When collimating my MN-76, I was rotating the laser collimator in the eyepiece holder, and noticed that the light also moves in an eccentric circle, about 3/8" in diameter, on the primary. When using a cheshire collimator, it is also doing the same thing, except it is the donut hole that is moving in a circle. I would appreciate some input, if anyone knows what causes this. Thanks in advance. Dave
Collimation Problem
Started by suprdav, 02/03/2003 07:27AM
Posted 02/03/2003 07:27AM
Opening Post
Posted 02/03/2003 01:48PM
#1
David,
I would say that your laser collimator needs to be collimated, except that your cheshire is doing the same thing.
Here are a couple of things you can try.
Find a kitchen counter or a floor or something that is very flat. Turn the laser on, set it on the counter or floor, and point it against a nearby wall. Roll your collimator along the counter or floor. Does the beam trace a perfectly flat line against the wall? If yes, it is collimated....If no.....collimate it.
Check your slop in the focuser. Can you change where your laser point hits by merrely pushing on the collimater?
Rack your focuser in and out. Does this change where the point hits?
Alex
I would say that your laser collimator needs to be collimated, except that your cheshire is doing the same thing.
Here are a couple of things you can try.
Find a kitchen counter or a floor or something that is very flat. Turn the laser on, set it on the counter or floor, and point it against a nearby wall. Roll your collimator along the counter or floor. Does the beam trace a perfectly flat line against the wall? If yes, it is collimated....If no.....collimate it.
Check your slop in the focuser. Can you change where your laser point hits by merrely pushing on the collimater?
Rack your focuser in and out. Does this change where the point hits?
Alex
Funding Member
