ATM [Fwd: BOUNCE atm@shore.net: Non-member submission from [SHANE LAPIERRE <SLAPIERR@bcbsct.com>]]

[Mel Bartels <mbartels@efn.org>]

> From: SHANE LAPIERRE <SLAPIERR@bcbsct.com>
> To: atm@shore.net
> Subject: Computerized Dobsonian
>
> I am a new subscriber to the list, and have been reading for a few days.  Looks like a 
>lot of neat 'stuff'!!!  Anyway, I'm currently working on a 20" dob using the 
>Kriege/Berry book.  I've got the cell built, and the secondary cage just
> about complete.  I'm following close protocol on all the details as I have not found a 
>legitimate reason to change much.  However, before I dive into cutting wood for the 
>rocker box I'm doing research for adding a drive system.
>
> I did some reading about the cylindrical platform, but I recently inherited a PC that I 
>can take in the field, so the Computerized Dob seems a possibility.  I don't know much 
>about steppers, other than from reading Mel's site, and I'm also
> concerned about how much effort (i.e. $$$) it will take to get the gear reduction 
>correct and accurately functional.  Is there a good resource for gearboxes?  Kreige's 
>design calls for 26" alt bearings, so I am curious what others that had
> this type/size scope have done.  I'm not ready to purchase any high priced worm-gear 
>assemblies at this time, so what other options are there?
>
> slapierr@anthembcbsct.com