sir sanders zingmore 11,988 Posted September 16, 2013 Share Posted September 16, 2013 Sometimes speculation can yield solutions previously not considered... Speculate away I say! Cheers M Blue Horseshoe loves Anacott Steel..... 1 Link to post Share on other sites
LogicprObe 7,633 Posted September 16, 2013 Share Posted September 16, 2013 Speaking of weird stuff....................check this out. Link to post Share on other sites
sir sanders zingmore 11,988 Posted September 16, 2013 Share Posted September 16, 2013 Speaking of weird stuff....................check this out. Bloody eddy currents Link to post Share on other sites
Once Analog 153 Posted September 17, 2013 Share Posted September 17, 2013 I have received Michael's Luxman PD350, hoping to get started on it tomorrow. Will keep you informed on the progress, bringing this beautiful turntable back to life again. Vince 1 Link to post Share on other sites
andyr 5,749 Posted September 17, 2013 Share Posted September 17, 2013 I have received Michael's Luxman PD350, hoping to get started on it tomorrow. Will keep you informed on the progress, bringing this beautiful turntable back to life again. Vince Good onya, Vince. We're all waiting to get your report. Regards, Andy Link to post Share on other sites
lovetube 657 Posted September 17, 2013 Share Posted September 17, 2013 I have received Michael's Luxman PD350, hoping to get started on it tomorrow. Will keep you informed on the progress, bringing this beautiful turntable back to life again. Vince Good luck Vince regards Duc Link to post Share on other sites
Once Analog 153 Posted September 17, 2013 Share Posted September 17, 2013 Hi all, "Is there a TT bearing expert in Vic? My Luxman beckons"! Hmm, I don't know, heard of a guy that lives in Nowra, NSW, (think his name is Vince)? Was told, he not only repairs turntable bearings, but also designs and builds his own, might be worth a try! Link to post Share on other sites
Once Analog 153 Posted September 18, 2013 Share Posted September 18, 2013 (edited) Without the platter on, the problem never occurs.I'm not surprised, on my scale the platter weighs 9.665kg. a turntable to be reckon with!Vince Edited September 18, 2013 by Once Analog Link to post Share on other sites
andyr 5,749 Posted September 18, 2013 Share Posted September 18, 2013 I'm not surprised, on my scale the platter weighs 9.665kg. Vince Wow!! Huge! :eek: Andy Link to post Share on other sites
Once Analog 153 Posted September 18, 2013 Share Posted September 18, 2013 Luxman PD350 Bearing Evaluation: The bearing housing appears to be made of Brass. It's a "through" sleeve, (meaning the same diameter measurement the full length). Contact area top and bottom measured .3940" exact! The spindle contact area top and bottom measured .3933" exact! Therefore the clearance is .0007" in my view PERFECT! There was an undercut area on the spindle which measured .381" of some 27mm to allow for extra oil. No sign of sideway force wear, correct belt length. The "Ball" 7mm/.2756" showed no sign of flat spots! I feel safe in saying, the bearing is NOT the problem. The evaluation continues....... Vince Link to post Share on other sites
Upfront 1,954 Posted September 18, 2013 Share Posted September 18, 2013 Any chance of some photos under the hood so to speak Vince? Linc 1 Link to post Share on other sites
Once Analog 153 Posted September 18, 2013 Share Posted September 18, 2013 (edited) Any chance of some photos under the hood so to speak Vince?LincCertainly, was planning on pictures, have taken a few with my iPhone, but don't know how to upload to SNA? Will sort it, expect some tomorrow. Edited September 18, 2013 by Once Analog Link to post Share on other sites
Upfront 1,954 Posted September 18, 2013 Share Posted September 18, 2013 Certainly, was planning on pictures, have taken a few with my iPhone, but don't know how to upload to SNA? Will sort it, expect some tomorrow. Thanks Vince. Link to post Share on other sites
andyr 5,749 Posted September 18, 2013 Share Posted September 18, 2013 Luxman PD350 Bearing Evaluation: The bearing housing appears to be made of Brass. It's a "through" sleeve, (meaning the same diameter measurement the full length). Contact area top and bottom measured .3940" exact! The spindle contact area top and bottom measured .3933" exact! Therefore the clearance is .0007" in my view PERFECT! There was an undercut area on the spindle which measured .381" of some 27mm to allow for extra oil. No sign of sideway force wear, correct belt length. The "Ball" 7mm/.2756" showed no sign of flat spots! I feel safe in saying, the bearing is NOT the problem. The evaluation continues....... Vince Did it look like it had been full of oil? Andy Link to post Share on other sites
