[Laser] Stepper motor control of laser communication unit

[TWOSIG at aol.com]

This has been a very interesting thread.  Thanks guys!

Please include me in for a copy of the article if it does not get posted on 
the web.  

I am curious what the scan range of the micrometer systems are typically.  I 
think Kerry said that he is using a 12" bar hinged.  Is that with a micrometer 
with a 1" range?  ( That would be 83.3 mR adjustment.)  Do you typically use 
as much as 50mR on a setup?


I am working on a rather bulky tripod and table that I was going to use a 
6-32 threaded "shaft" with a horizontal arm of 31.25 inches in the design.  That 
would give 1/32nd inch movement per revolution of the shaft and a 1.0 mR angle 
change.  At first I thought of about 120 mR ( 60 mR either side of center).  
Does that seem like too much?   

Have not worked out the vertical adjustments, but they will probably be 1/2 
to 1/5th the rate due to mechanical advantage.   For a manual system, I may try 
to use a flexible link to the adjusment dial.


Best wishes.

James 
N5GUUI