problem with render widget to PDF

Hello! I want to render a widget to a .pdf file, but I ran into a problem.

Code:

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x = (printerResolution / 2.54) * (tableWidth * 2.54) / self.DPI    # widget width
        y = (printerResolution / 2.54) * (tableHeight * 2.54) / self.DPI    # widget height
        printer = QtPrintSupport.QPrinter(QtPrintSupport.QPrinter.HighResolution)
        printer.setOutputFormat(QtPrintSupport.QPrinter.PdfFormat)
        printer.setOrientation(QtPrintSupport.QPrinter.Landscape)
        printer.setOutputFileName(f"example.pdf")
 
        printer.setPageMargins(0, 0, 0, 0, QtPrintSupport.QPrinter.Millimeter)
        printer.setFullPage(True)
        printer.setPageSize(QtPrintSupport.QPrinter.A4)
 
        painter = QPainter()
        painter.begin(printer)
        rect = painter.viewport()
        painter.setViewport(rect.x(), rect.y(), tableWidth, tableHeight)
        painter.setWindow(rect.x(), rect.y(), tableWidth, tableHeight)
 
        xscale = (printer.pageRect().width() / x) * 0.5 # when instead of 0.5 I insert a higher ratio (> 0.5) I get an empty .pdf file
        yscale = (printer.pageRect().height() / y) * 0.5 # same
        print("PAGERECT$", printer.pageRect())
        scale = min(xscale, yscale)
 
        painter.translate(printer.pageRect().topLeft())
        painter.scale(scale, scale)
        self.table.render(painter)
        painter.end()

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Why is the .pdf file drawn only when the coefficient is not more than 5? :(