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Collimation springs
As you can see from a previous thread below, I was having trouble collimating my 8" collapsible Skywatcher.
Well I decided it was time to wash my mirror yesterday and discovered that there are no springs on the primary mirror, instead there are small rubber washers/grommets.
That explains why I was having problems, the washers/grommets would only have very little compression force to move the mirror forward, so I may try and replace them with springs at a latter date, if I can find any. Anyone one else change their springs on a Skywatcher?
Thanks Peter.
"Hi Wade, I too was having a hard time trying to collimate my 8" dob, what I found was, you may not have the same problem but worth a check, is that the springs on the primary weren't strong enough to push the mirror cell out when I loosened the adjusting screws.
So to get around the problem, until I find stronger springs, is to screw in all the adjusting screws then just tighten the locking screws so they apply slight pressure, now as you start to loosen the adjusting screws slightly tighten the locking screws to keep pressure on the mirror cell, so they actually are replacing the job of the springs, you can get quite fine adjustments useing this method.
Peter"
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