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[quote]QUOTE: Originally posted by CP5170 I purchased a Walthers turntable kit and it is not worth the money. We have disassembled it twice to get it to run smoothly. I am going to rework the motor mechanism as well as the bridge itself. On Saturday, I was on a layout tour and visited two layout that had Walthers turntables. In both cases, the owners were very dissatisfied with their kits. One was an older kit ( 3 years. like mine) and the other was the new kit. They had to rework the drive mechanism and replace the motor with a dehumidifier motor. Ken [/quote] I have a Heljan turntable ( they made the Walthers TT) and I've heard similar complaints. So I set off to solve the problem of jerky motion. Your bridge probably sits more on the trucks than on the bearing. On an old Volkswagon Beetle, the generator belt was adjusted with adding / removing shims on the generator pully. Those shims are a perfect fit for under the bridge bearing. You only need one to lift up the bridge a few thousands. Be sure your bridge rail is the same height as the lead rails. I hand laid code 83 rail on my bridge. Another thing you need to have correct is the piece that the bearings set on (I call it a bearing race) is sitting flush with the pit bottom(view from the top). If not use the shim(s). I also fabracated my drive in a way that allows bridge removal. The drive shaft on the bridge side has a "T" slot to allow any misalignment of the drive. The motor side has a "T" piece made of brass rod stock. The connecter was gutted out of a Ero style terminal connector. I runs smooth, not like a clock with a sweeping second hand, but pretty good. The Wathers motor could be a stepping motor which would give a slight jerkyness. [img]http://home.ripway.com/2004-3/90183/ttdrive2.jpg[/img] [img]http://home.ripway.com/2004-3/90183/ttdrive1.jpg[/img] [img]http://home.ripway.com/2004-3/90183/roundhouse2.jpg[/img]
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