Keith,
welcome to the forum,
no there is not an adjustment for the puck advancer. IMO the best thing to do is remove the smoke generator from the cabinet and make sure nothing is obstructing the advancer or the pathway of the puck.Sometimes wood chips can get in there. If after this it continues I would call Bradley, they have great customer service.
<i><font color="blue"><b>Jack</i></font id="blue"></b>