dot-matrix & star sp200 buffer overload problem

FR version is 3.24

I'm using dot matrix report, and Star SP200 POS Printer.

When too many lines are sent to printer it stops responding - it's problem we have with all printers from the sp200 line. Before using FastReport, I was making dot-matrix reports "manually" - printing line by line, and after every 10th line I was using sleep(3000), and then continue...it worked fine.
Now, I couldn't found such kind of option/command in FR, something that will pause printing for certain amount of time - so the damn printer buffer empties, and then continue. Neither could I find any printer esc command that could help me.

Anyone have idea what can i do?

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