help with clearance between sme 3009 arm's tube and arms lifter assembly
Hello Mijostyn i already screwed the arm lifter ring the lowest as possibile to the pillar's thread. So I coudl not unscrew more than this... Luca |
Hello and thanks to geof3 and millercarbon ! I would tell you that a solution could be in not raising the arm but lowering it. Since the distance between the edge of the knife (the point of rotation of the arm around the vertical axis) and the arm lifter is fixed, if I rise the arm, I will decrease the distance between the arm tube and the arm lifter. If I decrease the arm height, then the distance between the arm lifter and the arm tube will increase. You can see the drawings at: https://i.imgur.com/IMQEkkq.jpg So, apart form having to lower rather than raising, picking your suggestion there's no way out than to modify the arm's height. This means not having the headshell parallel to the LP surface anymore... and a change in VTA. The point I see is that it is not a matter of the turntable type but if I need to have the headshell parallel to the LP surface (if I need to...) then the SME 3009 lifter will not work properly. So the point is: do you know if the shell has to be parallel to the LP surface to achieve the best setup for the arm or is the arm designed to work with a different inclination of the shell ? This question is rising in my mind ! Thanks Luca |
sorry ALL of you for the late response but I was at work. I read very very carefully all of your posts which helped me to better understand the current situation. Yes the arm was rebuilt and has the brass knife (also rewired with vey nice VDH cable...) . Anyway, to see if there was any difference in rising the arm with the former plastic knife I re mounted the old knife but find out that the clearance is still exactly the same as with the bronze knife. So this was not the cause of the problem. Concerning the question if the arm hits the rubber or the metal case of the lifter... it depends how high it is mounted ! The arm sits on the rubber on the lifter if I exactly mount the headshell parallel to a LP surface, and it hits also the outer edge of the metal case of the lifter in case I eliminate the rubber semi arc and lower a little the arm... So... the current sad situation is that I am to put out the rubber semi ring on top of the lifter and give up to a "hopefully" perfect VTA, mounting the arm at an height which is a little lower than the best, so that the clearance between the arm's tube and the lifter edge is sufficient to play LPs. Personally, I do not like this but can't see more choices... anyway it still looks to me very strange even because, looking at your photos the installation looks very neat and simple ! Luca |
@mijostyn bought a new headshell. it is still not parallel to the arm.... bah I think the problem is with the arm's socket. Maybe it is worth changing it? I found a socket by audiosilente... @dover please, could you post a photo of your arm showing the gap you're talinkg about? So I coudl make my mind about your point. moreover, I could try to use another pillar bearing assembly (it is the original one I changed with another bought on ebay) to have a newer one. Many thanks ! Luca |