Once Analog 153 Posted September 18, 2013 Share Posted September 18, 2013 Did it look like it had been full of oil? Andy Yes, very dirty, but plenty. Vince Link to post Share on other sites
Addicted to music 7,112 Posted September 18, 2013 Share Posted September 18, 2013 Certainly, was planning on pictures, have taken a few with my iPhone, but don't know how to upload to SNA? Will sort it, expect some tomorrow. Hi Vince, If you get onto SNA via Safari on the iPhone, where you see the "Post" icon there is a "More reply Option". If you tap onto the "More reply Option" there will be a dropped down menu " Attached Files". In the Attached Files there is a "Choose File". If tap onto "Choose Files" 3 options will come up; "take photo or video" "Choose Existing" and "cancel". These are self explanatory, so once you have done that you have to tap "Attached the file" ion in the SNA site, this will upload the pics onto the post. Once you have done that you then tap Post icon like you normally post. Hope this helps! Link to post Share on other sites
Addicted to music 7,112 Posted September 18, 2013 Share Posted September 18, 2013 BTW, I hate brass sleeve housings..... Link to post Share on other sites
unclemack 3,299 Posted September 18, 2013 Author Share Posted September 18, 2013 Damn. I was (perversely) hoping for a problem with the bearing. Still a mystery then. Thanks Vince. Cheers. M Link to post Share on other sites
Once Analog 153 Posted September 18, 2013 Share Posted September 18, 2013 Hi Vince, If you get onto SNA via Safari on the iPhone, where you see the "Post" icon there is a "More reply Option". If you tap onto the "More reply Option" there will be a dropped down menu " Attached Files". In the Attached Files there is a "Choose File". If tap onto "Choose Files" 3 options will come up; "take photo or video" "Choose Existing" and "cancel". These are self explanatory, so once you have done that you have to tap "Attached the file" ion in the SNA site, this will upload the pics onto the post. Once you have done that you then tap Post icon like you normally post. Hope this helps! Thank you Pchan, I will give it a try later today. Meanwhile, it's back in the shed, we need to get the Luxman up and running properly, UM is without his vinyl! Vince Link to post Share on other sites
Once Analog 153 Posted September 19, 2013 Share Posted September 19, 2013 (edited) Luxman PD350 Bearing Avaluation Soaked the bearing components overnight in Alcohol. This morning, cleaned and assembled the bearing and also the motor pulley/drive belt and outer side platter. Substituted an oil lube with a full synthetic Teflon "light" grease, that will not thicken or thin regardless of temperature! The Luxman has been up and running since 9.45am this morning, both 33/45RPM speeds stable, no fluctuation! Still suspicious, the Luxman with it's perfect bearing measurements, might be trying to trick me? No chance of that, when the Luxman leaves here, the cavity WILL be filled! Will leave her running overnight. Vince Edited September 19, 2013 by Once Analog 1 Link to post Share on other sites
Once Analog 153 Posted September 19, 2013 Share Posted September 19, 2013 Hmm, 9 hours running time and both 33/45RPM still stable, no fluctuation? Vince 1 Link to post Share on other sites
Upfront 1,954 Posted September 19, 2013 Share Posted September 19, 2013 Nice work mate. Can't believe that may have been all it was. Link to post Share on other sites
andyr 5,749 Posted September 19, 2013 Share Posted September 19, 2013 Well done. maybe you need to get some whale oil for the bearing? Andy Link to post Share on other sites
soundfan 9,077 Posted September 19, 2013 Share Posted September 19, 2013 Nice work mate. Can't believe that may have been all it was. Have I missed something here? I thought Vince was posting that he feels he can eliminate the bearing being the problem. Tell me more. Link to post Share on other sites
Once Analog 153 Posted September 19, 2013 Share Posted September 19, 2013 Have I missed something here? I thought Vince was posting that he feels he can eliminate the bearing being the problem. Tell me more. Stay awake and learn, the fun is just starting! Vince Link to post Share on other sites
Upfront 1,954 Posted September 19, 2013 Share Posted September 19, 2013 But we can't see the fun... There's no pictures!!!! Link to post Share on other sites
