[comp.periphs.printers] Brother M1509 can't change mode properly in NLQ

jlavi@ujocs.joensuu.fi (Jarkko Lavinen) (08/30/90)

	Greetings!

	I've had M1509 for years, but recently this feature has annoyed me a
	lot.  The problem is that in NLQ the head makes the first pass, moves
	about 3/432 th of an inch down and makes another pass. I think most
	printers do their NLQ printing this way.

		If there are mixed printing modes on the line, like bolds or
	superscripts, each of them are made with their own passes. Following
	picture gives an exaggerated idea of the problem:

	normal
		   BOLD                
				back in normal
							   ANOTHER BOLD
											more normal text


	If the head would go slightly up just before switching to a new
	mode, there would be no problem at all. 


	I wonder if anybody else have expereinced problems with this and what 
	kind of cures he has found if any.

	The distance between pins in a head is 3/216th of an inch. There is
	command to move head up n/216th of an inch. Unfortunately there is
	no command to move head up in 1.5/216th of an inch, as the head moves
	this amount of down when it does the second pass in NLQ mode.

	I use mostly Word Perfect and I have customised mine printer driver
	to do some extra move up here and there in mode switching commands.
	I've succeeded to reduce the effect, but I've found no way to remove
	it. 

	Has anybody asked manufacturers word about this ?

	One more thing: I purchased mine from Finland. There may be several
	versions of M1509 around.


		Jarkko Lavinen