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Ultimarc U-Track Problems
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AndyWarne:
I have replied by email but one possibility is loose screws  on the optical spoked wheels from insufficient tightening on assembly. We have recently introduced a manufacturing change to use threadlock on these screws.

Easy fix to tighten the screws.

Andy
seinfeldfan64:
No loose screws.  Turns out if I apply a little pressure on the PCB toward the wheel, it works much better.
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