LM629 interface problems.

[dreamproject]

Hi all ,

I want to use a PC's parallel port to control LM 629's. But the 629 requires more i/o lines than the port can provide . Can i use an intermediate device like the 8255 to communicate . The lm629 requires commands for inititialization and operation. Any suggestions ?


Also another blunder . I ordered the encoders with a 1/4 inch through shaft hole (which i realize is way too small ) . If I connect thro' this shaft hole (1/4" aluminium shaft ) to a gear with an ample sleeve length (overlapping most of the free shaft length) , will it hold without failure or do i have to shift to mild steel . shaft length is about 1" (between encoder and gear face , but a sleeve covers this 1")

Thanks for ur input

 

[nbucska]

The PC parrallel port has one 8 bit output [D], one 4bit output [C] and
one 5 bit input ports.

I would use the D for 8 bit output, S for a 4 bit input and one but of C
to switch upper/lower nibble of input. This leaves 3 bits of C
for control signals