Problems with IBM 6500 printer

I need to print 237 wide characters in an IBM 6500 printer. For doing this, do I have to do any setting adjustments in the printer?
The same printing task is perfectly done by IBM 6400 and IBM 4230.
But the IBM 6500 prints the character at 10 cpi and the data on one line prints in one and half line.
Please give some ideas