lovetube 657 Posted September 19, 2013 Share Posted September 19, 2013 Stay awake and learn, the fun is just starting! Vince Exactly Vince. I still don't believe the bearing was causing the problem . but I'm all ears /eyes open . let's wait for your finding. regards Duc Link to post Share on other sites
unclemack 3,299 Posted September 19, 2013 Author Share Posted September 19, 2013 So far it's great news but the Luxman has tricked others including me in the past...Just when you think you have it licked..BAM! it starts speeding up again. Time will tell. In the meantime, here's some pix courtesy of the man himself... Cheers M 1 Link to post Share on other sites
Once Analog 153 Posted September 19, 2013 Share Posted September 19, 2013 I would disasemble the bearing completely , clean it and check for any falt specially the ball bearing if there is one , depend on how the bearing clearance design to choose the oil viscosity . synthetic oil should be good . Lovetube Hi Duc, Are you contradicting yourself? Vince Link to post Share on other sites
lovetube 657 Posted September 19, 2013 Share Posted September 19, 2013 Hi Duc, Are you contradicting yourself? Vince hahahaha. Vince. cleaning/ servicing the bearing for this table age is a good thing's and is a piece of mind but as I said earlier it will not be the bearing that cause the speeds to go yo yo . as you discover the bearing tolerance is super on this deck . dirty bearing won't cause the problem it has . i have due with lot of Japanese deck of this age and speed issue always been electronics . regards Duc Link to post Share on other sites
Once Analog 153 Posted September 19, 2013 Share Posted September 19, 2013 [quote name="lovetube" post="954200" i have due with lot of Japanese deck of this age and speed issue always been electronic a Duc Hi Duc, Me too, but have learnt every road is a different story. This one seems to be on track! Vince Link to post Share on other sites
andyr 5,749 Posted September 19, 2013 Share Posted September 19, 2013 Aah, Vince, Duc ... belt drive TTs like the LP12 don't have a speed problem! Regards, Andy Link to post Share on other sites
CraigC 315 Posted September 19, 2013 Share Posted September 19, 2013 Great work Vince. Link to post Share on other sites
Once Analog 153 Posted September 19, 2013 Share Posted September 19, 2013 Great work Vince. Hi CJCC67, To your credit as well. Vince Link to post Share on other sites
Jake 4,031 Posted September 19, 2013 Share Posted September 19, 2013 I thought the bearing was "not part of the problem". How can one be confident of success yet? Did I miss something? Still reckon the motor is dodgy myself. Link to post Share on other sites
lovetube 657 Posted September 19, 2013 Share Posted September 19, 2013 Aah, Vince, Duc ... belt drive TTs like the LP12 don't have a speed problem! Regards, Andy can't be better than that Andy . Vince. I hope that is what it is and you have solved it . regards Duc Link to post Share on other sites
unclemack 3,299 Posted September 19, 2013 Author Share Posted September 19, 2013 Aah, Vince, Duc ... belt drive TTs like the LP12 don't have a speed problem! Regards, Andy But not belt drives like the Luxman? Cheers M Link to post Share on other sites
andyr 5,749 Posted September 19, 2013 Share Posted September 19, 2013 But not belt drives like the Luxman? Cheers M Aah, your Luxman is a belt drive, too, UM? I had assumed, being a well-thought Japanese TT, it must be DD. Regards, Andy Link to post Share on other sites
unclemack 3,299 Posted September 19, 2013 Author Share Posted September 19, 2013 Aah, your Luxman is a belt drive, too, UM? I had assumed, being a well-thought Japanese TT, it must be DD. Regards, Andy Ha ha.... Link to post Share on other sites
andyr 5,749 Posted September 19, 2013 Share Posted September 19, 2013 I thought the bearing was "not part of the problem". How can one be confident of success yet? Did I miss something? Still reckon the motor is dodgy myself. Yes, I think you "missed something", Jake! Stuart fixed the "motor problem". The drive IC still ran away and the speed increased. He posted that he could get this effect to happen, simply by heating up the IC with a hair dryer. That says to me that something was causing the drive IC to work overtime, so it got hot. It makes sense to me that bearing friction could have caused this - the speed was slowing ... so the drive IC was working overtime to increase speed ... so it got hot. Remove the friction ... and the drive IC doesn't have to get hot ... so the speed remains constant. Why the friction - it would seem old, dirty oil? Regards, Andy Link to post Share on other sites
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