Rock-Ola 1478

[juke46]

A few years ago purchased a nice looking Rock-Ola 1478 for almost nothing.  It was partially disassembled but appeared to be all there.  Did all the usual and put everything back but had a difficult time adjusting those pesky Cam Switches.  Got it done and it has worked fine for years.  I really had (still have) a difficult time understanding the manual on the Cam Adjustment.  I tried to make only minute switch adjustments and it has worked great ever since. No attempt to adjust the Cam itself. Today the wife was merrily playing it and it stopped in the middle of a melody.   I think that I never really had those cam switches quite right.  Today after reading the procedure I am stuck on "Cam Adjustment" first step.  I'd like to check that cam adjustment.  There are 3 micro-switches operated by that cam.  The cam is secured in place by two Allen set screws.  That being a mechanical device operating the micro-switches I am hesitant to fool with that adjustment.  it seems the factory setting would be unlikely to change much.  

The cam adjustment procedure, which I hope not to mess with, states as part of that procedure: "Rotate the knurled end of the grip motor clockwise, until the two stop pins (Fig. 6) meet.  OK, I've been through the manual, pictures and all but I can't find the "stop pins".  Does anyone know where they are and what the heck they look like?  I would like to see how close to proper adjustment the Cam actually is.

The microswitch themselves have some adjustment.  I will concentrate on that instead of the cam itself.  Just curious about those Stop Pins that I cannot find!
Thanks Everyone!

 

[Ron Rich]

David,
I would assume, that your assumption, that the factory setting would be unlikely to change much is about 95% correct. My assumption would be that the factory adjustment ( unless "fooled with"), would NEVER change, at all. I would further assume that you have a Micro Switch ( are you sure they ARE "Micro Switch brand"--Not "Litton" brand ?), that has changed--Once that happens-- that switch is usually un-reliable ! ( see our FAQ's section on "Micro Switches"). As for the "stop pins"--I dono--maybe someone else will chime in --- Ron Rich

[juke46]

Rockola 1478 completed. Working well. Which switch will fail next? I found, in my spares, a couple of microswitches from Rockolas. All test good so I'll have a couple spares. I would rather have a new switch but we'll see what happens. I was thinking, how I hate to solder as I shake around a lot these days. Found the switches have removalable lugs, just a small slotted screw holds each lug. No overheat problems with my clumsy soldering. That Anna is gonna have to learn to solder!