No, the double springs are on the primary mirror cell Ken. The secondary should never move on you anyway unless you give the OTA a hard knock or something..
I agree, I have never had any problems with my 2ndry moving. I would love to change this wierd 6 point system the GS 12" has and make it a simple 3 point collimation set-up like my old 4 1/4" had.
Oh? A 6 point? That's interesting! Would that make it harder to collimate?? I would imagine so. Wonder why they added that 'feature'....Probably for added strength to stop it going out of collimation. How often do you have to collimate your scope?
Not often. The 6 point system works on 3 pulling and 3 pushing. the 3 pulling screws are spring loaded. The idea behind it is to collimate with the 3 sprung ones and then lock them with the 3 pushing ones. Problem is if you do up the pushing ones just a smidge too much it changes the collimation.
The principle is to lightly finger tighten the lock screws but I found it kept going out of alignment too often so now I get it as close as possible with the sprung ones and then collimate it perectly by doing up the lock screws tight and collimate using them. I know it's the wrong method for this design but hey, it works and hardly ever goes out of collimation any more.
But it was all so much easier on my old 3 screw reflector!
Collimation free mirror is possible .
My Conical mirror has not been touched for three years since it was built except for when I made the focuser cage a rotating cage.
It has been over some rough dirt roads in the back of a ute.
The truss assemble does not disassemble thou so that is a concideration.
The conical mirror is located on a central stud and held in place by the stud with 4 O rings on the central hole, and a front retainer cap.
I have removed the mirror for various reasons and as long as it is replaced in the same orintation , does not require re collimation.
The Cell assemble is a 3 arm spider with push pull screws .
No floatation points , mirror straps or mirror retaining clips.
No springs here , once adjusted and locked thats where it stays , full stop end of story.
Very easy to adjust.
The black lock bolt is wound out a little to allow the silver adjuster to be free.
The adjuster is held in place by the nylock nut and is tightened just enough to allow the bolt to turn .
Simple but very very effective.
Once adjusted do up the lock bolts.
Actually you don't even need the lock bolts , but are there just to be sure.
Collimation free mirror is possible .
My Conical mirror has not been touched for three years since it was built...
Do you by any chance also have an optically perfect 0.5 mm - 40 mm zoom eyepiece to go with it?
Apparently it is as common as collimation free Newtonians.
