Originally Posted by Silent One
The Wheel is a bit warped - okay, maybe just a bit unbalanced. And it drags. Not terribly so but it is noticeable. Unsure if this is related to the unbalanced revolutions or if the motor/drive is starting to have issues. Haven't yet bought a record clamp/weight, could that possibly help my cause?
What you are noticing can or can not be a big deal. Are you referring to the "wheel" as the platter which the record sits on? If the table is having drift issues your going to see it on the strobe. The platter can have some small movement maybe from side to side but that may not effect the speed and just be how it was made.
The markers on the strobe should only drift slowly back or forward, showing how locked it is in speed. Some one else can chime in here but I don't think it is even possible to have speed changes which are that fast.These strobe-direct-drive systems lock in at 33.3 rpm or 45 rpm and show you as the strobe flashes on the marking along the base of the platter. Some let you adjust the TTs speed in small increments to get the markings to give the effect of staying still. These little bars only drift slightly back and forth showing you are quartz-locked into your needed rpms. In the case you have described there would be no such perception obtainable. The bars would always be a blur, as the platter was slowing down and speeding up per rotation.
They can be from power surges from the AC effecting the speed of the drive motor. I think your direct-drive system stops that though? The AC has more of a speed effect with something like a simple motor/belt used with a VPI system.
The platters are usually not made out of something that could warp. There is a much better chance to get warp from your records.
When you say it drags, are you hearing a contact resulting sound. I'm more accustomed with 1200s but I'm guessing the platter comes straight up and off? Maybe not? Any electronics guy can tell you if the motor is failing. The record clamp is theoretically to reduce slipping by the record. They even make record rings too which help press the edges down reducing the adverse effects of a record warp.
Are you actually hearing a tone wobble in the music like you have a non-constant speed issue? Hard to believe the sound would change per single rotation?
Edited by Redcarmoose - 11/4/12 at 4:58am