Go Back   IceInSpace > Equipment > ATM and DIY Projects

Reply
 
Thread Tools Rate Thread
  #1  
Old 05-01-2021, 05:01 PM
Rocket (Ed)
Registered User

Rocket is online now
 
Join Date: Jan 2019
Location: Canberra, Australia
Posts: 3
Azimuth Limit Sensing System in RCX400 Base

I am trying to refubish a 10" RCX400, replacing its damaged control and drive boards with an Arduino-based system. I have done the basics of driving the axis and collimation mirrors and reading their encoders and limit switches so far.
In looking from the bottom into the base, there are two disks with cutouts, and two optical switches. The higher of these disks is firmly attached, and moves with the OTA as it changes in azimuth. The lower of these disks, however, is loose. I can move it by hand around the central axis, and it also seems to rock slightly. This disk also has a steel block on it, about 20 x 8x10mm, which doesnt seem to be magnetic.
I cannot see any missing screws or screw holes to suggest the previous owner tried to remove or loosen this disk, and it seems I would have to almost completely remove the yoke from the base to get more access, which seems a big and risky task.
Any thoughts on why there are two disks, to provide (I assume) optical limit switching in azimuth, rather than just one to stop winding up the wiring loom from multiple rotations, and why one disk is loose?
If all else fails, I can try to implement an alternative limit-sensing scheme, but I am puzzled as to how the mount is supposed to work.
Reply With Quote
Reply

Bookmarks

Tags
limit switches, rcx400, telescope refurbishment

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 04:59 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Advertisement
Limpet Controller
Advertisement
Bintel
Advertisement
Testar
Advertisement
NexDome Observatories
Advertisement
Astronomy and Electronics Centre
Advertisement