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Advice/feedback needed on Morch UP4 setup

I am trying to set up a new Morch UP4 arm on a new Amazon Model One table. I have no experience or exposure to this set up or any experience with setting up arms and carts since the early eighties. The question I have is concerning the lack of stability of the assembly at the pivot point. Should it be loose? I have put the weights on and installed the wand and it is still very unstable at the pivot point. I realize this assembly is riding on a bearing and that it is really the only point of contact but I can't beleive it is not supported laterally somehow. For instance, if I have the arm in it's base along with the prescribed weights on and the wand installed and I pick it up by the head shell with one finger it rotates, or spins, if you will. I hope this question makes sense, if anyone out there has set up a Morch UP4 hopefully you have seen the same. An advice/ experience/ feedback is greatly appreciated.
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dougdeacon
3,338 posts
 
Hi Wdt,

The UP-4 is a unipivot, which means the the arm is supported entirely on a single, sharp point resting in a small cup (or possibly the reverse). There is no lateral support of any kind. That would defeat the intention of the design, which is to eliminate bearing friction.

All unipivots rotate about the axis of the armtube when torqued rotationally, as by lifting with the finger lift. This is normal but it does take some getting used to.

The critical thing is that the stylus be vertical when riding in the record groove. This adjustment is called "azimuth". On a UP-4 I believe this is accomplished by rotating one of the counterweights. Hopefully there are instructions for this in the manual.
jofi
24 posts
 
What you remark on is normal,when you lower the arm onto the record you will see that the arm is stable as it tracks the groove and that is what is important.
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wdt OP
12 posts
 
thank you gentlemen, I will proceed
wdt
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