Is it focuser adjustment

[andyo]

Hi I have a laser collimator and this itself has been collimated and checked,however when I put it into the focuser(using an orion precision centring adapter) with the dot in the dougnut circle and rotate it the dot moves out of the circle and back in when rotated through 360 rotation .I certainly dont know the answer to this but am thinking this may be caused by the focuser not being squared properly with the secondary,I know the focuser has adjusters to do this but I dont know what the procedure is to check and adjust it.Can anyone offer advice on this

[Steve Ward]

Just posted an answer on the other channel Andy....

Steve.