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

["Martin Lyons" <mlyons@iafrica.com>]

Geeeeez Bill !!!

Hoesit my broer?

Haven't heard from you for a gazillion years.
Glad to see you're still ready, willing and able to push glass.

I've been keeping up with the old telescope stuff and lurking on this list
for some time.
Made a 14" f4.5 Dobby a while ago.
Busy with a 22" at the moment (early stages of hogging)

I'll drop you a private mail so we can catch up.

Cheers
Martin (Slartybartfast)


-----Original Message-----
From: atm-bounces@atmlist.net [mailto:atm-bounces@atmlist.net] On Behalf Of
Bill Hollenbach
Sent: 13 April 2005 20:42
To: atm@atmlist.net
Subject: [ATM] FW: Making another scope. GPD, Glass Pushers Disease.

 

 

  _____  

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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