Got trash. need info

[methuso]

I im really a noob at this, but i like a challenge
I want to make a mill and later a FoamCutter. (Im a RC-plane builder/crasher)
Well ive been looking around for about 6month now and i can't figure this out.

edited the below link to make direct hit.
I got 4 LB1845 http://service.semic.sanyo.co.jp/semi/ds_e/EN5505B.pdf that i got from a couple of inkjets.
I really would like to use these to drive the 4 motors that came with them.
Those steppers are 4 leads Mitsumis that i found out would be unipolar using the case for 5th lead.
2 are Mitsumi M42SP-5
(http://www.mitsumi.co.jp/Catalog/com.../5/text01e.pdf)
and 2 are Mitsumi M42sp-7
(http://www.mitsumi.co.jp/Catalog/com.../7/text01e.pdf)

Same specs but diferent measurements.

Well now for the part i dont understand.. THE REST. Does anyone have any schematics for using these kind of drivers?
Maybe just explainging the leggs on the LB1845 would help me too. i see no dir-pin etc.

please someone help and please excuse my english. Im a swede
Best regards/Methuso
for direct kontact: ulf@jamtland.nu

[fkaCarel]

I looked at the block diagram and there is no counter in it, so no puls/direction. You also have to define the PWM frequency. You can approach this problem in three way's:

1) with a 4510 (presettable up/down counter), make a table which logic combination should activate which coil, and feed this through a Eprom or hard wired logic, which contains the steps.

2) Make it in programmable logic, it probably will fit in a GAL. It is a little harder to master, it is the same as above, but in 1 package.

3) program it in an TinyAVR. Along the way you learn to program the new cockroach of microprocessors, also 1 package, but with active Internet support. The crazy thing is that these processors cost (for me) Euro 1.37, which for me would exclude choice 1 and 2, because they are more expensive.

Carel

[methuso]

ok thanks. ill look into it this weekend
Im getting help from a friend that might jus now what You are talking about

/Methuso