So my scope loses collimation when I engage the mirror locks after collimation is successful. I’m going to put a Crayford on the back and lock it down then collimate that way I can see if it works. Ive got a suspicion that when I screw down the knobs on the rods to lock the mirror there maybe a touch of tugging on the rods being clamped down. I believe the rods are somehow attached/fixed to the mirror cell. These rods move in and out only when the course focuser is used. When the rods are clamped the course focuser is tight and hard to move as the rods are holding the mirror in place. At this stage I’ve followed the process but stars appear like they have a small comet tail after collimation is done and I try to lock the mirror. Any one no any trick I don’t with collimation or am I supposed to chase it all night long. I forgot to mention that I’ve also found that the course focuser is adding to the issue with the mirror flopping around a fair bit when trying to re focus the star back into focus. Could the focus mechanism be the issue here and if so how do you tighten the tolerances? Is it a know issue for the course focuser to put misalignment into C14s after collimation is done and refocusing the star? I’m scratching my head here not knowing what can be causing it?? Mirror locks or focuser? That is why I’m opting to lock down the mirror and try using a Crayford for the process as this will not shift the mirror. If I’m still having issues would there be any issues with the mirror and whatever is cradling it and is there a fix for that or some type of servicing that can be done to tighten things down seeing it’s an old scope?
Late 90s model C14
Edited by HCR32, 30 August 2019 - 09:20 PM.