SD501 regulation of step of subtray

[Guest]

I have a problem with regulation of step of tape of subtray ;
I have 2 SD501, the first stacks the folded sheets at exit of subtray with a correct step, the second instead stacks with too much distance.
I would know how adjust this, because I don't find the setting on finisher adjustment.

[Kreat]

conveyance belt of bunble exit tray

I'm sorry, the problem is the regulation of step of conveyance belt of bundle exit tray.
Please if you know this problem, let me know.
Thanks