[ATM] FW: Making another scope. GPD, Glass Pushers Disease.

["Bill Hollenbach" <wjh1@absamail.co.za>]

  _____  

From: Bill Hollenbach [mailto:wjh1@absamail.co.za] 
Sent: 13 April 2005 08:35 PM
To: 'atm@atmlist.net'
Subject: Making another scope. GPD, Glass Pushers Disease.

 

After vowing never to make a scope again, I have succumbed to the incurable

Glass Pushers Disease. I have tackled a 24" f 5.2 Newtonian and have
completed the optics

and I am presently building the drive.

The last drive I built, was 15 years ago, and was adequate for the needs of
the scope.

As I have learnt, it is totally inadequate for the 24".

 

I will have to get a computerised, home built drive mechanism that can run
with either

The Sky (which I would Prefer) or Starry Night. 

I do have other programs, including Cartes Du Ciel.

ANY help regarding this will be GREATLY appreciated.

I am torn between a DC Servo drive and a Stepper Controlled system.

I believe the latter is a lot better to build.

My previous drive was a 220V 10 RPM motor, driven via a frequency controlled

inverter.

So, as you can see, technology has since slightly advanced.

The scope I am building is an Equatorial Fork Mount.

 

I learnt a lot from Gleanings for ATM's in the Sky and Telescope magazines

and found the ATM guys terrific.

Hope to hear from you soon.

 

Bill Hollenbach,

http://www.astronomysa.co.za

http://www.rhinolion.co.za

African Dark Skies, Is Our Heritage

Ukhuphela Nyelethi

The Living Stars

 

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