St80 t

[Adidaz 29]

Hi got an st 80 I take abroad with me but I've noticed the round focus start spinning  and the focuser is stuck I've tightened. The wheel  screws  up and the small plate at the back it runs on a straight piece of metal like a cog  any sugestions on how to fix the problem or can I buy a new piece many thanks clear skies n pork pies

[Alien_Photons]

If it has a Crawford focused then there should be a thumb screw directly under the focuser that when tightened increases the friction between the tube and spindle thus reducing the slipping.

[happy-kat]

This is worth a watch just to see how the focuser adjusts, from 10 minutes.

link here

[Alien_Photons]

I think I understand that your saying the gears are not meshing. Check its assembled correctly as per the video.

[Adidaz 29]

22 hours ago, happy-kat said:

This is worth a watch just to see how the focuser adjusts, from 10 minutes.

link here

Thanks I'd seen this video befoe but I missed a bit but I now now the problem so I know how to fix it thankyou happy katKat