Wanted - Vernier Calipers for a couple of days

[RobertM]

Has anyone got one of these that I could borrow for a day or two.

Thanks
Robert

[Fay]

 

[Mac]

Nope but i've got a micrometer if thats any help.

[Ian]

I have both if you can wait until next Thursday?

[RobertM]

Thanks Guys.

I need the calipers to recenter the C11 secondary; unfortunately it moved when I put the hyperstar on a little too tightly.  I don't know why they can't make those assemblies self centering but any road I'll be more careful in future.

Next Thursday should be fine Ian.

Robert

[MarkS]

How accurately does it need to be centred?

Mark

[RobertM]

I don't know but I aim to do it as accurately as possible.  First re-center the secondary assembly in the corrector then check the corrector in the housing.  When I use the Hotech collimator the secondary housing looks well off but that may be a result of a couple of things still to be investigated.  I'll also check that the baffle tube is square while the corrector is out by measuring distances to the OTA.

I dont expect that anything other than the secondary housing needs adjustment but I might as well check the other bits for peace of mind.

Robert