and is willing to offer, any specific knowledge about this unit, I would much appreciate your assistance, it will be used to help people who are truly in need. If you have only to offer snide remarks like the one above, please don't waste your time on me. I am not worth the effort, I assure you. Thank you, AL |
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Dental X-ray machine
On Tue, 15 Jun 2004 15:20:47 -0400, "Art" wrote:
Suggest that you get the appropriate service information and are properly trained before even attempting to enter the case. Otherwise have a factory trained technician service it for you. Safety first, learn at your own expense but not in a way to jeopardize your life. . Thanks, Art. I do know enough to not get hurt, nor endanger anyone else. (see my follow up posting to another reply I got) I was just curious if there was anyone here who had some specific knowledge about this unit. I was wondering as to how one determines the correct oil level in the head of the unit. I think it is OK, as the unit was working when it was taken out of service, but it is going a long way from here, and I want to double check. Thanks for the rational reply, it is much appreciated. -AL |
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Dental X-ray machine
On Tue, 15 Jun 2004 10:53:18 -0700, "Sofie" wrote:
Yea..... they are used by dentists who know what they are doing, know how to properly operate the machine and know how to observe proper safety procedures to take dental x-rays...... ........ what else did you what to know? ---------------- Yes, I know all of that. As a matter of fact, I am working on this for a dentist who is going to bring it to a village in a shockingly poor part of the world, in order to provide dental care a few times a year to a place where the last time there was any medical or dental care was nearly 7 years ago. He does this strictly on donated money, and at great personal risk and cost. I am trying to help him out. I have no intention of taking any dental X rays, nor did I indicate any intent to do so. I am converting this to be a portable unit (it was an "office mobile" type, this is the third conversion I have done.) so that it can be gotten there. Part of the trip is via canoe, and most of the rest is via a beatup old 4WD truck, up some very treacherous mountain roads, accompianied by armed guards. It will be run by generator. I have been an electrical engineer for over 20 years. I design ,build and service (12KV, 20KW) power supplies for electron beam vapor deposition systems, and ion beam guns. If you fear for my safety, I appreciate your concern, but please don't. I have a mom and a wife for that. I have several question concerning the type and amount of transformer oil that is used in the head of one of these units. If anyone here has, and is willing to offer, any specific knowledge about this unit, I would much appreciate your assistance, it will be used to help people who are truly in need. If you have only to offer snide remarks like the one above, please don't waste your time on me. I am not worth the effort, I assure you. Thank you, AL |
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Dental X-ray machine
Al A:
Sorry that I offended you with my "snide" remark.... it is an unfortunate result of spending too many hours on newsgroups trying to determine how to reply to the various types of requests for repair suggestions. If you would have first posted the subsequent information that you did in your follow up postings I would have offered more constructive comments and suggestions, but the way that your original post was written made it seem apparent to me that you were an inexperienced novice with a new "toy" that you might have picked up at a garage sale or surplus sale. On the newsgroups we get all kinds of crazy requests from newbies for help fixing Microwave ovens, televisions, and other quite dangerous and deadly home consumer devices that can otherwise be very safe is operated properly and safety interlocks and covers are left in place. As I am certain that you agree, these types of devices, including dental x-ray machines should only be opened up and serviced by somewhat knowledgeable individuals. Yes, your safety and the safety of others around you was my prime concern. I trust that you will get the information you require for this worthwhile endeavor with your dentist friend. -- Best Regards, Daniel Sofie Electronics Supply & Repair - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - "Al A." wrote in message On Tue, 15 Jun 2004 10:53:18 -0700, "Sofie" wrote: Yea..... they are used by dentists who know what they are doing, know how to properly operate the machine and know how to observe proper safety procedures to take dental x-rays...... ........ what else did you what to know? ---------------- Yes, I know all of that. If you have only to offer snide remarks like the one above, please don't waste your time on me. I am not worth the effort, I assure you. Thank you, AL |
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Dental X-ray machine
Sir, I appreciate your apology, it is big of you to offer it. You are correct, I should have been a bit more specific and offered a bit more info in my original posting. My error. I guess I must also admit I may have been in a bit of a "mood" when I replied. Hope that you took no offense, I really should not have assumed you where being snide. If my reply came off as rude, please accept my apology. As someone who, like yourself, is called upon to defeat all of those saftey interlocks and whatnot, just to do my job, I fully appreciate the problem of being asked for advice from people who are not qualified to saftely do the things they are asking about. Happens to me all of the time. And I sometimes give advice similar to what you gave me. I should have recognized it. I know well the issues involved with newsgroup replies. Thanks for taking the time to reply. No bad feelings I hope. BTW, click the link below, and if you look closely, you can see one of my other "converted" Xray machines in use in Papua New Guinea: http://www.gracedentalmission.org/Mi...apua/PNG11.htm I wa s modified to mount on a heavy duty camera tripod, and the whole unit packs up into a fairly small suitcase type thing for transport. hanks again, -AL On Wed, 16 Jun 2004 08:31:04 -0700, "sofie" wrote: Al A: Sorry that I offended you with my "snide" remark.... it is an unfortunate result of spending too many hours on newsgroups trying to determine how to reply to the various types of requests for repair suggestions. If you would have first posted the subsequent information that you did in your follow up postings I would have offered more constructive comments and suggestions, but the way that your original post was written made it seem apparent to me that you were an inexperienced novice with a new "toy" that you might have picked up at a garage sale or surplus sale. On the newsgroups we get all kinds of crazy requests from newbies for help fixing Microwave ovens, televisions, and other quite dangerous and deadly home consumer devices that can otherwise be very safe is operated properly and safety interlocks and covers are left in place. As I am certain that you agree, these types of devices, including dental x-ray machines should only be opened up and serviced by somewhat knowledgeable individuals. Yes, your safety and the safety of others around you was my prime concern. I trust that you will get the information you require for this worthwhile endeavor with your dentist friend. |
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Dental X-ray machine
"Al A." wrote in message ... Anyone here know anything about dental X-Ray machines? I have a few questions on a Phillips ORALIX 65 unit. Any help would be much appreciated. Thanks, AL Yes as soon as they are switched on your dental bill doubles!! English joke, what do the call dentists in America? answer Dennis |
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Dental X-ray machine
On Tue, 15 Jun 2004 23:34:29 GMT Al A. wrote:
I have several question concerning the type and amount of transformer oil that is used in the head of one of these units. I don't know anything about that unit specifically, but if you want info on transformer oil I suggest you try to get the data sheets on Shell Dialla and Dialla AX. I believe these are the 2 most commonly marketed transformer oils in the US, and they are often used in voltage ranges much higher than this. In general, such transformers should not be completely filled (so that there is air to act as something compressible when the oil gets warm and expands), and the oil chamber should be sealed (so that moisture can't get in.) - ----------------------------------------------- Jim Adney Madison, WI 53711 USA ----------------------------------------------- |
#15
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Dental X-ray machine
On Tue, 15 Jun 2004 21:20:05 GMT "Norm Dresner" wrote:
Every X-Ray device I've ever seen uses very high voltages; 10-30KV is not atypical. A 30 keV X-ray is almost too weak to get out of the X-ray tube. Medical X-ray machines run from 60 to 200 kV. There's a very fundamental High Voltage Service Rule: Always keep one hand in your back pocket. I'm afraid that such a rule is really no help at all at truly high voltages. At voltages like this you will still get nailed right thru your shoes to a concrete floor. The only safe way to work on them is by making SURE they are off and completely discharged. - ----------------------------------------------- Jim Adney Madison, WI 53711 USA ----------------------------------------------- |
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